4 dnl Determine whether malloc accepts 0 as its argument.
5 dnl If it doesn't, arrange to use the replacement function.
7 dnl If you use this macro in a package, you should
8 dnl add the following two lines to acconfig.h:
9 dnl /* Define to rpl_malloc if the replacement function should be used. */
13 AC_DEFUN(jm_FUNC_MALLOC,
15 dnl xmalloc.c requires that this symbol be defined so it doesn't
16 dnl mistakenly use a broken malloc -- as it might if this test were omitted.
17 AC_DEFINE_UNQUOTED(HAVE_DONE_WORKING_MALLOC_CHECK, 1,
18 [Define if the malloc check has been performed. ])
20 AC_CACHE_CHECK([for working malloc], jm_cv_func_working_malloc,
26 exit (malloc (0) ? 0 : 1);
29 jm_cv_func_working_malloc=yes,
30 jm_cv_func_working_malloc=no,
31 dnl When crosscompiling, assume malloc is broken.
32 jm_cv_func_working_malloc=no)
34 if test $jm_cv_func_working_malloc = no; then
35 LIBOBJS="$LIBOBJS malloc.o"
36 AC_DEFINE_UNQUOTED(malloc, rpl_malloc)