Imported Debian patch 0.9.6+really0.9.3-0.1debian/0.9.6+really0.9.3-0.1

1 files changed, 477 insertions, 616 deletions

diff --git a/gnulib-m4/printf.m4 b/gnulib-m4/printf.m4
index d06746aa..ebca5364 100644
--- a/gnulib-m4/printf.m4
+++ b/gnulib-m4/printf.m4
@@ -1,5 +1,5 @@
-# printf.m4 serial 52
-dnl Copyright (C) 2003, 2007-2015 Free Software Foundation, Inc.
+# printf.m4 serial 33
+dnl Copyright (C) 2003, 2007-2010 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -17,8 +17,7 @@ AC_DEFUN([gl_PRINTF_SIZES_C99],
   AC_CACHE_CHECK([whether printf supports size specifiers as in C99],
     [gl_cv_func_printf_sizes_c99],
     [
-      AC_RUN_IFELSE(
-        [AC_LANG_SOURCE([[
+      AC_TRY_RUN([
 #include <stddef.h>
 #include <stdio.h>
 #include <string.h>
@@ -32,56 +31,53 @@ AC_DEFUN([gl_PRINTF_SIZES_C99],
 static char buf[100];
 int main ()
 {
-  int result = 0;
 #if HAVE_STDINT_H_WITH_UINTMAX || HAVE_INTTYPES_H_WITH_UINTMAX
   buf[0] = '\0';
   if (sprintf (buf, "%ju %d", (uintmax_t) 12345671, 33, 44, 55) < 0
       || strcmp (buf, "12345671 33") != 0)
-    result |= 1;
+    return 1;
 #endif
   buf[0] = '\0';
   if (sprintf (buf, "%zu %d", (size_t) 12345672, 33, 44, 55) < 0
       || strcmp (buf, "12345672 33") != 0)
-    result |= 2;
+    return 1;
   buf[0] = '\0';
   if (sprintf (buf, "%tu %d", (ptrdiff_t) 12345673, 33, 44, 55) < 0
       || strcmp (buf, "12345673 33") != 0)
-    result |= 4;
+    return 1;
   buf[0] = '\0';
   if (sprintf (buf, "%Lg %d", (long double) 1.5, 33, 44, 55) < 0
       || strcmp (buf, "1.5 33") != 0)
-    result |= 8;
-  return result;
-}]])],
-        [gl_cv_func_printf_sizes_c99=yes],
-        [gl_cv_func_printf_sizes_c99=no],
-        [
+    return 1;
+  return 0;
+}], [gl_cv_func_printf_sizes_c99=yes], [gl_cv_func_printf_sizes_c99=no],
+      [
 changequote(,)dnl
-         case "$host_os" in
-                                 # Guess yes on glibc systems.
-           *-gnu*)               gl_cv_func_printf_sizes_c99="guessing yes";;
-                                 # Guess yes on FreeBSD >= 5.
-           freebsd[1-4].*)       gl_cv_func_printf_sizes_c99="guessing no";;
-           freebsd* | kfreebsd*) gl_cv_func_printf_sizes_c99="guessing yes";;
-                                 # Guess yes on Mac OS X >= 10.3.
-           darwin[1-6].*)        gl_cv_func_printf_sizes_c99="guessing no";;
-           darwin*)              gl_cv_func_printf_sizes_c99="guessing yes";;
-                                 # Guess yes on OpenBSD >= 3.9.
-           openbsd[1-2].* | openbsd3.[0-8] | openbsd3.[0-8].*)
-                                 gl_cv_func_printf_sizes_c99="guessing no";;
-           openbsd*)             gl_cv_func_printf_sizes_c99="guessing yes";;
-                                 # Guess yes on Solaris >= 2.10.
-           solaris2.[1-9][0-9]*) gl_cv_func_printf_sizes_c99="guessing yes";;
-           solaris*)             gl_cv_func_printf_sizes_c99="guessing no";;
-                                 # Guess yes on NetBSD >= 3.
-           netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*)
-                                 gl_cv_func_printf_sizes_c99="guessing no";;
-           netbsd*)              gl_cv_func_printf_sizes_c99="guessing yes";;
-                                 # If we don't know, assume the worst.
-           *)                    gl_cv_func_printf_sizes_c99="guessing no";;
-         esac
+       case "$host_os" in
+                               # Guess yes on glibc systems.
+         *-gnu*)               gl_cv_func_printf_sizes_c99="guessing yes";;
+                               # Guess yes on FreeBSD >= 5.
+         freebsd[1-4]*)        gl_cv_func_printf_sizes_c99="guessing no";;
+         freebsd* | kfreebsd*) gl_cv_func_printf_sizes_c99="guessing yes";;
+                               # Guess yes on MacOS X >= 10.3.
+         darwin[1-6].*)        gl_cv_func_printf_sizes_c99="guessing no";;
+         darwin*)              gl_cv_func_printf_sizes_c99="guessing yes";;
+                               # Guess yes on OpenBSD >= 3.9.
+         openbsd[1-2].* | openbsd3.[0-8] | openbsd3.[0-8].*)
+                               gl_cv_func_printf_sizes_c99="guessing no";;
+         openbsd*)             gl_cv_func_printf_sizes_c99="guessing yes";;
+                               # Guess yes on Solaris >= 2.10.
+         solaris2.[0-9]*)      gl_cv_func_printf_sizes_c99="guessing no";;
+         solaris*)             gl_cv_func_printf_sizes_c99="guessing yes";;
+                               # Guess yes on NetBSD >= 3.
+         netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*)
+                               gl_cv_func_printf_sizes_c99="guessing no";;
+         netbsd*)              gl_cv_func_printf_sizes_c99="guessing yes";;
+                               # If we don't know, assume the worst.
+         *)                    gl_cv_func_printf_sizes_c99="guessing no";;
+       esac
 changequote([,])dnl
-        ])
+      ])
     ])
 ])
 
@@ -96,39 +92,35 @@ AC_DEFUN([gl_PRINTF_LONG_DOUBLE],
   AC_CACHE_CHECK([whether printf supports 'long double' arguments],
     [gl_cv_func_printf_long_double],
     [
-      AC_RUN_IFELSE(
-        [AC_LANG_SOURCE([[
+      AC_TRY_RUN([
 #include <stdio.h>
 #include <string.h>
 static char buf[10000];
 int main ()
 {
-  int result = 0;
   buf[0] = '\0';
   if (sprintf (buf, "%Lf %d", 1.75L, 33, 44, 55) < 0
       || strcmp (buf, "1.750000 33") != 0)
-    result |= 1;
+    return 1;
   buf[0] = '\0';
   if (sprintf (buf, "%Le %d", 1.75L, 33, 44, 55) < 0
       || strcmp (buf, "1.750000e+00 33") != 0)
-    result |= 2;
+    return 1;
   buf[0] = '\0';
   if (sprintf (buf, "%Lg %d", 1.75L, 33, 44, 55) < 0
       || strcmp (buf, "1.75 33") != 0)
-    result |= 4;
-  return result;
-}]])],
-        [gl_cv_func_printf_long_double=yes],
-        [gl_cv_func_printf_long_double=no],
-        [
+    return 1;
+  return 0;
+}], [gl_cv_func_printf_long_double=yes], [gl_cv_func_printf_long_double=no],
+      [
 changequote(,)dnl
-         case "$host_os" in
-           beos*)        gl_cv_func_printf_long_double="guessing no";;
-           mingw* | pw*) gl_cv_func_printf_long_double="guessing no";;
-           *)            gl_cv_func_printf_long_double="guessing yes";;
-         esac
+       case "$host_os" in
+         beos*)        gl_cv_func_printf_long_double="guessing no";;
+         mingw* | pw*) gl_cv_func_printf_long_double="guessing no";;
+         *)            gl_cv_func_printf_long_double="guessing yes";;
+       esac
 changequote([,])dnl
-        ])
+      ])
     ])
 ])
 
@@ -144,8 +136,7 @@ AC_DEFUN([gl_PRINTF_INFINITE],
   AC_CACHE_CHECK([whether printf supports infinite 'double' arguments],
     [gl_cv_func_printf_infinite],
     [
-      AC_RUN_IFELSE(
-        [AC_LANG_SOURCE([[
+      AC_TRY_RUN([
 #include <stdio.h>
 #include <string.h>
 static int
@@ -177,68 +168,65 @@ static char buf[10000];
 static double zero = 0.0;
 int main ()
 {
-  int result = 0;
-  if (sprintf (buf, "%f", 1.0 / zero) < 0
+  if (sprintf (buf, "%f", 1.0 / 0.0) < 0
       || (strcmp (buf, "inf") != 0 && strcmp (buf, "infinity") != 0))
-    result |= 1;
-  if (sprintf (buf, "%f", -1.0 / zero) < 0
+    return 1;
+  if (sprintf (buf, "%f", -1.0 / 0.0) < 0
       || (strcmp (buf, "-inf") != 0 && strcmp (buf, "-infinity") != 0))
-    result |= 1;
+    return 1;
   if (sprintf (buf, "%f", zero / zero) < 0
       || !strisnan (buf, 0, strlen (buf)))
-    result |= 2;
-  if (sprintf (buf, "%e", 1.0 / zero) < 0
+    return 1;
+  if (sprintf (buf, "%e", 1.0 / 0.0) < 0
       || (strcmp (buf, "inf") != 0 && strcmp (buf, "infinity") != 0))
-    result |= 4;
-  if (sprintf (buf, "%e", -1.0 / zero) < 0
+    return 1;
+  if (sprintf (buf, "%e", -1.0 / 0.0) < 0
       || (strcmp (buf, "-inf") != 0 && strcmp (buf, "-infinity") != 0))
-    result |= 4;
+    return 1;
   if (sprintf (buf, "%e", zero / zero) < 0
       || !strisnan (buf, 0, strlen (buf)))
-    result |= 8;
-  if (sprintf (buf, "%g", 1.0 / zero) < 0
+    return 1;
+  if (sprintf (buf, "%g", 1.0 / 0.0) < 0
       || (strcmp (buf, "inf") != 0 && strcmp (buf, "infinity") != 0))
-    result |= 16;
-  if (sprintf (buf, "%g", -1.0 / zero) < 0
+    return 1;
+  if (sprintf (buf, "%g", -1.0 / 0.0) < 0
       || (strcmp (buf, "-inf") != 0 && strcmp (buf, "-infinity") != 0))
-    result |= 16;
+    return 1;
   if (sprintf (buf, "%g", zero / zero) < 0
       || !strisnan (buf, 0, strlen (buf)))
-    result |= 32;
+    return 1;
   /* This test fails on HP-UX 10.20.  */
   if (have_minus_zero ())
     if (sprintf (buf, "%g", - zero) < 0
         || strcmp (buf, "-0") != 0)
-    result |= 64;
-  return result;
-}]])],
-        [gl_cv_func_printf_infinite=yes],
-        [gl_cv_func_printf_infinite=no],
-        [
+    return 1;
+  return 0;
+}], [gl_cv_func_printf_infinite=yes], [gl_cv_func_printf_infinite=no],
+      [
 changequote(,)dnl
-         case "$host_os" in
-                                 # Guess yes on glibc systems.
-           *-gnu*)               gl_cv_func_printf_infinite="guessing yes";;
-                                 # Guess yes on FreeBSD >= 6.
-           freebsd[1-5].*)       gl_cv_func_printf_infinite="guessing no";;
-           freebsd* | kfreebsd*) gl_cv_func_printf_infinite="guessing yes";;
-                                 # Guess yes on Mac OS X >= 10.3.
-           darwin[1-6].*)        gl_cv_func_printf_infinite="guessing no";;
-           darwin*)              gl_cv_func_printf_infinite="guessing yes";;
-                                 # Guess yes on HP-UX >= 11.
-           hpux[7-9]* | hpux10*) gl_cv_func_printf_infinite="guessing no";;
-           hpux*)                gl_cv_func_printf_infinite="guessing yes";;
-                                 # Guess yes on NetBSD >= 3.
-           netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*)
-                                 gl_cv_func_printf_infinite="guessing no";;
-           netbsd*)              gl_cv_func_printf_infinite="guessing yes";;
-                                 # Guess yes on BeOS.
-           beos*)                gl_cv_func_printf_infinite="guessing yes";;
-                                 # If we don't know, assume the worst.
-           *)                    gl_cv_func_printf_infinite="guessing no";;
-         esac
+       case "$host_os" in
+                               # Guess yes on glibc systems.
+         *-gnu*)               gl_cv_func_printf_infinite="guessing yes";;
+                               # Guess yes on FreeBSD >= 6.
+         freebsd[1-5]*)        gl_cv_func_printf_infinite="guessing no";;
+         freebsd* | kfreebsd*) gl_cv_func_printf_infinite="guessing yes";;
+                               # Guess yes on MacOS X >= 10.3.
+         darwin[1-6].*)        gl_cv_func_printf_infinite="guessing no";;
+         darwin*)              gl_cv_func_printf_infinite="guessing yes";;
+                               # Guess yes on HP-UX >= 11.
+         hpux[7-9]* | hpux10*) gl_cv_func_printf_infinite="guessing no";;
+         hpux*)                gl_cv_func_printf_infinite="guessing yes";;
+                               # Guess yes on NetBSD >= 3.
+         netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*)
+                               gl_cv_func_printf_infinite="guessing no";;
+         netbsd*)              gl_cv_func_printf_infinite="guessing yes";;
+                               # Guess yes on BeOS.
+         beos*)                gl_cv_func_printf_infinite="guessing yes";;
+                               # If we don't know, assume the worst.
+         *)                    gl_cv_func_printf_infinite="guessing no";;
+       esac
 changequote([,])dnl
-        ])
+      ])
     ])
 ])
 
@@ -251,7 +239,6 @@ AC_DEFUN([gl_PRINTF_INFINITE_LONG_DOUBLE],
   AC_REQUIRE([gl_PRINTF_LONG_DOUBLE])
   AC_REQUIRE([AC_PROG_CC])
   AC_REQUIRE([gl_BIGENDIAN])
-  AC_REQUIRE([gl_LONG_DOUBLE_VS_DOUBLE])
   AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
   dnl The user can set or unset the variable gl_printf_safe to indicate
   dnl that he wishes a safe handling of non-IEEE-754 'long double' values.
@@ -265,8 +252,7 @@ AC_DEFUN([gl_PRINTF_INFINITE_LONG_DOUBLE],
       AC_CACHE_CHECK([whether printf supports infinite 'long double' arguments],
         [gl_cv_func_printf_infinite_long_double],
         [
-          AC_RUN_IFELSE(
-            [AC_LANG_SOURCE([[
+          AC_TRY_RUN([
 ]GL_NOCRASH[
 #include <float.h>
 #include <stdio.h>
@@ -293,42 +279,41 @@ static char buf[10000];
 static long double zeroL = 0.0L;
 int main ()
 {
-  int result = 0;
   nocrash_init();
-  if (sprintf (buf, "%Lf", 1.0L / zeroL) < 0
+  if (sprintf (buf, "%Lf", 1.0L / 0.0L) < 0
       || (strcmp (buf, "inf") != 0 && strcmp (buf, "infinity") != 0))
-    result |= 1;
-  if (sprintf (buf, "%Lf", -1.0L / zeroL) < 0
+    return 1;
+  if (sprintf (buf, "%Lf", -1.0L / 0.0L) < 0
       || (strcmp (buf, "-inf") != 0 && strcmp (buf, "-infinity") != 0))
-    result |= 1;
+    return 1;
   if (sprintf (buf, "%Lf", zeroL / zeroL) < 0
       || !strisnan (buf, 0, strlen (buf)))
-    result |= 1;
-  if (sprintf (buf, "%Le", 1.0L / zeroL) < 0
+    return 1;
+  if (sprintf (buf, "%Le", 1.0L / 0.0L) < 0
       || (strcmp (buf, "inf") != 0 && strcmp (buf, "infinity") != 0))
-    result |= 1;
-  if (sprintf (buf, "%Le", -1.0L / zeroL) < 0
+    return 1;
+  if (sprintf (buf, "%Le", -1.0L / 0.0L) < 0
       || (strcmp (buf, "-inf") != 0 && strcmp (buf, "-infinity") != 0))
-    result |= 1;
+    return 1;
   if (sprintf (buf, "%Le", zeroL / zeroL) < 0
       || !strisnan (buf, 0, strlen (buf)))
-    result |= 1;
-  if (sprintf (buf, "%Lg", 1.0L / zeroL) < 0
+    return 1;
+  if (sprintf (buf, "%Lg", 1.0L / 0.0L) < 0
       || (strcmp (buf, "inf") != 0 && strcmp (buf, "infinity") != 0))
-    result |= 1;
-  if (sprintf (buf, "%Lg", -1.0L / zeroL) < 0
+    return 1;
+  if (sprintf (buf, "%Lg", -1.0L / 0.0L) < 0
       || (strcmp (buf, "-inf") != 0 && strcmp (buf, "-infinity") != 0))
-    result |= 1;
+    return 1;
   if (sprintf (buf, "%Lg", zeroL / zeroL) < 0
       || !strisnan (buf, 0, strlen (buf)))
-    result |= 1;
-#if CHECK_PRINTF_SAFE && ((defined __ia64 && LDBL_MANT_DIG == 64) || (defined __x86_64__ || defined __amd64__) || (defined __i386 || defined __i386__ || defined _I386 || defined _M_IX86 || defined _X86_)) && !HAVE_SAME_LONG_DOUBLE_AS_DOUBLE
+    return 1;
+#if CHECK_PRINTF_SAFE && ((defined __ia64 && LDBL_MANT_DIG == 64) || (defined __x86_64__ || defined __amd64__) || (defined __i386 || defined __i386__ || defined _I386 || defined _M_IX86 || defined _X86_))
 /* Representation of an 80-bit 'long double' as an initializer for a sequence
    of 'unsigned int' words.  */
 # ifdef WORDS_BIGENDIAN
 #  define LDBL80_WORDS(exponent,manthi,mantlo) \
      { ((unsigned int) (exponent) << 16) | ((unsigned int) (manthi) >> 16), \
-       ((unsigned int) (manthi) << 16) | ((unsigned int) (mantlo) >> 16),   \
+       ((unsigned int) (manthi) << 16) | (unsigned int) (mantlo) >> 16),    \
        (unsigned int) (mantlo) << 16                                        \
      }
 # else
@@ -340,13 +325,13 @@ int main ()
       { LDBL80_WORDS (0xFFFF, 0xC3333333, 0x00000000) };
     if (sprintf (buf, "%Lf", x.value) < 0
         || !strisnan (buf, 0, strlen (buf)))
-      result |= 2;
+      return 1;
     if (sprintf (buf, "%Le", x.value) < 0
         || !strisnan (buf, 0, strlen (buf)))
-      result |= 2;
+      return 1;
     if (sprintf (buf, "%Lg", x.value) < 0
         || !strisnan (buf, 0, strlen (buf)))
-      result |= 2;
+      return 1;
   }
   {
     /* Signalling NaN.  */
@@ -354,91 +339,113 @@ int main ()
       { LDBL80_WORDS (0xFFFF, 0x83333333, 0x00000000) };
     if (sprintf (buf, "%Lf", x.value) < 0
         || !strisnan (buf, 0, strlen (buf)))
-      result |= 2;
+      return 1;
     if (sprintf (buf, "%Le", x.value) < 0
         || !strisnan (buf, 0, strlen (buf)))
-      result |= 2;
+      return 1;
     if (sprintf (buf, "%Lg", x.value) < 0
         || !strisnan (buf, 0, strlen (buf)))
-      result |= 2;
+      return 1;
   }
   { /* Pseudo-NaN.  */
     static union { unsigned int word[4]; long double value; } x =
       { LDBL80_WORDS (0xFFFF, 0x40000001, 0x00000000) };
-    if (sprintf (buf, "%Lf", x.value) <= 0)
-      result |= 4;
-    if (sprintf (buf, "%Le", x.value) <= 0)
-      result |= 4;
-    if (sprintf (buf, "%Lg", x.value) <= 0)
-      result |= 4;
+    if (sprintf (buf, "%Lf", x.value) < 0
+        || !strisnan (buf, 0, strlen (buf)))
+      return 1;
+    if (sprintf (buf, "%Le", x.value) < 0
+        || !strisnan (buf, 0, strlen (buf)))
+      return 1;
+    if (sprintf (buf, "%Lg", x.value) < 0
+        || !strisnan (buf, 0, strlen (buf)))
+      return 1;
   }
   { /* Pseudo-Infinity.  */
     static union { unsigned int word[4]; long double value; } x =
       { LDBL80_WORDS (0xFFFF, 0x00000000, 0x00000000) };
-    if (sprintf (buf, "%Lf", x.value) <= 0)
-      result |= 8;
-    if (sprintf (buf, "%Le", x.value) <= 0)
-      result |= 8;
-    if (sprintf (buf, "%Lg", x.value) <= 0)
-      result |= 8;
+    if (sprintf (buf, "%Lf", x.value) < 0
+        || !strisnan (buf, 0, strlen (buf)))
+      return 1;
+    if (sprintf (buf, "%Le", x.value) < 0
+        || !strisnan (buf, 0, strlen (buf)))
+      return 1;
+    if (sprintf (buf, "%Lg", x.value) < 0
+        || !strisnan (buf, 0, strlen (buf)))
+      return 1;
   }
   { /* Pseudo-Zero.  */
     static union { unsigned int word[4]; long double value; } x =
       { LDBL80_WORDS (0x4004, 0x00000000, 0x00000000) };
-    if (sprintf (buf, "%Lf", x.value) <= 0)
-      result |= 16;
-    if (sprintf (buf, "%Le", x.value) <= 0)
-      result |= 16;
-    if (sprintf (buf, "%Lg", x.value) <= 0)
-      result |= 16;
+    if (sprintf (buf, "%Lf", x.value) < 0
+        || !strisnan (buf, 0, strlen (buf)))
+      return 1;
+    if (sprintf (buf, "%Le", x.value) < 0
+        || !strisnan (buf, 0, strlen (buf)))
+      return 1;
+    if (sprintf (buf, "%Lg", x.value) < 0
+        || !strisnan (buf, 0, strlen (buf)))
+      return 1;
   }
   { /* Unnormalized number.  */
     static union { unsigned int word[4]; long double value; } x =
       { LDBL80_WORDS (0x4000, 0x63333333, 0x00000000) };
-    if (sprintf (buf, "%Lf", x.value) <= 0)
-      result |= 32;
-    if (sprintf (buf, "%Le", x.value) <= 0)
-      result |= 32;
-    if (sprintf (buf, "%Lg", x.value) <= 0)
-      result |= 32;
+    if (sprintf (buf, "%Lf", x.value) < 0
+        || !strisnan (buf, 0, strlen (buf)))
+      return 1;
+    if (sprintf (buf, "%Le", x.value) < 0
+        || !strisnan (buf, 0, strlen (buf)))
+      return 1;
+    if (sprintf (buf, "%Lg", x.value) < 0
+        || !strisnan (buf, 0, strlen (buf)))
+      return 1;
   }
   { /* Pseudo-Denormal.  */
     static union { unsigned int word[4]; long double value; } x =
       { LDBL80_WORDS (0x0000, 0x83333333, 0x00000000) };
-    if (sprintf (buf, "%Lf", x.value) <= 0)
-      result |= 64;
-    if (sprintf (buf, "%Le", x.value) <= 0)
-      result |= 64;
-    if (sprintf (buf, "%Lg", x.value) <= 0)
-      result |= 64;
+    if (sprintf (buf, "%Lf", x.value) < 0
+        || !strisnan (buf, 0, strlen (buf)))
+      return 1;
+    if (sprintf (buf, "%Le", x.value) < 0
+        || !strisnan (buf, 0, strlen (buf)))
+      return 1;
+    if (sprintf (buf, "%Lg", x.value) < 0
+        || !strisnan (buf, 0, strlen (buf)))
+      return 1;
   }
 #endif
-  return result;
-}]])],
-            [gl_cv_func_printf_infinite_long_double=yes],
-            [gl_cv_func_printf_infinite_long_double=no],
-            [
+  return 0;
+}],
+          [gl_cv_func_printf_infinite_long_double=yes],
+          [gl_cv_func_printf_infinite_long_double=no],
+          [
 changequote(,)dnl
-             case "$host_cpu" in
-                                     # Guess no on ia64, x86_64, i386.
-               ia64 | x86_64 | i*86) gl_cv_func_printf_infinite_long_double="guessing no";;
-               *)
-                 case "$host_os" in
-                                         # Guess yes on glibc systems.
-                   *-gnu*)               gl_cv_func_printf_infinite_long_double="guessing yes";;
-                                         # Guess yes on FreeBSD >= 6.
-                   freebsd[1-5].*)       gl_cv_func_printf_infinite_long_double="guessing no";;
-                   freebsd* | kfreebsd*) gl_cv_func_printf_infinite_long_double="guessing yes";;
-                                         # Guess yes on HP-UX >= 11.
-                   hpux[7-9]* | hpux10*) gl_cv_func_printf_infinite_long_double="guessing no";;
-                   hpux*)                gl_cv_func_printf_infinite_long_double="guessing yes";;
-                                         # If we don't know, assume the worst.
-                   *)                    gl_cv_func_printf_infinite_long_double="guessing no";;
-                 esac
-                 ;;
-             esac
+           case "$host_cpu" in
+                                   # Guess no on ia64, x86_64, i386.
+             ia64 | x86_64 | i*86) gl_cv_func_printf_infinite_long_double="guessing no";;
+             *)
+               case "$host_os" in
+                                       # Guess yes on glibc systems.
+                 *-gnu*)               gl_cv_func_printf_infinite_long_double="guessing yes";;
+                                       # Guess yes on FreeBSD >= 6.
+                 freebsd[1-5]*)        gl_cv_func_printf_infinite_long_double="guessing no";;
+                 freebsd* | kfreebsd*) gl_cv_func_printf_infinite_long_double="guessing yes";;
+                                       # Guess yes on MacOS X >= 10.3.
+                 darwin[1-6].*)        gl_cv_func_printf_infinite_long_double="guessing no";;
+                 darwin*)              gl_cv_func_printf_infinite_long_double="guessing yes";;
+                                       # Guess yes on HP-UX >= 11.
+                 hpux[7-9]* | hpux10*) gl_cv_func_printf_infinite_long_double="guessing no";;
+                 hpux*)                gl_cv_func_printf_infinite_long_double="guessing yes";;
+                                       # Guess yes on NetBSD >= 3.
+                 netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*)
+                                       gl_cv_func_printf_infinite_long_double="guessing no";;
+                 netbsd*)              gl_cv_func_printf_infinite_long_double="guessing yes";;
+                                       # If we don't know, assume the worst.
+                 *)                    gl_cv_func_printf_infinite_long_double="guessing no";;
+               esac
+               ;;
+           esac
 changequote([,])dnl
-            ])
+          ])
         ])
       ;;
     *)
@@ -459,77 +466,72 @@ AC_DEFUN([gl_PRINTF_DIRECTIVE_A],
   AC_CACHE_CHECK([whether printf supports the 'a' and 'A' directives],
     [gl_cv_func_printf_directive_a],
     [
-      AC_RUN_IFELSE(
-        [AC_LANG_SOURCE([[
+      AC_TRY_RUN([
 #include <stdio.h>
 #include <string.h>
 static char buf[100];
-static double zero = 0.0;
 int main ()
 {
-  int result = 0;
   if (sprintf (buf, "%a %d", 3.1416015625, 33, 44, 55) < 0
       || (strcmp (buf, "0x1.922p+1 33") != 0
           && strcmp (buf, "0x3.244p+0 33") != 0
           && strcmp (buf, "0x6.488p-1 33") != 0
           && strcmp (buf, "0xc.91p-2 33") != 0))
-    result |= 1;
+    return 1;
   if (sprintf (buf, "%A %d", -3.1416015625, 33, 44, 55) < 0
       || (strcmp (buf, "-0X1.922P+1 33") != 0
           && strcmp (buf, "-0X3.244P+0 33") != 0
           && strcmp (buf, "-0X6.488P-1 33") != 0
           && strcmp (buf, "-0XC.91P-2 33") != 0))
-    result |= 2;
+    return 1;
   /* This catches a FreeBSD 6.1 bug: it doesn't round.  */
   if (sprintf (buf, "%.2a %d", 1.51, 33, 44, 55) < 0
       || (strcmp (buf, "0x1.83p+0 33") != 0
           && strcmp (buf, "0x3.05p-1 33") != 0
           && strcmp (buf, "0x6.0ap-2 33") != 0
           && strcmp (buf, "0xc.14p-3 33") != 0))
-    result |= 4;
+    return 1;
   /* This catches a FreeBSD 6.1 bug.  See
      <http://lists.gnu.org/archive/html/bug-gnulib/2007-04/msg00107.html> */
-  if (sprintf (buf, "%010a %d", 1.0 / zero, 33, 44, 55) < 0
+  if (sprintf (buf, "%010a %d", 1.0 / 0.0, 33, 44, 55) < 0
       || buf[0] == '0')
-    result |= 8;
-  /* This catches a Mac OS X 10.3.9 (Darwin 7.9) bug.  */
+    return 1;
+  /* This catches a MacOS X 10.3.9 (Darwin 7.9) bug.  */
   if (sprintf (buf, "%.1a", 1.999) < 0
       || (strcmp (buf, "0x1.0p+1") != 0
           && strcmp (buf, "0x2.0p+0") != 0
           && strcmp (buf, "0x4.0p-1") != 0
           && strcmp (buf, "0x8.0p-2") != 0))
-    result |= 16;
-  /* This catches the same Mac OS X 10.3.9 (Darwin 7.9) bug and also a
+    return 1;
+  /* This catches the same MacOS X 10.3.9 (Darwin 7.9) bug and also a
      glibc 2.4 bug <http://sourceware.org/bugzilla/show_bug.cgi?id=2908>.  */
   if (sprintf (buf, "%.1La", 1.999L) < 0
       || (strcmp (buf, "0x1.0p+1") != 0
           && strcmp (buf, "0x2.0p+0") != 0
           && strcmp (buf, "0x4.0p-1") != 0
           && strcmp (buf, "0x8.0p-2") != 0))
-    result |= 32;
-  return result;
-}]])],
-        [gl_cv_func_printf_directive_a=yes],
-        [gl_cv_func_printf_directive_a=no],
-        [
-         case "$host_os" in
-                                 # Guess yes on glibc >= 2.5 systems.
-           *-gnu*)
-             AC_EGREP_CPP([BZ2908], [
-               #include <features.h>
-               #ifdef __GNU_LIBRARY__
-                #if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 5) || (__GLIBC__ > 2)) && !defined __UCLIBC__
-                 BZ2908
-                #endif
-               #endif
-               ],
-               [gl_cv_func_printf_directive_a="guessing yes"],
-               [gl_cv_func_printf_directive_a="guessing no"])
-             ;;
-                                 # If we don't know, assume the worst.
-           *)                    gl_cv_func_printf_directive_a="guessing no";;
-         esac
-        ])
+    return 1;
+  return 0;
+}], [gl_cv_func_printf_directive_a=yes], [gl_cv_func_printf_directive_a=no],
+      [
+       case "$host_os" in
+                               # Guess yes on glibc >= 2.5 systems.
+         *-gnu*)
+           AC_EGREP_CPP([BZ2908], [
+             #include <features.h>
+             #ifdef __GNU_LIBRARY__
+              #if (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 5) || (__GLIBC__ > 2)
+               BZ2908
+              #endif
+             #endif
+             ],
+             [gl_cv_func_printf_directive_a="guessing yes"],
+             [gl_cv_func_printf_directive_a="guessing no"])
+           ;;
+                               # If we don't know, assume the worst.
+         *)                    gl_cv_func_printf_directive_a="guessing no";;
+       esac
+      ])
     ])
 ])
 
@@ -544,48 +546,43 @@ AC_DEFUN([gl_PRINTF_DIRECTIVE_F],
   AC_CACHE_CHECK([whether printf supports the 'F' directive],
     [gl_cv_func_printf_directive_f],
     [
-      AC_RUN_IFELSE(
-        [AC_LANG_SOURCE([[
+      AC_TRY_RUN([
 #include <stdio.h>
 #include <string.h>
 static char buf[100];
-static double zero = 0.0;
 int main ()
 {
-  int result = 0;
   if (sprintf (buf, "%F %d", 1234567.0, 33, 44, 55) < 0
       || strcmp (buf, "1234567.000000 33") != 0)
-    result |= 1;
-  if (sprintf (buf, "%F", 1.0 / zero) < 0
+    return 1;
+  if (sprintf (buf, "%F", 1.0 / 0.0) < 0
       || (strcmp (buf, "INF") != 0 && strcmp (buf, "INFINITY") != 0))
-    result |= 2;
+    return 1;
   /* This catches a Cygwin 1.5.x bug.  */
   if (sprintf (buf, "%.F", 1234.0) < 0
       || strcmp (buf, "1234") != 0)
-    result |= 4;
-  return result;
-}]])],
-        [gl_cv_func_printf_directive_f=yes],
-        [gl_cv_func_printf_directive_f=no],
-        [
+    return 1;
+  return 0;
+}], [gl_cv_func_printf_directive_f=yes], [gl_cv_func_printf_directive_f=no],
+      [
 changequote(,)dnl
-         case "$host_os" in
-                                 # Guess yes on glibc systems.
-           *-gnu*)               gl_cv_func_printf_directive_f="guessing yes";;
-                                 # Guess yes on FreeBSD >= 6.
-           freebsd[1-5].*)       gl_cv_func_printf_directive_f="guessing no";;
-           freebsd* | kfreebsd*) gl_cv_func_printf_directive_f="guessing yes";;
-                                 # Guess yes on Mac OS X >= 10.3.
-           darwin[1-6].*)        gl_cv_func_printf_directive_f="guessing no";;
-           darwin*)              gl_cv_func_printf_directive_f="guessing yes";;
-                                 # Guess yes on Solaris >= 2.10.
-           solaris2.[1-9][0-9]*) gl_cv_func_printf_sizes_c99="guessing yes";;
-           solaris*)             gl_cv_func_printf_sizes_c99="guessing no";;
-                                 # If we don't know, assume the worst.
-           *)                    gl_cv_func_printf_directive_f="guessing no";;
-         esac
+       case "$host_os" in
+                               # Guess yes on glibc systems.
+         *-gnu*)               gl_cv_func_printf_directive_f="guessing yes";;
+                               # Guess yes on FreeBSD >= 6.
+         freebsd[1-5]*)        gl_cv_func_printf_directive_f="guessing no";;
+         freebsd* | kfreebsd*) gl_cv_func_printf_directive_f="guessing yes";;
+                               # Guess yes on MacOS X >= 10.3.
+         darwin[1-6].*)        gl_cv_func_printf_directive_f="guessing no";;
+         darwin*)              gl_cv_func_printf_directive_f="guessing yes";;
+                               # Guess yes on Solaris >= 2.10.
+         solaris2.[0-9]*)      gl_cv_func_printf_directive_f="guessing no";;
+         solaris*)             gl_cv_func_printf_directive_f="guessing yes";;
+                               # If we don't know, assume the worst.
+         *)                    gl_cv_func_printf_directive_f="guessing no";;
+       esac
 changequote([,])dnl
-        ])
+      ])
     ])
 ])
 
@@ -600,30 +597,14 @@ AC_DEFUN([gl_PRINTF_DIRECTIVE_N],
   AC_CACHE_CHECK([whether printf supports the 'n' directive],
     [gl_cv_func_printf_directive_n],
     [
-      AC_RUN_IFELSE(
-        [AC_LANG_SOURCE([[
+      AC_TRY_RUN([
 #include <stdio.h>
-#include <stdlib.h>
 #include <string.h>
-#ifdef _MSC_VER
-/* See page about "Parameter Validation" on msdn.microsoft.com.  */
-static void cdecl
-invalid_parameter_handler (const wchar_t *expression,
-                           const wchar_t *function,
-                           const wchar_t *file, unsigned int line,
-                           uintptr_t dummy)
-{
-  exit (1);
-}
-#endif
 static char fmtstring[10];
 static char buf[100];
 int main ()
 {
   int count = -1;
-#ifdef _MSC_VER
-  _set_invalid_parameter_handler (invalid_parameter_handler);
-#endif
   /* Copy the format string.  Some systems (glibc with _FORTIFY_SOURCE=2)
      support %n in format strings in read-only memory but not in writable
      memory.  */
@@ -633,17 +614,14 @@ int main ()
       || count != 4)
     return 1;
   return 0;
-}]])],
-        [gl_cv_func_printf_directive_n=yes],
-        [gl_cv_func_printf_directive_n=no],
-        [
+}], [gl_cv_func_printf_directive_n=yes], [gl_cv_func_printf_directive_n=no],
+      [
 changequote(,)dnl
-         case "$host_os" in
-           mingw*) gl_cv_func_printf_directive_n="guessing no";;
-           *)      gl_cv_func_printf_directive_n="guessing yes";;
-         esac
+       case "$host_os" in
+         *)     gl_cv_func_printf_directive_n="guessing yes";;
+       esac
 changequote([,])dnl
-        ])
+      ])
     ])
 ])
 
@@ -661,8 +639,7 @@ AC_DEFUN([gl_PRINTF_DIRECTIVE_LS],
   AC_CACHE_CHECK([whether printf supports the 'ls' directive],
     [gl_cv_func_printf_directive_ls],
     [
-      AC_RUN_IFELSE(
-        [AC_LANG_SOURCE([[
+      AC_TRY_RUN([
 /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
    <wchar.h>.
    BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
@@ -674,7 +651,6 @@ AC_DEFUN([gl_PRINTF_DIRECTIVE_LS],
 #include <string.h>
 int main ()
 {
-  int result = 0;
   char buf[100];
   /* Test whether %ls works at all.
      This test fails on OpenBSD 4.0, IRIX 6.5, Solaris 2.6, Haiku, but not on
@@ -684,7 +660,7 @@ int main ()
     buf[0] = '\0';
     if (sprintf (buf, "%ls", wstring) < 0
         || strcmp (buf, "abc") != 0)
-      result |= 1;
+      return 1;
   }
   /* This test fails on IRIX 6.5, Solaris 2.6, Cygwin 1.5, Haiku (with an
      assertion failure inside libc), but not on OpenBSD 4.0.  */
@@ -693,7 +669,7 @@ int main ()
     buf[0] = '\0';
     if (sprintf (buf, "%ls", wstring) < 0
         || strcmp (buf, "a") != 0)
-      result |= 2;
+      return 1;
   }
   /* Test whether precisions in %ls are supported as specified in ISO C 99
      section 7.19.6.1:
@@ -708,24 +684,22 @@ int main ()
     buf[0] = '\0';
     if (sprintf (buf, "%.2ls", wstring) < 0
         || strcmp (buf, "ab") != 0)
-      result |= 8;
+      return 1;
   }
-  return result;
-}]])],
-        [gl_cv_func_printf_directive_ls=yes],
-        [gl_cv_func_printf_directive_ls=no],
-        [
+  return 0;
+}], [gl_cv_func_printf_directive_ls=yes], [gl_cv_func_printf_directive_ls=no],
+      [
 changequote(,)dnl
-         case "$host_os" in
-           openbsd*)        gl_cv_func_printf_directive_ls="guessing no";;
-           irix*)           gl_cv_func_printf_directive_ls="guessing no";;
-           solaris*)        gl_cv_func_printf_directive_ls="guessing no";;
-           cygwin*)         gl_cv_func_printf_directive_ls="guessing no";;
-           beos* | haiku*)  gl_cv_func_printf_directive_ls="guessing no";;
-           *)               gl_cv_func_printf_directive_ls="guessing yes";;
-         esac
+       case "$host_os" in
+         openbsd*)        gl_cv_func_printf_directive_ls="guessing no";;
+         irix*)           gl_cv_func_printf_directive_ls="guessing no";;
+         solaris*)        gl_cv_func_printf_directive_ls="guessing no";;
+         cygwin*)         gl_cv_func_printf_directive_ls="guessing no";;
+         beos* | haiku*)  gl_cv_func_printf_directive_ls="guessing no";;
+         *)               gl_cv_func_printf_directive_ls="guessing yes";;
+       esac
 changequote([,])dnl
-        ])
+      ])
     ])
 ])
 
@@ -740,8 +714,7 @@ AC_DEFUN([gl_PRINTF_POSITIONS],
   AC_CACHE_CHECK([whether printf supports POSIX/XSI format strings with positions],
     [gl_cv_func_printf_positions],
     [
-      AC_RUN_IFELSE(
-        [AC_LANG_SOURCE([[
+      AC_TRY_RUN([
 #include <stdio.h>
 #include <string.h>
 /* The string "%2$d %1$d", with dollar characters protected from the shell's
@@ -752,20 +725,18 @@ int main ()
 {
   sprintf (buf, format, 33, 55);
   return (strcmp (buf, "55 33") != 0);
-}]])],
-        [gl_cv_func_printf_positions=yes],
-        [gl_cv_func_printf_positions=no],
-        [
+}], [gl_cv_func_printf_positions=yes], [gl_cv_func_printf_positions=no],
+      [
 changequote(,)dnl
-         case "$host_os" in
-           netbsd[1-3]* | netbsdelf[1-3]* | netbsdaout[1-3]* | netbsdcoff[1-3]*)
-                         gl_cv_func_printf_positions="guessing no";;
-           beos*)        gl_cv_func_printf_positions="guessing no";;
-           mingw* | pw*) gl_cv_func_printf_positions="guessing no";;
-           *)            gl_cv_func_printf_positions="guessing yes";;
-         esac
+       case "$host_os" in
+         netbsd[1-3]* | netbsdelf[1-3]* | netbsdaout[1-3]* | netbsdcoff[1-3]*)
+                       gl_cv_func_printf_positions="guessing no";;
+         beos*)        gl_cv_func_printf_positions="guessing no";;
+         mingw* | pw*) gl_cv_func_printf_positions="guessing no";;
+         *)            gl_cv_func_printf_positions="guessing yes";;
+       esac
 changequote([,])dnl
-        ])
+      ])
     ])
 ])
 
@@ -780,8 +751,7 @@ AC_DEFUN([gl_PRINTF_FLAG_GROUPING],
   AC_CACHE_CHECK([whether printf supports the grouping flag],
     [gl_cv_func_printf_flag_grouping],
     [
-      AC_RUN_IFELSE(
-        [AC_LANG_SOURCE([[
+      AC_TRY_RUN([
 #include <stdio.h>
 #include <string.h>
 static char buf[100];
@@ -791,19 +761,17 @@ int main ()
       || buf[strlen (buf) - 1] != '9')
     return 1;
   return 0;
-}]])],
-        [gl_cv_func_printf_flag_grouping=yes],
-        [gl_cv_func_printf_flag_grouping=no],
-        [
+}], [gl_cv_func_printf_flag_grouping=yes], [gl_cv_func_printf_flag_grouping=no],
+      [
 changequote(,)dnl
-         case "$host_os" in
-           cygwin*)      gl_cv_func_printf_flag_grouping="guessing no";;
-           netbsd*)      gl_cv_func_printf_flag_grouping="guessing no";;
-           mingw* | pw*) gl_cv_func_printf_flag_grouping="guessing no";;
-           *)            gl_cv_func_printf_flag_grouping="guessing yes";;
-         esac
+       case "$host_os" in
+         cygwin*)      gl_cv_func_printf_flag_grouping="guessing no";;
+         netbsd*)      gl_cv_func_printf_flag_grouping="guessing no";;
+         mingw* | pw*) gl_cv_func_printf_flag_grouping="guessing no";;
+         *)            gl_cv_func_printf_flag_grouping="guessing yes";;
+       esac
 changequote([,])dnl
-        ])
+      ])
     ])
 ])
 
@@ -819,8 +787,7 @@ AC_DEFUN([gl_PRINTF_FLAG_LEFTADJUST],
   AC_CACHE_CHECK([whether printf supports the left-adjust flag correctly],
     [gl_cv_func_printf_flag_leftadjust],
     [
-      AC_RUN_IFELSE(
-        [AC_LANG_SOURCE([[
+      AC_TRY_RUN([
 #include <stdio.h>
 #include <string.h>
 static char buf[100];
@@ -831,7 +798,7 @@ int main ()
       || strcmp (buf, "ab  c") != 0)
     return 1;
   return 0;
-}]])],
+}],
         [gl_cv_func_printf_flag_leftadjust=yes],
         [gl_cv_func_printf_flag_leftadjust=no],
         [
@@ -861,44 +828,37 @@ AC_DEFUN([gl_PRINTF_FLAG_ZERO],
   AC_CACHE_CHECK([whether printf supports the zero flag correctly],
     [gl_cv_func_printf_flag_zero],
     [
-      AC_RUN_IFELSE(
-        [AC_LANG_SOURCE([[
+      AC_TRY_RUN([
 #include <stdio.h>
 #include <string.h>
 static char buf[100];
-static double zero = 0.0;
 int main ()
 {
-  if (sprintf (buf, "%010f", 1.0 / zero, 33, 44, 55) < 0
+  if (sprintf (buf, "%010f", 1.0 / 0.0, 33, 44, 55) < 0
       || (strcmp (buf, "       inf") != 0
           && strcmp (buf, "  infinity") != 0))
     return 1;
   return 0;
-}]])],
-        [gl_cv_func_printf_flag_zero=yes],
-        [gl_cv_func_printf_flag_zero=no],
-        [
+}], [gl_cv_func_printf_flag_zero=yes], [gl_cv_func_printf_flag_zero=no],
+      [
 changequote(,)dnl
-         case "$host_os" in
-                   # Guess yes on glibc systems.
-           *-gnu*) gl_cv_func_printf_flag_zero="guessing yes";;
-                   # Guess yes on BeOS.
-           beos*)  gl_cv_func_printf_flag_zero="guessing yes";;
-                   # If we don't know, assume the worst.
-           *)      gl_cv_func_printf_flag_zero="guessing no";;
-         esac
+       case "$host_os" in
+                 # Guess yes on glibc systems.
+         *-gnu*) gl_cv_func_printf_flag_zero="guessing yes";;
+                 # Guess yes on BeOS.
+         beos*)  gl_cv_func_printf_flag_zero="guessing yes";;
+                 # If we don't know, assume the worst.
+         *)      gl_cv_func_printf_flag_zero="guessing no";;
+       esac
 changequote([,])dnl
-        ])
+      ])
     ])
 ])
 
 dnl Test whether the *printf family of functions supports large precisions.
 dnl On mingw, precisions larger than 512 are treated like 512, in integer,
-dnl floating-point or pointer output. On Solaris 10/x86, precisions larger
-dnl than 510 in floating-point output crash the program. On Solaris 10/SPARC,
-dnl precisions larger than 510 in floating-point output yield wrong results.
-dnl On AIX 7.1, precisions larger than 998 in floating-point output yield
-dnl wrong results. On BeOS, precisions larger than 1044 crash the program.
+dnl floating-point or pointer output. On BeOS, precisions larger than 1044
+dnl crash the program.
 dnl Result is gl_cv_func_printf_precision.
 
 AC_DEFUN([gl_PRINTF_PRECISION],
@@ -908,43 +868,30 @@ AC_DEFUN([gl_PRINTF_PRECISION],
   AC_CACHE_CHECK([whether printf supports large precisions],
     [gl_cv_func_printf_precision],
     [
-      AC_RUN_IFELSE(
-        [AC_LANG_SOURCE([[
+      AC_TRY_RUN([
 #include <stdio.h>
 #include <string.h>
 static char buf[5000];
 int main ()
 {
-  int result = 0;
 #ifdef __BEOS__
   /* On BeOS, this would crash and show a dialog box.  Avoid the crash.  */
   return 1;
 #endif
   if (sprintf (buf, "%.4000d %d", 1, 33, 44) < 4000 + 3)
-    result |= 1;
-  if (sprintf (buf, "%.4000f %d", 1.0, 33, 44) < 4000 + 5)
-    result |= 2;
-  if (sprintf (buf, "%.511f %d", 1.0, 33, 44) < 511 + 5
-      || buf[0] != '1')
-    result |= 4;
-  if (sprintf (buf, "%.999f %d", 1.0, 33, 44) < 999 + 5
-      || buf[0] != '1')
-    result |= 4;
-  return result;
-}]])],
-        [gl_cv_func_printf_precision=yes],
-        [gl_cv_func_printf_precision=no],
-        [
+    return 1;
+  return 0;
+}], [gl_cv_func_printf_precision=yes], [gl_cv_func_printf_precision=no],
+      [
 changequote(,)dnl
-         case "$host_os" in
-           # Guess no only on Solaris, native Windows, and BeOS systems.
-           solaris*)     gl_cv_func_printf_precision="guessing no" ;;
-           mingw* | pw*) gl_cv_func_printf_precision="guessing no" ;;
-           beos*)        gl_cv_func_printf_precision="guessing no" ;;
-           *)            gl_cv_func_printf_precision="guessing yes" ;;
-         esac
+       case "$host_os" in
+         # Guess no only on native Win32 and BeOS systems.
+         mingw* | pw*) gl_cv_func_printf_precision="guessing no" ;;
+         beos*)        gl_cv_func_printf_precision="guessing no" ;;
+         *)            gl_cv_func_printf_precision="guessing yes" ;;
+       esac
 changequote([,])dnl
-        ])
+      ])
     ])
 ])
 
@@ -1013,9 +960,8 @@ int main()
 changequote([,])dnl
           ])])
           if AC_TRY_EVAL([ac_link]) && test -s conftest$ac_exeext; then
-            (./conftest 2>&AS_MESSAGE_LOG_FD
+            (./conftest
              result=$?
-             _AS_ECHO_LOG([\$? = $result])
              if test $result != 0 && test $result != 77; then result=1; fi
              exit $result
             ) >/dev/null 2>/dev/null
@@ -1029,7 +975,7 @@ changequote([,])dnl
           fi
           rm -fr conftest*
         else
-          dnl A universal build on Apple Mac OS X platforms.
+          dnl A universal build on Apple MacOS X platforms.
           dnl The result would be 'no' in 32-bit mode and 'yes' in 64-bit mode.
           dnl But we need a configuration result that is valid in both modes.
           gl_cv_func_printf_enomem="guessing no"
@@ -1082,80 +1028,61 @@ AC_DEFUN([gl_SNPRINTF_TRUNCATION_C99],
 [
   AC_REQUIRE([AC_PROG_CC])
   AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
-  AC_REQUIRE([gl_SNPRINTF_PRESENCE])
   AC_CACHE_CHECK([whether snprintf truncates the result as in C99],
     [gl_cv_func_snprintf_truncation_c99],
     [
-      AC_RUN_IFELSE(
-        [AC_LANG_SOURCE([[
+      AC_TRY_RUN([
 #include <stdio.h>
 #include <string.h>
-#if HAVE_SNPRINTF
-# define my_snprintf snprintf
-#else
-# include <stdarg.h>
-static int my_snprintf (char *buf, int size, const char *format, ...)
-{
-  va_list args;
-  int ret;
-  va_start (args, format);
-  ret = vsnprintf (buf, size, format, args);
-  va_end (args);
-  return ret;
-}
-#endif
 static char buf[100];
 int main ()
 {
   strcpy (buf, "ABCDEF");
-  my_snprintf (buf, 3, "%d %d", 4567, 89);
+  snprintf (buf, 3, "%d %d", 4567, 89);
   if (memcmp (buf, "45\0DEF", 6) != 0)
     return 1;
   return 0;
-}]])],
-        [gl_cv_func_snprintf_truncation_c99=yes],
-        [gl_cv_func_snprintf_truncation_c99=no],
-        [
+}], [gl_cv_func_snprintf_truncation_c99=yes], [gl_cv_func_snprintf_truncation_c99=no],
+      [
 changequote(,)dnl
-         case "$host_os" in
-                                 # Guess yes on glibc systems.
-           *-gnu*)               gl_cv_func_snprintf_truncation_c99="guessing yes";;
-                                 # Guess yes on FreeBSD >= 5.
-           freebsd[1-4].*)       gl_cv_func_snprintf_truncation_c99="guessing no";;
-           freebsd* | kfreebsd*) gl_cv_func_snprintf_truncation_c99="guessing yes";;
-                                 # Guess yes on Mac OS X >= 10.3.
-           darwin[1-6].*)        gl_cv_func_snprintf_truncation_c99="guessing no";;
-           darwin*)              gl_cv_func_snprintf_truncation_c99="guessing yes";;
-                                 # Guess yes on OpenBSD >= 3.9.
-           openbsd[1-2].* | openbsd3.[0-8] | openbsd3.[0-8].*)
-                                 gl_cv_func_snprintf_truncation_c99="guessing no";;
-           openbsd*)             gl_cv_func_snprintf_truncation_c99="guessing yes";;
-                                 # Guess yes on Solaris >= 2.6.
-           solaris2.[0-5] | solaris2.[0-5].*)
-                                 gl_cv_func_snprintf_truncation_c99="guessing no";;
-           solaris*)             gl_cv_func_snprintf_truncation_c99="guessing yes";;
-                                 # Guess yes on AIX >= 4.
-           aix[1-3]*)            gl_cv_func_snprintf_truncation_c99="guessing no";;
-           aix*)                 gl_cv_func_snprintf_truncation_c99="guessing yes";;
-                                 # Guess yes on HP-UX >= 11.
-           hpux[7-9]* | hpux10*) gl_cv_func_snprintf_truncation_c99="guessing no";;
-           hpux*)                gl_cv_func_snprintf_truncation_c99="guessing yes";;
-                                 # Guess yes on IRIX >= 6.5.
-           irix6.5)              gl_cv_func_snprintf_truncation_c99="guessing yes";;
-                                 # Guess yes on OSF/1 >= 5.
-           osf[3-4]*)            gl_cv_func_snprintf_truncation_c99="guessing no";;
-           osf*)                 gl_cv_func_snprintf_truncation_c99="guessing yes";;
-                                 # Guess yes on NetBSD >= 3.
-           netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*)
-                                 gl_cv_func_snprintf_truncation_c99="guessing no";;
-           netbsd*)              gl_cv_func_snprintf_truncation_c99="guessing yes";;
-                                 # Guess yes on BeOS.
-           beos*)                gl_cv_func_snprintf_truncation_c99="guessing yes";;
-                                 # If we don't know, assume the worst.
-           *)                    gl_cv_func_snprintf_truncation_c99="guessing no";;
-         esac
+       case "$host_os" in
+                               # Guess yes on glibc systems.
+         *-gnu*)               gl_cv_func_snprintf_truncation_c99="guessing yes";;
+                               # Guess yes on FreeBSD >= 5.
+         freebsd[1-4]*)        gl_cv_func_snprintf_truncation_c99="guessing no";;
+         freebsd* | kfreebsd*) gl_cv_func_snprintf_truncation_c99="guessing yes";;
+                               # Guess yes on MacOS X >= 10.3.
+         darwin[1-6].*)        gl_cv_func_snprintf_truncation_c99="guessing no";;
+         darwin*)              gl_cv_func_snprintf_truncation_c99="guessing yes";;
+                               # Guess yes on OpenBSD >= 3.9.
+         openbsd[1-2].* | openbsd3.[0-8] | openbsd3.[0-8].*)
+                               gl_cv_func_snprintf_truncation_c99="guessing no";;
+         openbsd*)             gl_cv_func_snprintf_truncation_c99="guessing yes";;
+                               # Guess yes on Solaris >= 2.6.
+         solaris2.[0-5]*)      gl_cv_func_snprintf_truncation_c99="guessing no";;
+         solaris*)             gl_cv_func_snprintf_truncation_c99="guessing yes";;
+                               # Guess yes on AIX >= 4.
+         aix[1-3]*)            gl_cv_func_snprintf_truncation_c99="guessing no";;
+         aix*)                 gl_cv_func_snprintf_truncation_c99="guessing yes";;
+                               # Guess yes on HP-UX >= 11.
+         hpux[7-9]* | hpux10*) gl_cv_func_snprintf_truncation_c99="guessing no";;
+         hpux*)                gl_cv_func_snprintf_truncation_c99="guessing yes";;
+                               # Guess yes on IRIX >= 6.5.
+         irix6.5)              gl_cv_func_snprintf_truncation_c99="guessing yes";;
+                               # Guess yes on OSF/1 >= 5.
+         osf[3-4]*)            gl_cv_func_snprintf_truncation_c99="guessing no";;
+         osf*)                 gl_cv_func_snprintf_truncation_c99="guessing yes";;
+                               # Guess yes on NetBSD >= 3.
+         netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*)
+                               gl_cv_func_snprintf_truncation_c99="guessing no";;
+         netbsd*)              gl_cv_func_snprintf_truncation_c99="guessing yes";;
+                               # Guess yes on BeOS.
+         beos*)                gl_cv_func_snprintf_truncation_c99="guessing yes";;
+                               # If we don't know, assume the worst.
+         *)                    gl_cv_func_snprintf_truncation_c99="guessing no";;
+       esac
 changequote([,])dnl
-        ])
+      ])
     ])
 ])
 
@@ -1174,78 +1101,56 @@ dnl     }
 dnl     ---------------------------------------------------------------------
 dnl Result is gl_cv_func_snprintf_retval_c99.
 
-AC_DEFUN_ONCE([gl_SNPRINTF_RETVAL_C99],
+AC_DEFUN([gl_SNPRINTF_RETVAL_C99],
 [
   AC_REQUIRE([AC_PROG_CC])
   AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
-  AC_REQUIRE([gl_SNPRINTF_PRESENCE])
   AC_CACHE_CHECK([whether snprintf returns a byte count as in C99],
     [gl_cv_func_snprintf_retval_c99],
     [
-      AC_RUN_IFELSE(
-        [AC_LANG_SOURCE([[
+      AC_TRY_RUN([
 #include <stdio.h>
 #include <string.h>
-#if HAVE_SNPRINTF
-# define my_snprintf snprintf
-#else
-# include <stdarg.h>
-static int my_snprintf (char *buf, int size, const char *format, ...)
-{
-  va_list args;
-  int ret;
-  va_start (args, format);
-  ret = vsnprintf (buf, size, format, args);
-  va_end (args);
-  return ret;
-}
-#endif
 static char buf[100];
 int main ()
 {
   strcpy (buf, "ABCDEF");
-  if (my_snprintf (buf, 3, "%d %d", 4567, 89) != 7)
+  if (snprintf (buf, 3, "%d %d", 4567, 89) != 7)
     return 1;
-  if (my_snprintf (buf, 0, "%d %d", 4567, 89) != 7)
-    return 2;
-  if (my_snprintf (NULL, 0, "%d %d", 4567, 89) != 7)
-    return 3;
   return 0;
-}]])],
-        [gl_cv_func_snprintf_retval_c99=yes],
-        [gl_cv_func_snprintf_retval_c99=no],
-        [
+}], [gl_cv_func_snprintf_retval_c99=yes], [gl_cv_func_snprintf_retval_c99=no],
+      [
 changequote(,)dnl
-         case "$host_os" in
-                                 # Guess yes on glibc systems.
-           *-gnu*)               gl_cv_func_snprintf_retval_c99="guessing yes";;
-                                 # Guess yes on FreeBSD >= 5.
-           freebsd[1-4].*)       gl_cv_func_snprintf_retval_c99="guessing no";;
-           freebsd* | kfreebsd*) gl_cv_func_snprintf_retval_c99="guessing yes";;
-                                 # Guess yes on Mac OS X >= 10.3.
-           darwin[1-6].*)        gl_cv_func_snprintf_retval_c99="guessing no";;
-           darwin*)              gl_cv_func_snprintf_retval_c99="guessing yes";;
-                                 # Guess yes on OpenBSD >= 3.9.
-           openbsd[1-2].* | openbsd3.[0-8] | openbsd3.[0-8].*)
-                                 gl_cv_func_snprintf_retval_c99="guessing no";;
-           openbsd*)             gl_cv_func_snprintf_retval_c99="guessing yes";;
-                                 # Guess yes on Solaris >= 2.10.
-           solaris2.[1-9][0-9]*) gl_cv_func_printf_sizes_c99="guessing yes";;
-           solaris*)             gl_cv_func_printf_sizes_c99="guessing no";;
-                                 # Guess yes on AIX >= 4.
-           aix[1-3]*)            gl_cv_func_snprintf_retval_c99="guessing no";;
-           aix*)                 gl_cv_func_snprintf_retval_c99="guessing yes";;
-                                 # Guess yes on NetBSD >= 3.
-           netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*)
-                                 gl_cv_func_snprintf_retval_c99="guessing no";;
-           netbsd*)              gl_cv_func_snprintf_retval_c99="guessing yes";;
-                                 # Guess yes on BeOS.
-           beos*)                gl_cv_func_snprintf_retval_c99="guessing yes";;
-                                 # If we don't know, assume the worst.
-           *)                    gl_cv_func_snprintf_retval_c99="guessing no";;
-         esac
+       case "$host_os" in
+                               # Guess yes on glibc systems.
+         *-gnu*)               gl_cv_func_snprintf_retval_c99="guessing yes";;
+                               # Guess yes on FreeBSD >= 5.
+         freebsd[1-4]*)        gl_cv_func_snprintf_retval_c99="guessing no";;
+         freebsd* | kfreebsd*) gl_cv_func_snprintf_retval_c99="guessing yes";;
+                               # Guess yes on MacOS X >= 10.3.
+         darwin[1-6].*)        gl_cv_func_snprintf_retval_c99="guessing no";;
+         darwin*)              gl_cv_func_snprintf_retval_c99="guessing yes";;
+                               # Guess yes on OpenBSD >= 3.9.
+         openbsd[1-2].* | openbsd3.[0-8] | openbsd3.[0-8].*)
+                               gl_cv_func_snprintf_retval_c99="guessing no";;
+         openbsd*)             gl_cv_func_snprintf_retval_c99="guessing yes";;
+                               # Guess yes on Solaris >= 2.6.
+         solaris2.[0-5]*)      gl_cv_func_snprintf_retval_c99="guessing no";;
+         solaris*)             gl_cv_func_snprintf_retval_c99="guessing yes";;
+                               # Guess yes on AIX >= 4.
+         aix[1-3]*)            gl_cv_func_snprintf_retval_c99="guessing no";;
+         aix*)                 gl_cv_func_snprintf_retval_c99="guessing yes";;
+                               # Guess yes on NetBSD >= 3.
+         netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*)
+                               gl_cv_func_snprintf_retval_c99="guessing no";;
+         netbsd*)              gl_cv_func_snprintf_retval_c99="guessing yes";;
+                               # Guess yes on BeOS.
+         beos*)                gl_cv_func_snprintf_retval_c99="guessing yes";;
+                               # If we don't know, assume the worst.
+         *)                    gl_cv_func_snprintf_retval_c99="guessing no";;
+       esac
 changequote([,])dnl
-        ])
+      ])
     ])
 ])
 
@@ -1257,28 +1162,12 @@ AC_DEFUN([gl_SNPRINTF_DIRECTIVE_N],
 [
   AC_REQUIRE([AC_PROG_CC])
   AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
-  AC_REQUIRE([gl_SNPRINTF_PRESENCE])
   AC_CACHE_CHECK([whether snprintf fully supports the 'n' directive],
     [gl_cv_func_snprintf_directive_n],
     [
-      AC_RUN_IFELSE(
-        [AC_LANG_SOURCE([[
+      AC_TRY_RUN([
 #include <stdio.h>
 #include <string.h>
-#if HAVE_SNPRINTF
-# define my_snprintf snprintf
-#else
-# include <stdarg.h>
-static int my_snprintf (char *buf, int size, const char *format, ...)
-{
-  va_list args;
-  int ret;
-  va_start (args, format);
-  ret = vsnprintf (buf, size, format, args);
-  va_end (args);
-  return ret;
-}
-#endif
 static char fmtstring[10];
 static char buf[100];
 int main ()
@@ -1288,47 +1177,44 @@ int main ()
      support %n in format strings in read-only memory but not in writable
      memory.  */
   strcpy (fmtstring, "%d %n");
-  my_snprintf (buf, 4, fmtstring, 12345, &count, 33, 44, 55);
+  snprintf (buf, 4, fmtstring, 12345, &count, 33, 44, 55);
   if (count != 6)
     return 1;
   return 0;
-}]])],
-        [gl_cv_func_snprintf_directive_n=yes],
-        [gl_cv_func_snprintf_directive_n=no],
-        [
+}], [gl_cv_func_snprintf_directive_n=yes], [gl_cv_func_snprintf_directive_n=no],
+      [
 changequote(,)dnl
-         case "$host_os" in
-                                 # Guess yes on glibc systems.
-           *-gnu*)               gl_cv_func_snprintf_directive_n="guessing yes";;
-                                 # Guess yes on FreeBSD >= 5.
-           freebsd[1-4].*)       gl_cv_func_snprintf_directive_n="guessing no";;
-           freebsd* | kfreebsd*) gl_cv_func_snprintf_directive_n="guessing yes";;
-                                 # Guess yes on Mac OS X >= 10.3.
-           darwin[1-6].*)        gl_cv_func_snprintf_directive_n="guessing no";;
-           darwin*)              gl_cv_func_snprintf_directive_n="guessing yes";;
-                                 # Guess yes on Solaris >= 2.6.
-           solaris2.[0-5] | solaris2.[0-5].*)
-                                 gl_cv_func_snprintf_directive_n="guessing no";;
-           solaris*)             gl_cv_func_snprintf_directive_n="guessing yes";;
-                                 # Guess yes on AIX >= 4.
-           aix[1-3]*)            gl_cv_func_snprintf_directive_n="guessing no";;
-           aix*)                 gl_cv_func_snprintf_directive_n="guessing yes";;
-                                 # Guess yes on IRIX >= 6.5.
-           irix6.5)              gl_cv_func_snprintf_directive_n="guessing yes";;
-                                 # Guess yes on OSF/1 >= 5.
-           osf[3-4]*)            gl_cv_func_snprintf_directive_n="guessing no";;
-           osf*)                 gl_cv_func_snprintf_directive_n="guessing yes";;
-                                 # Guess yes on NetBSD >= 3.
-           netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*)
-                                 gl_cv_func_snprintf_directive_n="guessing no";;
-           netbsd*)              gl_cv_func_snprintf_directive_n="guessing yes";;
-                                 # Guess yes on BeOS.
-           beos*)                gl_cv_func_snprintf_directive_n="guessing yes";;
-                                 # If we don't know, assume the worst.
-           *)                    gl_cv_func_snprintf_directive_n="guessing no";;
-         esac
+       case "$host_os" in
+                               # Guess yes on glibc systems.
+         *-gnu*)               gl_cv_func_snprintf_directive_n="guessing yes";;
+                               # Guess yes on FreeBSD >= 5.
+         freebsd[1-4]*)        gl_cv_func_snprintf_directive_n="guessing no";;
+         freebsd* | kfreebsd*) gl_cv_func_snprintf_directive_n="guessing yes";;
+                               # Guess yes on MacOS X >= 10.3.
+         darwin[1-6].*)        gl_cv_func_snprintf_directive_n="guessing no";;
+         darwin*)              gl_cv_func_snprintf_directive_n="guessing yes";;
+                               # Guess yes on Solaris >= 2.6.
+         solaris2.[0-5]*)      gl_cv_func_snprintf_directive_n="guessing no";;
+         solaris*)             gl_cv_func_snprintf_directive_n="guessing yes";;
+                               # Guess yes on AIX >= 4.
+         aix[1-3]*)            gl_cv_func_snprintf_directive_n="guessing no";;
+         aix*)                 gl_cv_func_snprintf_directive_n="guessing yes";;
+                               # Guess yes on IRIX >= 6.5.
+         irix6.5)              gl_cv_func_snprintf_directive_n="guessing yes";;
+                               # Guess yes on OSF/1 >= 5.
+         osf[3-4]*)            gl_cv_func_snprintf_directive_n="guessing no";;
+         osf*)                 gl_cv_func_snprintf_directive_n="guessing yes";;
+                               # Guess yes on NetBSD >= 3.
+         netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*)
+                               gl_cv_func_snprintf_directive_n="guessing no";;
+         netbsd*)              gl_cv_func_snprintf_directive_n="guessing yes";;
+                               # Guess yes on BeOS.
+         beos*)                gl_cv_func_snprintf_directive_n="guessing yes";;
+                               # If we don't know, assume the worst.
+         *)                    gl_cv_func_snprintf_directive_n="guessing no";;
+       esac
 changequote([,])dnl
-        ])
+      ])
     ])
 ])
 
@@ -1340,36 +1226,20 @@ dnl Result is gl_cv_func_snprintf_size1.
 AC_DEFUN([gl_SNPRINTF_SIZE1],
 [
   AC_REQUIRE([AC_PROG_CC])
-  AC_REQUIRE([gl_SNPRINTF_PRESENCE])
   AC_CACHE_CHECK([whether snprintf respects a size of 1],
     [gl_cv_func_snprintf_size1],
     [
-      AC_RUN_IFELSE(
-        [AC_LANG_SOURCE([[
+      AC_TRY_RUN([
 #include <stdio.h>
-#if HAVE_SNPRINTF
-# define my_snprintf snprintf
-#else
-# include <stdarg.h>
-static int my_snprintf (char *buf, int size, const char *format, ...)
-{
-  va_list args;
-  int ret;
-  va_start (args, format);
-  ret = vsnprintf (buf, size, format, args);
-  va_end (args);
-  return ret;
-}
-#endif
 int main()
 {
   static char buf[8] = { 'D', 'E', 'A', 'D', 'B', 'E', 'E', 'F' };
-  my_snprintf (buf, 1, "%d", 12345);
+  snprintf (buf, 1, "%d", 12345);
   return buf[1] != 'E';
-}]])],
-        [gl_cv_func_snprintf_size1=yes],
-        [gl_cv_func_snprintf_size1=no],
-        [gl_cv_func_snprintf_size1="guessing yes"])
+}],
+      [gl_cv_func_snprintf_size1=yes],
+      [gl_cv_func_snprintf_size1=no],
+      [gl_cv_func_snprintf_size1="guessing yes"])
     ])
 ])
 
@@ -1416,8 +1286,7 @@ AC_DEFUN([gl_VSNPRINTF_ZEROSIZE_C99],
   AC_CACHE_CHECK([whether vsnprintf respects a zero size as in C99],
     [gl_cv_func_vsnprintf_zerosize_c99],
     [
-      AC_RUN_IFELSE(
-        [AC_LANG_SOURCE([[
+      AC_TRY_RUN([
 #include <stdarg.h>
 #include <stdio.h>
 static int my_snprintf (char *buf, int size, const char *format, ...)
@@ -1434,44 +1303,43 @@ int main()
   static char buf[8] = { 'D', 'E', 'A', 'D', 'B', 'E', 'E', 'F' };
   my_snprintf (buf, 0, "%d", 12345);
   return buf[0] != 'D';
-}]])],
-        [gl_cv_func_vsnprintf_zerosize_c99=yes],
-        [gl_cv_func_vsnprintf_zerosize_c99=no],
-        [
+}],
+      [gl_cv_func_vsnprintf_zerosize_c99=yes],
+      [gl_cv_func_vsnprintf_zerosize_c99=no],
+      [
 changequote(,)dnl
-         case "$host_os" in
-                                 # Guess yes on glibc systems.
-           *-gnu*)               gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
-                                 # Guess yes on FreeBSD >= 5.
-           freebsd[1-4].*)       gl_cv_func_vsnprintf_zerosize_c99="guessing no";;
-           freebsd* | kfreebsd*) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
-                                 # Guess yes on Mac OS X >= 10.3.
-           darwin[1-6].*)        gl_cv_func_vsnprintf_zerosize_c99="guessing no";;
-           darwin*)              gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
-                                 # Guess yes on Cygwin.
-           cygwin*)              gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
-                                 # Guess yes on Solaris >= 2.6.
-           solaris2.[0-5] | solaris2.[0-5].*)
-                                 gl_cv_func_vsnprintf_zerosize_c99="guessing no";;
-           solaris*)             gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
-                                 # Guess yes on AIX >= 4.
-           aix[1-3]*)            gl_cv_func_vsnprintf_zerosize_c99="guessing no";;
-           aix*)                 gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
-                                 # Guess yes on IRIX >= 6.5.
-           irix6.5)              gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
-                                 # Guess yes on NetBSD >= 3.
-           netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*)
-                                 gl_cv_func_vsnprintf_zerosize_c99="guessing no";;
-           netbsd*)              gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
-                                 # Guess yes on BeOS.
-           beos*)                gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
-                                 # Guess yes on mingw.
-           mingw* | pw*)         gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
-                                 # If we don't know, assume the worst.
-           *)                    gl_cv_func_vsnprintf_zerosize_c99="guessing no";;
-         esac
+       case "$host_os" in
+                               # Guess yes on glibc systems.
+         *-gnu*)               gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
+                               # Guess yes on FreeBSD >= 5.
+         freebsd[1-4]*)        gl_cv_func_vsnprintf_zerosize_c99="guessing no";;
+         freebsd* | kfreebsd*) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
+                               # Guess yes on MacOS X >= 10.3.
+         darwin[1-6].*)        gl_cv_func_vsnprintf_zerosize_c99="guessing no";;
+         darwin*)              gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
+                               # Guess yes on Cygwin.
+         cygwin*)              gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
+                               # Guess yes on Solaris >= 2.6.
+         solaris2.[0-5]*)      gl_cv_func_vsnprintf_zerosize_c99="guessing no";;
+         solaris*)             gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
+                               # Guess yes on AIX >= 4.
+         aix[1-3]*)            gl_cv_func_vsnprintf_zerosize_c99="guessing no";;
+         aix*)                 gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
+                               # Guess yes on IRIX >= 6.5.
+         irix6.5)              gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
+                               # Guess yes on NetBSD >= 3.
+         netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*)
+                               gl_cv_func_vsnprintf_zerosize_c99="guessing no";;
+         netbsd*)              gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
+                               # Guess yes on BeOS.
+         beos*)                gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
+                               # Guess yes on mingw.
+         mingw* | pw*)         gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
+                               # If we don't know, assume the worst.
+         *)                    gl_cv_func_vsnprintf_zerosize_c99="guessing no";;
+       esac
 changequote([,])dnl
-        ])
+      ])
     ])
 ])
 
@@ -1525,31 +1393,24 @@ dnl                                  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15
 dnl   glibc 2.5                      .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .
 dnl   glibc 2.3.6                    .  .  .  .  #  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .
 dnl   FreeBSD 5.4, 6.1               .  .  .  .  #  .  .  .  .  .  .  #  .  #  .  .  .  .  .  .
-dnl   Mac OS X 10.5.8                .  .  .  #  #  .  .  .  .  .  .  #  .  .  .  .  .  .  .  .
-dnl   Mac OS X 10.3.9                .  .  .  .  #  .  .  .  .  .  .  #  .  #  .  .  .  .  .  .
+dnl   MacOS X 10.3.9                 .  .  .  .  #  .  .  .  .  .  .  #  .  #  .  .  .  .  .  .
 dnl   OpenBSD 3.9, 4.0               .  .  #  #  #  #  .  #  .  #  .  #  .  #  .  .  .  .  .  .
 dnl   Cygwin 1.7.0 (2009)            .  .  .  #  .  .  .  ?  .  .  .  .  .  ?  .  .  .  .  .  .
 dnl   Cygwin 1.5.25 (2008)           .  .  .  #  #  .  .  #  .  .  .  .  .  #  .  .  .  .  .  .
 dnl   Cygwin 1.5.19 (2006)           #  .  .  #  #  #  .  #  .  #  .  #  #  #  .  .  .  .  .  .
-dnl   Solaris 11 2011-11             .  .  #  #  #  .  .  #  .  .  .  #  .  .  .  .  .  .  .  .
-dnl   Solaris 10                     .  .  #  #  #  .  .  #  .  .  .  #  #  .  .  .  .  .  .  .
-dnl   Solaris 2.6 ... 9              #  .  #  #  #  #  .  #  .  .  .  #  #  .  .  .  #  .  .  .
+dnl   Solaris 10                     .  .  #  #  #  .  .  #  .  .  .  #  .  .  .  .  .  .  .  .
+dnl   Solaris 2.6 ... 9              #  .  #  #  #  #  .  #  .  .  .  #  .  .  .  .  .  .  .  .
 dnl   Solaris 2.5.1                  #  .  #  #  #  #  .  #  .  .  .  #  .  .  #  #  #  #  #  #
-dnl   AIX 7.1                        .  .  #  #  #  .  .  .  .  .  .  #  #  .  .  .  .  .  .  .
 dnl   AIX 5.2                        .  .  #  #  #  .  .  .  .  .  .  #  .  .  .  .  .  .  .  .
-dnl   AIX 4.3.2, 5.1                 #  .  #  #  #  #  .  .  .  .  .  #  .  .  .  .  #  .  .  .
+dnl   AIX 4.3.2, 5.1                 #  .  #  #  #  #  .  .  .  .  .  #  .  .  .  .  .  .  .  .
 dnl   HP-UX 11.31                    .  .  .  .  #  .  .  .  .  .  .  #  .  .  .  .  #  #  .  .
 dnl   HP-UX 11.{00,11,23}            #  .  .  .  #  #  .  .  .  .  .  #  .  .  .  .  #  #  .  #
 dnl   HP-UX 10.20                    #  .  #  .  #  #  .  ?  .  .  #  #  .  .  .  .  #  #  ?  #
 dnl   IRIX 6.5                       #  .  #  #  #  #  .  #  .  .  .  #  .  .  .  .  #  .  .  .
 dnl   OSF/1 5.1                      #  .  #  #  #  #  .  .  .  .  .  #  .  .  .  .  #  .  .  #
 dnl   OSF/1 4.0d                     #  .  #  #  #  #  .  .  .  .  .  #  .  .  #  #  #  #  #  #
-dnl   NetBSD 5.0                     .  .  .  #  #  .  .  .  .  .  .  #  .  #  .  .  .  .  .  .
 dnl   NetBSD 4.0                     .  ?  ?  ?  ?  ?  .  ?  .  ?  ?  ?  ?  ?  .  .  .  ?  ?  ?
 dnl   NetBSD 3.0                     .  .  .  .  #  #  .  ?  #  #  ?  #  .  #  .  .  .  .  .  .
-dnl   Haiku                          .  .  .  #  #  #  .  #  .  .  .  .  .  ?  .  .  ?  .  .  .
-dnl   BeOS                           #  #  .  #  #  #  .  ?  #  .  ?  .  #  ?  .  .  ?  .  .  .
-dnl   old mingw / msvcrt             #  #  #  #  #  #  .  .  #  #  .  #  #  ?  .  #  #  #  .  .
-dnl   MSVC 9                         #  #  #  #  #  #  #  .  #  #  .  #  #  ?  #  #  #  #  .  .
-dnl   mingw 2009-2011                .  #  .  #  .  .  .  .  #  #  .  .  .  ?  .  .  .  .  .  .
-dnl   mingw-w64 2011                 #  #  #  #  #  #  .  .  #  #  .  #  #  ?  .  #  #  #  .  .
+dnl   Haiku                          .  .  .  #  #  #  .  #  .  .  .  .  .  ?  .  .  .  .  .  .
+dnl   BeOS                           #  #  .  #  #  #  .  ?  #  .  ?  .  #  ?  .  .  .  .  .  .
+dnl   mingw                          #  #  #  #  #  #  .  .  #  #  .  #  #  ?  .  #  #  #  .  .