set(TEMPLATE_FILE "${CMAKE_CURRENT_SOURCE_DIR}/scripts/build-info.h.in") set(HEADER_FILE "${CMAKE_CURRENT_SOURCE_DIR}/build-info.h") set(BUILD_NUMBER 0) set(BUILD_COMMIT "unknown") set(BUILD_COMPILER "unknown") set(BUILD_TARGET "unknown") # Look for git find_package(Git) if(NOT Git_FOUND) find_program(GIT_EXECUTABLE NAMES git git.exe) if(GIT_EXECUTABLE) set(Git_FOUND TRUE) message(STATUS "Found Git: ${GIT_EXECUTABLE}") else() message(WARNING "Git not found. Build info will not be accurate.") endif() endif() # Get the commit count and hash if(Git_FOUND) execute_process( COMMAND ${GIT_EXECUTABLE} rev-parse --short HEAD WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR} OUTPUT_VARIABLE HEAD OUTPUT_STRIP_TRAILING_WHITESPACE ) execute_process( COMMAND ${GIT_EXECUTABLE} rev-list --count HEAD WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR} OUTPUT_VARIABLE COUNT OUTPUT_STRIP_TRAILING_WHITESPACE ) set(BUILD_COMMIT ${HEAD}) set(BUILD_NUMBER ${COUNT}) endif() if(MSVC) set(BUILD_COMPILER "${CMAKE_C_COMPILER_ID} ${CMAKE_C_COMPILER_VERSION}") set(BUILD_TARGET ${CMAKE_VS_PLATFORM_NAME}) else() execute_process( COMMAND sh -c "$@ --version | head -1" _ ${CMAKE_C_COMPILER} OUTPUT_VARIABLE OUT OUTPUT_STRIP_TRAILING_WHITESPACE ) set(BUILD_COMPILER ${OUT}) execute_process( COMMAND ${CMAKE_C_COMPILER} -dumpmachine OUTPUT_VARIABLE OUT OUTPUT_STRIP_TRAILING_WHITESPACE ) set(BUILD_TARGET ${OUT}) endif() # Only write the header if it's changed to prevent unnecessary recompilation if(EXISTS ${HEADER_FILE}) file(READ ${HEADER_FILE} CONTENTS) string(REGEX MATCH "BUILD_COMMIT \"([^\"]*)\"" _ ${CONTENTS}) set(OLD_COMMIT ${CMAKE_MATCH_1}) string(REGEX MATCH "BUILD_COMPILER \"([^\"]*)\"" _ ${CONTENTS}) set(OLD_COMPILER ${CMAKE_MATCH_1}) string(REGEX MATCH "BUILD_TARGET \"([^\"]*)\"" _ ${CONTENTS}) set(OLD_TARGET ${CMAKE_MATCH_1}) if ( NOT OLD_COMMIT STREQUAL BUILD_COMMIT OR NOT OLD_COMPILER STREQUAL BUILD_COMPILER OR NOT OLD_TARGET STREQUAL BUILD_TARGET ) configure_file(${TEMPLATE_FILE} ${HEADER_FILE}) endif() else() configure_file(${TEMPLATE_FILE} ${HEADER_FILE}) endif()