File openomf-set-cflags.patch of Package openomf

diff --git a/CMakeLists.txt b/CMakeLists.txt
index c7459eb..f67a6b7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -21,7 +21,7 @@ OPTION(USE_SUBMODULES "Add libsd as submodule" ON)
 OPTION(USE_SANITIZERS "Enable Asan and Ubsan" OFF)
 
 # These flags are used for all builds
-set(CMAKE_C_FLAGS "-Wall")
+set(CMAKE_C_FLAGS "-Wall -fcommon")
 set(CMAKE_C_FLAGS_DEBUG "-ggdb -DDEBUGMODE -Werror -fno-omit-frame-pointer")
 set(CMAKE_C_FLAGS_RELWITHDEBINFO "-g -O2 -fno-omit-frame-pointer -DNDEBUG")
 set(CMAKE_C_FLAGS_RELEASE "-O2 -DNDEBUG")