diff options
Diffstat (limited to 'gnulib-m4/malloc.m4')
| -rw-r--r-- | gnulib-m4/malloc.m4 | 79 |
1 files changed, 68 insertions, 11 deletions
diff --git a/gnulib-m4/malloc.m4 b/gnulib-m4/malloc.m4 index 910ac922..31368ab9 100644 --- a/gnulib-m4/malloc.m4 +++ b/gnulib-m4/malloc.m4 @@ -1,25 +1,78 @@ -# malloc.m4 serial 9 -dnl Copyright (C) 2007, 2009, 2010 Free Software Foundation, Inc. +# malloc.m4 serial 14 +dnl Copyright (C) 2007, 2009-2015 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 taken from the following Autoconf patch: +# http://git.savannah.gnu.org/gitweb/?p=autoconf.git;a=commitdiff;h=7fbb553727ed7e0e689a17594b58559ecf3ea6e9 +AC_DEFUN([_AC_FUNC_MALLOC_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 malloc], + [ac_cv_func_malloc_0_nonnull], + [AC_RUN_IFELSE( + [AC_LANG_PROGRAM( + [[#if defined STDC_HEADERS || defined HAVE_STDLIB_H + # include <stdlib.h> + #else + char *malloc (); + #endif + ]], + [[return ! malloc (0);]]) + ], + [ac_cv_func_malloc_0_nonnull=yes], + [ac_cv_func_malloc_0_nonnull=no], + [case "$host_os" in + # Guess yes on platforms where we know the result. + *-gnu* | freebsd* | netbsd* | openbsd* \ + | hpux* | solaris* | cygwin* | mingw*) + ac_cv_func_malloc_0_nonnull=yes ;; + # If we don't know, assume the worst. + *) ac_cv_func_malloc_0_nonnull=no ;; + esac + ]) + ]) + AS_IF([test $ac_cv_func_malloc_0_nonnull = yes], [$1], [$2]) +])# _AC_FUNC_MALLOC_IF + +]) + +# gl_FUNC_MALLOC_GNU +# ------------------ +# Test whether 'malloc (0)' is handled like in GNU libc, and replace malloc if +# it is not. +AC_DEFUN([gl_FUNC_MALLOC_GNU], +[ + AC_REQUIRE([gl_STDLIB_H_DEFAULTS]) + dnl _AC_FUNC_MALLOC_IF is defined in Autoconf. + _AC_FUNC_MALLOC_IF( + [AC_DEFINE([HAVE_MALLOC_GNU], [1], + [Define to 1 if your system has a GNU libc compatible 'malloc' + function, and to 0 otherwise.])], + [AC_DEFINE([HAVE_MALLOC_GNU], [0]) + REPLACE_MALLOC=1 + ]) +]) + # gl_FUNC_MALLOC_POSIX # -------------------- # Test whether 'malloc' is POSIX compliant (sets errno to ENOMEM when it # fails), and replace malloc if it is not. AC_DEFUN([gl_FUNC_MALLOC_POSIX], [ + AC_REQUIRE([gl_STDLIB_H_DEFAULTS]) AC_REQUIRE([gl_CHECK_MALLOC_POSIX]) if test $gl_cv_func_malloc_posix = yes; then - HAVE_MALLOC_POSIX=1 AC_DEFINE([HAVE_MALLOC_POSIX], [1], [Define if the 'malloc' function is POSIX compliant.]) else - AC_LIBOBJ([malloc]) - HAVE_MALLOC_POSIX=0 + REPLACE_MALLOC=1 fi - AC_SUBST([HAVE_MALLOC_POSIX]) ]) # Test whether malloc, realloc, calloc are POSIX compliant, @@ -32,10 +85,14 @@ AC_DEFUN([gl_CHECK_MALLOC_POSIX], dnl It is too dangerous to try to allocate a large amount of memory: dnl some systems go to their knees when you do that. So assume that dnl all Unix implementations of the function are POSIX compliant. - AC_TRY_COMPILE([], - [#if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__ - choke me - #endif - ], [gl_cv_func_malloc_posix=yes], [gl_cv_func_malloc_posix=no]) + AC_COMPILE_IFELSE( + [AC_LANG_PROGRAM( + [[]], + [[#if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__ + choke me + #endif + ]])], + [gl_cv_func_malloc_posix=yes], + [gl_cv_func_malloc_posix=no]) ]) ]) |