CMake/FollySetup.cmake

   1 # folly-config.h is a generated file from autotools
   2 # We need to do the equivalent checks here and use
   3 # add_definitions as needed
   4 add_definitions(-DFOLLY_NO_CONFIG=1)
   5
   6 INCLUDE(CheckCXXSourceCompiles)
   7 CHECK_CXX_SOURCE_COMPILES("
   8 extern \"C\" void (*test_ifunc(void))() { return 0; }
   9 void func() __attribute__((ifunc(\"test_ifunc\")));
  10 " FOLLY_IFUNC)
  11 if (FOLLY_IFUNC)
  12   add_definitions("-DHAVE_IFUNC=1")
  13 endif()
  14
  15 if (LINUX OR FREEBSD)
  16   set(CMAKE_REQUIRED_LIBRARIES rt ${LIBPTHREAD_LIBRARIES})
  17 else()
  18   set(CMAKE_REQUIRED_LIBRARIES ${LIBPTHREAD_LIBRARIES})
  19 endif()
  20
  21 include(CheckFunctionExists)
  22 CHECK_FUNCTION_EXISTS("clock_gettime" HAVE_CLOCK_GETTIME)
  23 CHECK_FUNCTION_EXISTS("pthread_atfork" HAVE_PTHREAD_ATFORK)
  24 CHECK_FUNCTION_EXISTS("pthread_spin_lock" HAVE_PTHREAD_SPINLOCK)
  25
  26 if (HAVE_CLOCK_GETTIME)
  27   add_definitions("-DFOLLY_HAVE_CLOCK_GETTIME=1")
  28 endif()
  29 if (HAVE_PTHREAD_ATFORK)
  30   add_definitions("-DFOLLY_HAVE_PTHREAD_ATFORK=1")
  31 endif()
  32 if (HAVE_PTHREAD_SPINLOCK)
  33   add_definitions("-DFOLLY_HAVE_PTHREAD_SPINLOCK_T=1")
  34 endif()
  35 set(CMAKE_REQUIRED_LIBRARIES)
  36
  37 find_path(FEATURES_H_INCLUDE_DIR NAMES features.h)
  38 if (FEATURES_H_INCLUDE_DIR)
  39   include_directories("${FEATURES_H_INCLUDE_DIR}")
  40   add_definitions("-DFOLLY_HAVE_FEATURES_H=1")
  41 endif()
  42
  43 if(CYGWIN)
  44 # cygwin has c99 issues with cxx compiler and headers
  45   add_definitions("-D_GLIBCXX_USE_C99_DYNAMIC")
  46 endif()
  47
  48 if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
  49   if(NOT CLANG_FORCE_LIBSTDCXX)
  50     add_definitions("-DFOLLY_USE_LIBCPP=1")
  51   endif()
  52 endif()
  53
  54 CHECK_CXX_SOURCE_COMPILES("
  55 int main(int argc, char** argv) {
  56   unsigned size = argc;
  57   char data[size];
  58   return 0;
  59 }
  60 " FOLLY_HAVE_VLA)
  61 if (FOLLY_HAVE_VLA)
  62   add_definitions("-DFOLLY_HAVE_VLA=1")
  63 elseif()
  64   add_definitions("-DFOLLY_HAVE_VLA=0")
  65 endif()