-# strerror_r.m4 serial 10
+# strerror_r.m4 serial 11
dnl Copyright (C) 2002, 2007-2011 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
AC_DEFUN([gl_FUNC_STRERROR_R],
[
+ AC_REQUIRE([gl_HEADER_STRING_H_DEFAULTS])
AC_REQUIRE([gl_FUNC_STRERROR_R_WORKS])
dnl Persuade Solaris <string.h> to declare strerror_r().
*no) REPLACE_STRERROR_R=1 ;;
esac
else
- dnl The system's strerror() has a wrong signature. Replace it.
+ dnl The system's strerror_r() has a wrong signature. Replace it.
REPLACE_STRERROR_R=1
fi
else
# Prerequisites of lib/strerror_r.c.
AC_DEFUN([gl_PREREQ_STRERROR_R], [
+ dnl glibc >= 2.3.4 and cygwin 1.7.9 have a function __xpg_strerror_r.
+ AC_CHECK_FUNCS([__xpg_strerror_r])
AC_CHECK_FUNCS_ONCE([catgets])
- :
])
# Detect if strerror_r works, but without affecting whether a replacement
# strerror_r will be used.
AC_DEFUN([gl_FUNC_STRERROR_R_WORKS],
[
- AC_REQUIRE([gl_HEADER_STRING_H_DEFAULTS])
AC_REQUIRE([gl_HEADER_ERRNO_H])
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
dnl HP-UX 11.31 strerror_r always fails when the buffer length argument
dnl is less than 80.
dnl FreeBSD 8.s strerror_r claims failure on 0
+ dnl MacOS X 10.5 strerror_r treats 0 like -1
dnl Solaris 10 strerror_r corrupts errno on failure
AC_CACHE_CHECK([whether strerror_r works],
[gl_cv_func_strerror_r_works],
errno = 0;
if (strerror_r (EACCES, buf, sizeof buf) != 0)
result |= 2;
+ strcpy (buf, "Unknown");
if (strerror_r (0, buf, sizeof buf) != 0)
result |= 4;
if (errno)
result |= 8;
- errno = 0;
- if (strerror_r (-3, buf, sizeof buf) != 0)
+ if (strstr (buf, "nknown") || strstr (buf, "ndefined"))
result |= 0x10;
- if (errno)
+ errno = 0;
+ *buf = 0;
+ if (strerror_r (-3, buf, sizeof buf) < 0)
result |= 0x20;
+ if (errno)
+ result |= 0x40;
+ if (!*buf)
+ result |= 0x80;
return result;
]])],
[gl_cv_func_strerror_r_works=yes],
dnl The system's strerror() has a wrong signature.
dnl glibc >= 2.3.4 and cygwin 1.7.9 have a function __xpg_strerror_r.
AC_CHECK_FUNCS([__xpg_strerror_r])
- dnl glibc < 2.14 does not populate buf on failure
- dnl cygwin < 1.7.10 clobbers strerror
+ dnl In glibc < 2.14, __xpg_strerror_r does not populate buf on failure.
+ dnl In cygwin < 1.7.10, __xpg_strerror_r clobbers strerror's buffer.
if test $ac_cv_func___xpg_strerror_r = yes; then
- AC_CACHE_CHECK([whether strerror_r works],
+ AC_CACHE_CHECK([whether __xpg_strerror_r works],
[gl_cv_func_strerror_r_works],
[AC_RUN_IFELSE(
[AC_LANG_PROGRAM(
]])],
[gl_cv_func_strerror_r_works=yes],
[gl_cv_func_strerror_r_works=no],
- [dnl guess no on all platforms that have __xpg_strerror_r,
- dnl at least until fixed glibc and cygwin are more common
+ [dnl Guess no on all platforms that have __xpg_strerror_r,
+ dnl at least until fixed glibc and cygwin are more common.
gl_cv_func_strerror_r_works="guessing no"
])
])