# Configure template for GNU m4. # Copyright (C) 1991, 1993, 1994 Free Software Foundation, Inc. # Process this file with autoconf to produce a configure script. undefine([changeword]) AC_INIT(src/m4.c) AC_CONFIG_HEADER(config.h) AC_ARG_PROGRAM PRODUCT=m4 VERSION=1.4 AC_DEFINE_UNQUOTED(PRODUCT, "$PRODUCT") AC_DEFINE_UNQUOTED(VERSION, "$VERSION") AC_SUBST(PRODUCT) AC_SUBST(VERSION) AC_PROG_AWK AC_PROG_CC AC_PROG_INSTALL AC_PROG_MAKE_SET AC_PROG_RANLIB AC_AIX AC_ISC_POSIX AC_MINIX fp_C_PROTOTYPES AC_C_CONST AC_CHECK_HEADERS(limits.h memory.h siginfo.h string.h unistd.h) AC_HEADER_STDC AC_TYPE_SIGNAL AC_TYPE_SIZE_T AC_CHECK_FUNCS(mkstemp sigaction sigaltstack sigstack sigvec strerror tmpfile) AC_FUNC_ALLOCA AC_FUNC_VPRINTF AC_REPLACE_FUNCS(strtol) AC_MSG_CHECKING(ecvt declaration) AC_EGREP_HEADER(ecvt, stdlib.h, [AC_MSG_RESULT(yes); AC_DEFINE(HAVE_EFGCVT, 2)], [AC_MSG_RESULT(no); AC_CHECK_FUNCS(ecvt)]) AC_MSG_CHECKING(if stack overflow is detectable) # Code from Jim Avera <jima@netcom.com>. # stackovf.c requires: # 1. Either sigaction with SA_ONSTACK, or sigvec with SV_ONSTACK # 2. Either sigaltstack or sigstack # 3. getrlimit, including support for RLIMIT_STACK use_stackovf=no if test "$ac_cv_func_sigaction" = yes || test "$ac_cv_func_sigvec" = yes; then if test "$ac_cv_func_sigaltstack" = yes || test "$ac_cv_func_sigstack" = yes; then AC_TRY_LINK([#include <sys/time.h> #include <sys/resource.h> #include <signal.h>], [struct rlimit r; int i; getrlimit (RLIMIT_STACK, &r) #if (!defined(HAVE_SIGACTION) || !defined(SA_ONSTACK)) \ && (!defined(HAVE_SIGVEC) || !defined(SV_ONSTACK)) choke me /* SA_ONSTACK and/or SV_ONSTACK are not defined */ #endif], use_stackovf=yes) fi fi AC_MSG_RESULT($use_stackovf) if test "$use_stackovf" = yes; then AC_DEFINE(USE_STACKOVF) STACKOVF=stackovf.${U}o AC_SUBST(STACKOVF) AC_EGREP_HEADER(rlim_t, sys/resource.h, , AC_DEFINE(rlim_t, int)) AC_EGREP_HEADER(stack_t, signal.h, , AC_DEFINE(stack_t, struct sigaltstack)) AC_EGREP_HEADER(sigcontext, signal.h, AC_DEFINE(HAVE_SIGCONTEXT)) fi AC_MSG_CHECKING(if changeword is wanted) AC_ARG_ENABLE(changeword, [ --enable-changeword enable -W and changeword() builtin], [if test "$enableval" = yes; then AC_MSG_RESULT(yes) AC_DEFINE(ENABLE_CHANGEWORD) else AC_MSG_RESULT(no) fi], [AC_MSG_RESULT(no)]) fp_WITH_DMALLOC AC_OUTPUT(Makefile doc/Makefile lib/Makefile src/Makefile \ checks/Makefile examples/Makefile, [test -z "$CONFIG_HEADERS" || date > stamp-h])