Add mingw support to CMakeLists.txt. Add crosscompiling instructions to README.md

CMakeLists.txt

@@ -72,6 +72,11 @@ else()
 	message(STATUS "Building for 32 Bit")
 endif()
 
+if (MINGW)
+	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -static-libstdc++ -static-libgcc")
+	set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -Wl,--add-stdcall-alias")
+endif()
+
 # add_compile_options for older cmake versions
 if(${CMAKE_VERSION} VERSION_LESS "3.0.2")
 	macro(add_compile_options)

README.md

@@ -10,6 +10,12 @@ Half-Life SDK for Xash3D & GoldSource with some fixes.
     cmake ../
     make
 
+Crosscompiling using mingw:
+
+    mkdir build-mingw && cd build-mingw
+    TOOLCHAIN_PREFIX=i686-w64-mingw32 # check up the actual mingw prefix of your mingw installation
+    cmake ../ -DCMAKE_SYSTEM_NAME=Windows -DCMAKE_C_COMPILER="$TOOLCHAIN_PREFIX-gcc" -DCMAKE_CXX_COMPILER="$TOOLCHAIN_PREFIX-g++"
+
 You may enable or disable some build options by -Dkey=value. All available build options are defined in CMakeLists.txt at root directory.
 See below if you want to build the GoldSource compatible libraries.
 
@@ -68,6 +74,8 @@ or when using make without cmake:
 
 Unlike original client by Valve the resulting client library will not depend on vgui or SDL2 just like the one that's used in FWGS Xash3d.
 
+Note for **Windows**: it's not possible to create GoldSource compatible libraries using mingw, only msvc builds will work.
+
 Note for **Linux**: GoldSource requires libraries (both client and server) to be compiled with libstdc++ bundled with g++ of major version 4 (versions from 4.6 to 4.9 should work).
 If your Linux distribution does not provide compatible g++ version you have several options.
 

cl_dll/CMakeLists.txt

@@ -32,7 +32,10 @@ if(NOT MSVC)
 	add_compile_options(-fno-exceptions) # GCC/Clang flag
 	add_compile_options(-Wno-write-strings) # GCC/Clang flag
 	add_definitions(-D_LINUX -DLINUX) # It seems enough for all non-Win32 systems
-	add_definitions(-Dstricmp=strcasecmp -Dstrnicmp=strncasecmp -D_snprintf=snprintf -D_vsnprintf=vsnprintf )
+	add_definitions(-Dstricmp=strcasecmp -Dstrnicmp=strncasecmp)
+	if(NOT MINGW)
+		add_definitions(-D_snprintf=snprintf -D_vsnprintf=vsnprintf)
+	endif()
 else()
 	add_definitions(-D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_DEPRECATE)
 endif()