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test for broken realloc

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git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@8676 ec53bebd-3082-4978-b11e-865c3cabbd6b
This commit is contained in:
Johan Danielsson
2000-07-15 18:05:36 +00:00
parent 211b8aaff0
commit 572327b5bc
1 changed files with 26 additions and 0 deletions
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26
cf/broken-realloc.m4 Normal file
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dnl
dnl $Id$
dnl
dnl Test for realloc that doesn't handle NULL as first parameter
dnl
AC_DEFUN(rk_BROKEN_REALLOC, [
AC_CACHE_CHECK(if realloc if broken, ac_cv_func_realloc_broken, [
ac_cv_func_realloc_broken=no
AC_TRY_RUN([
#include <stddef.h>
#include <stdlib.h>
int main()
{
return realloc(NULL, 17) == NULL;
}
],:, ac_cv_func_realloc_broken=yes, :)
])
if test "$ac_cv_func_realloc_broken" = yes ; then
AC_DEFINE(BROKEN_REALLOC, 1, [Define if realloc(NULL) doesn't work.])
fi
AH_BOTTOM([#ifdef BROKEN_REALLOC
#define realloc(X, Y) isoc_realloc((X), (Y))
#define isoc_realloc(X, Y) ((X) ? realloc((X), (Y)) : malloc(Y))
#endif])
])