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cmake_minimum_required(VERSION 3.13.4)
if(NOT DEFINED BASE_LLVM_VERSION)
set (BASE_LLVM_VERSION 20.1.0)
endif(NOT DEFINED BASE_LLVM_VERSION)
set(LLVM_SPIRV_VERSION ${BASE_LLVM_VERSION}.0)
include(FetchContent)
include(FindPkgConfig)
option(LLVM_SPIRV_INCLUDE_TESTS
"Generate build targets for the llvm-spirv lit tests."
${LLVM_INCLUDE_TESTS})
if (NOT DEFINED LLVM_SPIRV_BUILD_EXTERNAL)
# check if we build inside llvm or not
if(CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
set(LLVM_SPIRV_BUILD_EXTERNAL YES)
endif(CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
endif (NOT DEFINED LLVM_SPIRV_BUILD_EXTERNAL)
if(LLVM_SPIRV_BUILD_EXTERNAL)
# Make sure llvm-spirv gets built when building outside the llvm tree.
set(LLVM_BUILD_TOOLS ON)
endif(LLVM_SPIRV_BUILD_EXTERNAL)
# Download spirv.hpp from the official SPIRV-Headers repository.
# One can skip this step by manually setting
# LLVM_EXTERNAL_SPIRV_HEADERS_SOURCE_DIR path.
if(NOT DEFINED LLVM_TOOL_SPIRV_HEADERS_BUILD AND
NOT DEFINED LLVM_EXTERNAL_SPIRV_HEADERS_SOURCE_DIR)
set(LLVM_EXTERNAL_SPIRV_HEADERS_SOURCE_DIR
"${CMAKE_CURRENT_BINARY_DIR}/SPIRV-Headers")
message(STATUS "SPIR-V Headers location is not specified. Will try to download
spirv.hpp from https://github.com/KhronosGroup/SPIRV-Headers into
${LLVM_EXTERNAL_SPIRV_HEADERS_SOURCE_DIR}")
file(READ spirv-headers-tag.conf SPIRV_HEADERS_TAG)
# Strip the potential trailing newline from tag
string(STRIP "${SPIRV_HEADERS_TAG}" SPIRV_HEADERS_TAG)
FetchContent_Declare(spirv-headers
GIT_REPOSITORY https://github.com/KhronosGroup/SPIRV-Headers.git
GIT_TAG ${SPIRV_HEADERS_TAG}
SOURCE_DIR ${LLVM_EXTERNAL_SPIRV_HEADERS_SOURCE_DIR}
)
FetchContent_MakeAvailable(spirv-headers)
else()
if(NOT DEFINED LLVM_EXTERNAL_SPIRV_HEADERS_SOURCE_DIR)
# This means LLVM_TOOL_SPIRV_HEADERS_BUILD is defined, therefore
# SPIRV-Headers exist as a subproject.
set(LLVM_EXTERNAL_SPIRV_HEADERS_SOURCE_DIR
"${CMAKE_SOURCE_DIR}/projects/SPIRV-Headers")
if(NOT EXISTS ${LLVM_EXTERNAL_SPIRV_HEADERS_SOURCE_DIR})
message(FATAL_ERROR "No location specified for SPIRV-Headers.
Try setting the LLVM_EXTERNAL_SPIRV_HEADERS_SOURCE_DIR
path or put the project into the llvm/projects folder
under the name 'SPIRV-Headers'")
endif()
endif()
message(STATUS "Using SPIR-V Headers from
${LLVM_EXTERNAL_SPIRV_HEADERS_SOURCE_DIR}")
endif()
if(LLVM_SPIRV_BUILD_EXTERNAL)
project(LLVM_SPIRV
VERSION
${LLVM_SPIRV_VERSION}
LANGUAGES
CXX
C
)
set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
if(LLVM_SPIRV_INCLUDE_TESTS)
set(LLVM_TEST_COMPONENTS
llvm-as
llvm-dis
)
endif(LLVM_SPIRV_INCLUDE_TESTS)
find_package(LLVM ${BASE_LLVM_VERSION} REQUIRED
COMPONENTS
Analysis
BitReader
BitWriter
CodeGen
Core
Passes
Support
TargetParser
TransformUtils
${LLVM_TEST_COMPONENTS}
)
set(CMAKE_MODULE_PATH
${CMAKE_MODULE_PATH}
${LLVM_CMAKE_DIR}
)
include(AddLLVM)
include(HandleLLVMOptions)
include(LLVM-Config)
message(STATUS "Found LLVM: ${LLVM_VERSION}")
is_llvm_target_library("SPIRV" spirv_present_result INCLUDED_TARGETS)
if(spirv_present_result)
message(STATUS "Found SPIR-V Backend")
set(SPIRV_BACKEND_FOUND TRUE)
add_compile_definitions(LLVM_SPIRV_BACKEND_TARGET_PRESENT)
endif()
option(CCACHE_ALLOWED "allow use of ccache" TRUE)
find_program(CCACHE_EXE_FOUND ccache)
if(CCACHE_EXE_FOUND AND CCACHE_ALLOWED)
message(STATUS "Found ccache: ${CCACHE_EXE_FOUND}")
set_property(GLOBAL PROPERTY RULE_LAUNCH_COMPILE ccache)
set_property(GLOBAL PROPERTY RULE_LAUNCH_LINK ccache)
endif()
endif()
set(LLVM_SPIRV_INCLUDE_DIRS ${CMAKE_CURRENT_SOURCE_DIR}/include)
# first try locating SPIRV-Tools via pkgconfig (the old way)
pkg_search_module(SPIRV_TOOLS SPIRV-Tools)
if (NOT SPIRV_TOOLS_FOUND)
# then try locating SPIRV-Tools via cmake (the new way)
find_package(SPIRV-Tools)
find_package(SPIRV-Tools-tools)
if (SPIRV-Tools_FOUND AND SPIRV-Tools-tools_FOUND)
set(SPIRV_TOOLS_FOUND TRUE)
# check for the existance of library targets in the found packages
if(TARGET SPIRV-Tools-shared)
# use the shared libary target if present
set(SPIRV-Tools-library SPIRV-Tools-shared)
elseif(TARGET SPIRV-Tools-static)
# otherwise fallback to the static library target
set(SPIRV-Tools-library SPIRV-Tools-static)
else()
message(FATAL_ERROR "Found SPIRV-Tools package but neither "
"SPIRV-Tools-shared or SPIRV-Tools-static targets exist.")
endif()
set(SPIRV_TOOLS_LDFLAGS ${SPIRV-Tools-library})
get_target_property(SPIRV_TOOLS_INCLUDE_DIRS ${SPIRV-Tools-library} INTERFACE_INCLUDE_DIRECTORIES)
endif()
endif()
option(LLVM_SPIRV_ENABLE_LIBSPIRV_DIS "Enable --spirv-tools-dis support.")
if (NOT SPIRV_TOOLS_FOUND AND LLVM_SPIRV_ENABLE_LIBSPIRV_DIS)
message(STATUS "SPIRV-Tools not found; project will be built without "
"--spirv-tools-dis support.")
endif()
add_compile_options(-fvisibility=hidden)
add_compile_options($<$<COMPILE_LANGUAGE:CXX>:-fvisibility-inlines-hidden>)
add_subdirectory(lib/SPIRV)
add_subdirectory(tools/llvm-spirv)
if(LLVM_SPIRV_INCLUDE_TESTS)
add_subdirectory(test)
endif(LLVM_SPIRV_INCLUDE_TESTS)
install(
FILES
${LLVM_SPIRV_INCLUDE_DIRS}/LLVMSPIRVLib.h
${LLVM_SPIRV_INCLUDE_DIRS}/LLVMSPIRVOpts.h
${LLVM_SPIRV_INCLUDE_DIRS}/LLVMSPIRVExtensions.inc
DESTINATION
${CMAKE_INSTALL_PREFIX}/include/LLVMSPIRVLib
)
configure_file(LLVMSPIRVLib.pc.in ${CMAKE_BINARY_DIR}/LLVMSPIRVLib.pc @ONLY)
install(
FILES
${CMAKE_BINARY_DIR}/LLVMSPIRVLib.pc
DESTINATION
${CMAKE_INSTALL_PREFIX}/lib${LLVM_LIBDIR_SUFFIX}/pkgconfig
)
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