From 318a730c459a8524d7030d261946c35815dd4b29 Mon Sep 17 00:00:00 2001 From: Dmitry Marakasov Date: Mon, 1 Aug 2011 22:17:32 +0400 Subject: [PATCH] Check whether -Wno-unused-but-set-variable is supported before using it. It seems to only be available on recent (>=4.6) versions of gcc. --- src/CMakeLists.txt | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt index ce53651b0..5bdfc7eee 100644 --- a/src/CMakeLists.txt +++ b/src/CMakeLists.txt @@ -209,6 +209,8 @@ endif(BUILD_SERVER) # Set some optimizations and tweaks # +include(CheckCCompilerFlag) + if(MSVC) # Visual Studio @@ -236,7 +238,10 @@ else() endif() if(NOT APPLE) - set(WARNING_FLAGS "${WARNING_FLAGS} -Wno-unused-but-set-variable") + check_c_compiler_flag("-Wno-unused-but-set-variable" HAS_UNUSED_BUT_SET_VARIABLE_WARNING) + if(HAS_UNUSED_BUT_SET_VARIABLE_WARNING) + set(WARNING_FLAGS "${WARNING_FLAGS} -Wno-unused-but-set-variable") + endif(HAS_UNUSED_BUT_SET_VARIABLE_WARNING) endif() if(APPLE) -- 2.25.1