cmake_minimum_required(VERSION 3.16)
project(
  glog
  VERSION 0.6.0
  DESCRIPTION "C++ implementation of the Google logging module"
  HOMEPAGE_URL https://github.com/google/glog
  LANGUAGES CXX)

set(CPACK_PACKAGE_NAME glog)
set(CPACK_PACKAGE_DESCRIPTION_SUMMARY "Google logging library")
set(CPACK_PACKAGE_VERSION_MAJOR ${PROJECT_VERSION_MAJOR})
set(CPACK_PACKAGE_VERSION_MINOR ${PROJECT_VERSION_MINOR})
set(CPACK_PACKAGE_VERSION_PATCH ${PROJECT_VERSION_PATCH})
set(CPACK_PACKAGE_VERSION ${PROJECT_VERSION})

list(APPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake)

include(CheckCXXCompilerFlag)
include(CheckCXXSourceCompiles)
include(CheckCXXSourceRuns)
include(CheckCXXSymbolExists)
include(CheckFunctionExists)
include(CheckIncludeFileCXX)
include(CheckLibraryExists)
include(CheckStructHasMember)
include(CheckTypeSize)
include(CMakeDependentOption)
include(CMakePackageConfigHelpers)
include(CMakePushCheckState)
include(CPack)
include(CTest)
# include (DetermineGflagsNamespace)
include(GenerateExportHeader)
include(GetCacheVariables)
include(GNUInstallDirs)

option(BUILD_SHARED_LIBS "Build shared libraries" OFF)
option(PRINT_UNSYMBOLIZED_STACK_TRACES
       "Print file offsets in traces instead of symbolizing" OFF)
option(WITH_CUSTOM_PREFIX "Enable support for user-generated message prefixes"
       ON)
option(WITH_GFLAGS "Use gflags" ON)
option(WITH_GTEST "Use Google Test" OFF)
option(WITH_PKGCONFIG "Enable pkg-config support" OFF)
option(WITH_SYMBOLIZE "Enable symbolize module" ON)
option(WITH_THREADS "Enable multithreading support" ON)
option(WITH_TLS "Enable Thread Local Storage (TLS) support" ON)
option(WITH_UNWIND "Enable libunwind support" ON)

cmake_dependent_option(WITH_GMOCK "Use Google Mock" ON WITH_GTEST OFF)

if(NOT WITH_UNWIND)
  set(CMAKE_DISABLE_FIND_PACKAGE_Unwind ON)
endif(NOT WITH_UNWIND)

if(NOT WITH_GTEST)
  set(CMAKE_DISABLE_FIND_PACKAGE_GTest ON)
endif(NOT WITH_GTEST)

if(NOT WITH_THREADS)
  set(CMAKE_DISABLE_FIND_PACKAGE_Threads ON)
endif(NOT WITH_THREADS)

set(CMAKE_C_VISIBILITY_PRESET hidden)
set(CMAKE_CXX_VISIBILITY_PRESET hidden)
set(CMAKE_POSITION_INDEPENDENT_CODE ON)
set(CMAKE_VISIBILITY_INLINES_HIDDEN ON)

set(CMAKE_DEBUG_POSTFIX d)
set(CMAKE_THREAD_PREFER_PTHREAD 1)

find_package(GTest NO_MODULE)

if(GTest_FOUND)
  set(HAVE_LIB_GTEST 1)
endif(GTest_FOUND)

if(WITH_GMOCK AND TARGET GTest::gmock)
  set(HAVE_LIB_GMOCK 1)
endif(WITH_GMOCK AND TARGET GTest::gmock)

if(WITH_GFLAGS)
  # find_package (gflags 2.2.2)

  # if (gflags_FOUND)
  set(HAVE_LIB_GFLAGS 1)
  set(gflags_FOUND 1)
  set(gflags_NAMESPACE
      gflags
      CACHE INTERNAL "gflags namespace")
  # determine_gflags_namespace (gflags_NAMESPACE) endif (gflags_FOUND)
endif(WITH_GFLAGS)

find_package(Threads)
find_package(Unwind)

if(Unwind_FOUND)
  set(HAVE_LIB_UNWIND 1)
else(Unwind_FOUND)
  check_include_file_cxx(unwind.h HAVE_UNWIND_H)
  # Check whether linking actually succeeds. ARM toolchains of LLVM unwind
  # implementation do not necessarily provide the _Unwind_Backtrace function
  # which causes the previous check to succeed but the linking to fail.
  check_cxx_symbol_exists(_Unwind_Backtrace unwind.h HAVE__UNWIND_BACKTRACE)
endif(Unwind_FOUND)

check_include_file_cxx(dlfcn.h HAVE_DLFCN_H)
check_include_file_cxx(execinfo.h HAVE_EXECINFO_H)
check_include_file_cxx(glob.h HAVE_GLOB_H)
check_include_file_cxx(inttypes.h HAVE_INTTYPES_H)
check_include_file_cxx(memory.h HAVE_MEMORY_H)
check_include_file_cxx(pwd.h HAVE_PWD_H)
check_include_file_cxx(stdint.h HAVE_STDINT_H)
check_include_file_cxx(strings.h HAVE_STRINGS_H)
check_include_file_cxx(sys/stat.h HAVE_SYS_STAT_H)
check_include_file_cxx(sys/syscall.h HAVE_SYS_SYSCALL_H)
check_include_file_cxx(sys/time.h HAVE_SYS_TIME_H)
check_include_file_cxx(sys/types.h HAVE_SYS_TYPES_H)
check_include_file_cxx(sys/utsname.h HAVE_SYS_UTSNAME_H)
check_include_file_cxx(sys/wait.h HAVE_SYS_WAIT_H)
check_include_file_cxx(syscall.h HAVE_SYSCALL_H)
check_include_file_cxx(syslog.h HAVE_SYSLOG_H)
check_include_file_cxx(ucontext.h HAVE_UCONTEXT_H)
check_include_file_cxx(unistd.h HAVE_UNISTD_H)

check_include_file_cxx("ext/hash_map" HAVE_EXT_HASH_MAP)
check_include_file_cxx("ext/hash_set" HAVE_EXT_HASH_SET)
check_include_file_cxx("ext/slist" HAVE_EXT_SLIST)
check_include_file_cxx("tr1/unordered_map" HAVE_TR1_UNORDERED_MAP)
check_include_file_cxx("tr1/unordered_set" HAVE_TR1_UNORDERED_SET)
check_include_file_cxx("unordered_map" HAVE_UNORDERED_MAP)
check_include_file_cxx("unordered_set" HAVE_UNORDERED_SET)

check_type_size("unsigned __int16" HAVE___UINT16 LANGUAGE CXX)
check_type_size(u_int16_t HAVE_U_INT16_T LANGUAGE CXX)
check_type_size(uint16_t HAVE_UINT16_T LANGUAGE CXX)

check_function_exists(dladdr HAVE_DLADDR)
check_function_exists(fcntl HAVE_FCNTL)
check_function_exists(pread HAVE_PREAD)
check_function_exists(pwrite HAVE_PWRITE)
check_function_exists(sigaction HAVE_SIGACTION)
check_function_exists(sigaltstack HAVE_SIGALTSTACK)

# NOTE gcc does not fail if you pass a non-existent -Wno-* option as an
# argument. However, it will happily fail if you pass the corresponding -W*
# option. So, we check whether options that disable warnings exist by testing
# the availability of the corresponding option that enables the warning. This
# eliminates the need to check for compiler for several (mainly Clang) options.

check_cxx_compiler_flag(-Wdeprecated HAVE_NO_DEPRECATED)
check_cxx_compiler_flag(-Wunnamed-type-template-args
                        HAVE_NO_UNNAMED_TYPE_TEMPLATE_ARGS)

cmake_push_check_state(RESET)

if(Threads_FOUND)
  set(CMAKE_REQUIRED_LIBRARIES Threads::Threads)
endif(Threads_FOUND)

check_cxx_symbol_exists(pthread_threadid_np "pthread.h"
                        HAVE_PTHREAD_THREADID_NP)
cmake_pop_check_state()

# NOTE: Cannot use check_function_exists here since >=vc-14.0 can define
# snprintf as an inline function
check_cxx_symbol_exists(snprintf cstdio HAVE_SNPRINTF)

check_library_exists(dbghelp UnDecorateSymbolName "" HAVE_DBGHELP)

check_cxx_source_compiles(
  "
#include <cstdlib>
static void foo(void) __attribute__ ((unused));
int main(void) { return 0; }
"
  HAVE___ATTRIBUTE__)

check_cxx_source_compiles(
  "
#include <cstdlib>
static void foo(void) __attribute__ ((visibility(\"default\")));
int main(void) { return 0; }
"
  HAVE___ATTRIBUTE__VISIBILITY_DEFAULT)

check_cxx_source_compiles(
  "
#include <cstdlib>
static void foo(void) __attribute__ ((visibility(\"hidden\")));
int main(void) { return 0; }
"
  HAVE___ATTRIBUTE__VISIBILITY_HIDDEN)

check_cxx_source_compiles(
  "
int main(void) { if (__builtin_expect(0, 0)) return 1; return 0; }
" HAVE___BUILTIN_EXPECT)

check_cxx_source_compiles(
  "
int main(void)
{
  int a; if (__sync_val_compare_and_swap(&a, 0, 1)) return 1; return 0;
}
"
  HAVE___SYNC_VAL_COMPARE_AND_SWAP)

cmake_push_check_state(RESET)
set(CMAKE_REQUIRED_LIBRARIES Threads::Threads)
check_cxx_source_compiles(
  "
#define _XOPEN_SOURCE 500
#include <pthread.h>
int main(void)
{
  pthread_rwlock_t l;
  pthread_rwlock_init(&l, NULL);
  pthread_rwlock_rdlock(&l);
  return 0;
}
"
  HAVE_RWLOCK)
cmake_pop_check_state()

check_cxx_source_compiles(
  "
__declspec(selectany) int a;
int main(void) { return 0; }
"
  HAVE___DECLSPEC)

check_cxx_source_compiles(
  "
#include <vector>
vector<int> t; int main() { }
"
  STL_NO_NAMESPACE)

check_cxx_source_compiles(
  "
#include <vector>
std::vector<int> t; int main() { }
"
  STL_STD_NAMESPACE)

check_cxx_source_compiles(
  "
#include <iostream>
std::ostream& operator<<(std::ostream&, struct s);
using ::operator<<;
int main() { }
"
  HAVE_USING_OPERATOR)

check_cxx_source_compiles(
  "
namespace Outer { namespace Inner { int i = 0; }}
using namespace Outer::Inner;;
int main() { return i; }
"
  HAVE_NAMESPACES)

check_cxx_source_compiles(
  "
__thread int tls;
int main() { }
"
  HAVE_GCC_TLS)

check_cxx_source_compiles(
  "
__declspec(thread) int tls;
int main() { }
"
  HAVE_MSVC_TLS)

check_cxx_source_compiles(
  "
thread_local int tls;
int main() { }
"
  HAVE_CXX11_TLS)

check_cxx_source_compiles(
  "
#include <type_traits>
std::aligned_storage<sizeof(char), alignof(char)>::type data;
int main() { }
"
  HAVE_ALIGNED_STORAGE)

check_cxx_source_compiles(
  "
#include <atomic>
std::atomic<int> i;
int main() { }
"
  HAVE_CXX11_ATOMIC)

check_cxx_source_compiles(
  "
constexpr int x = 0;
int main() { }
"
  HAVE_CXX11_CONSTEXPR)

check_cxx_source_compiles(
  "
#include <chrono>
std::chrono::seconds s;
int main() { }
"
  HAVE_CXX11_CHRONO)

check_cxx_source_compiles(
  "
#include <cstddef>
void foo(std::nullptr_t) {}
int main(void) { foo(nullptr); }
"
  HAVE_CXX11_NULLPTR_T)

if(WITH_TLS)
  # Cygwin does not support the thread attribute. Don't bother.
  if(HAVE_GCC_TLS)
    set(GLOG_THREAD_LOCAL_STORAGE "__thread")
  elseif(HAVE_MSVC_TLS)
    set(GLOG_THREAD_LOCAL_STORAGE "__declspec(thread)")
  elseif(HAVE_CXX11_TLS)
    set(GLOG_THREAD_LOCAL_STORAGE thread_local)
  endif(HAVE_GCC_TLS)
endif(WITH_TLS)

set(_PC_FIELDS
    "gregs[REG_PC]"
    "gregs[REG_EIP]"
    "gregs[REG_RIP]"
    "sc_ip"
    "uc_regs->gregs[PT_NIP]"
    "gregs[R15]"
    "arm_pc"
    "mc_eip"
    "mc_rip"
    "__gregs[REG_EIP]"
    "__gregs[REG_RIP]"
    "ss.eip"
    "__ss.__eip"
    "ss.rip"
    "__ss.__rip"
    "ss.srr0"
    "__ss.__srr0")

set(_PC_HEADERS ucontext.h signal.h)

if(HAVE_UCONTEXT_H AND NOT PC_FROM_UCONTEXT)
  foreach(_PC_FIELD ${_PC_FIELDS})
    foreach(_PC_HEADER ${_PC_HEADERS})
      set(_TMP
          ${CMAKE_CURRENT_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/uctfield.cpp
      )
      file(
        WRITE ${_TMP}
        "
#define _GNU_SOURCE 1
#include <${_PC_HEADER}>
int main(void)
{
  ucontext_t u;
  return u.${_PC_FIELD} == 0;
}
")
      try_compile(
        HAVE_PC_FROM_UCONTEXT ${CMAKE_CURRENT_BINARY_DIR}
        ${_TMP}
        COMPILE_DEFINITIONS _GNU_SOURCE=1)

      if(HAVE_PC_FROM_UCONTEXT)
        set(PC_FROM_UCONTEXT
            ${_PC_FIELD}
            CACHE)
      endif(HAVE_PC_FROM_UCONTEXT)
    endforeach(_PC_HEADER)
  endforeach(_PC_FIELD)
endif(HAVE_UCONTEXT_H AND NOT PC_FROM_UCONTEXT)

if(STL_STD_NAMESPACE)
  set(STL_NAMESPACE std)
else(STL_STD_NAMESPACE)
  set(STL_NAMESPACE "")
endif(STL_STD_NAMESPACE)

set(GOOGLE_NAMESPACE google)
set(_START_GOOGLE_NAMESPACE_ "namespace ${GOOGLE_NAMESPACE} {")
set(_END_GOOGLE_NAMESPACE_ "}")
set(ac_cv_have_glog_export 1)

if(HAVE___UINT16)
  set(ac_cv_have___uint16 1)
else(HAVE___UINT16)
  set(ac_cv_have___uint16 0)
endif(HAVE___UINT16)

if(HAVE_INTTYPES_H)
  set(ac_cv_have_inttypes_h 1)
else(HAVE_INTTYPES_H)
  set(ac_cv_have_inttypes_h 0)
endif(HAVE_INTTYPES_H)

if(HAVE_LIB_GFLAGS)
  set(ac_cv_have_libgflags 1)
else(HAVE_LIB_GFLAGS)
  set(ac_cv_have_libgflags 0)
endif(HAVE_LIB_GFLAGS)

if(HAVE_STDINT_H)
  set(ac_cv_have_stdint_h 1)
else(HAVE_STDINT_H)
  set(ac_cv_have_stdint_h 0)
endif(HAVE_STDINT_H)

if(HAVE_SYS_TYPES_H)
  set(ac_cv_have_systypes_h 1)
else(HAVE_SYS_TYPES_H)
  set(ac_cv_have_systypes_h 0)
endif(HAVE_SYS_TYPES_H)

if(HAVE_U_INT16_T)
  set(ac_cv_have_u_int16_t 1)
else(HAVE_U_INT16_T)
  set(ac_cv_have_u_int16_t 0)
endif(HAVE_U_INT16_T)

if(HAVE_UINT16_T)
  set(ac_cv_have_uint16_t 1)
else(HAVE_UINT16_T)
  set(ac_cv_have_uint16_t 0)
endif(HAVE_UINT16_T)

if(HAVE_UNISTD_H)
  set(ac_cv_have_unistd_h 1)
else(HAVE_UNISTD_H)
  set(ac_cv_have_unistd_h 0)
endif(HAVE_UNISTD_H)

set(ac_google_namespace ${GOOGLE_NAMESPACE})
set(ac_google_end_namespace ${_END_GOOGLE_NAMESPACE_})
set(ac_google_start_namespace ${_START_GOOGLE_NAMESPACE_})

if(HAVE___ATTRIBUTE__)
  set(ac_cv___attribute___noreturn "__attribute__((noreturn))")
  set(ac_cv___attribute___noinline "__attribute__((noinline))")
  set(ac_cv___attribute___printf_4_5
      "__attribute__((__format__(__printf__, 4, 5)))")
elseif(HAVE___DECLSPEC)
  set(ac_cv___attribute___noreturn "__declspec(noreturn)")
  # set (ac_cv___attribute___noinline "__declspec(noinline)")
endif(HAVE___ATTRIBUTE__)

if(HAVE___BUILTIN_EXPECT)
  set(ac_cv_have___builtin_expect 1)
else(HAVE___BUILTIN_EXPECT)
  set(ac_cv_have___builtin_expect 0)
endif(HAVE___BUILTIN_EXPECT)

if(HAVE_USING_OPERATOR)
  set(ac_cv_cxx_using_operator 1)
else(HAVE_USING_OPERATOR)
  set(ac_cv_cxx_using_operator 0)
endif(HAVE_USING_OPERATOR)

if(HAVE_CXX11_CONSTEXPR)
  set(ac_cv_cxx11_constexpr 1)
else(HAVE_CXX11_CONSTEXPR)
  set(ac_cv_cxx11_constexpr 0)
endif(HAVE_CXX11_CONSTEXPR)

if(HAVE_CXX11_CHRONO)
  set(ac_cv_cxx11_chrono 1)
else(HAVE_CXX11_CHRONO)
  set(ac_cv_cxx11_chrono 0)
endif(HAVE_CXX11_CHRONO)

if(HAVE_CXX11_NULLPTR_T)
  set(ac_cv_cxx11_nullptr_t 1)
else(HAVE_CXX11_NULLPTR_T)
  set(ac_cv_cxx11_nullptr_t 0)
endif(HAVE_CXX11_NULLPTR_T)

if(HAVE_EXECINFO_H)
  set(HAVE_STACKTRACE 1)
endif(HAVE_EXECINFO_H)

if(HAVE_CXX11_ATOMIC)
  set(ac_cv_cxx11_atomic 1)
else(HAVE_CXX11_ATOMIC)
  set(ac_cv_cxx11_atomic 0)
endif(HAVE_CXX11_ATOMIC)

if(WITH_SYMBOLIZE)
  if(WIN32 OR CYGWIN)
    cmake_push_check_state(RESET)
    set(CMAKE_REQUIRED_LIBRARIES DbgHelp)

    check_cxx_source_runs(
      [=[
    #include <windows.h>
    #include <dbghelp.h>
    #include <cstdlib>

    void foobar() { }

    int main()
    {
        HANDLE process = GetCurrentProcess();

        if (!SymInitialize(process, NULL, TRUE))
            return EXIT_FAILURE;

        char buf[sizeof(SYMBOL_INFO) + MAX_SYM_NAME];
        SYMBOL_INFO *symbol = reinterpret_cast<SYMBOL_INFO *>(buf);
        symbol->SizeOfStruct = sizeof(SYMBOL_INFO);
        symbol->MaxNameLen = MAX_SYM_NAME;

        void* const pc = reinterpret_cast<void*>(&foobar);
        BOOL ret = SymFromAddr(process, reinterpret_cast<DWORD64>(pc), 0, symbol);

        return ret ? EXIT_SUCCESS : EXIT_FAILURE;
    }
    ]=]
      HAVE_SYMBOLIZE)

    cmake_pop_check_state()

    if(HAVE_SYMBOLIZE)
      set(HAVE_STACKTRACE 1)
    endif(HAVE_SYMBOLIZE)
  elseif(UNIX OR (APPLE AND HAVE_DLADDR))
    set(HAVE_SYMBOLIZE 1)
  endif(WIN32 OR CYGWIN)
endif(WITH_SYMBOLIZE)

# CMake manages symbolize availability. The definition is necessary only when
# building the library. Switch to add_compile_definitions once we drop support
# for CMake below version 3.12.
add_definitions(-DGLOG_NO_SYMBOLIZE_DETECTION)

check_cxx_source_compiles(
  "
#include <cstdlib>
#include <ctime>
int main()
{
    time_t timep;
    struct tm result;
    localtime_r(&timep, &result);
    return EXIT_SUCCESS;
}
"
  HAVE_LOCALTIME_R)

set(SIZEOF_VOID_P ${CMAKE_SIZEOF_VOID_P})

if(WITH_THREADS AND Threads_FOUND)
  if(CMAKE_USE_PTHREADS_INIT)
    set(HAVE_PTHREAD 1)
  endif(CMAKE_USE_PTHREADS_INIT)
else(WITH_THREADS AND Threads_FOUND)
  set(NO_THREADS 1)
endif(WITH_THREADS AND Threads_FOUND)

# fopen/open on Cygwin can not handle unix-type paths like /home/.... therefore
# we translate TEST_SRC_DIR to windows-path.
if(CYGWIN)
  execute_process(
    COMMAND cygpath.exe -m ${CMAKE_CURRENT_SOURCE_DIR}
    OUTPUT_STRIP_TRAILING_WHITESPACE
    OUTPUT_VARIABLE TEST_SRC_DIR)
  set(TEST_SRC_DIR \"${TEST_SRC_DIR}\")
else(CYGWIN)
  set(TEST_SRC_DIR \"${CMAKE_CURRENT_SOURCE_DIR}\")
endif(CYGWIN)

configure_file(src/config.h.cmake.in config.h)
configure_file(src/glog/logging.h.in glog/logging.h @ONLY)
configure_file(src/glog/raw_logging.h.in glog/raw_logging.h @ONLY)
configure_file(src/glog/stl_logging.h.in glog/stl_logging.h @ONLY)
configure_file(src/glog/vlog_is_on.h.in glog/vlog_is_on.h @ONLY)

add_compile_options(
  $<$<AND:$<BOOL:${HAVE_NO_UNNAMED_TYPE_TEMPLATE_ARGS}>,$<NOT:$<CXX_COMPILER_ID:GNU>>>:-Wno-unnamed-type-template-args>
)

set(_glog_CMake_BINDIR ${CMAKE_INSTALL_BINDIR})
set(_glog_CMake_INCLUDE_DIR ${CMAKE_INSTALL_INCLUDEDIR})
set(_glog_CMake_LIBDIR ${CMAKE_INSTALL_LIBDIR})
set(_glog_CMake_INSTALLDIR ${_glog_CMake_LIBDIR}/cmake/glog)

set(_glog_CMake_DIR glog/cmake)
set(_glog_CMake_DATADIR ${CMAKE_INSTALL_DATAROOTDIR}/${_glog_CMake_DIR})
set(_glog_BINARY_CMake_DATADIR
    ${CMAKE_CURRENT_BINARY_DIR}/${_glog_CMake_DATADIR})

# Add additional CMake find modules here.
set(_glog_CMake_MODULES)

if(Unwind_FOUND)
  # Copy the module only if libunwind is actually used.
  list(APPEND _glog_CMake_MODULES
       ${CMAKE_CURRENT_SOURCE_DIR}/cmake/FindUnwind.cmake)
endif(Unwind_FOUND)

# Generate file name for each module in the binary directory
foreach(_file ${_glog_CMake_MODULES})
  get_filename_component(_module "${_file}" NAME)

  list(APPEND _glog_BINARY_CMake_MODULES
       ${_glog_BINARY_CMake_DATADIR}/${_module})
endforeach(_file)

if(_glog_CMake_MODULES)
  # Copy modules to binary directory during the build
  add_custom_command(
    OUTPUT ${_glog_BINARY_CMake_MODULES}
    COMMAND ${CMAKE_COMMAND} -E make_directory ${_glog_BINARY_CMake_DATADIR}
    COMMAND ${CMAKE_COMMAND} -E copy ${_glog_CMake_MODULES}
            ${_glog_BINARY_CMake_DATADIR}
    DEPENDS ${_glog_CMake_MODULES}
    COMMENT "Copying find modules...")
endif(_glog_CMake_MODULES)

set(GLOG_PUBLIC_H
    ${CMAKE_CURRENT_BINARY_DIR}/glog/export.h
    ${CMAKE_CURRENT_BINARY_DIR}/glog/logging.h
    ${CMAKE_CURRENT_BINARY_DIR}/glog/raw_logging.h
    ${CMAKE_CURRENT_BINARY_DIR}/glog/stl_logging.h
    ${CMAKE_CURRENT_BINARY_DIR}/glog/vlog_is_on.h
    src/glog/log_severity.h
    src/glog/platform.h)

set(GLOG_SRCS
    ${GLOG_PUBLIC_H}
    src/base/commandlineflags.h
    src/base/googleinit.h
    src/base/mutex.h
    src/demangle.cc
    src/demangle.h
    src/logging.cc
    src/raw_logging.cc
    src/symbolize.cc
    src/symbolize.h
    src/utilities.cc
    src/utilities.h
    src/vlog_is_on.cc)

if(HAVE_PTHREAD
   OR WIN32
   OR CYGWIN)
  list(APPEND GLOG_SRCS src/signalhandler.cc)
endif(
  HAVE_PTHREAD
  OR WIN32
  OR CYGWIN)

if(CYGWIN OR WIN32)
  list(APPEND GLOG_SRCS src/windows/port.cc src/windows/port.h)
endif(CYGWIN OR WIN32)

add_library(glogbase OBJECT ${_glog_BINARY_CMake_MODULES} ${GLOG_SRCS})

add_library(glog $<TARGET_OBJECTS:glogbase>)

add_library(glog::glog ALIAS glog)

set(glog_libraries_options_for_static_linking)

if(Unwind_FOUND)
  target_link_libraries(glog PRIVATE unwind::unwind)
  set(glog_libraries_options_for_static_linking
      "${glog_libraries_options_for_static_linking} -lunwind")
  set(Unwind_DEPENDENCY "find_dependency (Unwind ${Unwind_VERSION})")
endif(Unwind_FOUND)

if(HAVE_DBGHELP)
  target_link_libraries(glog PRIVATE dbghelp)
  set(glog_libraries_options_for_static_linking
      "${glog_libraries_options_for_static_linking} -ldbghelp")
endif(HAVE_DBGHELP)

if(HAVE_PTHREAD)
  target_link_libraries(glog PRIVATE ${CMAKE_THREAD_LIBS_INIT})

  if(CMAKE_THREAD_LIBS_INIT)
    set(glog_libraries_options_for_static_linking
        "${glog_libraries_options_for_static_linking} ${CMAKE_THREAD_LIBS_INIT}"
    )
  endif(CMAKE_THREAD_LIBS_INIT)
endif(HAVE_PTHREAD)

if(gflags_FOUND)
  # Prefer the gflags target that uses double colon convention
  # target_link_libraries(glog PRIVATE gflags::gflags) 
    # if (TARGET
  # gflags::gflags) target_link_libraries (glog PUBLIC gflags::gflags) else
  # (TARGET gflags::gflags) target_link_libraries (glog PUBLIC gflags) endif
  # (TARGET gflags::gflags)

  # set (glog_libraries_options_for_static_linking
  # "${glog_libraries_options_for_static_linking} -lgflags")
endif(gflags_FOUND)

if(ANDROID)
  target_link_libraries(glog PRIVATE log)
  set(glog_libraries_options_for_static_linking
      "${glog_libraries_options_for_static_linking} -llog")
endif(ANDROID)

set_target_properties(glog PROPERTIES VERSION ${PROJECT_VERSION})
set_target_properties(glog PROPERTIES SOVERSION 1)

if(CYGWIN OR WIN32)
  target_compile_definitions(glog PUBLIC GLOG_NO_ABBREVIATED_SEVERITIES)
endif(CYGWIN OR WIN32)

if(WITH_CUSTOM_PREFIX)
  target_compile_definitions(glog PUBLIC GLOG_CUSTOM_PREFIX_SUPPORT)
endif(WITH_CUSTOM_PREFIX)

set_target_properties(glog PROPERTIES PUBLIC_HEADER "${GLOG_PUBLIC_H}")

target_include_directories(
  glog BEFORE
  PUBLIC "$<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}>"
         "$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/src>"
         "$<INSTALL_INTERFACE:${_glog_CMake_INCLUDE_DIR}>"
  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}
  PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/src)

if(CYGWIN OR WIN32)
  target_include_directories(
    glogbase
    PUBLIC "$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/src/windows>"
    PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/src/windows)

  target_include_directories(
    glog
    PUBLIC "$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/src/windows>"
    PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/src/windows)
endif(CYGWIN OR WIN32)

set_target_properties(glog PROPERTIES DEFINE_SYMBOL GOOGLE_GLOG_IS_A_DLL)

target_include_directories(glogbase
                           PUBLIC $<TARGET_PROPERTY:glog,INCLUDE_DIRECTORIES>)
target_compile_definitions(
  glogbase
  PUBLIC $<TARGET_PROPERTY:glog,COMPILE_DEFINITIONS>
  PRIVATE GOOGLE_GLOG_IS_A_DLL)

generate_export_header(glog EXPORT_MACRO_NAME GLOG_EXPORT EXPORT_FILE_NAME
                       ${CMAKE_CURRENT_BINARY_DIR}/glog/export.h)

string(STRIP "${glog_libraries_options_for_static_linking}"
             glog_libraries_options_for_static_linking)

if(WITH_PKGCONFIG)
  set(VERSION ${PROJECT_VERSION})
  set(prefix ${CMAKE_INSTALL_PREFIX})
  set(exec_prefix ${CMAKE_INSTALL_FULL_BINDIR})
  set(libdir ${CMAKE_INSTALL_FULL_LIBDIR})
  set(includedir ${CMAKE_INSTALL_FULL_INCLUDEDIR})

  configure_file("${PROJECT_SOURCE_DIR}/libglog.pc.in"
                 "${PROJECT_BINARY_DIR}/libglog.pc" @ONLY)

  unset(VERSION)
  unset(prefix)
  unset(exec_prefix)
  unset(libdir)
  unset(includedir)
endif(WITH_PKGCONFIG)

# Unit testing

# if(BUILD_TESTING)
if(FALSE)
  add_library(glogtest STATIC $<TARGET_OBJECTS:glogbase>)

  target_include_directories(glogtest
                             PUBLIC $<TARGET_PROPERTY:glog,INCLUDE_DIRECTORIES>)
  target_compile_definitions(
    glogtest PUBLIC $<TARGET_PROPERTY:glog,COMPILE_DEFINITIONS>
                    GLOG_STATIC_DEFINE)
  target_link_libraries(glogtest PUBLIC $<TARGET_PROPERTY:glog,LINK_LIBRARIES>)

  set(_GLOG_TEST_LIBS glogtest)

  if(HAVE_LIB_GTEST)
    list(APPEND _GLOG_TEST_LIBS GTest::gtest)
  endif(HAVE_LIB_GTEST)

  if(HAVE_LIB_GMOCK)
    list(APPEND _GLOG_TEST_LIBS GTest::gmock)
  endif(HAVE_LIB_GMOCK)

  add_executable(logging_unittest src/logging_unittest.cc)

  target_link_libraries(logging_unittest PRIVATE ${_GLOG_TEST_LIBS})

  if(WITH_CUSTOM_PREFIX)
    add_executable(logging_custom_prefix_unittest
                   src/logging_custom_prefix_unittest.cc)

    target_link_libraries(logging_custom_prefix_unittest
                          PRIVATE ${_GLOG_TEST_LIBS})

    add_test(NAME logging_custom_prefix COMMAND logging_custom_prefix_unittest)

    # FIXME: Skip flaky test
    set_tests_properties(
      logging_custom_prefix
      PROPERTIES
        SKIP_REGULAR_EXPRESSION
        "Check failed: time_ns within LogTimes::LOG_PERIOD_TOL_NS of LogTimes::LOG_PERIOD_NS"
    )

    if(APPLE)
      # FIXME: Skip flaky test
      set_property(
        TEST logging_custom_prefix
        APPEND
        PROPERTY
          SKIP_REGULAR_EXPRESSION
          "unexpected new.*PASS\nTest with golden file failed. We'll try to show the diff:"
      )
    endif(APPLE)
  endif(WITH_CUSTOM_PREFIX)

  add_executable(stl_logging_unittest src/stl_logging_unittest.cc)

  target_link_libraries(stl_logging_unittest PRIVATE ${_GLOG_TEST_LIBS})

  if(HAVE_NO_DEPRECATED)
    set_property(
      TARGET stl_logging_unittest
      APPEND
      PROPERTY COMPILE_OPTIONS -Wno-deprecated)
  endif(HAVE_NO_DEPRECATED)

  if(HAVE_UNORDERED_MAP AND HAVE_UNORDERED_SET)
    target_compile_definitions(stl_logging_unittest
                               PRIVATE GLOG_STL_LOGGING_FOR_UNORDERED)
  endif(HAVE_UNORDERED_MAP AND HAVE_UNORDERED_SET)

  if(HAVE_TR1_UNORDERED_MAP AND HAVE_TR1_UNORDERED_SET)
    target_compile_definitions(stl_logging_unittest
                               PRIVATE GLOG_STL_LOGGING_FOR_TR1_UNORDERED)
  endif(HAVE_TR1_UNORDERED_MAP AND HAVE_TR1_UNORDERED_SET)

  if(HAVE_EXT_HASH_MAP AND HAVE_EXT_HASH_SET)
    target_compile_definitions(stl_logging_unittest
                               PRIVATE GLOG_STL_LOGGING_FOR_EXT_HASH)
  endif(HAVE_EXT_HASH_MAP AND HAVE_EXT_HASH_SET)

  if(HAVE_EXT_SLIST)
    target_compile_definitions(stl_logging_unittest
                               PRIVATE GLOG_STL_LOGGING_FOR_EXT_SLIST)
  endif(HAVE_EXT_SLIST)

  if(HAVE_SYMBOLIZE)
    add_executable(symbolize_unittest src/symbolize_unittest.cc)

    target_link_libraries(symbolize_unittest PRIVATE ${_GLOG_TEST_LIBS})
  endif(HAVE_SYMBOLIZE)

  add_executable(demangle_unittest src/demangle_unittest.cc)

  target_link_libraries(demangle_unittest PRIVATE ${_GLOG_TEST_LIBS})

  if(HAVE_STACKTRACE)
    add_executable(stacktrace_unittest src/stacktrace_unittest.cc)

    target_link_libraries(stacktrace_unittest PRIVATE ${_GLOG_TEST_LIBS})
  endif(HAVE_STACKTRACE)

  add_executable(utilities_unittest src/utilities_unittest.cc)

  target_link_libraries(utilities_unittest PRIVATE ${_GLOG_TEST_LIBS})

  if(HAVE_STACKTRACE AND HAVE_SYMBOLIZE)
    add_executable(signalhandler_unittest src/signalhandler_unittest.cc)

    target_link_libraries(signalhandler_unittest PRIVATE ${_GLOG_TEST_LIBS})
  endif(HAVE_STACKTRACE AND HAVE_SYMBOLIZE)

  add_test(NAME demangle COMMAND demangle_unittest)
  add_test(NAME logging COMMAND logging_unittest)

  set_tests_properties(logging PROPERTIES TIMEOUT 30)

  # FIXME: Skip flaky test
  set_tests_properties(
    logging
    PROPERTIES
      SKIP_REGULAR_EXPRESSION
      "Check failed: time_ns within LogTimes::LOG_PERIOD_TOL_NS of LogTimes::LOG_PERIOD_NS"
  )

  if(APPLE)
    # FIXME: Skip flaky test
    set_property(
      TEST logging
      APPEND
      PROPERTY
        SKIP_REGULAR_EXPRESSION
        "unexpected new.*PASS\nTest with golden file failed. We'll try to show the diff:"
    )
  endif(APPLE)

  if(TARGET signalhandler_unittest)
    add_test(NAME signalhandler COMMAND signalhandler_unittest)
  endif(TARGET signalhandler_unittest)

  if(TARGET stacktrace_unittest)
    add_test(NAME stacktrace COMMAND stacktrace_unittest)
    set_tests_properties(stacktrace PROPERTIES TIMEOUT 30)
  endif(TARGET stacktrace_unittest)

  add_test(NAME stl_logging COMMAND stl_logging_unittest)

  if(TARGET symbolize_unittest)
    add_test(NAME symbolize COMMAND symbolize_unittest)
  endif(TARGET symbolize_unittest)

  if(HAVE_LIB_GMOCK)
    add_executable(mock-log_unittest src/mock-log_unittest.cc src/mock-log.h)

    target_link_libraries(mock-log_unittest PRIVATE ${_GLOG_TEST_LIBS})

    add_test(NAME mock-log COMMAND mock-log_unittest)
  endif(HAVE_LIB_GMOCK)

  # Generate an initial cache

  get_cache_variables(_CACHEVARS)

  set(_INITIAL_CACHE
      ${CMAKE_CURRENT_BINARY_DIR}/test_package_config/glog_package_config_initial_cache.cmake
  )

  # Package config test

  add_test(
    NAME cmake_package_config_init
    COMMAND
      ${CMAKE_COMMAND}
      -DTEST_BINARY_DIR=${CMAKE_CURRENT_BINARY_DIR}/test_package_config
      -DINITIAL_CACHE=${_INITIAL_CACHE} -DCACHEVARS=${_CACHEVARS} -P
      ${CMAKE_CURRENT_SOURCE_DIR}/cmake/TestInitPackageConfig.cmake)

  add_test(
    NAME cmake_package_config_generate
    COMMAND
      ${CMAKE_COMMAND} -DGENERATOR=${CMAKE_GENERATOR}
      -DGENERATOR_PLATFORM=${CMAKE_GENERATOR_PLATFORM}
      -DGENERATOR_TOOLSET=${CMAKE_GENERATOR_TOOLSET}
      -DINITIAL_CACHE=${_INITIAL_CACHE}
      -DPACKAGE_DIR=${CMAKE_CURRENT_BINARY_DIR} -DPATH=$ENV{PATH}
      -DSOURCE_DIR=${CMAKE_CURRENT_SOURCE_DIR}/src/package_config_unittest/working_config
      -DTEST_BINARY_DIR=${CMAKE_CURRENT_BINARY_DIR}/test_package_config/working_config
      -P ${CMAKE_CURRENT_SOURCE_DIR}/cmake/TestPackageConfig.cmake)

  add_test(
    NAME cmake_package_config_build
    COMMAND
      ${CMAKE_COMMAND} --build
      ${CMAKE_CURRENT_BINARY_DIR}/test_package_config/working_config --config
      $<CONFIG>)

  add_test(NAME cmake_package_config_cleanup
           COMMAND ${CMAKE_COMMAND} -E remove_directory
                   ${CMAKE_CURRENT_BINARY_DIR}/test_package_config)

  # Fixtures setup
  set_tests_properties(cmake_package_config_init
                       PROPERTIES FIXTURES_SETUP cmake_package_config)
  set_tests_properties(cmake_package_config_generate
                       PROPERTIES FIXTURES_SETUP cmake_package_config_working)

  # Fixtures cleanup
  set_tests_properties(cmake_package_config_cleanup
                       PROPERTIES FIXTURES_CLEANUP cmake_package_config)

  # Fixture requirements
  set_tests_properties(cmake_package_config_generate
                       PROPERTIES FIXTURES_REQUIRED cmake_package_config)
  set_tests_properties(
    cmake_package_config_build
    PROPERTIES FIXTURES_REQUIRED
               "cmake_package_config;cmake_package_config_working")

  add_executable(cleanup_immediately_unittest
                 src/cleanup_immediately_unittest.cc)

  target_link_libraries(cleanup_immediately_unittest PRIVATE ${_GLOG_TEST_LIBS})

  add_executable(cleanup_with_absolute_prefix_unittest
                 src/cleanup_with_absolute_prefix_unittest.cc)

  target_link_libraries(cleanup_with_absolute_prefix_unittest
                        PRIVATE ${_GLOG_TEST_LIBS})

  add_executable(cleanup_with_relative_prefix_unittest
                 src/cleanup_with_relative_prefix_unittest.cc)

  target_link_libraries(cleanup_with_relative_prefix_unittest
                        PRIVATE ${_GLOG_TEST_LIBS})

  set(CLEANUP_LOG_DIR ${CMAKE_CURRENT_BINARY_DIR}/cleanup_tests)

  add_test(NAME cleanup_init COMMAND ${CMAKE_COMMAND} -E make_directory
                                     ${CLEANUP_LOG_DIR})
  add_test(NAME cleanup_logdir COMMAND ${CMAKE_COMMAND} -E remove_directory
                                       ${CLEANUP_LOG_DIR})
  add_test(
    NAME cleanup_immediately
    COMMAND
      ${CMAKE_COMMAND} -DLOGCLEANUP=$<TARGET_FILE:cleanup_immediately_unittest>
      # NOTE The trailing slash is important
      -DTEST_DIR=${CLEANUP_LOG_DIR}/ -P
      ${CMAKE_CURRENT_SOURCE_DIR}/cmake/RunCleanerTest1.cmake
    WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
  add_test(
    NAME cleanup_with_absolute_prefix
    COMMAND
      ${CMAKE_COMMAND}
      -DLOGCLEANUP=$<TARGET_FILE:cleanup_with_absolute_prefix_unittest>
      -DTEST_DIR=${CMAKE_CURRENT_BINARY_DIR}/ -P
      ${CMAKE_CURRENT_SOURCE_DIR}/cmake/RunCleanerTest2.cmake
    WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
  add_test(
    NAME cleanup_with_relative_prefix
    COMMAND
      ${CMAKE_COMMAND}
      -DLOGCLEANUP=$<TARGET_FILE:cleanup_with_relative_prefix_unittest>
      -DTEST_DIR=${CMAKE_CURRENT_BINARY_DIR}/ -DTEST_SUBDIR=test_subdir/ -P
      ${CMAKE_CURRENT_SOURCE_DIR}/cmake/RunCleanerTest3.cmake
    WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})

  # Fixtures setup
  set_tests_properties(cleanup_init PROPERTIES FIXTURES_SETUP logcleanuptest)
  # Fixtures cleanup
  set_tests_properties(cleanup_logdir PROPERTIES FIXTURES_CLEANUP
                                                 logcleanuptest)
  # Fixture requirements
  set_tests_properties(cleanup_immediately PROPERTIES FIXTURES_REQUIRED
                                                      logcleanuptest)
  set_tests_properties(cleanup_with_absolute_prefix PROPERTIES FIXTURES_REQUIRED
                                                               logcleanuptest)
  set_tests_properties(cleanup_with_relative_prefix PROPERTIES FIXTURES_REQUIRED
                                                               logcleanuptest)
endif()
# endif(BUILD_TESTING)

# install (TARGETS glog EXPORT glog-targets RUNTIME DESTINATION
# ${_glog_CMake_BINDIR} PUBLIC_HEADER DESTINATION
# ${_glog_CMake_INCLUDE_DIR}/glog LIBRARY DESTINATION ${_glog_CMake_LIBDIR}
# ARCHIVE DESTINATION ${_glog_CMake_LIBDIR})
#
if(WITH_PKGCONFIG)
  install(FILES "${PROJECT_BINARY_DIR}/libglog.pc"
          DESTINATION "${_glog_CMake_LIBDIR}/pkgconfig")
endif(WITH_PKGCONFIG)

set(glog_CMake_VERSION 3.0)

# if (gflags_FOUND) # Ensure clients locate only the package config and not
# third party find # modules having the same name. This avoid cmake_policy
# PUSH/POP errors. if (CMAKE_VERSION VERSION_LESS 3.9) set (gflags_DEPENDENCY
# "find_dependency (gflags ${gflags_VERSION})") else (CMAKE_VERSION VERSION_LESS
# 3.9) # Passing additional find_package arguments to find_dependency is
# possible # starting with CMake 3.9. set (glog_CMake_VERSION 3.9) set
# (gflags_DEPENDENCY "find_dependency (gflags ${gflags_VERSION} NO_MODULE)")
# endif (CMAKE_VERSION VERSION_LESS 3.9) endif (gflags_FOUND)

# configure_package_config_file( glog-config.cmake.in
# ${CMAKE_CURRENT_BINARY_DIR}/glog-config.cmake INSTALL_DESTINATION
# ${_glog_CMake_INSTALLDIR} NO_CHECK_REQUIRED_COMPONENTS_MACRO)
#
# write_basic_package_version_file(
# ${CMAKE_CURRENT_BINARY_DIR}/glog-config-version.cmake COMPATIBILITY
# SameMajorVersion)

# export (TARGETS glog NAMESPACE glog:: FILE glog-targets.cmake) export (PACKAGE
# glog)

get_filename_component(_PREFIX "${CMAKE_INSTALL_PREFIX}" ABSOLUTE)

# Directory containing the find modules relative to the config install
# directory.
file(RELATIVE_PATH glog_REL_CMake_MODULES ${_PREFIX}/${_glog_CMake_INSTALLDIR}
     ${_PREFIX}/${_glog_CMake_DATADIR}/glog-modules.cmake)

get_filename_component(glog_REL_CMake_DATADIR ${glog_REL_CMake_MODULES}
                       DIRECTORY)

set(glog_FULL_CMake_DATADIR ${CMAKE_CURRENT_BINARY_DIR}/${_glog_CMake_DATADIR})

# configure_file(glog-modules.cmake.in
# ${CMAKE_CURRENT_BINARY_DIR}/glog-modules.cmake @ONLY)

install(
  CODE "
set (glog_FULL_CMake_DATADIR \"\\\${CMAKE_CURRENT_LIST_DIR}/${glog_REL_CMake_DATADIR}\")
set (glog_DATADIR_DESTINATION ${_glog_CMake_INSTALLDIR})

if (NOT IS_ABSOLUTE ${_glog_CMake_INSTALLDIR})
  set (glog_DATADIR_DESTINATION \"\${CMAKE_INSTALL_PREFIX}/\${glog_DATADIR_DESTINATION}\")
endif (NOT IS_ABSOLUTE ${_glog_CMake_INSTALLDIR})

configure_file (\"${CMAKE_CURRENT_SOURCE_DIR}/glog-modules.cmake.in\"
  \"${CMAKE_CURRENT_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/glog-modules.cmake\" @ONLY)
file (INSTALL
  \"${CMAKE_CURRENT_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/glog-modules.cmake\"
  DESTINATION
  \"\${glog_DATADIR_DESTINATION}\")
"
  COMPONENT Development)

# install (FILES ${CMAKE_CURRENT_BINARY_DIR}/glog-config.cmake
# ${CMAKE_CURRENT_BINARY_DIR}/glog-config-version.cmake DESTINATION
# ${_glog_CMake_INSTALLDIR})

# Find modules in share/glog/cmake install (DIRECTORY
# ${_glog_BINARY_CMake_DATADIR} DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/glog
# COMPONENT Development FILES_MATCHING PATTERN "*.cmake" )

# install (EXPORT glog-targets NAMESPACE glog:: DESTINATION
# ${_glog_CMake_INSTALLDIR})