admin/CMakeModules/FindCompilerVisibility.cmake

   1 SET(VAR HAVE_VISIBILITY)
   2
   3 IF(NOT DEFINED ${VAR})
   4   SET(SOURCE
   5 "void __attribute__((visibility(\"default\"))) test() {}
   6 #ifdef __INTEL_COMPILER
   7 #error ICC breaks with binutils and visibility
   8 #endif
   9 int main(){}
  10 ")
  11   FILE(WRITE "${CMAKE_BINARY_DIR}/CMakeTmp/src.c" "${SOURCE}")
  12
  13   MESSAGE(STATUS "Performing Test ${VAR}")
  14   TRY_COMPILE(${VAR}
  15               ${CMAKE_BINARY_DIR}
  16               ${CMAKE_BINARY_DIR}/CMakeTmp/src.c
  17               CMAKE_FLAGS
  18               "-DCOMPILE_DEFINITIONS:STRING=-fvisibility=hidden"
  19               OUTPUT_VARIABLE OUTPUT)
  20
  21   WRITE_FILE(${CMAKE_BINARY_DIR}/CMakeOutput.log
  22              "Performing manual C SOURCE FILE Test ${VAR} with the following output:\n"
  23              "${OUTPUT}\n"
  24              "Source file was:\n${SOURCE}\n" APPEND)
  25
  26   SET(${VAR} ${${VAR}} CACHE INTERNAL "Test Visibility")
  27   IF(${VAR})
  28     MESSAGE(STATUS "Performing Test ${VAR} - Success")
  29   ELSE(${VAR})
  30     MESSAGE(STATUS "Performing Test ${VAR} - Failed")
  31   ENDIF(${VAR})
  32 ENDIF(NOT DEFINED ${VAR})
  33
  34 IF(${VAR})
  35   ADD_DEFINITIONS(-fvisibility=hidden)
  36   ADD_DEFINITIONS(-DHAVE_GCC_VISIBILITY)
  37 ENDIF(${VAR})