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# Copyright 2022-2025 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
EAPI=8
LUA_COMPAT=( lua5-{1,3,4} luajit )
inherit cmake flag-o-matic git-r3 lua-single xdg
DESCRIPTION="Sega Dreamcast, Naomi and Atomiswave emulator"
HOMEPAGE="https://github.com/flyinghead/flycast"
EGIT_REPO_URI="https://github.com/flyinghead/flycast"
EGIT_SUBMODULES=( 'core/deps/asio' 'core/deps/breakpad' 'core/deps/libjuice' 'core/deps/libusb-cmake'
'core/deps/luabridge' 'core/deps/DreamPicoPort-API' 'core/deps/rcheevos' 'core/deps/volk'
'core/deps/xbyak' 'core/deps/VulkanMemoryAllocator' 'core/deps/tinygettext'
'core/deps/DreamPicoPort-API/ext/libusb-cmake' 'core/deps/tinygettext/external/tinycmmc' )
LICENSE="GPL-2"
SLOT="0"
IUSE="alsa ao lua opengl +openmp pulseaudio vulkan"
DEPEND="
dev-cpp/asio
dev-cpp/websocketpp
dev-libs/libchdr
dev-libs/libzip
dev-libs/xxhash
media-libs/libsdl2
net-libs/miniupnpc
virtual/zlib:=
alsa? ( media-libs/alsa-lib )
ao? ( media-libs/libao )
lua? ( ${LUA_DEPS} )
opengl? ( virtual/opengl )
openmp? ( sys-devel/gcc:*[openmp] )
pulseaudio? ( media-libs/libpulse )
vulkan? (
dev-util/glslang:=
dev-util/spirv-headers
)
"
RDEPEND="${DEPEND}"
REQUIRED_USE="|| ( opengl vulkan ) || ( ao alsa pulseaudio )"
src_unpack() {
use lua && EGIT_SUBMODULES+=( 'core/deps/luabridge' )
git-r3_src_unpack
}
src_prepare() {
# Ensure unneeded deps are not bundled
for dep in chdr dirent glslang libretro-common libzip miniupnpc oboe patches SDL vixl xxHash; do
rm -rf core/deps/${dep}
done
# Skip alsa if flag not enabled
use !alsa && sed -i -e '/find_package(ALSA)/d' CMakeLists.txt
# Skip ao if flag not enabled
use !ao && sed -i -e '/pkg_check_modules(AO/d' CMakeLists.txt
if use lua; then # Lua 5.2 not available in gentoo anymore
sed -i -e '/find_package(Lua/s/5.2/5.4/' CMakeLists.txt
else # Skip lua if flag not enabled
sed -i -e '/find_package(Lua/d' CMakeLists.txt
fi
# Skip pulseaudio if flag not enabled
use !pulseaudio && sed -i -e '/pkg_check_modules(LIBPULSE/d' CMakeLists.txt
# Unbundle xxHash
sed -i -e '/XXHASH_BUILD_XXHSUM/{N;N;s/.*/target_link_libraries(${PROJECT_NAME} PRIVATE xxhash)/}' \
CMakeLists.txt || die
# Do not use ccache
sed -i -e '/find_program(CCACHE_PROGRAM/d' CMakeLists.txt
# Vulkan-header
sed -i -e '/add_subdirectory(core.*Vulkan-Headers)$/,/Vulkan::Headers/d' \
-e '/core\/deps\/Vulkan-Headers\/include)/d' CMakeLists.txt
sed -i -e '/ResourceLimits.h/a#include <glslang/Public/ShaderLang.h>' \
core/rend/vulkan/compiler.cpp
if use vulkan; then
sed -i -e '$atarget_link_libraries(${PROJECT_NAME} PRIVATE glslang glslang-default-resource-limits)' CMakeLists.txt
sed -i -e 's/throwResultException/detail::throwResultException/' core/rend/vulkan/vmallocator.{h,cpp}
grep -rl 'vk::resultCheck' | xargs sed -i -e 's/vk::resultCheck/vk::detail::resultCheck/g'
grep -rl 'vk::DynamicLoader' | xargs sed -i -e 's/vk::DynamicLoader/vk::detail::DynamicLoader/g'
sed -i -e '/end\/transform_matrix.h/a#include <set>' core/rend/vulkan/vulkan_context.cpp || die
fi
# Unbundle SDL under linux: (revert crazy commit: #4408aa7)
sed -i -e '/USE_HOST_SDL_DEFAULT/s/OFF/ON/' CMakeLists.txt
# Fix cmake version
sed -i -e '/cmake_minimum_required/s/2.6.*$/3.20)/' core/deps/xbyak/CMakeLists.txt || die
sed -i -e 's/3.2/3.20/' core/deps/glm/CMakeLists.txt || die
append-cxxflags -Wno-unused-result
cmake_src_prepare
}
src_configure() {
local mycmakeargs=(
-DBUILD_SHARED_LIBS=OFF
-DUSE_HOST_LIBCHDR=ON
-DUSE_OPENGL=$(usex opengl)
-DUSE_OPENMP=$(usex openmp)
-DUSE_VULKAN=$(usex vulkan)
-DUSE_HOST_LIBZIP=ON
-DUSE_HOST_GLSLANG=ON
-DUSE_HOST_SDL=ON
-DWITH_SYSTEM_ZLIB=ON
)
cmake_src_configure
}
src_install() {
cmake_src_install
rm -rf "${D}"/usr/$(get_libdir) "${D}"/usr/include
}
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