1# Go is an optional dependency. It's a necessary dependency if running tests or 2# the FIPS build, which will check these. 3find_program(GO_EXECUTABLE go) 4 5function(require_go) 6 if(NOT GO_EXECUTABLE) 7 message(FATAL_ERROR "Could not find Go") 8 endif() 9endfunction() 10 11function(go_executable dest package) 12 require_go() 13 set(godeps "${PROJECT_SOURCE_DIR}/util/godeps.go") 14 if(NOT CMAKE_GENERATOR STREQUAL "Ninja") 15 # The DEPFILE parameter to add_custom_command only works with Ninja. Query 16 # the sources at configure time. Additionally, everything depends on go.mod. 17 # That affects what external packages to use. 18 # 19 # TODO(davidben): Starting CMake 3.20, it also works with Make. Starting 20 # 3.21, it works with Visual Studio and Xcode too. 21 execute_process(COMMAND ${GO_EXECUTABLE} run ${godeps} -format cmake 22 -pkg ${package} 23 WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR} 24 OUTPUT_VARIABLE sources 25 RESULT_VARIABLE godeps_result) 26 add_custom_command(OUTPUT ${dest} 27 COMMAND ${GO_EXECUTABLE} build 28 -o ${CMAKE_CURRENT_BINARY_DIR}/${dest} ${package} 29 WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR} 30 DEPENDS ${sources} ${PROJECT_SOURCE_DIR}/go.mod) 31 else() 32 # Ninja expects the target in the depfile to match the output. This is a 33 # relative path from the build directory. 34 binary_dir_relative_path(${dest} target) 35 36 set(depfile "${CMAKE_CURRENT_BINARY_DIR}/${dest}.d") 37 add_custom_command(OUTPUT ${dest} 38 COMMAND ${GO_EXECUTABLE} build 39 -o ${CMAKE_CURRENT_BINARY_DIR}/${dest} ${package} 40 COMMAND ${GO_EXECUTABLE} run ${godeps} -format depfile 41 -target ${target} -pkg ${package} -out ${depfile} 42 WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR} 43 DEPENDS ${godeps} ${PROJECT_SOURCE_DIR}/go.mod 44 DEPFILE ${depfile}) 45 endif() 46endfunction() 47 48