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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 15:19:27 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 15:19:27 +0000
commite0023883c6d2e6745a19e4b48e186ed156c1fca8 (patch)
tree1a48b8056ec984385d0d862b683535d04d6ed215 /gl/lib/free.c
parentInitial commit. (diff)
downloadman-db-e0023883c6d2e6745a19e4b48e186ed156c1fca8.tar.xz
man-db-e0023883c6d2e6745a19e4b48e186ed156c1fca8.zip
Adding upstream version 2.11.2.upstream/2.11.2upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'gl/lib/free.c')
-rw-r--r--gl/lib/free.c53
1 files changed, 53 insertions, 0 deletions
diff --git a/gl/lib/free.c b/gl/lib/free.c
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--- /dev/null
+++ b/gl/lib/free.c
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+/* Make free() preserve errno.
+
+ Copyright (C) 2003, 2006, 2009-2022 Free Software Foundation, Inc.
+
+ This file is free software: you can redistribute it and/or modify
+ it under the terms of the GNU Lesser General Public License as
+ published by the Free Software Foundation; either version 2.1 of the
+ License, or (at your option) any later version.
+
+ This file is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>. */
+
+/* written by Paul Eggert */
+
+#include <config.h>
+
+/* Specification. */
+#include <stdlib.h>
+
+/* A function definition is only needed if HAVE_FREE_POSIX is not defined. */
+#if !HAVE_FREE_POSIX
+
+# include <errno.h>
+
+void
+rpl_free (void *p)
+# undef free
+{
+# if defined __GNUC__ && !defined __clang__
+ /* An invalid GCC optimization
+ <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98396>
+ would optimize away the assignments in the code below, when link-time
+ optimization (LTO) is enabled. Make the code more complicated, so that
+ GCC does not grok how to optimize it. */
+ int err[2];
+ err[0] = errno;
+ err[1] = errno;
+ errno = 0;
+ free (p);
+ errno = err[errno == 0];
+# else
+ int err = errno;
+ free (p);
+ errno = err;
+# endif
+}
+
+#endif