From 6f006e50dc2cff6ba8b316640d769db1ac08e2ca Mon Sep 17 00:00:00 2001
From: Andrey Pavlenko <andrey.pavlenko@itseez.com>
Date: Fri, 31 May 2013 18:58:30 +0400
Subject: [PATCH] setting 'char' to be signed by default since some tests fail
 when it's wrong (e.g. native compilation on ARM Linux)

---
 cmake/OpenCVCompilerOptions.cmake | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/cmake/OpenCVCompilerOptions.cmake b/cmake/OpenCVCompilerOptions.cmake
index aeed112ae0..bded2d41fe 100644
--- a/cmake/OpenCVCompilerOptions.cmake
+++ b/cmake/OpenCVCompilerOptions.cmake
@@ -47,6 +47,9 @@ macro(add_extra_compiler_option option)
   endif()
 endmacro()
 
+# some OpenCV tests fail when 'char' is 'unsigned' by default
+add_extra_compiler_option(-fsigned-char)
+
 if(MINGW)
   # http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40838
   # here we are trying to workaround the problem