From: Julian Ospald <hasufell@gentoo.org>
Date: Wed Jun 27 22:04:32 UTC 2012
Subject: build system

respect flags

--- CMakeLists.txt
+++ CMakeLists.txt
@@ -365,21 +365,6 @@
 		
 	endif()
 	
-	# Warning level
-	add_cxxflag("-Wall")
-	add_cxxflag("-Wextra")
-	add_cxxflag("-Wformat=2")
-	add_cxxflag("-Wundef")
-	add_cxxflag("-Wpointer-arith")
-	add_cxxflag("-Wcast-qual")
-	add_cxxflag("-Woverloaded-virtual")
-	add_cxxflag("-Wlogical-op")
-	
-	add_cxxflag("-Wliteral-conversion")
-	add_cxxflag("-Wshift-overflow")
-	add_cxxflag("-Woverflow")
-	add_cxxflag("-Wbool-conversions")
-	
 	# TODO enable:
 	# add_cxxflag("-Wconversion") # very noisy
 	# add_cxxflag("-Wsign-conversion") # very noisy
@@ -391,27 +376,12 @@
 	endif()
 	
 	if(CMAKE_BUILD_TYPE STREQUAL "Debug")
-		
-		#Debug
 		add_definitions(-D_DEBUG)
-		
-		check_compiler_flag(RESULT "-g3")
-		if(NOT RESULT STREQUAL "")
-			string(REGEX REPLACE "-g(|[0-9]|gdb)" "" CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG}")
-			set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} ${RESULT}")
-		endif()
-		
-		check_compiler_flag(RESULT "-O0")
-		string(REGEX REPLACE "-O[0-9]" "" CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG}")
-		set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} ${RESULT}")
-		
 	elseif(CMAKE_BUILD_TYPE STREQUAL "Release")
-		
 		if((NOT CMAKE_CXX_FLAGS MATCHES "-g(|[0-9]|gdb)")
 			 AND (NOT CMAKE_CXX_FLAGS_RELEASE MATCHES "-g(|[0-9]|gdb)"))
 			add_cxxflag("-g2")
 		endif()
-		
 	endif()
 	
 	if(DEBUG_EXTRA)
@@ -419,15 +389,7 @@
 		add_cxxflag("-fbounds-checking")
 		add_cxxflag("-fcatch-undefined-behavior")
 		add_cxxflag("-Wstrict-aliasing=1")
-	else()
-		# -Wuninitialized causes too many false positives
-		add_cxxflag("-Wno-uninitialized")
-		# (clang only) Conflicts with using const variables for configuration.
-		add_cxxflag("-Wno-constant-logical-operand")
 	endif()
-	
-	# Because we are lazy
-	add_ldflag("-Wl,--as-needed")
 
 	# Xcode does not support -isystem yet
 	if(${CMAKE_SYSTEM_NAME} MATCHES "Darwin")