Merge branch 'master' into for-0.56.0/sync

.gitmodules

@@ -4,6 +4,9 @@
 [submodule "libs/crunch"]
 	path = libs/crunch
 	url = https://github.com/DaemonEngine/crunch.git
+[submodule "libs/freetype"]
+	path = libs/freetype
+	url = https://github.com/DaemonEngine/freetype.git
 [submodule "libs/googletest"]
 	path = libs/googletest
 	url = https://github.com/DaemonEngine/googletest.git

CMakeLists.txt

@@ -640,15 +640,8 @@ if ( USE_STATIC_LIBS )
 endif()
 
 # zlib
-if (BUILD_CLIENT OR BUILD_TTY_CLIENT OR BUILD_SERVER OR BUILD_DUMMY_APP OR (BUILD_CGAME AND NACL AND NOT USE_NACL_SAIGO))
-    if (NOT NACL)
-        find_package(ZLIB REQUIRED)
-    else()
-        add_library(srclibs-zlib EXCLUDE_FROM_ALL ${ZLIBLIST})
-        set_target_properties(srclibs-zlib PROPERTIES POSITION_INDEPENDENT_CODE ${GAME_PIE} FOLDER "libs")
-        set(ZLIB_INCLUDE_DIRS ${LIB_DIR}/zlib)
-        set(ZLIB_LIBRARIES srclibs-zlib)
-    endif()
+if (BUILD_CLIENT OR BUILD_TTY_CLIENT OR BUILD_SERVER OR BUILD_DUMMY_APP)
+    find_package(ZLIB REQUIRED)
     set(LIBS_BASE ${LIBS_BASE} ${ZLIB_LIBRARIES})
     include_directories(${ZLIB_INCLUDE_DIRS})
 endif()
@@ -791,6 +784,22 @@ if (USE_BREAKPAD)
     endif()
 endif()
 
+option(PREFER_EXTERNAL_LIBS "Tries to use system libs where possible." ON)
+
+macro(prefer_package LIB_NAME LIB_CMAKE)
+    if (PREFER_EXTERNAL_LIBS AND NOT NACL)
+        find_package(${LIB_NAME})
+
+        if (NOT ${LIB_NAME}_FOUND)
+            message(WARNING "PREFER_EXTERNAL_LIBS is enabled but external ${LIB_NAME} is not found, falling back to vendored ${LIB_NAME}.")
+        endif()
+    endif()
+
+    if (NOT ${LIB_NAME}_FOUND)
+        include(${LIB_CMAKE})
+    endif()
+endmacro()
+
 if (BUILD_CLIENT)
     find_package(Ogg REQUIRED)
     include_directories(${OGG_INCLUDE_DIRS})
@@ -816,7 +825,8 @@ if (BUILD_CLIENT)
     include_directories(${PNG_INCLUDE_DIRS})
     set(LIBS_CLIENT ${LIBS_CLIENT} ${PNG_LIBRARIES})
 
-    find_package(Freetype REQUIRED)
+    prefer_package(Freetype ${DAEMON_DIR}/freetype.cmake)
+
     include_directories(${FREETYPE_INCLUDE_DIRS})
     set(LIBS_CLIENT ${LIBS_CLIENT} ${FREETYPE_LIBRARIES})
 

cmake/DaemonFlags.cmake

@@ -208,9 +208,11 @@ else()
 	if (USE_RECOMMENDED_C_STANDARD)
 		# GNU89 or later standard is required when building gzip or the compiler
 		# will complain about implicitly defined lseek, read, write and close.
-		try_c_flag(GNU89 "-std=gnu89")
-		if (NOT FLAG_GNU89)
-			message(FATAL_ERROR "GNU89 or C99 not supported by compiler")
+		# GNU99 or later standard is required when building lua or lua will
+		# complain that the compiler doesn't support 'long long'.
+		try_c_flag(GNU99 "-std=gnu99")
+		if (NOT FLAG_GNU99)
+			message(FATAL_ERROR "GNU99 is not supported by the compiler")
 		endif()
 	endif()
 
@@ -224,7 +226,7 @@ else()
 		if (NOT FLAG_GNUXX14)
 			try_cxx_flag(GNUXX1Y "-std=gnu++1y")
 			if (NOT FLAG_GNUXX1Y)
-				message(FATAL_ERROR "GNU++14 or C++14 not supported by compiler")
+				message(FATAL_ERROR "GNU++14 is not supported by the compiler")
 			endif()
 		endif()
 	endif()

freetype.cmake

@@ -0,0 +1,25 @@
+set(FREETYPE_DIR ${DAEMON_DIR}/libs/freetype)
+set(FREETYPE_INCLUDE_DIRS ${FREETYPE_DIR}/include)
+set(FREETYPE_LIBRARIES freetype)
+
+option(FT_DISABLE_BROTLI "Disable Brotli" ON)
+option(FT_DISABLE_BZIP2 "Disable bzip2" ON)
+option(FT_DISABLE_HARFBUZZ "Disable HarfBuzz" ON)
+option(FT_DISABLE_PNG "Disable PNG" ON)
+
+if (PREFER_EXTERNAL_LIBS AND NOT NACL)
+	set(FREETYPE_INTERNAL_ZLIB OFF)
+else()
+	set(FREETYPE_INTERNAL_ZLIB ON)
+endif()
+
+set(FT_DISABLE_ZLIB ${FREETYPE_INTERNAL_ZLIB} CACHE BOOL "Disable external zlib" FORCE)
+
+add_subdirectory(${FREETYPE_DIR})
+
+mark_as_advanced(FT_DISABLE_BROTLI)
+mark_as_advanced(FT_DISABLE_BZIP2)
+mark_as_advanced(FT_DISABLE_HARFBUZZ)
+mark_as_advanced(FT_DISABLE_PNG)
+mark_as_advanced(FT_DISABLE_ZLIB)
+mark_as_advanced(FT_ENABLE_ERROR_STRINGS)