mgba_libretro: a port of mGBA to the libretro API (#2399)

games-emulation/mgba_libretro/additional-files/mgba_libretro.info.in

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+display_name = "Nintendo - Game Boy Advance (mGBA)"
+authors = "endrift"
+supported_extensions = "gb|gbc|gba"
+corename = "mGBA"
+manufacturer = "Nintendo"
+categories = "Emulator"
+systemname = "Game Boy/Game Boy Color/Game Boy Advance"
+database = "Nintendo - Game Boy|Nintendo - Game Boy Color|Nintendo - Game Boy Advance|Nintendo - Game Boy Advance (e-Cards)"
+license = "MPLv2.0"
+permissions = ""
+display_version = "@DISPLAY_VERSION@"
+supports_no_game = "false"
+firmware_count = 1
+firmware0_desc = "gba_bios.bin (Game Boy Advance BIOS)"
+firmware0_path = "gba_bios.bin"
+firmware0_opt = "true"
+notes = "(!) gba_bios.bin (md5): a860e8c0b6d573d191e4ec7db1b1e4f6"

games-emulation/mgba_libretro/mgba_libretro-0.6.1_20180304.recipe

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+SUMMARY="A Nintendo Game Boy Advance emulator using the libretro API"
+DESCRIPTION="mGBA is a Nintendo Game Boy Advance emulator with great accuracy. \
+It also now emulates classic Game Boy / Game Boy Color systems. This is the \
+libretro core version of mGBA, for use with RetroArch."
+HOMEPAGE="https://mgba.io/"
+COPYRIGHT="2014-2018 Endrift, the libretro team"
+LICENSE="MPL v2.0"
+REVISION="1"
+srcGitRev="b3c4ab2cf66302b0ba4e97d2c5848ad436c277ad"
+SOURCE_URI="https://github.com/libretro/mgba/archive/$srcGitRev.tar.gz"
+CHECKSUM_SHA256="7b5c62c468aef3d05c1b4608442a349b4e339b76f4d792822bcd454a25b6a82c"
+SOURCE_FILENAME="libretro-mgba-${portVersion/_/-}-$srcGitRev.tar.gz"
+SOURCE_DIR="mgba-$srcGitRev"
+ADDITIONAL_FILES="mgba_libretro.info.in"
+
+ARCHITECTURES="!x86_gcc2 ?x86 x86_64"
+SECONDARY_ARCHITECTURES="x86"
+
+PROVIDES="
+	mgba_libretro$secondaryArchSuffix = $portVersion
+	addon:mgba_libretro$secondaryArchSuffix = $portVersion
+	"
+REQUIRES="
+	haiku$secondaryArchSuffix
+	retroarch$secondaryArchSuffix
+	"
+
+BUILD_REQUIRES="
+	haiku${secondaryArchSuffix}_devel
+	"
+BUILD_PREREQUIRES="
+	cmd:gcc$secondaryArchSuffix
+	cmd:make
+	"
+
+BUILD()
+{
+	sed -e "s/@DISPLAY_VERSION@/v${portVersion/_/-}/" \
+		$portDir/additional-files/mgba_libretro.info.in \
+		> mgba_libretro.info
+	make -f Makefile.libretro $jobArgs
+}
+
+INSTALL()
+{
+	install -m 0755 -d "$docDir"
+	install -m 0644 -t "$docDir" CHANGES CONTRIBUTING.md LICENSE \
+		PORTING.md README.md
+	install -m 0755 -d "$addOnsDir"/libretro
+	install -m 0644 -t "$addOnsDir"/libretro \
+		mgba_libretro.info \
+		mgba_libretro.so
+}