Allow building on OpenBSD

makefile

@@ -366,6 +366,10 @@ ifeq ($(TARGETOS),netbsd)
 OSD := sdl
 endif
 
+ifeq ($(TARGETOS),openbsd)
+OSD := sdl
+endif
+
 ifeq ($(TARGETOS),solaris)
 OSD := sdl
 endif
@@ -1329,6 +1333,26 @@ netbsd_x86: generate $(PROJECTDIR)/gmake-netbsd/Makefile
 	$(SILENT) $(MAKE) -C $(PROJECTDIR)/gmake-netbsd config=$(CONFIG)32 precompile
 	$(SILENT) $(MAKE) -C $(PROJECTDIR)/gmake-netbsd config=$(CONFIG)32
 
+#-------------------------------------------------
+# gmake-openbsd
+#-------------------------------------------------
+
+$(PROJECTDIR)/gmake-openbsd/Makefile: makefile $(SCRIPTS) $(GENIE)
+	$(SILENT) $(GENIE) $(PARAMS) $(TARGET_PARAMS) --gcc=openbsd --gcc_version=$(GCC_VERSION) gmake
+
+.PHONY: openbsd_x64
+openbsd_x64: generate $(PROJECTDIR)/gmake-openbsd/Makefile
+	$(SILENT) $(MAKE) -C $(PROJECTDIR)/gmake-openbsd config=$(CONFIG)64 precompile
+	$(SILENT) $(MAKE) -C $(PROJECTDIR)/gmake-openbsd config=$(CONFIG)64
+
+.PHONY: openbsd
+openbsd: openbsd_x86
+
+.PHONY: openbsd_x86
+openbsd_x86: generate $(PROJECTDIR)/gmake-openbsd/Makefile
+	$(SILENT) $(MAKE) -C $(PROJECTDIR)/gmake-openbsd config=$(CONFIG)32 precompile
+	$(SILENT) $(MAKE) -C $(PROJECTDIR)/gmake-openbsd config=$(CONFIG)32
+
 #-------------------------------------------------
 # gmake-steamlink
 #-------------------------------------------------

scripts/toolchain.lua

@@ -31,6 +31,7 @@ newoption {
 		{ "mingw64-gcc",   "MinGW64"                },
 		{ "mingw-clang",   "MinGW (clang compiler)" },
 		{ "netbsd",        "NetBSD"                },
+		{ "openbsd",       "OpenBSD"                },
 		{ "osx",           "OSX (GCC compiler)"     },
 		{ "osx-clang",     "OSX (Clang compiler)"   },
 		{ "pnacl",         "Native Client - PNaCl"  },
@@ -211,6 +212,10 @@ function toolchain(_buildDir, _subDir)
 			location (_buildDir .. "projects/" .. _subDir .. "/".. _ACTION .. "-netbsd")
 		end
 
+		if "openbsd" == _OPTIONS["gcc"] then
+			location (_buildDir .. "projects/" .. _subDir .. "/".. _ACTION .. "-openbsd")
+		end
+
 		if "ios-arm" == _OPTIONS["gcc"] then
 			premake.gcc.cc  = "/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang"
 			premake.gcc.cxx = "/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++"
@@ -785,6 +790,28 @@ function toolchain(_buildDir, _subDir)
 	configuration { "netbsd", "x64", "Debug" }
 		targetdir (_buildDir .. "netbsd" .. "/bin/x64/Debug")
 
+	configuration { "openbsd", "x32" }
+		objdir (_buildDir .. "openbsd" .. "/obj")
+		buildoptions {
+			"-m32",
+		}
+	configuration { "openbsd", "x32", "Release" }
+		targetdir (_buildDir .. "openbsd" .. "/bin/x32/Release")
+
+	configuration { "openbsd", "x32", "Debug" }
+		targetdir (_buildDir .. "openbsd" .. "/bin/x32/Debug")
+
+	configuration { "openbsd", "x64" }
+		objdir (_buildDir .. "openbsd" .. "/obj")
+		buildoptions {
+			"-m64",
+		}
+	configuration { "openbsd", "x64", "Release" }
+		targetdir (_buildDir .. "openbsd" .. "/bin/x64/Release")
+
+	configuration { "openbsd", "x64", "Debug" }
+		targetdir (_buildDir .. "openbsd" .. "/bin/x64/Debug")
+
 	configuration { "android-*" }
 		includedirs {
 			MAME_DIR .. "3rdparty/bgfx/3rdparty/khronos",