BSD: Add support (#140)

* BSD: Add support

* BSD: other fixes

There is still a bug when vgui haven't got text, maybe because of resources.

Also there is bug where when trying to start new game caption names shows wrong.

* BSD: Debugging

* BSD: modify preprocessor and fix windows

* BSD: Remove debugging and fix labels in gameui

* BSD: Remove disabling some DX9 commands

* BSD: Remove -g flag

vgui2/src/system_posix.cpp

@@ -28,13 +28,15 @@
 #include "vgui_key_translation.h"
 #include "filesystem.h"
 
-#ifdef OSX
-#include <Carbon/Carbon.h>
+#if defined(OSX) || defined(BSD)
 #include <sys/param.h>
 #include <sys/mount.h>
 #elif defined(LINUX)
 #include <sys/vfs.h>
 #endif
+#ifdef OSX
+#include <Carbon/Carbon.h>
+#endif
 
 #ifdef USE_SDL
 #include "SDL_clipboard.h"
@@ -290,7 +292,7 @@ void CSystem::ShellExecute(const char *command, const char *file)
 	if ( pid == 0 )
 	{
 		// Child
-#ifdef LINUX
+#if defined(LINUX) || defined(BSD)
 		// Escape steam runtime if necessary
 		const char *szSteamRuntime = getenv( "STEAM_RUNTIME" );
 		if ( szSteamRuntime )
@@ -585,7 +587,7 @@ int CSystem::GetAvailableDrives(char *buf, int bufLen)
 //-----------------------------------------------------------------------------
 double CSystem::GetFreeDiskSpace(const char *path)
 {
-#if __DARWIN_ONLY_64_BIT_INO_T
+#if __DARWIN_ONLY_64_BIT_INO_T || BSD
     // MoeMod: newer macOS only support 64bit, so no statfs64 is provided
     struct statfs buf;
     int ret = statfs( path, &buf );