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From dec5f888a457e36d81065ebc69f7d8d966be527d Mon Sep 17 00:00:00 2001
From: Daiki Ueno <dueno@redhat.com>
Date: Thu, 31 May 2018 11:02:51 +0200
Subject: [PATCH] build: Ease issetugid() check when cross-compiling
When cross-compiling, the configure check for issetugid() aborts,
because of the pessimistic default of AC_RUN_IFELSE. This patch
provides the non-pessimistic default to AC_RUN_IFELSE and wrap the
macro invocation with AC_CACHE_CHECK so that the user can override the
check by setting ac_cv_issetugid_openbsd=yes, as suggested in:
https://www.gnu.org/savannah-checkouts/gnu/autoconf/manual/autoconf-2.69/html_node/Runtime.html#Runtime
---
configure.ac | 16 +++++++++-------
1 file changed, 9 insertions(+), 7 deletions(-)
diff --git a/configure.ac b/configure.ac
index e99a3c7..bd6ece0 100644
--- a/configure.ac
+++ b/configure.ac
@@ -115,15 +115,17 @@ if test "$os_unix" = "yes"; then
# Check if issetugid() is available and has compatible behavior with OpenBSD
AC_CHECK_FUNCS([issetugid], [
- AC_MSG_CHECKING([whether issetugid() can detect setuid/setgid])
- issetugid_openbsd=no
- AC_RUN_IFELSE([AC_LANG_PROGRAM([[#include <unistd.h>]],
- [[return issetugid ();]])],
- [chmod 02777 ./conftest$EXEEXT; ./conftest$EXEEXT || issetugid_openbsd=yes])
- if test "$issetugid_openbsd" = yes; then
+ AC_CACHE_CHECK([whether issetugid() can detect setuid/setgid],
+ [ac_cv_issetugid_openbsd],
+ [ac_cv_issetugid_openbsd=no
+ AC_RUN_IFELSE([AC_LANG_PROGRAM([[#include <unistd.h>]],
+ [[return issetugid ();]])],
+ [chmod 02777 ./conftest$EXEEXT; ./conftest$EXEEXT || ac_cv_issetugid_openbsd=yes],
+ [ac_cv_issetugid_openbsd=no],
+ [ac_cv_issetugid_openbsd="guessing no"])])
+ if test "$ac_cv_issetugid_openbsd" = yes; then
AC_DEFINE([HAVE_ISSETUGID_OPENBSD], [1], [Whether issetugid() has compatible behavior with OpenBSD])
fi
- AC_MSG_RESULT([$issetugid_openbsd])
])
# Required functions
--
2.17.1