Merge post-0.7.0 commits through 'c8250d8b8' into v0.7.2.

sdl_common.c has lost some commits in the restructuring and those
will need to be replayed over the restructured files for SDL1 and 2.

sc2/build/unix/config_proginfo_build

@@ -26,6 +26,9 @@
 # CFLAGS
 SYSTEM_BUILD_CFLAGS=""
 
+# CXXFLAGS
+SYSTEM_BUILD_CXXFLAGS=""
+
 # LDFLAGS
 SYSTEM_BUILD_LDFLAGS=""
 
@@ -33,6 +36,9 @@ SYSTEM_BUILD_LDFLAGS=""
 BUILDTOOL_PREPROC_C_NAME="C preprocessor"
 BUILDTOOL_MKDEP_C_NAME="C dependency generator"
 BUILDTOOL_COMPILE_C_NAME="C compiler"
+BUILDTOOL_PREPROC_CXX_NAME="C++ preprocessor"
+BUILDTOOL_MKDEP_CXX_NAME="C++ dependency generator"
+BUILDTOOL_COMPILE_CXX_NAME="C++ compiler"
 BUILDTOOL_PREPROC_OBJC_NAME="Objective-C preprocessor"
 BUILDTOOL_MKDEP_OBJC_NAME="Objective-C dependency generator"
 BUILDTOOL_COMPILE_OBJC_NAME="Objective-C compiler"
@@ -48,6 +54,15 @@ useGccBuildTools() {
 	BUILDTOOL_COMPILE_C_COMMAND="\$PROG_gcc_FILE -c $EXTRA_PLATFORM_GCC_FLAGS_COMPILE_C"
 	BUILDTOOL_COMPILE_C_DEPEND='gcc'
 
+	BUILDTOOL_PREPROC_CXX_COMMAND="\$PROG_gcc_FILE -E $EXTRA_PLATFORM_GCC_FLAGS_PREPROC_CXX"
+	BUILDTOOL_PREPROC_CXX_DEPEND='gcc'
+
+	BUILDTOOL_MKDEP_CXX_COMMAND="\$PROG_gcc_FILE -MM $EXTRA_PLATFORM_GCC_FLAGS_MKDEP_CXX"
+	BUILDTOOL_MKDEP_CXX_DEPEND='gcc'
+
+	BUILDTOOL_COMPILE_CXX_COMMAND="\$PROG_gcc_FILE -c $EXTRA_PLATFORM_GCC_FLAGS_COMPILE_CXX"
+	BUILDTOOL_COMPILE_CXX_DEPEND='gcc'
+
 	BUILDTOOL_PREPROC_OBJC_COMMAND="\$PROG_gcc_FILE -E $EXTRA_PLATFORM_GCC_FLAGS_PREPROC_OBJC"
 	BUILDTOOL_PREPROC_OBJC_DEPEND='gcc'
 
@@ -303,6 +318,12 @@ PROG_gcce_ACTION=""
 PROG_gcce_VERSION='$(arm-none-symbianelf-gcc --version)'
 
 
+### mingw-gcc ###
+PROG_mingw_gcc_NAME="GNU C MinGW Cross-compiler"
+PROG_mingw_gcc_FILE="i686-pc-mingw32-gcc"
+PROG_mingw_gcc_ACTION=""
+PROG_mingw_gcc_VERSION='$(i686-pc-mingw32-gcc --version)'
+
 
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 # Describe the libaries (possibly) used:                                     #