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cmake: add optional system wlroots support (default unchanged) #114

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124 changes: 101 additions & 23 deletions CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -11,22 +11,33 @@ set(CMAKE_C_STANDARD_REQUIRED ON)
set(CMAKE_CXX_STANDARD 20)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

option(USE_BUNDLED_WLROOTS "Build bundled wlroots" ON)

find_package(PkgConfig REQUIRED)
find_package(Git QUIET)
find_program(PROTOC_EXECUTABLE protoc REQUIRED)
find_program(WAYLAND_SCANNER_EXECUTABLE wayland-scanner REQUIRED)

# Prefer the locally built wlroots tree.
set(WLROOTS_DIR "${CMAKE_SOURCE_DIR}/wlroots")
set(WLROOTS_BUILD_DIR "${WLROOTS_DIR}/build")
set(WLROOTS_PC_DIR "${WLROOTS_BUILD_DIR}/meson-uninstalled")
set(WLROOTS_PROTOCOL_DIR "${WLROOTS_BUILD_DIR}/protocol")

set(WLROOTS_PC_NAME "wlroots-0.19")
find_program(MESON_EXECUTABLE meson)
find_program(NINJA_EXECUTABLE ninja)

if(USE_BUNDLED_WLROOTS)
# Prefer the locally built wlroots tree.
set(WLROOTS_DIR "${CMAKE_SOURCE_DIR}/wlroots")
set(WLROOTS_BUILD_DIR "${WLROOTS_DIR}/build")
set(WLROOTS_PC_DIR "${WLROOTS_BUILD_DIR}/meson-uninstalled")
set(WLROOTS_PROTOCOL_DIR "${WLROOTS_BUILD_DIR}/protocol")

find_program(MESON_EXECUTABLE meson)
find_program(NINJA_EXECUTABLE ninja)
endif()


# Build wlroots locally via meson/ninja, matching the makefile flow, and bootstrap the submodule if missing.
function(build_wlroots_if_needed)
if(NOT USE_BUNDLED_WLROOTS)
return()
endif()

if(EXISTS "${WLROOTS_PC_DIR}/wlroots-0.19-uninstalled.pc" OR EXISTS "${WLROOTS_PC_DIR}/wlroots-0.19.pc")
return()
endif()
Expand Down Expand Up @@ -69,21 +80,76 @@ function(build_wlroots_if_needed)
endif()
endfunction()

build_wlroots_if_needed()
build_wlroots_if_needed()

if(EXISTS "${WLROOTS_PC_DIR}/wlroots-0.19-uninstalled.pc")
set(WLROOTS_PC_NAME "wlroots-0.19-uninstalled")
elseif(EXISTS "${WLROOTS_PC_DIR}/wlroots-0.19.pc")
set(WLROOTS_PC_NAME "wlroots-0.19")
endif()
if(EXISTS "${WLROOTS_PC_DIR}")
set(ENV{PKG_CONFIG_PATH} "${WLROOTS_PC_DIR}:$ENV{PKG_CONFIG_PATH}")
if(USE_BUNDLED_WLROOTS)
if(EXISTS "${WLROOTS_PC_DIR}/wlroots-0.19-uninstalled.pc")
set(WLROOTS_PC_NAME "wlroots-0.19-uninstalled")
elseif(EXISTS "${WLROOTS_PC_DIR}/wlroots-0.19.pc")
set(WLROOTS_PC_NAME "wlroots-0.19")
endif()

if(EXISTS "${WLROOTS_PC_DIR}")
set(ENV{PKG_CONFIG_PATH} "${WLROOTS_PC_DIR}:$ENV{PKG_CONFIG_PATH}")
endif()
endif()

pkg_check_modules(WLROOTS REQUIRED ${WLROOTS_PC_NAME} wayland-server xkbcommon)
pkg_check_modules(GLFW REQUIRED glfw3)
pkg_check_modules(PROTOBUF REQUIRED protobuf)

pkg_get_variable(WAYLAND_PROTOCOLS_DIR wayland-protocols pkgdatadir)

if(NOT USE_BUNDLED_WLROOTS)
set(GENERATED_PROTOCOL_DIR "${CMAKE_BINARY_DIR}/generated-protocols")
file(MAKE_DIRECTORY "${GENERATED_PROTOCOL_DIR}")

set(LAYER_SHELL_XML "${CMAKE_SOURCE_DIR}/wlroots/protocol/wlr-layer-shell-unstable-v1.xml")
set(LAYER_SHELL_HEADER "${GENERATED_PROTOCOL_DIR}/wlr-layer-shell-unstable-v1-protocol.h")

set(POINTER_CONSTRAINTS_XML "${WAYLAND_PROTOCOLS_DIR}/unstable/pointer-constraints/pointer-constraints-unstable-v1.xml")
set(POINTER_CONSTRAINTS_HEADER "${GENERATED_PROTOCOL_DIR}/pointer-constraints-unstable-v1-protocol.h")

set(XDG_SHELL_XML "${WAYLAND_PROTOCOLS_DIR}/stable/xdg-shell/xdg-shell.xml")
set(XDG_SHELL_HEADER "${GENERATED_PROTOCOL_DIR}/xdg-shell-protocol.h")

add_custom_command(
OUTPUT "${LAYER_SHELL_HEADER}"
COMMAND "${WAYLAND_SCANNER_EXECUTABLE}" server-header
"${LAYER_SHELL_XML}"
"${LAYER_SHELL_HEADER}"
DEPENDS "${LAYER_SHELL_XML}"
COMMENT "Generating wlr-layer-shell-unstable-v1-protocol.h"
VERBATIM
)

add_custom_command(
OUTPUT "${POINTER_CONSTRAINTS_HEADER}"
COMMAND "${WAYLAND_SCANNER_EXECUTABLE}" server-header
"${POINTER_CONSTRAINTS_XML}"
"${POINTER_CONSTRAINTS_HEADER}"
DEPENDS "${POINTER_CONSTRAINTS_XML}"
COMMENT "Generating pointer-constraints-unstable-v1-protocol.h"
VERBATIM
)

add_custom_command(
OUTPUT "${XDG_SHELL_HEADER}"
COMMAND "${WAYLAND_SCANNER_EXECUTABLE}" server-header
"${XDG_SHELL_XML}"
"${XDG_SHELL_HEADER}"
DEPENDS "${XDG_SHELL_XML}"
COMMENT "Generating xdg-shell-protocol.h"
VERBATIM
)

add_custom_target(system_wlr_protocols DEPENDS
"${LAYER_SHELL_HEADER}"
"${POINTER_CONSTRAINTS_HEADER}"
"${XDG_SHELL_HEADER}"
)
endif()

set(PROTO_FILES
"protos/api.proto"
)
Expand Down Expand Up @@ -235,7 +301,7 @@ add_custom_target(generate_protos DEPENDS
)

# Build wlroots locally via meson/ninja, matching the makefile flow.
if(MESON_EXECUTABLE AND NINJA_EXECUTABLE)
if(USE_BUNDLED_WLROOTS AND MESON_EXECUTABLE AND NINJA_EXECUTABLE)
add_custom_command(
OUTPUT "${WLROOTS_BUILD_DIR}/build.ninja"
WORKING_DIRECTORY "${CMAKE_SOURCE_DIR}/wlroots"
Expand Down Expand Up @@ -282,7 +348,11 @@ list(REMOVE_DUPLICATES MATRIX_SOURCES)

add_executable(matrix ${MATRIX_SOURCES})

if(TARGET wlroots_build)
if(NOT USE_BUNDLED_WLROOTS)
add_dependencies(matrix system_wlr_protocols)
endif()

if(USE_BUNDLED_WLROOTS AND TARGET wlroots_build)
add_dependencies(matrix wlroots_build)
endif()
add_dependencies(matrix generate_protos)
Expand All @@ -291,6 +361,7 @@ set_target_properties(matrix PROPERTIES
POSITION_INDEPENDENT_CODE ON
)


target_include_directories(matrix PRIVATE
include
"${PROTO_CPP_OUTPUT_DIR}"
Expand All @@ -300,9 +371,20 @@ target_include_directories(matrix PRIVATE
${WLROOTS_INCLUDE_DIRS}
${GLFW_INCLUDE_DIRS}
${PROTOBUF_INCLUDE_DIRS}
${WLROOTS_PROTOCOL_DIR}
)

if(USE_BUNDLED_WLROOTS)
target_include_directories(matrix PRIVATE
${WLROOTS_PROTOCOL_DIR}
)
else()
target_include_directories(matrix PRIVATE
"${GENERATED_PROTOCOL_DIR}"
)
endif()



target_compile_definitions(matrix PRIVATE
WLR_USE_UNSTABLE
)
Expand Down Expand Up @@ -330,11 +412,7 @@ target_link_directories(matrix PRIVATE
${CMAKE_SOURCE_DIR}/lib
)

set(WLROOTS_RPATH_1 "${WLROOTS_BUILD_DIR}")
set(WLROOTS_RPATH_2 "${WLROOTS_BUILD_DIR}/subprojects/wayland/src")
target_link_options(matrix PRIVATE
"-Wl,-rpath,${WLROOTS_RPATH_1}"
"-Wl,-rpath,${WLROOTS_RPATH_2}"
"-Wl,--as-needed"
)

Expand Down