Add recipe for DGen.

games-emulation/dgen/dgen-1.33.recipe

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+SUMMARY="SEGA Genesis/Mega Drive emulator"
+DESCRIPTION="DGen is a free, open source and portable emulator for the Sega \
+Genesis and Mega Drive systems. Features:
+ * Game Genie/Hex codes support
+ * PAL/NTSC, fullscreen modes
+ * Joypad/joystick support
+ * Mouse support
+ * Highly configurable controls
+ * Screenshots, demos recording and playback"
+HOMEPAGE="http://dgen.sourceforge.net/"
+COPYRIGHT="1998-2014 tamentis & zamaz"
+SRC_URI="http://sourceforge.net/projects/dgen/files/dgen/$portVersion/dgen-sdl-$portVersion.tar.gz"
+CHECKSUM_SHA256="99e2c06017c22873c77f88186ebcc09867244eb6e042c763bb094b02b8def61e"
+SOURCE_DIR="dgen-sdl-$portVersion"
+REVISION="1"
+LICENSE="BSD (2-clause)"
+
+ARCHITECTURES="x86 ?x86_64"
+if [ $effectiveTargetArchitecture != x86_gcc2 ]; then
+    # x86_gcc2 is fine as primary target architecture as long as we're building
+    # for a different secondary architecture.
+    ARCHITECTURES="$ARCHITECTURES x86_gcc2"
+else
+    ARCHITECTURES="$ARCHITECTURES !x86_gcc2"
+fi
+SECONDARY_ARCHITECTURES="x86"
+
+PROVIDES="
+	dgen$secondaryArchSuffix = $portVersion
+	cmd:dgen = $portVersion
+	cmd:dgen_tobin = $portVersion
+	"
+REQUIRES="
+	haiku$secondaryArchSuffix
+	lib:libsdl_1.2$secondaryArchSuffix
+	"
+BUILD_REQUIRES="
+	haiku${secondaryArchSuffix}_devel
+	devel:libsdl_1.2$secondaryArchSuffix
+	"
+BUILD_PREREQUIRES="
+	cmd:awk
+	cmd:nasm
+	cmd:make
+	cmd:gcc$secondaryArchSuffix
+	cmd:ld$secondaryArchSuffix
+	"
+
+BUILD()
+{
+	runConfigure --omit-dirs binDir ./configure --bindir=$prefix/bin
+	make $jobArgs
+}
+
+INSTALL()
+{
+	make install
+	addAppDeskbarSymlink $prefix/bin/dgen "DGen"
+}