# Copyright 2020 The Shaderc Authors. All rights reserved.

#

# Licensed under the Apache License, Version 2.0 (the "License");

# you may not use this file except in compliance with the License.

# You may obtain a copy of the License at

#

# http://www.apache.org/licenses/LICENSE-2.0

#

# Unless required by applicable law or agreed to in writing, software

# distributed under the License is distributed on an "AS IS" BASIS,

# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

# See the License for the specific language governing permissions and

# limitations under the License.

cmake_minimum_required(VERSION 3.17.2)

project(shaderc)

enable_testing()

if ("${CMAKE_BUILD_TYPE}" STREQUAL "")

message(STATUS "No build type selected, default to Debug")

set(CMAKE_BUILD_TYPE "Debug")

endif()

message(STATUS "Shaderc: build type is \"${CMAKE_BUILD_TYPE}\".")

option(SHADERC_ENABLE_WGSL_OUTPUT "Enable WGSL output" OFF)

option(SHADERC_SKIP_INSTALL "Skip installation" ${SHADERC_SKIP_INSTALL})

if(NOT ${SHADERC_SKIP_INSTALL})

set(SHADERC_ENABLE_INSTALL ON)

endif()

option(SHADERC_SKIP_TESTS "Skip building tests" ${SHADERC_SKIP_TESTS})

if(NOT ${SHADERC_SKIP_TESTS})

set(SHADERC_ENABLE_TESTS ON)

endif()

if(${SHADERC_ENABLE_TESTS})

message(STATUS "Configuring Shaderc to build tests.")

else()

message(STATUS "Configuring Shaderc to avoid building tests.")

endif()

option(SHADERC_SKIP_EXAMPLES "Skip building examples" ${SHADERC_SKIP_EXAMPLES})

if(NOT ${SHADERC_SKIP_EXAMPLES})

set(SHADERC_ENABLE_EXAMPLES ON)

endif()

if(${SHADERC_ENABLE_EXAMPLES})

message(STATUS "Configuring Shaderc to build examples.")

else()

message(STATUS "Configuring Shaderc to avoid building examples.")

endif()

option(SHADERC_SKIP_COPYRIGHT_CHECK "Skip copyright check" ${SHADERC_SKIP_COPYRIGHT_CHECK})

if(NOT ${SHADERC_SKIP_COPYRIGHT_CHECK})

set(SHADERC_ENABLE_COPYRIGHT_CHECK ON)

endif()

if(${SHADERC_ENABLE_COPYRIGHT_CHECK})

message(STATUS "Configuring Shaderc to check copyrights.")

else()

message(STATUS "Configuring Shaderc to avoid checking copyrights.")

endif()

option(SHADERC_ENABLE_WERROR_COMPILE "Enable passing -Werror to compiler, if available" ON)

set (CMAKE_CXX_STANDARD 17)

include(GNUInstallDirs)

include(cmake/setup_build.cmake)

include(cmake/utils.cmake)

include(CheckCXXCompilerFlag)

set(SPIRV_CROSS_EXCEPTIONS_TO_ASSERTIONS ${DISABLE_EXCEPTIONS} CACHE BOOL "Coupling SPIRV-Cross exception conversion to DISABLE_EXCEPTIONS" FORCE)

if(DISABLE_EXCEPTIONS)

# Need to set additional values here, since some of the wrapped code occurs in

# .h/.hpp files, so maybe included outside of the library.

add_definitions(-DSPIRV_CROSS_EXCEPTIONS_TO_ASSERTIONS)

endif()

# These flags are not supported on Windows and some older version of GCC

# that our bots use.

# Warning about implicit fallthrough in switch blocks

check_cxx_compiler_flag(-Wimplicit-fallthrough COMPILER_SUPPORTS_FALLTHROUGH_WARNING)

if (COMPILER_SUPPORTS_FALLTHROUGH_WARNING)

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wimplicit-fallthrough")

endif()

# Warning about extra semi-colons

check_cxx_compiler_flag(-Wextra-semi COMPILER_SUPPORTS_EXTRA_SEMI_WARNING)

if (COMPILER_SUPPORTS_EXTRA_SEMI_WARNING)

add_compile_options("-Wextra-semi")

endif()

find_package(Python COMPONENTS Interpreter REQUIRED)

if (SHADERC_ENABLE_COPYRIGHT_CHECK)

add_custom_target(check-copyright ALL

${Python_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/utils/add_copyright.py

--check

WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}

COMMENT "Check copyright")

endif()

add_custom_target(add-copyright

${Python_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/utils/add_copyright.py

WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}

COMMENT "Add copyright")

if(MSVC)

option(SHADERC_ENABLE_SHARED_CRT

"Use the shared CRT instead of the static CRT"

OFF)

if (SHADERC_ENABLE_SHARED_CRT)

set(CMAKE_MSVC_RUNTIME_LIBRARY "MultiThreaded$<$<CONFIG:Debug>:Debug>DLL")

else()

set(CMAKE_MSVC_RUNTIME_LIBRARY "MultiThreaded$<$<CONFIG:Debug>:Debug>")

endif()

endif(MSVC)

# Configure subdirectories.

# We depend on these for later projects, so they should come first.

add_subdirectory(third_party)

add_subdirectory(libshaderc_util)

add_subdirectory(libshaderc)

add_subdirectory(glslc)

if(${SHADERC_ENABLE_EXAMPLES})

add_subdirectory(examples)

endif()

add_custom_target(build-version

${Python_EXECUTABLE}

${CMAKE_CURRENT_SOURCE_DIR}/utils/update_build_version.py

${shaderc_SOURCE_DIR} ${spirv-tools_SOURCE_DIR} ${glslang_SOURCE_DIR} ${CMAKE_CURRENT_BINARY_DIR}/build-version.inc

COMMENT "Update build-version.inc in the Shaderc build directory (if necessary).")

function(define_pkg_config_file NAME LIBS)

add_custom_target(${NAME}-pkg-config ALL

COMMAND ${CMAKE_COMMAND}

-DCHANGES_FILE=${CMAKE_CURRENT_SOURCE_DIR}/CHANGES

-DTEMPLATE_FILE=${CMAKE_CURRENT_SOURCE_DIR}/cmake/${NAME}.pc.in

-DOUT_FILE=${CMAKE_CURRENT_BINARY_DIR}/${NAME}.pc

-DCMAKE_INSTALL_PREFIX=${CMAKE_INSTALL_PREFIX}

-DCMAKE_INSTALL_LIBDIR=${CMAKE_INSTALL_LIBDIR}

-DCMAKE_INSTALL_INCLUDEDIR=${CMAKE_INSTALL_INCLUDEDIR}

-DLIBS=${LIBS}

-P ${CMAKE_CURRENT_SOURCE_DIR}/cmake/write_pkg_config.cmake

DEPENDS "CHANGES" "cmake/${NAME}.pc.in" "cmake/write_pkg_config.cmake")

if (SHADERC_ENABLE_INSTALL)

install(

FILES

${CMAKE_CURRENT_BINARY_DIR}/${NAME}.pc

DESTINATION

${CMAKE_INSTALL_LIBDIR}/pkgconfig)

endif()

endfunction()

define_pkg_config_file(shaderc -lshaderc_shared)

define_pkg_config_file(shaderc_static "-lshaderc ${EXTRA_STATIC_PKGCONFIG_LIBS} -lshaderc_util")

define_pkg_config_file(shaderc_combined -lshaderc_combined)