libtorch-runtime/cmake-linux/gflags.cmake

set(GFLAGS_ROOT_DIR ${LIB_BASE_DIR}/gflags-src)
set(GFLAGS_BUILD_DIR ${LIB_BASE_DIR}/gflags-build)
if(NOT EXISTS ${grpc_build_dir})
    message(STATUS "${BoldGreen}Install GFLAGS to: ${GFLAGS_BUILD_DIR}${ColourReset}")
    execute_process(COMMAND  mkdir -p "${GFLAGS_BUILD_DIR}")
    execute_process(COMMAND
            cmake -DGFLAGS_NAMESPACE=google -DCMAKE_CXX_FLAGS=-fPIC -S ${GFLAGS_ROOT_DIR} -B ${GFLAGS_BUILD_DIR}
            WORKING_DIRECTORY ${LIB_BASE_DIR})
    execute_process(
            COMMAND cmake --build . -j4
            WORKING_DIRECTORY ${GFLAGS_BUILD_DIR})
endif()

set(gflags_DIR ${LIB_BASE_DIR}/gflags-build)
find_package(gflags CONFIG REQUIRED HINTS ${GFLAGS_BUILD_DIR})
find_library(GFLAGS_LIBRARY NAMES gflags PATHS ${GFLAGS_BUILD_DIR}/lib)
find_library(GFLAGS_LIBRARY_NOTHREADS NAMES gflags_nothreads PATHS ${GFLAGS_BUILD_DIR}/lib)
include_directories(${GFLAGS_BUILD_DIR}/include)


include(${CMAKE_ROOT}/Modules/FindPackageHandleStandardArgs.cmake)
FIND_PACKAGE_HANDLE_STANDARD_ARGS(gflags DEFAULT_MSG
        GFLAGS_LIBRARY GFLAGS_LIBRARY_NOTHREADS)