diff --git a/code/client/cl_scrn.cpp b/code/client/cl_scrn.cpp
index a0d038d..68d9c8f 100644
--- a/code/client/cl_scrn.cpp
+++ b/code/client/cl_scrn.cpp
@@ -386,7 +386,7 @@ static intStats_t usecGPU;
 
 static void SCR_PerformanceCounters()
 {
-	qbool Sys_V_IsVSynced();
+	extern qbool Sys_V_IsVSynced();
 
 	float x, y, cw = 8, ch = 12;
 	SCR_AdjustFrom640( 0, 0, &cw, &ch );
diff --git a/makefiles/linux_gmake/botlib.make b/makefiles/linux_gmake/botlib.make
index 9569119..d3944b8 100644
--- a/makefiles/linux_gmake/botlib.make
+++ b/makefiles/linux_gmake/botlib.make
@@ -19,7 +19,7 @@ ifeq ($(config),debug_x64)
   INCLUDES +=
   FORCE_INCLUDE +=
   ALL_CPPFLAGS += $(CPPFLAGS) -MMD -MP $(DEFINES) $(INCLUDES)
-  ALL_CFLAGS += $(CFLAGS) $(ALL_CPPFLAGS) -m64 -g -Wno-unused-parameter -Wno-write-strings -Wno-parentheses -Wno-parentheses-equality -Wno-vexing-parse  -std=c++98
+  ALL_CFLAGS += $(CFLAGS) $(ALL_CPPFLAGS) -m64 -g -Wno-unused-parameter -Wno-write-strings -Wno-parentheses -Wno-parentheses-equality  -std=c++98
   ALL_CXXFLAGS += $(CXXFLAGS) $(ALL_CFLAGS) -fno-exceptions -fno-rtti
   ALL_RESFLAGS += $(RESFLAGS) $(DEFINES) $(INCLUDES)
   LIBS +=
@@ -46,7 +46,7 @@ ifeq ($(config),release_x64)
   INCLUDES +=
   FORCE_INCLUDE +=
   ALL_CPPFLAGS += $(CPPFLAGS) -MMD -MP $(DEFINES) $(INCLUDES)
-  ALL_CFLAGS += $(CFLAGS) $(ALL_CPPFLAGS) -m64 -fomit-frame-pointer -ffast-math -Os -g -msse2 -Wno-unused-parameter -Wno-write-strings -Wno-parentheses -Wno-parentheses-equality -Wno-vexing-parse -g1 -std=c++98
+  ALL_CFLAGS += $(CFLAGS) $(ALL_CPPFLAGS) -m64 -fomit-frame-pointer -ffast-math -Os -g -msse2 -Wno-unused-parameter -Wno-write-strings -Wno-parentheses -Wno-parentheses-equality -g1 -std=c++98
   ALL_CXXFLAGS += $(CXXFLAGS) $(ALL_CFLAGS) -fno-exceptions -fno-rtti
   ALL_RESFLAGS += $(RESFLAGS) $(DEFINES) $(INCLUDES)
   LIBS +=
diff --git a/makefiles/linux_gmake/cnq3-server.make b/makefiles/linux_gmake/cnq3-server.make
index 1818cb6..802d99a 100644
--- a/makefiles/linux_gmake/cnq3-server.make
+++ b/makefiles/linux_gmake/cnq3-server.make
@@ -19,7 +19,7 @@ ifeq ($(config),debug_x64)
   INCLUDES +=
   FORCE_INCLUDE +=
   ALL_CPPFLAGS += $(CPPFLAGS) -MMD -MP $(DEFINES) $(INCLUDES)
-  ALL_CFLAGS += $(CFLAGS) $(ALL_CPPFLAGS) -m64 -g -Wno-unused-parameter -Wno-write-strings -Wno-parentheses -Wno-parentheses-equality -Wno-vexing-parse  -x c++ -std=c++98
+  ALL_CFLAGS += $(CFLAGS) $(ALL_CPPFLAGS) -m64 -g -Wno-unused-parameter -Wno-write-strings -Wno-parentheses -Wno-parentheses-equality  -x c++ -std=c++98
   ALL_CXXFLAGS += $(CXXFLAGS) $(ALL_CFLAGS) -fno-exceptions -fno-rtti
   ALL_RESFLAGS += $(RESFLAGS) $(DEFINES) $(INCLUDES)
   LIBS += ../../.build/debug_x64/libbotlib.a -ldl -lm
@@ -50,7 +50,7 @@ ifeq ($(config),release_x64)
   INCLUDES +=
   FORCE_INCLUDE +=
   ALL_CPPFLAGS += $(CPPFLAGS) -MMD -MP $(DEFINES) $(INCLUDES)
-  ALL_CFLAGS += $(CFLAGS) $(ALL_CPPFLAGS) -m64 -fomit-frame-pointer -ffast-math -Os -g -msse2 -Wno-unused-parameter -Wno-write-strings -Wno-parentheses -Wno-parentheses-equality -Wno-vexing-parse -g1 -x c++ -std=c++98
+  ALL_CFLAGS += $(CFLAGS) $(ALL_CPPFLAGS) -m64 -fomit-frame-pointer -ffast-math -Os -g -msse2 -Wno-unused-parameter -Wno-write-strings -Wno-parentheses -Wno-parentheses-equality -g1 -x c++ -std=c++98
   ALL_CXXFLAGS += $(CXXFLAGS) $(ALL_CFLAGS) -fno-exceptions -fno-rtti
   ALL_RESFLAGS += $(RESFLAGS) $(DEFINES) $(INCLUDES)
   LIBS += ../../.build/release_x64/libbotlib.a -ldl -lm
diff --git a/makefiles/linux_gmake/cnq3.make b/makefiles/linux_gmake/cnq3.make
index 65d0826..bc7a087 100644
--- a/makefiles/linux_gmake/cnq3.make
+++ b/makefiles/linux_gmake/cnq3.make
@@ -19,7 +19,7 @@ ifeq ($(config),debug_x64)
   INCLUDES += -I../../code/glew/include
   FORCE_INCLUDE +=
   ALL_CPPFLAGS += $(CPPFLAGS) -MMD -MP $(DEFINES) $(INCLUDES)
-  ALL_CFLAGS += $(CFLAGS) $(ALL_CPPFLAGS) -m64 -g -Wno-unused-parameter -Wno-write-strings -Wno-parentheses -Wno-parentheses-equality -Wno-vexing-parse  -x c++ -std=c++98
+  ALL_CFLAGS += $(CFLAGS) $(ALL_CPPFLAGS) -m64 -g -Wno-unused-parameter -Wno-write-strings -Wno-parentheses -Wno-parentheses-equality  -x c++ -std=c++98
   ALL_CXXFLAGS += $(CXXFLAGS) $(ALL_CFLAGS) -fno-exceptions -fno-rtti
   ALL_RESFLAGS += $(RESFLAGS) $(DEFINES) $(INCLUDES)
   LIBS += ../../.build/debug_x64/libbotlib.a ../../.build/debug_x64/librenderer.a ../../.build/debug_x64/libglew.a ../../.build/debug_x64/liblibjpeg-turbo.a -ldl -lm -lSDL2 -lGL
@@ -50,7 +50,7 @@ ifeq ($(config),release_x64)
   INCLUDES += -I../../code/glew/include
   FORCE_INCLUDE +=
   ALL_CPPFLAGS += $(CPPFLAGS) -MMD -MP $(DEFINES) $(INCLUDES)
-  ALL_CFLAGS += $(CFLAGS) $(ALL_CPPFLAGS) -m64 -fomit-frame-pointer -ffast-math -Os -g -msse2 -Wno-unused-parameter -Wno-write-strings -Wno-parentheses -Wno-parentheses-equality -Wno-vexing-parse -g1 -x c++ -std=c++98
+  ALL_CFLAGS += $(CFLAGS) $(ALL_CPPFLAGS) -m64 -fomit-frame-pointer -ffast-math -Os -g -msse2 -Wno-unused-parameter -Wno-write-strings -Wno-parentheses -Wno-parentheses-equality -g1 -x c++ -std=c++98
   ALL_CXXFLAGS += $(CXXFLAGS) $(ALL_CFLAGS) -fno-exceptions -fno-rtti
   ALL_RESFLAGS += $(RESFLAGS) $(DEFINES) $(INCLUDES)
   LIBS += ../../.build/release_x64/libbotlib.a ../../.build/release_x64/librenderer.a ../../.build/release_x64/libglew.a ../../.build/release_x64/liblibjpeg-turbo.a -ldl -lm -lSDL2 -lGL
diff --git a/makefiles/linux_gmake/glew.make b/makefiles/linux_gmake/glew.make
index 014d2b2..ca46ce6 100644
--- a/makefiles/linux_gmake/glew.make
+++ b/makefiles/linux_gmake/glew.make
@@ -19,7 +19,7 @@ ifeq ($(config),debug_x64)
   INCLUDES += -I../../code/glew/include
   FORCE_INCLUDE +=
   ALL_CPPFLAGS += $(CPPFLAGS) -MMD -MP $(DEFINES) $(INCLUDES)
-  ALL_CFLAGS += $(CFLAGS) $(ALL_CPPFLAGS) -m64 -g -Wno-unused-parameter -Wno-write-strings -Wno-parentheses -Wno-parentheses-equality -Wno-vexing-parse 
+  ALL_CFLAGS += $(CFLAGS) $(ALL_CPPFLAGS) -m64 -g -Wno-unused-parameter -Wno-write-strings -Wno-parentheses -Wno-parentheses-equality 
   ALL_CXXFLAGS += $(CXXFLAGS) $(ALL_CFLAGS) -fno-exceptions -fno-rtti
   ALL_RESFLAGS += $(RESFLAGS) $(DEFINES) $(INCLUDES)
   LIBS +=
@@ -46,7 +46,7 @@ ifeq ($(config),release_x64)
   INCLUDES += -I../../code/glew/include
   FORCE_INCLUDE +=
   ALL_CPPFLAGS += $(CPPFLAGS) -MMD -MP $(DEFINES) $(INCLUDES)
-  ALL_CFLAGS += $(CFLAGS) $(ALL_CPPFLAGS) -m64 -fomit-frame-pointer -ffast-math -Os -g -msse2 -Wno-unused-parameter -Wno-write-strings -Wno-parentheses -Wno-parentheses-equality -Wno-vexing-parse -g1
+  ALL_CFLAGS += $(CFLAGS) $(ALL_CPPFLAGS) -m64 -fomit-frame-pointer -ffast-math -Os -g -msse2 -Wno-unused-parameter -Wno-write-strings -Wno-parentheses -Wno-parentheses-equality -g1
   ALL_CXXFLAGS += $(CXXFLAGS) $(ALL_CFLAGS) -fno-exceptions -fno-rtti
   ALL_RESFLAGS += $(RESFLAGS) $(DEFINES) $(INCLUDES)
   LIBS +=
diff --git a/makefiles/linux_gmake/libjpeg-turbo.make b/makefiles/linux_gmake/libjpeg-turbo.make
index 383d7b1..6d9e9d1 100644
--- a/makefiles/linux_gmake/libjpeg-turbo.make
+++ b/makefiles/linux_gmake/libjpeg-turbo.make
@@ -19,7 +19,7 @@ ifeq ($(config),debug_x64)
   INCLUDES += -I../../code/libjpeg-turbo -I../../code/libjpeg-turbo/simd
   FORCE_INCLUDE +=
   ALL_CPPFLAGS += $(CPPFLAGS) -MMD -MP $(DEFINES) $(INCLUDES)
-  ALL_CFLAGS += $(CFLAGS) $(ALL_CPPFLAGS) -m64 -g -Wno-unused-parameter -Wno-write-strings -Wno-parentheses -Wno-parentheses-equality -Wno-vexing-parse 
+  ALL_CFLAGS += $(CFLAGS) $(ALL_CPPFLAGS) -m64 -g -Wno-unused-parameter -Wno-write-strings -Wno-parentheses -Wno-parentheses-equality 
   ALL_CXXFLAGS += $(CXXFLAGS) $(ALL_CFLAGS) -fno-exceptions -fno-rtti
   ALL_RESFLAGS += $(RESFLAGS) $(DEFINES) $(INCLUDES)
   LIBS +=
@@ -46,7 +46,7 @@ ifeq ($(config),release_x64)
   INCLUDES += -I../../code/libjpeg-turbo -I../../code/libjpeg-turbo/simd
   FORCE_INCLUDE +=
   ALL_CPPFLAGS += $(CPPFLAGS) -MMD -MP $(DEFINES) $(INCLUDES)
-  ALL_CFLAGS += $(CFLAGS) $(ALL_CPPFLAGS) -m64 -fomit-frame-pointer -ffast-math -Os -g -msse2 -Wno-unused-parameter -Wno-write-strings -Wno-parentheses -Wno-parentheses-equality -Wno-vexing-parse -g1
+  ALL_CFLAGS += $(CFLAGS) $(ALL_CPPFLAGS) -m64 -fomit-frame-pointer -ffast-math -Os -g -msse2 -Wno-unused-parameter -Wno-write-strings -Wno-parentheses -Wno-parentheses-equality -g1
   ALL_CXXFLAGS += $(CXXFLAGS) $(ALL_CFLAGS) -fno-exceptions -fno-rtti
   ALL_RESFLAGS += $(RESFLAGS) $(DEFINES) $(INCLUDES)
   LIBS +=
diff --git a/makefiles/linux_gmake/renderer.make b/makefiles/linux_gmake/renderer.make
index 6655d31..960adde 100644
--- a/makefiles/linux_gmake/renderer.make
+++ b/makefiles/linux_gmake/renderer.make
@@ -19,7 +19,7 @@ ifeq ($(config),debug_x64)
   INCLUDES += -I../../code/glew/include
   FORCE_INCLUDE +=
   ALL_CPPFLAGS += $(CPPFLAGS) -MMD -MP $(DEFINES) $(INCLUDES)
-  ALL_CFLAGS += $(CFLAGS) $(ALL_CPPFLAGS) -m64 -g -Wno-unused-parameter -Wno-write-strings -Wno-parentheses -Wno-parentheses-equality -Wno-vexing-parse  -std=c++98
+  ALL_CFLAGS += $(CFLAGS) $(ALL_CPPFLAGS) -m64 -g -Wno-unused-parameter -Wno-write-strings -Wno-parentheses -Wno-parentheses-equality  -std=c++98
   ALL_CXXFLAGS += $(CXXFLAGS) $(ALL_CFLAGS) -fno-exceptions -fno-rtti
   ALL_RESFLAGS += $(RESFLAGS) $(DEFINES) $(INCLUDES)
   LIBS +=
@@ -46,7 +46,7 @@ ifeq ($(config),release_x64)
   INCLUDES += -I../../code/glew/include
   FORCE_INCLUDE +=
   ALL_CPPFLAGS += $(CPPFLAGS) -MMD -MP $(DEFINES) $(INCLUDES)
-  ALL_CFLAGS += $(CFLAGS) $(ALL_CPPFLAGS) -m64 -fomit-frame-pointer -ffast-math -Os -g -msse2 -Wno-unused-parameter -Wno-write-strings -Wno-parentheses -Wno-parentheses-equality -Wno-vexing-parse -g1 -std=c++98
+  ALL_CFLAGS += $(CFLAGS) $(ALL_CPPFLAGS) -m64 -fomit-frame-pointer -ffast-math -Os -g -msse2 -Wno-unused-parameter -Wno-write-strings -Wno-parentheses -Wno-parentheses-equality -g1 -std=c++98
   ALL_CXXFLAGS += $(CXXFLAGS) $(ALL_CFLAGS) -fno-exceptions -fno-rtti
   ALL_RESFLAGS += $(RESFLAGS) $(DEFINES) $(INCLUDES)
   LIBS +=
diff --git a/makefiles/premake5.lua b/makefiles/premake5.lua
index 0de8b6a..5164653 100644
--- a/makefiles/premake5.lua
+++ b/makefiles/premake5.lua
@@ -264,7 +264,7 @@ local function ApplyProjectSettings(outputExe)
 		buildoptions { "/wd4267" }
 
 	--
-	-- GCC
+	-- GCC / Clang
 	--
 
 	-- "-g1" is the minimum amount of debug information
@@ -277,8 +277,7 @@ local function ApplyProjectSettings(outputExe)
 			"-Wno-unused-parameter",
 			"-Wno-write-strings",
 			"-Wno-parentheses",
-			"-Wno-parentheses-equality",
-			"-Wno-vexing-parse"
+			"-Wno-parentheses-equality"
 		}
 		linkoptions { "" }