[FFmpeg-cvslog] configure: Fix ARM thumb detection

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Tue Dec  4 05:35:11 2012 +0100| [400647f9ba6a65e45dbdd57ee05560758cfafdec] | committer: Michael Niedermayer

configure: Fix ARM thumb detection

The detection detects the default but not if it even works.
Check building a simple piece of code and disable thumb if it fails
This fixes a compile failure

If someone has a better idea, just replace this by it!

Signed-off-by: Michael Niedermayer <michaelni at gmx.at>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=400647f9ba6a65e45dbdd57ee05560758cfafdec
---

 configure |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/configure b/configure
index 2628035..6dda93d 100755
--- a/configure
+++ b/configure
@@ -3424,7 +3424,10 @@ if enabled alpha; then
 
 elif enabled arm; then
 
-    check_cpp_condition stddef.h "defined __thumb__" && enable_weak thumb
+    check_cpp_condition stddef.h "defined __thumb__" && check_cc <<EOF && enable_weak thumb
+float func(float a, float b){ return a+b; }
+EOF
+
     enabled thumb && check_cflags -mthumb || check_cflags -marm
     nogas=die