Initial android support (#17)

* Upload Android armv7 libs

* Fix debug build

* utlvector: fix undefined behavior

* wscript: add --use-ccache option

* wscript: store ccache in a separate directory

* Propertly use gl4es

* fontconfig: fix font detection

* [android]remove fontconfig dependency

* Add build guide for other platforms

Co-authored-by: JusicP <slender87844@gmail.com>
Co-authored-by: nillerusr <nillerusr@users.noreply.github.com>

tier0/dbg.cpp

@@ -31,6 +31,10 @@
 #include "xbox/xbox_console.h"
 #endif
 
+#ifdef ANDROID
+#include <android/log.h>
+#endif
+
 #include "tier0/etwprof.h"
 
 #ifndef STEAM
@@ -309,6 +313,10 @@ static SpewRetval_t _SpewMessage( SpewType_t spewType, const char *pGroupName, i
 		nLevel
 	};
 
+#ifdef ANDROID
+    __android_log_print( ANDROID_LOG_INFO, "SRCENG", "%s", pTempBuffer );
+#endif
+
 	g_pSpewInfo = &spewInfo;
 	ret = s_SpewOutputFunc( spewType, pTempBuffer );
 	g_pSpewInfo = (int)NULL;

tier0/platform_posix.cpp

@@ -28,6 +28,9 @@
 #include <time.h>
 #include <fcntl.h>
 #endif
+#ifdef ANDROID
+#include <linux/stat.h>
+#endif
 
 #include "tier0/memdbgon.h"
 // Benchmark mode uses this heavy-handed method 

tier0/threadtools.cpp

@@ -23,8 +23,13 @@
 #elif defined(POSIX)
 
 #if !defined(OSX)
+#if defined(ANDROID)
+	#include <fcntl.h>
+	#include <unistd.h>
+#else
 	#include <sys/fcntl.h>
 	#include <sys/unistd.h>
+#endif
 	#define sem_unlink( arg )
 	#define OS_TO_PTHREAD(x) (x)
 #else

tier0/wscript

@@ -54,7 +54,7 @@ def build(bld):
 		'vcrmode_posix.cpp',	#[$POSIX]
 		'vprof.cpp',
 		# 'win32consoleio.cpp',	[$WINDOWS]
-		'../tier1/pathmatch.cpp' # [$LINUXALL]
+		#'../tier1/pathmatch.cpp' # [$LINUXALL]
 	]
 
 	includes = [
@@ -65,7 +65,7 @@ def build(bld):
 
 	defines = []
 
-	libs = ['DL']
+	libs = ['DL', 'M', 'LOG']
 
 	install_path = bld.env.LIBDIR