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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:16:24 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:16:24 +0000 |
commit | 9221dca64f0c8b5de72727491e41cf63e902eaab (patch) | |
tree | d8cbbf520eb4b5c656a54b2e36947008dcb751ad /gl/m4/realloc.m4 | |
parent | Initial commit. (diff) | |
download | man-db-9221dca64f0c8b5de72727491e41cf63e902eaab.tar.xz man-db-9221dca64f0c8b5de72727491e41cf63e902eaab.zip |
Adding upstream version 2.8.5.upstream/2.8.5upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'gl/m4/realloc.m4')
-rw-r--r-- | gl/m4/realloc.m4 | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/gl/m4/realloc.m4 b/gl/m4/realloc.m4 new file mode 100644 index 0000000..1281a35 --- /dev/null +++ b/gl/m4/realloc.m4 @@ -0,0 +1,79 @@ +# realloc.m4 serial 15 +dnl Copyright (C) 2007, 2009-2019 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. + +m4_version_prereq([2.70], [] ,[ + +# This is adapted with modifications from upstream Autoconf here: +# https://git.savannah.gnu.org/cgit/autoconf.git/commit/?id=04be2b7a29d65d9a08e64e8e56e594c91749598c +AC_DEFUN([_AC_FUNC_REALLOC_IF], +[ + AC_REQUIRE([AC_HEADER_STDC])dnl + AC_REQUIRE([AC_CANONICAL_HOST])dnl for cross-compiles + AC_CHECK_HEADERS([stdlib.h]) + AC_CACHE_CHECK([for GNU libc compatible realloc], + [ac_cv_func_realloc_0_nonnull], + [AC_RUN_IFELSE( + [AC_LANG_PROGRAM( + [[#if defined STDC_HEADERS || defined HAVE_STDLIB_H + # include <stdlib.h> + #else + char *realloc (); + #endif + ]], + [[char *p = realloc (0, 0); + int result = !p; + free (p); + return result;]]) + ], + [ac_cv_func_realloc_0_nonnull=yes], + [ac_cv_func_realloc_0_nonnull=no], + [case "$host_os" in + # Guess yes on platforms where we know the result. + *-gnu* | gnu* | freebsd* | netbsd* | openbsd* \ + | hpux* | solaris* | cygwin* | mingw*) + ac_cv_func_realloc_0_nonnull=yes ;; + # If we don't know, assume the worst. + *) ac_cv_func_realloc_0_nonnull=no ;; + esac + ]) + ]) + AS_IF([test $ac_cv_func_realloc_0_nonnull = yes], [$1], [$2]) +])# AC_FUNC_REALLOC + +]) + +# gl_FUNC_REALLOC_GNU +# ------------------- +# Test whether 'realloc (0, 0)' is handled like in GNU libc, and replace +# realloc if it is not. +AC_DEFUN([gl_FUNC_REALLOC_GNU], +[ + AC_REQUIRE([gl_STDLIB_H_DEFAULTS]) + dnl _AC_FUNC_REALLOC_IF is defined in Autoconf. + _AC_FUNC_REALLOC_IF( + [AC_DEFINE([HAVE_REALLOC_GNU], [1], + [Define to 1 if your system has a GNU libc compatible 'realloc' + function, and to 0 otherwise.])], + [AC_DEFINE([HAVE_REALLOC_GNU], [0]) + REPLACE_REALLOC=1 + ]) +])# gl_FUNC_REALLOC_GNU + +# gl_FUNC_REALLOC_POSIX +# --------------------- +# Test whether 'realloc' is POSIX compliant (sets errno to ENOMEM when it +# fails), and replace realloc if it is not. +AC_DEFUN([gl_FUNC_REALLOC_POSIX], +[ + AC_REQUIRE([gl_STDLIB_H_DEFAULTS]) + AC_REQUIRE([gl_CHECK_MALLOC_POSIX]) + if test $gl_cv_func_malloc_posix = yes; then + AC_DEFINE([HAVE_REALLOC_POSIX], [1], + [Define if the 'realloc' function is POSIX compliant.]) + else + REPLACE_REALLOC=1 + fi +]) |