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From ae32c3902a1afe2f900ec5e42a1070c8c7fce83b Mon Sep 17 00:00:00 2001
From: John Carr <john.carr@unrouted.co.uk>
Date: Tue, 3 Nov 2009 01:18:26 +0000
Subject: [PATCH 1/2] Add AC_CACHE_CHECK magic around ioprio checking.
Having the cache check allows the end user to set whether ioprio
is available or not. Without this cross-compilation is not
possible as there is no way to run the test program.
---
configure.ac | 24 +++++++++++-------------
1 files changed, 11 insertions(+), 13 deletions(-)
diff --git a/configure.ac b/configure.ac
index 441b4b8..fca54b9 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1164,17 +1164,15 @@ AM_CONDITIONAL(HAVE_LIBVORBIS, test "x$have_libvorbis" = "xyes")
# Check ioprio support
####################################################################
-AC_MSG_CHECKING([[ioprio support]])
-have_ioprio=no
-
-AC_RUN_IFELSE(
-[AC_LANG_PROGRAM([[
+AC_CACHE_CHECK([if we have ioprio],[tracker_cv_have_ioprio],
+ [AC_RUN_IFELSE(
+ [AC_LANG_PROGRAM([[
#include <stdlib.h>
#include <errno.h>
#include <sys/syscall.h>
#include <unistd.h>
-]],
-[[
+ ]],
+ [[
inline int ioprio_get (int which, int who)
{
return syscall (__NR_ioprio_get, which, who);
@@ -1184,16 +1182,16 @@ AC_RUN_IFELSE(
{
return ioprio_get (1, 0);
}
-]]
-)],
-[have_ioprio=yes],[])
+ ]])],
+ [tracker_cv_have_ioprio=yes],
+ [tracker_cv_have_ioprio=no],
+ [AC_MSG_ERROR([cross-compiling: please set 'tracker_cv_have_ioprio'])])
+ ])
-if test "$have_ioprio" = "yes" ; then
+if test "x$tracker_cv_have_ioprio" = "xyes" ; then
AC_DEFINE(HAVE_IOPRIO, 1, [Define if we have ioprio])
fi
-AC_MSG_RESULT([$have_ioprio])
-
##################################################################
# Check for exempi
##################################################################
--
1.6.3.3
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