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Re: AC_FUNC_SETPGRP fails to work properly when cross-compiling
From: |
Paul Eggert |
Subject: |
Re: AC_FUNC_SETPGRP fails to work properly when cross-compiling |
Date: |
Wed, 13 Feb 2013 23:29:52 -0800 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130106 Thunderbird/17.0.2 |
Thanks for the bug report. I installed the following
somewhat-different patch.
>From 73c32ee293da657d9f1e3754a017b1c2ba219e4c Mon Sep 17 00:00:00 2001
From: Paul Eggert <address@hidden>
Date: Wed, 13 Feb 2013 23:28:21 -0800
Subject: [PATCH] AC_FUNC_SETPGRP: work even when cross-compiling
* lib/autoconf/functions.m4 (AC_FUNC_SETPGRP):
Use AC_COMPILE_IFELSE rather than AC_RUN_IFELSE.
Problem reported by Alvaro Soliverez in
<http://lists.gnu.org/archive/html/bug-autoconf/2013-02/msg00002.html>.
---
lib/autoconf/functions.m4 | 16 +++++++---------
1 file changed, 7 insertions(+), 9 deletions(-)
diff --git a/lib/autoconf/functions.m4 b/lib/autoconf/functions.m4
index 05f59bd..1b56641 100644
--- a/lib/autoconf/functions.m4
+++ b/lib/autoconf/functions.m4
@@ -1518,15 +1518,13 @@ rm -f conftest*
# ---------------
AC_DEFUN([AC_FUNC_SETPGRP],
[AC_CACHE_CHECK(whether setpgrp takes no argument, ac_cv_func_setpgrp_void,
-[AC_RUN_IFELSE(
-[AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT],
-[/* If this system has a BSD-style setpgrp which takes arguments,
- setpgrp(1, 1) will fail with ESRCH and return -1, in that case
- exit successfully. */
- return setpgrp (1,1) != -1;])],
- [ac_cv_func_setpgrp_void=no],
- [ac_cv_func_setpgrp_void=yes],
- [AC_MSG_ERROR([cannot check setpgrp when cross compiling])])])
+ [AC_COMPILE_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[#include <unistd.h>
+ static int (*p) (void) = setpgrp;]],
+ [[return setpgrp ();]])],
+ [ac_cv_func_setpgrp_void=yes],
+ [ac_cv_func_setpgrp_void=no])])
if test $ac_cv_func_setpgrp_void = yes; then
AC_DEFINE(SETPGRP_VOID, 1,
[Define to 1 if the `setpgrp' function takes no argument.])
--
1.7.11.7