Imported Upstream version 0.9.6+really0.9.3upstream/0.9.6+really0.9.3

1 files changed, 32 insertions, 75 deletions

diff --git a/gnulib-m4/ldexpl.m4 b/gnulib-m4/ldexpl.m4
index 30547db9..d84b50ff 100644
--- a/gnulib-m4/ldexpl.m4
+++ b/gnulib-m4/ldexpl.m4
@@ -1,5 +1,5 @@
-# ldexpl.m4 serial 16
-dnl Copyright (C) 2007-2015 Free Software Foundation, Inc.
+# ldexpl.m4 serial 5
+dnl Copyright (C) 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.
@@ -7,30 +7,29 @@ dnl with or without modifications, as long as this notice is preserved.
 AC_DEFUN([gl_FUNC_LDEXPL],
 [
   AC_REQUIRE([gl_MATH_H_DEFAULTS])
-  AC_REQUIRE([gl_LONG_DOUBLE_VS_DOUBLE])
-  AC_REQUIRE([gl_FUNC_ISNANL]) dnl for ISNANL_LIBM
-
-  dnl Persuade glibc <math.h> to declare ldexpl().
-  AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
-
   dnl Check whether it's declared.
-  dnl Mac OS X 10.3 has ldexpl() in libc but doesn't declare it in <math.h>.
-  AC_CHECK_DECL([ldexpl], , [HAVE_DECL_LDEXPL=0], [[#include <math.h>]])
-
+  dnl MacOS X 10.3 has ldexpl() in libc but doesn't declare it in <math.h>.
+  AC_CHECK_DECL([ldexpl], , [HAVE_DECL_LDEXPL=0], [#include <math.h>])
   LDEXPL_LIBM=
   if test $HAVE_DECL_LDEXPL = 1; then
-    gl_CHECK_LDEXPL_NO_LIBM
+    AC_CACHE_CHECK([whether ldexpl() can be used without linking with libm],
+      [gl_cv_func_ldexpl_no_libm],
+      [
+        AC_TRY_LINK([#include <math.h>
+                     long double x;],
+                    [return ldexpl (x, -1) > 0;],
+          [gl_cv_func_ldexpl_no_libm=yes],
+          [gl_cv_func_ldexpl_no_libm=no])
+      ])
     if test $gl_cv_func_ldexpl_no_libm = no; then
       AC_CACHE_CHECK([whether ldexpl() can be used with libm],
         [gl_cv_func_ldexpl_in_libm],
         [
           save_LIBS="$LIBS"
           LIBS="$LIBS -lm"
-          AC_LINK_IFELSE(
-            [AC_LANG_PROGRAM(
-               [[#include <math.h>
-                 long double x;]],
-               [[return ldexpl (x, -1) > 0;]])],
+          AC_TRY_LINK([#include <math.h>
+                       long double x;],
+                      [return ldexpl (x, -1) > 0;],
             [gl_cv_func_ldexpl_in_libm=yes],
             [gl_cv_func_ldexpl_in_libm=no])
           LIBS="$save_LIBS"
@@ -47,7 +46,7 @@ AC_DEFUN([gl_FUNC_LDEXPL],
       LIBS="$save_LIBS"
       case "$gl_cv_func_ldexpl_works" in
         *yes) gl_func_ldexpl=yes ;;
-        *)    gl_func_ldexpl=no; REPLACE_LDEXPL=1 ;;
+        *)    gl_func_ldexpl=no; REPLACE_LDEXPL=1; LDEXPL_LIBM= ;;
       esac
     else
       gl_func_ldexpl=no
@@ -58,76 +57,34 @@ AC_DEFUN([gl_FUNC_LDEXPL],
     fi
   fi
   if test $HAVE_DECL_LDEXPL = 0 || test $gl_func_ldexpl = no; then
-    dnl Find libraries needed to link lib/ldexpl.c.
-    if test $HAVE_SAME_LONG_DOUBLE_AS_DOUBLE = 1; then
-      AC_REQUIRE([gl_FUNC_LDEXP])
-      LDEXPL_LIBM="$LDEXP_LIBM"
-    else
-      LDEXPL_LIBM="$ISNANL_LIBM"
-    fi
+    AC_LIBOBJ([ldexpl])
   fi
   AC_SUBST([LDEXPL_LIBM])
 ])
 
-dnl Test whether ldexpl() can be used without linking with libm.
-dnl Set gl_cv_func_ldexpl_no_libm to 'yes' or 'no' accordingly.
-AC_DEFUN([gl_CHECK_LDEXPL_NO_LIBM],
-[
-  AC_CACHE_CHECK([whether ldexpl() can be used without linking with libm],
-    [gl_cv_func_ldexpl_no_libm],
-    [
-      AC_LINK_IFELSE(
-        [AC_LANG_PROGRAM(
-           [[#include <math.h>
-             long double x;]],
-           [[return ldexpl (x, -1) > 0;]])],
-        [gl_cv_func_ldexpl_no_libm=yes],
-        [gl_cv_func_ldexpl_no_libm=no])
-    ])
-])
-
 dnl Test whether ldexpl() works on finite numbers (this fails on AIX 5.1
-dnl and Mac OS X 10.4/PowerPC).
+dnl and MacOS X 10.4/PowerPC).
 AC_DEFUN([gl_FUNC_LDEXPL_WORKS],
 [
   AC_REQUIRE([AC_PROG_CC])
   AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
   AC_CACHE_CHECK([whether ldexpl works], [gl_cv_func_ldexpl_works],
     [
-      AC_RUN_IFELSE(
-        [AC_LANG_SOURCE([[
+      AC_TRY_RUN([
 #include <math.h>
-extern
-#ifdef __cplusplus
-"C"
-#endif
-long double ldexpl (long double, int);
+extern long double ldexpl (long double, int);
 int main()
 {
-  int result = 0;
-  {
-    volatile long double x = 1.0;
-    volatile long double y = ldexpl (x, -1);
-    if (y != 0.5L)
-      result |= 1;
-  }
-  {
-    volatile long double x = 1.73205L;
-    volatile long double y = ldexpl (x, 0);
-    if (y != x)
-      result |= 2;
-  }
-  return result;
-}]])],
-        [gl_cv_func_ldexpl_works=yes],
-        [gl_cv_func_ldexpl_works=no],
-        [
-changequote(,)dnl
-         case "$host_os" in
-           aix | aix[3-6]*) gl_cv_func_ldexpl_works="guessing no";;
-           *)               gl_cv_func_ldexpl_works="guessing yes";;
-         esac
-changequote([,])dnl
-        ])
+  volatile long double x1 = 1.0;
+  volatile long double y1 = ldexpl (x1, -1);
+  volatile long double x2 = 1.73205L;
+  volatile long double y2 = ldexpl (x2, 0);
+  return (y1 != 0.5L) || (y2 != x2);
+}], [gl_cv_func_ldexpl_works=yes], [gl_cv_func_ldexpl_works=no],
+      [case "$host_os" in
+         aix*) gl_cv_func_ldexpl_works="guessing no";;
+         *)    gl_cv_func_ldexpl_works="guessing yes";;
+       esac
+      ])
     ])
 ])