Clang doesn't support some flags that GCC does, so conditionally check the compiler and add them if we are doing a GCC build

common/src/Utilities/CMakeLists.txt

@@ -11,10 +11,7 @@ set(Output Utilities)
 
 # set common flags
 set(CommonFlags 
-	-fno-dse
-	-fno-guess-branch-probability
 	-fno-strict-aliasing
-	-fno-tree-dse
     )
 
 # set optimization flags
@@ -58,6 +55,11 @@ set(OptimizationFlags
 	-ftree-vrp
 	-funit-at-a-time)
 
+#Clang doesn't support a few common flags that GCC does.
+if(NOT USE_CLANG)
+	add_definitions(${CommonFlags} -fno-guess-branch-probability -fno-dse -fno-tree-dse)
+endif(NOT USE_CLANG) 
+
 # Debug - Build
 if(CMAKE_BUILD_TYPE STREQUAL Debug)
 	

common/src/x86emitter/CMakeLists.txt

@@ -11,9 +11,6 @@ set(Output x86emitter)
 
 # set common flags
 set(CommonFlags 
-	-fno-guess-branch-probability
-	-fno-dse
-	-fno-tree-dse
 	-fno-strict-aliasing
     )
 
@@ -58,6 +55,11 @@ set(OptimizationFlags
 	-ftree-vrp
 	-funit-at-a-time)
 
+#Clang doesn't support a few common flags that GCC does.
+if(NOT USE_CLANG)
+	add_definitions(${CommonFlags} -fno-guess-branch-probability -fno-dse -fno-tree-dse)
+endif(NOT USE_CLANG)
+
 # Debug - Build
 if(CMAKE_BUILD_TYPE STREQUAL Debug)
 

pcsx2/CMakeLists.txt

@@ -12,14 +12,12 @@ set(CommonFlags
     # Disable this optimization for the moment
     -fno-omit-frame-pointer 
     # END GCC-4.6
-	-fno-guess-branch-probability
-	-fno-dse
-	-fno-tree-dse
-	-fno-strict-aliasing
+    -fno-strict-aliasing
     -Wno-parentheses
     -Wstrict-aliasing # Allow to track strict aliasing issue.
     -Wno-char-subscripts # only impact svu which is deprecated
     -Wno-missing-braces
+    -Wno-ignored-attributes
 	)
 
 # set optimization flags
@@ -63,6 +61,11 @@ set(OptimizationFlags
 	-ftree-vrp
 	-funit-at-a-time)
 
+#Clang doesn't support a few common flags that GCC does.
+if(NOT USE_CLANG)
+	add_definitions(${CommonFlags} -fno-guess-branch-probability -fno-dse -fno-tree-dse)
+endif(NOT USE_CLANG) 
+
 # Debug - Build
 if(CMAKE_BUILD_TYPE STREQUAL Debug)
     set(Output pcsx2-dbg)

plugins/GSdx/CMakeLists.txt

@@ -12,7 +12,6 @@ set(Output GSdx-0.1.16)
 set(CommonFlags
     -D_LINUX
     -fno-operator-names # because Xbyak uses and()/xor()/or()/not() function
-    -mpreferred-stack-boundary=2
     -mfpmath=sse
     #-Wstrict-aliasing # Allow to track strict aliasing issue.
     -std=c++0x
@@ -27,6 +26,11 @@ set(OptimizationFlags
     -DNDEBUG
     )
 
+#Clang doesn't support a few common flags that GCC does.
+if(NOT USE_CLANG)
+	add_definitions(${CommonFlags} -mpreferred-stack-boundary=2)
+endif(NOT USE_CLANG)
+
 # Debug - Build
 if(CMAKE_BUILD_TYPE STREQUAL Debug)
     add_definitions(${CommonFlags} -D_DEBUG -g -Wall)

plugins/zzogl-pg/opengl/CMakeLists.txt

@@ -16,7 +16,6 @@ set(Output zzogl-0.4.0)
 set(CommonFlags
     -pthread
     -DZEROGS_SSE2
-    -fno-regmove
     -fno-strict-aliasing
     -Wstrict-aliasing # Allow to track strict aliasing issue.
     -Wunused-variable
@@ -27,6 +26,11 @@ set(OptimizationFlags
     -DNDEBUG
     )
 
+#Clang doesn't support a few common flags that GCC does.
+if(NOT USE_CLANG)
+	add_definitions(${CommonFlags} -fno-regmove)
+endif(NOT USE_CLANG) 
+
 # Debug - Build
 if(CMAKE_BUILD_TYPE STREQUAL Debug)
     # add defines