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 AC_CACHE_CHECK([for working malloc], jm_cv_func_working_malloc,
21 exit (malloc (0) ? 0 : 1);
24 jm_cv_func_working_malloc=yes,
25 jm_cv_func_working_malloc=no,
26 dnl When crosscompiling, assume malloc is broken.
27 jm_cv_func_working_malloc=no)
29 if test $jm_cv_func_working_malloc = no; then
30 LIBOBJS="$LIBOBJS malloc.o"
31 AC_DEFINE_UNQUOTED(malloc, rpl_malloc)