ConfigureChecks.cmake

   1 include(CheckIncludeFile)
   2 include(CheckSymbolExists)
   3 include(CheckFunctionExists)
   4 include(CheckLibraryExists)
   5 include(CheckTypeSize)
   6 include(CheckStructHasMember)
   7 include(CheckPrototypeDefinition)
   8 include(TestBigEndian)
   9
  10 set(PRIV_WRAPPER_PACKAGE ${PROJECT_NAME})
  11 set(PRIV_WRAPPER_VERSION ${PROJECT_VERSION})
  12
  13 set(BINARYDIR ${CMAKE_BINARY_DIR})
  14 set(SOURCEDIR ${CMAKE_SOURCE_DIR})
  15
  16 function(COMPILER_DUMPVERSION _OUTPUT_VERSION)
  17     # Remove whitespaces from the argument.
  18     # This is needed for CC="ccache gcc" cmake ..
  19     string(REPLACE " " "" _C_COMPILER_ARG "${CMAKE_C_COMPILER_ARG1}")
  20
  21     execute_process(
  22         COMMAND
  23             ${CMAKE_C_COMPILER} ${_C_COMPILER_ARG} -dumpversion
  24         OUTPUT_VARIABLE _COMPILER_VERSION
  25     )
  26
  27     string(REGEX REPLACE "([0-9])\\.([0-9])(\\.[0-9])?" "\\1\\2"
  28            _COMPILER_VERSION "${_COMPILER_VERSION}")
  29
  30     set(${_OUTPUT_VERSION} ${_COMPILER_VERSION} PARENT_SCOPE)
  31 endfunction()
  32
  33 if(CMAKE_COMPILER_IS_GNUCC AND NOT MINGW AND NOT OS2)
  34     compiler_dumpversion(GNUCC_VERSION)
  35     if (NOT GNUCC_VERSION EQUAL 34)
  36         set(CMAKE_REQUIRED_FLAGS "-fvisibility=hidden")
  37         check_c_source_compiles(
  38 "void __attribute__((visibility(\"default\"))) test() {}
  39 int main(void){ return 0; }
  40 " WITH_VISIBILITY_HIDDEN)
  41         unset(CMAKE_REQUIRED_FLAGS)
  42     endif (NOT GNUCC_VERSION EQUAL 34)
  43 endif(CMAKE_COMPILER_IS_GNUCC AND NOT MINGW AND NOT OS2)
  44
  45 # HEADERS
  46 check_include_file(sys/prctl.h HAVE_SYS_PRCTL_H)
  47 check_include_file(sys/time.h HAVE_SYS_TIME_H)
  48 check_include_file(sys/resource.h HAVE_SYS_RESOURCE_H)
  49
  50 # FUNCTIONS
  51 check_function_exists(chroot HAVE_CHROOT)
  52 check_function_exists(prctl HAVE_PRCTL)
  53 check_function_exists(pledge HAVE_PLEDGE)
  54 check_function_exists(setrlimit HAVE_SETRLIMIT)
  55
  56 check_prototype_definition(setrlimit
  57     "int setrlimit(__rlimit_resource_t resource, const struct rlimit *rlp)"
  58     "-1"
  59     "sys/resource.h"
  60     HAVE_SETRLIMIT_RLIMIT_RESOURCE_T)
  61
  62 if (UNIX)
  63     find_library(DLFCN_LIBRARY dl)
  64     if (DLFCN_LIBRARY)
  65         list(APPEND _REQUIRED_LIBRARIES ${DLFCN_LIBRARY})
  66     else()
  67         check_function_exists(dlopen HAVE_DLOPEN)
  68         if (NOT HAVE_DLOPEN)
  69             message(FATAL_ERROR "FATAL: No dlopen() function detected")
  70         endif()
  71     endif()
  72 endif (UNIX)
  73
  74 ###########################################################
  75 # For detecting attributes we need to treat warnings as
  76 # errors
  77 set(CMAKE_REQUIRED_FLAGS "-Werror")
  78
  79 check_c_source_compiles("
  80 void test_constructor_attribute(void) __attribute__ ((constructor));
  81
  82 void test_constructor_attribute(void)
  83 {
  84     return;
  85 }
  86
  87 int main(void) {
  88     return 0;
  89 }" HAVE_CONSTRUCTOR_ATTRIBUTE)
  90
  91 check_c_source_compiles("
  92 void test_destructor_attribute(void) __attribute__ ((destructor));
  93
  94 void test_destructor_attribute(void)
  95 {
  96     return;
  97 }
  98
  99 int main(void) {
 100     return 0;
 101 }" HAVE_DESTRUCTOR_ATTRIBUTE)
 102
 103 check_c_source_compiles("
 104 #define FALL_THROUGH __attribute__((fallthrough))
 105
 106 int main(void) {
 107     int i = 2;
 108
 109     switch (i) {
 110     case 0:
 111         FALL_THROUGH;
 112     case 1:
 113         break;
 114     default:
 115         break;
 116     }
 117
 118     return 0;
 119 }" HAVE_FALLTHROUGH_ATTRIBUTE)
 120
 121 check_c_source_compiles("
 122 void log_fn(const char *format, ...) __attribute__ ((format (printf, 1, 2)));
 123
 124 int main(void) {
 125     return 0;
 126 }" HAVE_FUNCTION_ATTRIBUTE_FORMAT)
 127
 128 check_c_source_compiles("
 129 void test_address_sanitizer_attribute(void) __attribute__((no_sanitize_address));
 130
 131 void test_address_sanitizer_attribute(void)
 132 {
 133     return;
 134 }
 135
 136 int main(void) {
 137     return 0;
 138 }" HAVE_ADDRESS_SANITIZER_ATTRIBUTE)
 139
 140 # Stop treating wanrings as errors
 141 unset(CMAKE_REQUIRED_FLAGS)
 142 ###########################################################
 143 # ENDIAN
 144 if (NOT WIN32)
 145     test_big_endian(WORDS_BIGENDIAN)
 146 endif (NOT WIN32)
 147
 148 set(PWRAP_REQUIRED_LIBRARIES ${_REQUIRED_LIBRARIES} CACHE INTERNAL "priv_wrapper required system libraries")