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59fbaca6b9
* admin/merge-gnulib (GNULIB_MODULES): Add stringeq. With current Gnulib it is already present as in indirect dependency; listing it here because Emacs now depends on it directly. * lib-src/ebrowse.c, lib-src/etags.c: (streq): Remove, as Gnulib defines this now. * lib/fseterr.c, lib/fseterr.h, lib/issymlink.c, lib/issymlink.h: * lib/issymlinkat.c, lib/stdio-consolesafe.c, lib/string.c: * m4/fseterr.m4, m4/gettext_h.m4, m4/stringeq.m4: New files from Gnulib. * src/conf_post.h (tzfree) [__ANDROID_API__ >= 35]: Remove.
53 lines
1.5 KiB
C
53 lines
1.5 KiB
C
/* Make free() preserve errno.
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Copyright (C) 2003, 2006, 2009-2025 Free Software Foundation, Inc.
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This file is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation; either version 2.1 of the
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License, or (at your option) any later version.
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This file is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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/* written by Paul Eggert */
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#include <config.h>
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/* Specification. */
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#include <stdlib.h>
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/* A function definition is only needed if HAVE_FREE_POSIX is not defined. */
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#if !HAVE_FREE_POSIX
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# include <errno.h>
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void
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rpl_free (void *p)
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# undef free
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{
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# if defined __GNUC__ && !defined __clang__
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/* An invalid GCC optimization
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<https://gcc.gnu.org/PR98396>
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would optimize away the assignments in the code below, when link-time
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optimization (LTO) is enabled. Make the code more complicated, so that
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GCC does not grok how to optimize it. */
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int err[2];
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err[0] = errno;
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err[1] = errno;
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errno = 0;
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free (p);
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errno = err[errno == 0];
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# else
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int err = errno;
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free (p);
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errno = err;
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# endif
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}
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#endif
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