Thanks for the bug report. I installed the following somewhat-different patch.
>From 73c32ee293da657d9f1e3754a017b1c2ba219e4c Mon Sep 17 00:00:00 2001 From: Paul Eggert <egg...@cs.ucla.edu> 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
