Add C++ support to the build system, from Scott A. Colcord.

git-svn-id: svn://svn.code.sf.net/p/sc2/code/trunk@3747 8092fc87-c524-0410-9efc-e669fe64eaf9

sc2/build/unix/build.config

@@ -10,6 +10,7 @@ uqm_requirements()
 {
 	# Some requirements:
 	have_build_tools_language C || exit 1
+	have_build_tools_language CXX || exit 1
 	have_build_tool LINK || exit 1
 	case "$HOST_SYSTEM" in
 		MINGW32*|cegcc)
@@ -108,16 +109,16 @@ uqm_prepare_config()
 	nodebug_action() {
 		case "$HOST_SYSTEM" in
 			WINSCW)
-				CFLAGS="$CFLAGS -O2 -d NDEBUG"
+				CCOMMONFLAGS="$CCOMMONFLAGS -O2 -d NDEBUG"
 				;;						
 			ARMV5)
-				CFLAGS="$CFLAGS -O3 -Otime -DNDEBUG"
+				CCOMMONFLAGS="$CCOMMONFLAGS -O3 -Otime -DNDEBUG"
 				;;
 			GCCE)
-				CFLAGS="$CFLAGS -O3 -DNDEBUG"
+				CCOMMONFLAGS="$CCOMMONFLAGS -O3 -DNDEBUG"
 				;;				
 			*)
-				CFLAGS="$CFLAGS -O3 -DNDEBUG"
+				CCOMMONFLAGS="$CCOMMONFLAGS -O3 -DNDEBUG"
 				;;	
 		esac	
 		DEBUG=0
@@ -127,13 +128,13 @@ uqm_prepare_config()
 	debug_action() {
 		case "$HOST_SYSTEM" in
 			WINSCW)
-				CFLAGS="$CFLAGS -g -O0 -W all -d DEBUG -d _DEBUG"
+				CCOMMONFLAGS="$CCOMMONFLAGS -g -O0 -W all -d DEBUG -d _DEBUG"
 				;;
 			ARMV5|GCCE)
-				CFLAGS="$CFLAGS -g -O0 -DDEBUG -D_DEBUG"
+				CCOMMONFLAGS="$CCOMMONFLAGS -g -O0 -DDEBUG -D_DEBUG"
 				;;
 			*)
-				CFLAGS="$CFLAGS -g -O0 -W -Wall -DDEBUG"
+				CCOMMONFLAGS="$CCOMMONFLAGS -g -O0 -W -Wall -DDEBUG"
 				LDFLAGS="$LDFLAGS -O0"
 				;;	
 		esac
@@ -144,43 +145,46 @@ uqm_prepare_config()
 	strictdebug_action() {
 		case "$HOST_SYSTEM" in
 			WINSCW)
-				CFLAGS="$CFLAGS -g -O0 -W all -d DEBUG -d _DEBUG"
+				CCOMMONFLAGS="$CCOMMONFLAGS -g -O0 -W all -d DEBUG -d _DEBUG"
 				;;
 			ARMV5|GCCE)
-				CFLAGS="$CFLAGS -g -O0 -DDEBUG -D_DEBUG"
+				CCOMMONFLAGS="$CCOMMONFLAGS -g -O0 -DDEBUG -D_DEBUG"
 				;;
 			*)
-				CFLAGS="$CFLAGS -g -O0 -DDEBUG -W -Wall"
-#				CFLAGS="$CFLAGS -O1"
+				CCOMMONFLAGS="$CCOMMONFLAGS -g -O0 -DDEBUG -W -Wall"
+#				CCOMMONFLAGS="$CCOMMONFLAGS -O1"
 						# This is needed for -Wunitialized with gcc 3.4
-				CFLAGS="$CFLAGS -Wbad-function-cast -Wcast-qual -Wmissing-prototypes \
-						-Wstrict-prototypes -Wmissing-declarations \
+				CCOMMONFLAGS="$CCOMMONFLAGS -Wcast-qual -Wmissing-declarations \
 						-Wwrite-strings -Wimplicit -Wreturn-type -Wformat \
 						-Wswitch -Wcomment -Wchar-subscripts \
-						-Wparentheses -Wcast-align \
-						-Wuninitialized"
+						-Wparentheses -Wcast-align -Wuninitialized"
+				CFLAGS="$CFLAGS -Wbad-function-cast -Wmissing-prototypes \
+						-Wstrict-prototypes"
+						# CFLAGS is for flags not valid in C++.
 				CFLAGS="$CFLAGS -Wdeclaration-after-statement"
 						# Until we abandon MSVC 6
-#				CFLAGS="$CFLAGS -Waggregate-return"
+#				CCOMMONFLAGS="$CCOMMONFLAGS -Waggregate-return"
 						# It's not unreasonable to return structs at times.
-#				CFLAGS="$CFLAGS "-Wpointer-arith"
+#				CCOMMONFLAGS="$CCOMMONFLAGS "-Wpointer-arith"
 						# Some standard header won't even compile with this on
-#				CFLAGS="$CFLAGS -Wshadow"
+#				CCOMMONFLAGS="$CCOMMONFLAGS -Wshadow"
 						# This gives absurd conflicts with standard files,
 						# like from 'y0 and y1'
-#				CFLAGS="$CFLAGS -Werror"
+#				CCOMMONFLAGS="$CCOMMONFLAGS -Werror"
 						# We shouldn't do this until we actually nail them
 						# all in the original code.  Then we can enforce them
 						# on ourselves.
-#				CFLAGS="$CFLAGS -pedantic-errors -ansi -trigraphs"  # ANSI
-#				CFLAGS="$CFLAGS -Wnested-externs"
+#				CCOMMONFLAGS="$CCOMMONFLAGS -pedantic-errors -ansi -trigraphs"  # ANSI
+#				CCOMMONFLAGS="$CCOMMONFLAGS -Wnested-externs"
 						# We know they're in the code, and though we'd like to
 						# get rid of them, they're not bugs.
-#				CFLAGS="$CFLAGS -Winline"
+#				CCOMMONFLAGS="$CCOMMONFLAGS -Winline"
 						# This gives too many warnings which we can do nothing
 						# about, obscuring legitimate warnings.
 				CFLAGS=`echo $CFLAGS`
-						# Remove all the unnecessary spaces from $CFLAGS,
+				CXXFLAGS=`echo $CXXFLAGS`
+				CCOMMONFLAGS=`echo $CCOMMONFLAGS`
+						# Remove all the unnecessary spaces from the flags vars
 						# for more readable messages.
 				LDFLAGS="$LDFLAGS -O0"
 				;;
@@ -202,7 +206,7 @@ uqm_prepare_config()
 	CHOICE_graphics_OPTION_pure_TITLE="Don't include OpenGL graphics support"
 	CHOICE_graphics_OPTION_pure_ACTION='graphics_pure_action'
 	graphics_pure_action() {
-		CFLAGS="$CFLAGS -DGFXMODULE_SDL"
+		CCOMMONFLAGS="$CCOMMONFLAGS -DGFXMODULE_SDL"
 		GFXMODULE=sdl
 		HAVE_OPENGL=0
 	}
@@ -210,7 +214,7 @@ uqm_prepare_config()
 	CHOICE_graphics_OPTION_opengl_ACTION='graphics_opengl_action'
 	CHOICE_graphics_OPTION_opengl_PRECOND="have_library opengl"
 	graphics_opengl_action() {
-		CFLAGS="$CFLAGS -DGFXMODULE_SDL -DHAVE_OPENGL"
+		CCOMMONFLAGS="$CCOMMONFLAGS -DGFXMODULE_SDL -DHAVE_OPENGL"
 		GFXMODULE=sdl
 		HAVE_OPENGL=1
 		use_library opengl
@@ -228,7 +232,7 @@ uqm_prepare_config()
 	CHOICE_sound_OPTION_openal_PRECOND="have_library openal"
 	CHOICE_sound_OPTION_openal_ACTION=sound_openal_action
 	sound_openal_action() {
-		CFLAGS="$CFLAGS -DHAVE_OPENAL"
+		CCOMMONFLAGS="$CCOMMONFLAGS -DHAVE_OPENAL"
 		SOUNDMODULE=openal
 		use_library openal
 	}
@@ -249,14 +253,14 @@ uqm_prepare_config()
 	CHOICE_ovcodec_OPTION_tremor_PRECOND="have_library tremor"
 	CHOICE_ovcodec_OPTION_tremor_ACTION=ovcodec_tremor_action
 	ovcodec_tremor_action() {
-		CFLAGS="$CFLAGS -DOVCODEC_TREMOR"
+		CCOMMONFLAGS="$CCOMMONFLAGS -DOVCODEC_TREMOR"
 		OGGVORBIS=tremor
 		use_library tremor
 	}
 	CHOICE_ovcodec_OPTION_none_TITLE="No Ogg Vorbis support"
 	CHOICE_ovcodec_OPTION_none_ACTION=ovcodec_none_action
 	ovcodec_none_action() {
-		CFLAGS="$CFLAGS -DOVCODEC_NONE"
+		CCOMMONFLAGS="$CCOMMONFLAGS -DOVCODEC_NONE"
 		OGGVORBIS=none
 	}
 	CHOICE_ovcodec_DEFAULT=standard
@@ -266,7 +270,7 @@ uqm_prepare_config()
 	CHOICE_mikmod_OPTION_internal_TITLE="Included libmikmod"
 	CHOICE_mikmod_OPTION_internal_ACTION=mikmod_internal_action
 	mikmod_internal_action() {
-		CFLAGS="$CFLAGS -DUSE_INTERNAL_MIKMOD"
+		CCOMMONFLAGS="$CCOMMONFLAGS -DUSE_INTERNAL_MIKMOD"
 		USE_INTERNAL_MIKMOD=1
 	}
 	CHOICE_mikmod_OPTION_external_TITLE="System libmikmod"
@@ -285,7 +289,7 @@ uqm_prepare_config()
 			# TODO: Check whether SDL has joystick support.
 	CHOICE_joystick_OPTION_enabled_ACTION=joystick_enabled_action
 	joystick_enabled_action() {
-		CFLAGS="$CFLAGS -DHAVE_JOYSTICK"
+		CCOMMONFLAGS="$CCOMMONFLAGS -DHAVE_JOYSTICK"
 	}
 	CHOICE_joystick_OPTION_disabled_TITLE="disabled"
 	case "$HOST_SYSTEM" in
@@ -309,7 +313,7 @@ uqm_prepare_config()
 	CHOICE_netplay_OPTION_full_PRECOND="have_library netlibs"
 	CHOICE_netplay_OPTION_full_ACTION=netplay_full_action
 	netplay_full_action() {
-		CFLAGS="$CFLAGS -DNETPLAY=NETPLAY_FULL"
+		CCOMMONFLAGS="$CCOMMONFLAGS -DNETPLAY=NETPLAY_FULL"
 		if [ -n "$MACRO_WIN32" ]; then
 			LDFLAGS="$LDFLAGS -lws2_32"
 		fi
@@ -320,7 +324,7 @@ uqm_prepare_config()
 	CHOICE_netplay_OPTION_ipv4_PRECOND="have_library netlibs"
 	CHOICE_netplay_OPTION_ipv4_ACTION=netplay_ipv4_action
 	netplay_ipv4_action() {
-		CFLAGS="$CFLAGS -DNETPLAY=NETPLAY_IPV4"
+		CCOMMONFLAGS="$CCOMMONFLAGS -DNETPLAY=NETPLAY_IPV4"
 		NETPLAY="IPV4"
 		use_library netlibs
 	}
@@ -333,7 +337,7 @@ uqm_prepare_config()
 	CHOICE_ioformat_OPTION_stdio_zip_PRECOND="have_library zlib"
 	CHOICE_ioformat_OPTION_stdio_zip_ACTION="ioformat_stdio_zip_action"
 	ioformat_stdio_zip_action() {
-		CFLAGS="$CFLAGS -DHAVE_ZIP=1"
+		CCOMMONFLAGS="$CCOMMONFLAGS -DHAVE_ZIP=1"
 		USE_ZIP_IO=1
 		use_library zlib
 	}
@@ -344,7 +348,7 @@ uqm_prepare_config()
 	CHOICE_accel_OPTION_asm_TITLE="Platform acceleration (asm, etc.)"
 	CHOICE_accel_OPTION_asm_ACTION="accel_asm_action"
 	accel_asm_action() {
-		CFLAGS="$CFLAGS -DUSE_PLATFORM_ACCEL"
+		CCOMMONFLAGS="$CCOMMONFLAGS -DUSE_PLATFORM_ACCEL"
 		USE_PLATFORM_ACCEL=1
 	}
 	CHOICE_accel_OPTION_plainc_TITLE="Only plain C code"
@@ -359,14 +363,14 @@ uqm_prepare_config()
 	CHOICE_threadlib_OPTION_sdl_TITLE="SDL-controlled thread library"
 	CHOICE_threadlib_OPTION_sdl_ACTION="threadlib_sdl_action"
 	threadlib_sdl_action() {
-		CFLAGS="$CFLAGS -DTHREADLIB_SDL"
+		CCOMMONFLAGS="$CCOMMONFLAGS -DTHREADLIB_SDL"
 		THREADLIB="SDL"
 	}
 	CHOICE_threadlib_OPTION_pthread_TITLE="Pthread thread library"
 	CHOICE_threadlib_OPTION_pthread_PRECOND="have_library pthread"
 	CHOICE_threadlib_OPTION_pthread_ACTION="threadlib_pthread_action"
 	threadlib_pthread_action() {
-		CFLAGS="$CFLAGS -DTHREADLIB_PTHREAD"
+		CCOMMONFLAGS="$CCOMMONFLAGS -DTHREADLIB_PTHREAD"
 		THREADLIB="PTHREAD"
 		use_library pthread
 	}
@@ -419,7 +423,16 @@ uqm_process_config() {
 	# Set the content dir
 	CONTENTDIR="${INSTALL_SHAREDIR}uqm/content"
 
-	CFLAGS="$CFLAGS -I\"$BUILD_WORK\""
+	CCOMMONFLAGS="$CCOMMONFLAGS -I\"$BUILD_WORK\""
+
+	# Set C++ only flags
+	# These allow use of C++ without the standard library
+	CXXFLAGS="$CXXFLAGS -fno-rtti -fno-exceptions -nostdinc++"
+
+	# At this point, all the compiler flags must be set.
+	CFLAGS="$CFLAGS $CCOMMONFLAGS"
+	CXXFLAGS="$CXXFLAGS $CCOMMONFLAGS"
+	CCOMMONFLAGS=""
 
 	# Export the HAVE_ symbols to config_unix.h, using config_unix.h.in
 	# as template (or config_win.h/config_win.h.in).
@@ -435,8 +448,9 @@ uqm_process_config() {
 	substitute_vars SUBSTITUTE_VARS SUBSTITUTE_FILES src "$BUILD_WORK"
 
 	# Make build.vars from build.vars.in, substituting variables.
-	SUBSTITUTE_VARS="BUILD_SYSTEM HOST_SYSTEM CFLAGS LDFLAGS LINK \
+	SUBSTITUTE_VARS="BUILD_SYSTEM HOST_SYSTEM CFLAGS CXXFLAGS LDFLAGS LINK \
 			PREPROC_C MKDEP_C COMPILE_C \
+			PREPROC_CXX MKDEP_CXX COMPILE_CXX \
 			PREPROC_OBJC MKDEP_OBJC COMPILE_OBJC \
 			MAKE ECHON SED DEBUG JOYSTICK NETPLAY \
 			OGGVORBIS SOUNDMODULE USE_INTERNAL_MIKMOD \