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

1 files changed, 44 insertions, 72 deletions

diff --git a/gnulib-m4/strerror.m4 b/gnulib-m4/strerror.m4
index 75a17f20..1649b245 100644
--- a/gnulib-m4/strerror.m4
+++ b/gnulib-m4/strerror.m4
@@ -1,96 +1,68 @@
-# strerror.m4 serial 17
-dnl Copyright (C) 2002, 2007-2015 Free Software Foundation, Inc.
+# strerror.m4 serial 9
+dnl Copyright (C) 2002, 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.
 
 AC_DEFUN([gl_FUNC_STRERROR],
 [
+  AC_REQUIRE([gl_FUNC_STRERROR_SEPARATE])
+  if test $REPLACE_STRERROR = 1; then
+    AC_LIBOBJ([strerror])
+    AC_DEFINE_UNQUOTED([REPLACE_STRERROR], [$REPLACE_STRERROR],
+      [Define this to 1 if strerror is broken.])
+  fi
+])
+
+# Like gl_FUNC_STRERROR, except prepare for separate compilation (no AC_LIBOBJ).
+AC_DEFUN([gl_FUNC_STRERROR_SEPARATE],
+[
   AC_REQUIRE([gl_HEADER_STRING_H_DEFAULTS])
   AC_REQUIRE([gl_HEADER_ERRNO_H])
-  AC_REQUIRE([gl_FUNC_STRERROR_0])
-  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
-  m4_ifdef([gl_FUNC_STRERROR_R_WORKS], [
-    AC_REQUIRE([gl_FUNC_STRERROR_R_WORKS])
-  ])
-  if test "$ERRNO_H:$REPLACE_STRERROR_0" = :0; then
+  if test -z "$ERRNO_H"; then
     AC_CACHE_CHECK([for working strerror function],
      [gl_cv_func_working_strerror],
      [AC_RUN_IFELSE(
         [AC_LANG_PROGRAM(
            [[#include <string.h>
            ]],
-           [[if (!*strerror (-2)) return 1;]])],
+           [[return !*strerror (-2);]])],
         [gl_cv_func_working_strerror=yes],
         [gl_cv_func_working_strerror=no],
-        [case "$host_os" in
-                   # Guess yes on glibc systems.
-           *-gnu*) gl_cv_func_working_strerror="guessing yes" ;;
-                   # If we don't know, assume the worst.
-           *)      gl_cv_func_working_strerror="guessing no" ;;
-         esac
-        ])
-    ])
-    case "$gl_cv_func_working_strerror" in
-      *yes) ;;
-      *)
-        dnl The system's strerror() fails to return a string for out-of-range
-        dnl integers. Replace it.
-        REPLACE_STRERROR=1
-        ;;
-    esac
-    m4_ifdef([gl_FUNC_STRERROR_R_WORKS], [
-      dnl If the system's strerror_r or __xpg_strerror_r clobbers strerror's
-      dnl buffer, we must replace strerror.
-      case "$gl_cv_func_strerror_r_works" in
-        *no) REPLACE_STRERROR=1 ;;
-      esac
+        [dnl Assume crossbuild works if it compiles.
+         AC_COMPILE_IFELSE(
+           [AC_LANG_PROGRAM(
+              [[#include <string.h>
+              ]],
+              [[return !*strerror (-2);]])],
+           [gl_cv_func_working_strerror=yes],
+           [gl_cv_func_working_strerror=no])
+      ])
     ])
+    if test $gl_cv_func_working_strerror = no; then
+      dnl The system's strerror() fails to return a string for out-of-range
+      dnl integers. Replace it.
+      REPLACE_STRERROR=1
+    fi
   else
     dnl The system's strerror() cannot know about the new errno values we add
-    dnl to <errno.h>, or any fix for strerror(0). Replace it.
+    dnl to <errno.h>. Replace it.
     REPLACE_STRERROR=1
   fi
+  if test $REPLACE_STRERROR = 1; then
+    gl_PREREQ_STRERROR
+  fi
 ])
 
-dnl Detect if strerror(0) passes (that is, does not set errno, and does not
-dnl return a string that matches strerror(-1)).
-AC_DEFUN([gl_FUNC_STRERROR_0],
-[
-  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
-  REPLACE_STRERROR_0=0
-  AC_CACHE_CHECK([whether strerror(0) succeeds],
-   [gl_cv_func_strerror_0_works],
-   [AC_RUN_IFELSE(
-      [AC_LANG_PROGRAM(
-         [[#include <string.h>
-           #include <errno.h>
-         ]],
-         [[int result = 0;
-           char *str;
-           errno = 0;
-           str = strerror (0);
-           if (!*str) result |= 1;
-           if (errno) result |= 2;
-           if (strstr (str, "nknown") || strstr (str, "ndefined"))
-             result |= 4;
-           return result;]])],
-      [gl_cv_func_strerror_0_works=yes],
-      [gl_cv_func_strerror_0_works=no],
-      [case "$host_os" in
-                 # Guess yes on glibc systems.
-         *-gnu*) gl_cv_func_strerror_0_works="guessing yes" ;;
-                 # If we don't know, assume the worst.
-         *)      gl_cv_func_strerror_0_works="guessing no" ;;
-       esac
-      ])
-  ])
-  case "$gl_cv_func_strerror_0_works" in
-    *yes) ;;
-    *)
-      REPLACE_STRERROR_0=1
-      AC_DEFINE([REPLACE_STRERROR_0], [1], [Define to 1 if strerror(0)
-        does not return a message implying success.])
-      ;;
-  esac
+# Prerequisites of lib/strerror.c.
+AC_DEFUN([gl_PREREQ_STRERROR], [
+  AC_CHECK_DECLS([strerror])
+  AC_CHECK_HEADERS_ONCE([sys/socket.h])
+  if test $ac_cv_header_sys_socket_h != yes; then
+    dnl We cannot use AC_CHECK_HEADERS_ONCE here, because that would make
+    dnl the check for those headers unconditional; yet cygwin reports
+    dnl that the headers are present but cannot be compiled (since on
+    dnl cygwin, all socket information should come from sys/socket.h).
+    AC_CHECK_HEADERS([winsock2.h])
+  fi
 ])