From a5344cf7ec237cb0f68c14bca68636f92bfc224b Mon Sep 17 00:00:00 2001
From: Stefano Sabatini <stefano.sabatini-lala@poste.it>
Date: Sun, 12 Oct 2008 09:07:14 +0000
Subject: Implement CPP condition check support in configure.

Originally committed as revision 15597 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 configure | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

(limited to 'configure')

diff --git a/configure b/configure
index 0428454607..f45495ffbd 100755
--- a/configure
+++ b/configure
@@ -527,6 +527,18 @@ int main(int argc, char **argv){
 EOF
 }
 
+check_cpp_condition(){
+    log check_cpp_condition "$@"
+    header=$1
+    condition=$2
+    check_cpp <<EOF
+#include <$header>
+#if !($condition)
+#error "unsatisfied condition: $condition"
+#endif
+EOF
+}
+
 check_lib(){
     log check_lib "$@"
     header="$1"
@@ -614,6 +626,14 @@ require2(){
     check_lib2 "$headers" $func "$@" || die "ERROR: $name not found"
 }
 
+require_cpp_condition(){
+    name="$1"
+    header="$2"
+    cpp_condition="$3"
+    shift 3
+    check_cpp_condition $header "$cpp_condition" || die "ERROR: $name does not satisfy CPP condition: $cpp_condition"
+}
+
 check_foo_config(){
     cfg=$1
     pkg=$2
-- 
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