#serial 1 dnl From Jim Meyering. dnl Determine whether realloc works when both arguments are 0. 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, 0) ? 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 ])