X-Git-Url: https://the.earth.li/gitweb/?a=blobdiff_plain;f=CMakeLists.txt;h=30e592969cf60199ed72c82085e098c5fcbfff38;hb=b767e3e90280a1222fc4404cbd4c832342c9382d;hp=f755cf4e6348195ee88af1278c2feea46f5cdc25;hpb=e82fd57b92d94287f728e37a3e17aaab11b722b8;p=onak.git

diff --git a/CMakeLists.txt b/CMakeLists.txt
index f755cf4..30e5929 100644
--- 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")