diff --git a/bzip2/CMakeLists.txt b/bzip2/CMakeLists.txt
index 5c1255604..f96c97a8f 100644
--- a/bzip2/CMakeLists.txt
+++ b/bzip2/CMakeLists.txt
@@ -1,7 +1,7 @@
 cmake_minimum_required( VERSION 2.4 )
 
 if( CMAKE_COMPILER_IS_GNUC )
-	set( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wextra -fomit-frame-pointer" )
+	set( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wextra -fomit-frame-pointer -Wshadow -Wfloat-equal -Wcast-qual" )
 endif( CMAKE_COMPILER_IS_GNUC )
 
 add_definitions( -DBZ_NO_STDIO )
diff --git a/dumb/CMakeLists.txt b/dumb/CMakeLists.txt
index c2cbe8d1b..82504e2fa 100644
--- a/dumb/CMakeLists.txt
+++ b/dumb/CMakeLists.txt
@@ -12,7 +12,7 @@ endif( NOT CMAKE_BUILD_TYPE MATCHES "Release" )
 set( CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} -D_DEBUG -DDEBUGMODE=1" )
 
 if( CMAKE_COMPILER_IS_GNUC )
-	set( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wno-pointer-sign -Wno-uninitialized" )
+	set( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wextra -Wno-pointer-sign -Wno-uninitialized -Wshadow -Wfloat-equal -Wcast-qual" )
 endif( CMAKE_COMPILER_IS_GNUC )
 
 CHECK_FUNCTION_EXISTS( itoa ITOA_EXISTS )
diff --git a/game-music-emu/CMakeLists.txt b/game-music-emu/CMakeLists.txt
index 7905f847a..1f171c490 100644
--- a/game-music-emu/CMakeLists.txt
+++ b/game-music-emu/CMakeLists.txt
@@ -7,7 +7,7 @@ if( NOT CMAKE_BUILD_TYPE MATCHES "Release" )
 endif( NOT CMAKE_BUILD_TYPE MATCHES "Release" )
 
 if( CMAKE_COMPILER_IS_GNUCXX )
-	set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra" )
+	set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra -Wshadow -Wfloat-equal -Wcast-qual" )
 	if( NOT PROFILE )
 		set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fomit-frame-pointer" )
 	endif( NOT PROFILE )
diff --git a/gdtoa/CMakeLists.txt b/gdtoa/CMakeLists.txt
index 6fc394d8d..bfb60fd10 100644
--- a/gdtoa/CMakeLists.txt
+++ b/gdtoa/CMakeLists.txt
@@ -9,7 +9,7 @@ if( MSVC )
 endif( MSVC )
 
 if( CMAKE_COMPILER_IS_GNUCXX )
-	set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra" )
+	set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra -Wshadow -Wfloat-equal -Wcast-qual" )
 endif( CMAKE_COMPILER_IS_GNUCXX )
 
 include_directories( ${CMAKE_CURRENT_BINARY_DIR} )
diff --git a/jpeg-6b/CMakeLists.txt b/jpeg-6b/CMakeLists.txt
index c3a5f458c..557d70731 100644
--- a/jpeg-6b/CMakeLists.txt
+++ b/jpeg-6b/CMakeLists.txt
@@ -1,7 +1,7 @@
 cmake_minimum_required( VERSION 2.4 )
 
 if( CMAKE_COMPILER_IS_GNUC )
-	set( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wextra -fomit-frame-pointer" )
+	set( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wextra -Wshadow -Wfloat-equal -Wcast-qual -fomit-frame-pointer" )
 endif( CMAKE_COMPILER_IS_GNUC )
 
 add_library( jpeg
diff --git a/lzma/CMakeLists.txt b/lzma/CMakeLists.txt
index 6a2561c68..49bec8733 100644
--- a/lzma/CMakeLists.txt
+++ b/lzma/CMakeLists.txt
@@ -1,7 +1,7 @@
 cmake_minimum_required( VERSION 2.4 )
 
 if( CMAKE_COMPILER_IS_GNUC )
-	set( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wextra -fomit-frame-pointer" )
+	set( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wextra -Wshadow -Wfloat-equal -Wcast-qual -fomit-frame-pointer" )
 endif( CMAKE_COMPILER_IS_GNUC )
 
 set( LZMA_FILES
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 31bf2e6fc..6064e202f 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -394,7 +394,7 @@ if( CMAKE_COMPILER_IS_GNUCXX )
 	set( CMAKE_CXX_FLAGS_MINSIZEREL "${CMAKE_CXX_FLAGS_MINSIZEREL} ${REL_CXX_FLAGS}" )
 	set( CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO} ${REL_CXX_FLAGS}" )
 
-	set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wno-unused -Wextra -Wno-missing-field-initializers" )
+	set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wno-unused -Wextra -Wno-missing-field-initializers -Wshadow -Wfloat-equal -Wcast-qual" )
 
 	# Remove extra warnings when using the official DirectX headers.
 	# Also, TDM-GCC 4.4.0 no longer accepts glibc-style printf formats as valid,