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renameatu: Simplify configure test.

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* m4/renameat.m4 (gl_FUNC_RENAMEAT): Prepare the test scenario outside
of the test program. Use a bit mask as the test program's exit code.
This commit is contained in:
Bruno Haible
2025-01-19 10:05:01 +01:00
parent 1ea1f2bf1b
commit e4b3d54cea
2 changed files with 18 additions and 14 deletions
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6
ChangeLog
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@@ -1,3 +1,9 @@
2025-01-19 Bruno Haible <bruno@clisp.org>
renameatu: Simplify configure test.
* m4/renameat.m4 (gl_FUNC_RENAMEAT): Prepare the test scenario outside
of the test program. Use a bit mask as the test program's exit code.
2025-01-18 Paul Eggert <eggert@cs.ucla.edu>
flexmember: port to IBM XL C 16.1

26
m4/renameat.m4
View File

@@ -1,5 +1,5 @@
# renameat.m4
# serial 5
# serial 6
dnl Copyright (C) 2009-2025 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
@@ -29,27 +29,25 @@ AC_DEFUN([gl_FUNC_RENAMEAT],
if test $ac_cv_func_renameat2 = yes; then
AC_CACHE_CHECK([whether renameat2 works],
[gl_cv_func_renameat2_works],
[AC_RUN_IFELSE(
[rm -rf conftest.a conftest.b
touch conftest.a
AC_RUN_IFELSE(
[AC_LANG_SOURCE([[
#include <unistd.h>
#include <fcntl.h>
#include <stdio.h>
int main ()
{
int fd;
int result = 0;
/* This test fails on Cygwin 3.4.6. */
if (renameat2 (AT_FDCWD, "conftest.c", AT_FDCWD, "conftest.c",
RENAME_NOREPLACE) == 0)
return 1;
fd = open ("conftest.a", O_CREAT | O_EXCL | O_WRONLY, 0600);
if (fd < 0)
return 1;
result |= 1;
/* This test fails on GNU/Hurd. */
if (renameat2 (AT_FDCWD, "conftest.a", AT_FDCWD, "conftest.b/", 0) == 0)
return 1;
if (close (fd) < 0)
return 1;
return 0;
if (renameat2 (AT_FDCWD, "conftest.a", AT_FDCWD, "conftest.b/", 0)
== 0)
result |= 2;
return result;
}
]])],
[gl_cv_func_renameat2_works=yes],
@@ -58,14 +56,14 @@ AC_DEFUN([gl_FUNC_RENAMEAT],
# Guess yes on Linux.
linux*) gl_cv_func_renameat2_works="guessing yes" ;;
# Guess no on GNU/Hurd.
gnu*) gl_cv_func_renameat2_works="guessing no" ;;
gnu*) gl_cv_func_renameat2_works="guessing no" ;;
# Guess no on Cygwin.
cygwin*) gl_cv_func_renameat2_works="guessing no" ;;
# If we don't know, obey --enable-cross-guesses.
*) gl_cv_func_renameat2_works="$gl_cross_guess_normal" ;;
esac
])
rm -rf conftest.a conftest.b
rm -rf conftest.a conftest.b
])
case "$gl_cv_func_renameat2_works" in
*yes)