diff options
Diffstat (limited to 'gl/m4/strerror.m4')
| -rw-r--r-- | gl/m4/strerror.m4 | 63 |
1 files changed, 42 insertions, 21 deletions
diff --git a/gl/m4/strerror.m4 b/gl/m4/strerror.m4 index eb7d45aa..8c16ca9a 100644 --- a/gl/m4/strerror.m4 +++ b/gl/m4/strerror.m4 @@ -1,5 +1,5 @@ -# strerror.m4 serial 7 -dnl Copyright (C) 2002, 2007 Free Software Foundation, Inc. +# strerror.m4 serial 9 +dnl Copyright (C) 2002, 2007-2008 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. @@ -7,7 +7,7 @@ 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 $gl_cv_func_working_strerror = no; then + if test $REPLACE_STRERROR = 1; then AC_LIBOBJ([strerror]) AC_DEFINE_UNQUOTED([REPLACE_STRERROR], [$REPLACE_STRERROR], [Define this to 1 if strerror is broken.]) @@ -18,25 +18,38 @@ AC_DEFUN([gl_FUNC_STRERROR], AC_DEFUN([gl_FUNC_STRERROR_SEPARATE], [ AC_REQUIRE([gl_HEADER_STRING_H_DEFAULTS]) - AC_CACHE_CHECK([for working strerror function], - [gl_cv_func_working_strerror], - [AC_RUN_IFELSE( - [AC_LANG_PROGRAM( - [#include <string.h> - ], - [return !*strerror (-2);])], - [gl_cv_func_working_strerror=yes], - [gl_cv_func_working_strerror=no], - [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 $gl_cv_func_working_strerror = no ; then + AC_REQUIRE([gl_HEADER_ERRNO_H]) + if test -z "$ERRNO_H"; then + AC_CACHE_CHECK([for working strerror function], + [gl_cv_func_working_strerror], + [AC_RUN_IFELSE( + [AC_LANG_PROGRAM( + [[#include <string.h> + ]], + [[return !*strerror (-2);]])], + [gl_cv_func_working_strerror=yes], + [gl_cv_func_working_strerror=no], + [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>. Replace it. REPLACE_STRERROR=1 + fi + if test $REPLACE_STRERROR = 1; then gl_PREREQ_STRERROR fi ]) @@ -44,4 +57,12 @@ AC_DEFUN([gl_FUNC_STRERROR_SEPARATE], # 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 ]) |