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author | Lorry Tar Creator <lorry-tar-importer@lorry> | 2016-01-20 10:55:18 +0000 |
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committer | Lorry Tar Creator <lorry-tar-importer@lorry> | 2016-01-20 10:55:18 +0000 |
commit | 70e9163c9c18e995515598085cb824e554eb7ae7 (patch) | |
tree | a42dc8b2a6c031354bf31472de888bfc8a060132 /m4/perror.m4 | |
parent | cbf5993c43f49281173f185863577d86bfac6eae (diff) | |
download | coreutils-tarball-70e9163c9c18e995515598085cb824e554eb7ae7.tar.gz |
coreutils-8.25HEADcoreutils-8.25master
Diffstat (limited to 'm4/perror.m4')
-rw-r--r-- | m4/perror.m4 | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/m4/perror.m4 b/m4/perror.m4 new file mode 100644 index 0000000..743ab7a --- /dev/null +++ b/m4/perror.m4 @@ -0,0 +1,63 @@ +# perror.m4 serial 6 +dnl Copyright (C) 2008-2016 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_PERROR], +[ + AC_REQUIRE([gl_STDIO_H_DEFAULTS]) + AC_REQUIRE([gl_HEADER_ERRNO_H]) + AC_REQUIRE([gl_FUNC_STRERROR_R]) + AC_REQUIRE([gl_FUNC_STRERROR_0]) + dnl We intentionally do not check for the broader REPLACE_STRERROR_R, + dnl since on glibc systems, strerror_r is replaced only for signature + dnl issues, and perror is just fine. Rather, we only want to + dnl replace perror if strerror_r was replaced for a content fix. + if test "$ERRNO_H:$REPLACE_STRERROR_0" != :0; then + dnl The system's perror() cannot know about the new errno values we add + dnl to <errno.h>, or any fix for strerror(0). Replace it. + REPLACE_PERROR=1 + fi + case ${gl_cv_func_strerror_r_works-unset} in + unset|*yes) + AC_CACHE_CHECK([whether perror matches strerror], + [gl_cv_func_perror_works], + [AC_RUN_IFELSE( + [AC_LANG_PROGRAM( + [[#include <errno.h> + #include <stdio.h> + #include <stdlib.h> + #include <string.h> + ]], + [[char *str = strerror (-1); + if (!getenv("CONFTEST_OUTPUT")) return 0; + if (!str) str = ""; + puts (str); + errno = -1; + perror (""); + return 0; + ]])], + [if CONFTEST_OUTPUT=1 ./conftest$EXEEXT >conftest.txt1 2>conftest.txt2 \ + && cmp conftest.txt1 conftest.txt2 >/dev/null; then + gl_cv_func_perror_works=yes + else + gl_cv_func_perror_works=no + fi + rm -rf conftest.txt1 conftest.txt2], + [gl_cv_func_perror_works=no], + [dnl Guess no when cross-compiling. + gl_cv_func_perror_works="guessing no" + ]) + ]) + if test "$gl_cv_func_perror_works" != yes; then + REPLACE_PERROR=1 + fi + ;; + *) + dnl The system's perror() probably inherits the bugs in the + dnl system's strerror_r(). Replace it. + REPLACE_PERROR=1 + ;; + esac +]) |