Mark unused function parameters

[onak.git] / CMakeLists.txt

diff --git a/CMakeLists.txt b/CMakeLists.txt
index f755cf4e6348195ee88af1278c2feea46f5cdc25..30e592969cf60199ed72c82085e098c5fcbfff38 100644 (file)
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -23,6 +23,21 @@ option(KEYD
 set(CMAKE_POSITION_INDEPENDENT_CODE ON)
 TEST_BIG_ENDIAN(WORDS_BIGENDIAN)
 
+include(CheckCSourceCompiles)
+check_c_source_compiles(
+       "
+               #include <stdlib.h>
+               static void f(__attribute__((unused))) {}
+               int main(void) { f(); return 0;}
+       "
+       HAVE___ATTRIBUTE__UNUSED
+)
+if (HAVE___ATTRIBUTE__UNUSED)
+       set(UNUSED_ATTRIB "__attribute__((unused))")
+else()
+       set(UNUSED_ATTRIB "")
+endif()
+
 # Pick up a git based version number for development builds
 find_package(Git)
 if (GIT_FOUND AND EXISTS "${CMAKE_SOURCE_DIR}/.git")