diff options
Diffstat (limited to 'gnulib-m4/strerror.m4')
| -rw-r--r-- | gnulib-m4/strerror.m4 | 116 |
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 ]) |