#serial 1 dnl From Jim Meyering. dnl Determine whether realloc accepts 0 as its first argument. dnl If it doesn't, arrange to use the replacement function. dnl dnl If you use this macro in a package, you should dnl add the following two lines to acconfig.h: dnl /* Define to rpl_realloc if the replacement function should be used. */ dnl #undef realloc dnl AC_DEFUN(jm_FUNC_REALLOC, [ AC_CACHE_CHECK([for working realloc], jm_cv_func_working_realloc, [AC_TRY_RUN([ char *realloc (); int main () { exit (realloc (0, 1) ? 0 : 1); } ], jm_cv_func_working_realloc=yes, jm_cv_func_working_realloc=no, dnl When crosscompiling, assume realloc is broken. jm_cv_func_working_realloc=no) ]) if test $jm_cv_func_working_realloc = no; then LIBOBJS="$LIBOBJS realloc.o" AC_DEFINE_UNQUOTED(realloc, rpl_realloc) fi ])