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CMake: Simplify overriding of options / settings 

Outer projects can just set() the option / setting before calling add_subdirectory() on Dawn.

Also provide a build directory for Dawn's third_party dependencies. Allows the outer project to specify a third_party directory that's out of the dawn tree.

Change-Id: I04c5f12b362ee9c9488b7b78a6aa5fa6f55dec98
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/64743
Commit-Queue: Ben Clayton <bclayton@google.com>
Reviewed-by: Austin Eng <enga@chromium.org>
This commit is contained in:
Ben Clayton 2021-09-24 10:38:18 +00:00 committed by Dawn LUCI CQ
parent 0e3aa3c8d0
commit 30eeac7578
2 changed files with 49 additions and 25 deletions
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60
CMakeLists.txt
View File

@ -47,6 +47,30 @@ set(DAWN_DUMMY_FILE "${DAWN_SRC_DIR}/Dummy.cpp")
# Configuration options
################################################################################
# option_if_not_defined(name description default)
# Behaves like:
# option(name description default)
# If a variable is not already defined with the given name, otherwise the
# function does nothing.
# Simplifies customization by projects that use Dawn as a dependency.
function (option_if_not_defined name description default)
if(NOT DEFINED ${name})
option(${name} ${description} ${default})
endif()
endfunction()
# set_if_not_defined(name value description)
# Behaves like:
# set(${name} ${value} CACHE STRING ${description})
# If a variable is not already defined with the given name, otherwise the
# function does nothing.
# Simplifies customization by projects that use Dawn as a dependency.
function (set_if_not_defined name value description)
if(NOT DEFINED ${name})
set(${name} ${value} CACHE STRING ${description})
endif()
endfunction()
# Default values for the backend-enabling options
set(ENABLE_D3D12 OFF)
set(ENABLE_METAL OFF)
@ -81,30 +105,30 @@ if (DAWN_SUPPORTS_GLFW_FOR_WINDOWING)
set(BUILD_EXAMPLE ON)
endif()
option(DAWN_ENABLE_D3D12 "Enable compilation of the D3D12 backend" ${ENABLE_D3D12})
option(DAWN_ENABLE_METAL "Enable compilation of the Metal backend" ${ENABLE_METAL})
option(DAWN_ENABLE_NULL "Enable compilation of the Null backend" ON)
option(DAWN_ENABLE_DESKTOP_GL "Enable compilation of the OpenGL backend" ${ENABLE_DESKTOP_GL})
option(DAWN_ENABLE_OPENGLES "Enable compilation of the OpenGL ES backend" ${ENABLE_OPENGLES})
option(DAWN_ENABLE_VULKAN "Enable compilation of the Vulkan backend" ${ENABLE_VULKAN})
option(DAWN_ALWAYS_ASSERT "Enable assertions on all build types" OFF)
option(DAWN_USE_X11 "Enable support for X11 surface" ${USE_X11})
option_if_not_defined(DAWN_ENABLE_D3D12 "Enable compilation of the D3D12 backend" ${ENABLE_D3D12})
option_if_not_defined(DAWN_ENABLE_METAL "Enable compilation of the Metal backend" ${ENABLE_METAL})
option_if_not_defined(DAWN_ENABLE_NULL "Enable compilation of the Null backend" ON)
option_if_not_defined(DAWN_ENABLE_DESKTOP_GL "Enable compilation of the OpenGL backend" ${ENABLE_DESKTOP_GL})
option_if_not_defined(DAWN_ENABLE_OPENGLES "Enable compilation of the OpenGL ES backend" ${ENABLE_OPENGLES})
option_if_not_defined(DAWN_ENABLE_VULKAN "Enable compilation of the Vulkan backend" ${ENABLE_VULKAN})
option_if_not_defined(DAWN_ALWAYS_ASSERT "Enable assertions on all build types" OFF)
option_if_not_defined(DAWN_USE_X11 "Enable support for X11 surface" ${USE_X11})
option(DAWN_BUILD_EXAMPLES "Enables building Dawn's exmaples" ${BUILD_EXAMPLE})
option_if_not_defined(DAWN_BUILD_EXAMPLES "Enables building Dawn's exmaples" ${BUILD_EXAMPLE})
set(DAWN_THIRD_PARTY_DIR "${Dawn_SOURCE_DIR}/third_party" CACHE STRING "Directory in which to find third-party dependencies.")
set_if_not_defined(DAWN_THIRD_PARTY_DIR "${Dawn_SOURCE_DIR}/third_party" "Directory in which to find third-party dependencies.")
# Recommended setting for compability with future abseil releases.
set(ABSL_PROPAGATE_CXX_STD ON)
set(DAWN_ABSEIL_DIR "${DAWN_THIRD_PARTY_DIR}/abseil-cpp" CACHE STRING "Directory in which to find Abseil")
set(DAWN_GLFW_DIR "${DAWN_THIRD_PARTY_DIR}/glfw" CACHE STRING "Directory in which to find GLFW")
set(DAWN_GLM_DIR "${DAWN_THIRD_PARTY_DIR}/glm" CACHE STRING "Directory in which to find GLM")
set(DAWN_JINJA2_DIR "${DAWN_THIRD_PARTY_DIR}/jinja2" CACHE STRING "Directory in which to find Jinja2")
set(DAWN_SPIRV_CROSS_DIR "${DAWN_THIRD_PARTY_DIR}/vulkan-deps/spirv-cross/src" CACHE STRING "Directory in which to find SPIRV-Cross")
set(DAWN_SPIRV_HEADERS_DIR "${DAWN_THIRD_PARTY_DIR}/vulkan-deps/spirv-headers/src" CACHE STRING "Directory in which to find SPIRV-Headers")
set(DAWN_SPIRV_TOOLS_DIR "${DAWN_THIRD_PARTY_DIR}/vulkan-deps/spirv-tools/src" CACHE STRING "Directory in which to find SPIRV-Tools")
set(DAWN_TINT_DIR "${DAWN_THIRD_PARTY_DIR}/tint" CACHE STRING "Directory in which to find Tint")
set_if_not_defined(DAWN_ABSEIL_DIR "${DAWN_THIRD_PARTY_DIR}/abseil-cpp" "Directory in which to find Abseil")
set_if_not_defined(DAWN_GLFW_DIR "${DAWN_THIRD_PARTY_DIR}/glfw" "Directory in which to find GLFW")
set_if_not_defined(DAWN_GLM_DIR "${DAWN_THIRD_PARTY_DIR}/glm" "Directory in which to find GLM")
set_if_not_defined(DAWN_JINJA2_DIR "${DAWN_THIRD_PARTY_DIR}/jinja2" "Directory in which to find Jinja2")
set_if_not_defined(DAWN_SPIRV_CROSS_DIR "${DAWN_THIRD_PARTY_DIR}/vulkan-deps/spirv-cross/src" "Directory in which to find SPIRV-Cross")
set_if_not_defined(DAWN_SPIRV_HEADERS_DIR "${DAWN_THIRD_PARTY_DIR}/vulkan-deps/spirv-headers/src" "Directory in which to find SPIRV-Headers")
set_if_not_defined(DAWN_SPIRV_TOOLS_DIR "${DAWN_THIRD_PARTY_DIR}/vulkan-deps/spirv-tools/src" "Directory in which to find SPIRV-Tools")
set_if_not_defined(DAWN_TINT_DIR "${DAWN_THIRD_PARTY_DIR}/tint" "Directory in which to find Tint")
# Much of the backend code is shared among desktop OpenGL and OpenGL ES
if (${DAWN_ENABLE_DESKTOP_GL} OR ${DAWN_ENABLE_OPENGLES})

14
third_party/CMakeLists.txt vendored
View File

@ -18,7 +18,7 @@ if (DAWN_REQUIRES_SPIRV_CROSS AND NOT TARGET spirv-cross)
set(SPIRV_CROSS_SKIP_INSTALL ON CACHE BOOL "" FORCE)
message(STATUS "Dawn: using spirv-cross at ${DAWN_SPIRV_CROSS_DIR}")
add_subdirectory(${DAWN_SPIRV_CROSS_DIR})
add_subdirectory(${DAWN_SPIRV_CROSS_DIR} "${CMAKE_BINARY_DIR}/third_party/spirv-cross")
endif()
if (NOT TARGET SPIRV-Headers)
@ -26,7 +26,7 @@ if (NOT TARGET SPIRV-Headers)
set(SPIRV_HEADERS_SKIP_INSTALL ON CACHE BOOL "" FORCE)
message(STATUS "Dawn: using SPIRV-Headers at ${DAWN_SPIRV_HEADERS_DIR}")
add_subdirectory(${DAWN_SPIRV_HEADERS_DIR})
add_subdirectory(${DAWN_SPIRV_HEADERS_DIR} "${CMAKE_BINARY_DIR}/third_party/spirv-headers")
endif()
if (NOT TARGET SPIRV-Tools)
@ -35,7 +35,7 @@ if (NOT TARGET SPIRV-Tools)
set(SKIP_SPIRV_TOOLS_INSTALL ON CACHE BOOL "" FORCE)
message(STATUS "Dawn: using SPIRV-Tools at ${DAWN_SPIRV_TOOLS_DIR}")
add_subdirectory(${DAWN_SPIRV_TOOLS_DIR})
add_subdirectory(${DAWN_SPIRV_TOOLS_DIR} "${CMAKE_BINARY_DIR}/third_party/spirv-tools")
endif()
if (NOT TARGET glfw)
@ -44,24 +44,24 @@ if (NOT TARGET glfw)
set(GLFW_BUILD_EXAMPLES OFF CACHE BOOL "" FORCE)
message(STATUS "Dawn: using GLFW at ${DAWN_GLFW_DIR}")
add_subdirectory(${DAWN_GLFW_DIR})
add_subdirectory(${DAWN_GLFW_DIR} "${CMAKE_BINARY_DIR}/third_party/glfw")
endif()
if (DAWN_BUILD_EXAMPLES)
if (NOT TARGET glm)
message(STATUS "Dawn: using GLM at ${DAWN_GLM_DIR}")
add_subdirectory(${DAWN_GLM_DIR})
add_subdirectory(${DAWN_GLM_DIR} "${CMAKE_BINARY_DIR}/third_party/glm")
endif()
endif()
if (NOT TARGET libtint)
message(STATUS "Dawn: using Tint at ${DAWN_TINT_DIR}")
add_subdirectory(${DAWN_TINT_DIR})
add_subdirectory(${DAWN_TINT_DIR} "${CMAKE_BINARY_DIR}/third_party/tint")
endif()
if (NOT TARGET libabsl)
message(STATUS "Dawn: using Abseil at ${DAWN_ABSEIL_DIR}")
add_subdirectory(${DAWN_ABSEIL_DIR})
add_subdirectory(${DAWN_ABSEIL_DIR} "${CMAKE_BINARY_DIR}/third_party/abseil")
endif()
# Header-only library for khrplatform.h