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(SOCKET_WRAPPER_PACKAGE ${PROJECT_NAME})
  11 set(SOCKET_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(netinet/tcp_fsm.h HAVE_NETINET_TCP_FSM_H)
  47 check_include_file(sys/filio.h HAVE_SYS_FILIO_H)
  48 check_include_file(sys/signalfd.h HAVE_SYS_SIGNALFD_H)
  49 check_include_file(sys/eventfd.h HAVE_SYS_EVENTFD_H)
  50 check_include_file(sys/timerfd.h HAVE_SYS_TIMERFD_H)
  51 check_include_file(gnu/lib-names.h HAVE_GNU_LIB_NAMES_H)
  52 check_include_file(rpc/rpc.h HAVE_RPC_RPC_H)
  53
  54 # SYMBOLS
  55 set(CMAKE_REQUIRED_FLAGS -D_GNU_SOURCE)
  56 check_symbol_exists(program_invocation_short_name
  57                     "errno.h"
  58                     HAVE_PROGRAM_INVOCATION_SHORT_NAME)
  59 unset(CMAKE_REQUIRED_FLAGS)
  60
  61 # FUNCTIONS
  62 check_function_exists(strncpy HAVE_STRNCPY)
  63 check_function_exists(vsnprintf HAVE_VSNPRINTF)
  64 check_function_exists(snprintf HAVE_SNPRINTF)
  65 check_function_exists(signalfd HAVE_SIGNALFD)
  66 check_function_exists(eventfd HAVE_EVENTFD)
  67 check_function_exists(timerfd_create HAVE_TIMERFD_CREATE)
  68 check_function_exists(bindresvport HAVE_BINDRESVPORT)
  69 check_function_exists(accept4 HAVE_ACCEPT4)
  70 check_function_exists(open64 HAVE_OPEN64)
  71 check_function_exists(fopen64 HAVE_FOPEN64)
  72 check_function_exists(getprogname HAVE_GETPROGNAME)
  73 check_function_exists(getexecname HAVE_GETEXECNAME)
  74 check_function_exists(pledge HAVE_PLEDGE)
  75 check_function_exists(_socket HAVE__SOCKET)
  76 check_function_exists(_close HAVE__CLOSE)
  77
  78 if (UNIX)
  79     find_library(DLFCN_LIBRARY dl)
  80     if (DLFCN_LIBRARY)
  81         list(APPEND _REQUIRED_LIBRARIES ${DLFCN_LIBRARY})
  82     else()
  83         check_function_exists(dlopen HAVE_DLOPEN)
  84         if (NOT HAVE_DLOPEN)
  85             message(FATAL_ERROR "FATAL: No dlopen() function detected")
  86         endif()
  87     endif()
  88
  89     if (NOT LINUX)
  90         # libsocket (Solaris)
  91         check_library_exists(socket getaddrinfo "" HAVE_LIBSOCKET)
  92         if (HAVE_LIBSOCKET)
  93             list(APPEND _REQUIRED_LIBRARIES socket)
  94         endif (HAVE_LIBSOCKET)
  95
  96         # libnsl/inet_pton (Solaris)
  97         check_library_exists(nsl inet_pton "" HAVE_LIBNSL)
  98         if (HAVE_LIBNSL)
  99             list(APPEND _REQUIRED_LIBRARIES nsl)
 100         endif (HAVE_LIBNSL)
 101     endif (NOT LINUX)
 102
 103     check_function_exists(getaddrinfo HAVE_GETADDRINFO)
 104 endif (UNIX)
 105
 106 # STRUCTS
 107 check_struct_has_member("struct in_pktinfo" ipi_addr "sys/types.h;sys/socket.h;netinet/in.h" HAVE_STRUCT_IN_PKTINFO)
 108 set(CMAKE_REQUIRED_FLAGS -D_GNU_SOURCE)
 109 check_struct_has_member("struct in6_pktinfo" ipi6_addr "sys/types.h;sys/socket.h;netinet/in.h" HAVE_STRUCT_IN6_PKTINFO)
 110 unset(CMAKE_REQUIRED_FLAGS)
 111
 112 # STRUCT MEMBERS
 113 check_struct_has_member("struct sockaddr" sa_len "sys/types.h;sys/socket.h;netinet/in.h" HAVE_STRUCT_SOCKADDR_SA_LEN)
 114 check_struct_has_member("struct msghdr" msg_control "sys/types.h;sys/socket.h" HAVE_STRUCT_MSGHDR_MSG_CONTROL)
 115
 116 # PROTOTYPES
 117 check_prototype_definition(gettimeofday
 118     "int gettimeofday(struct timeval *tv, struct timezone *tz)"
 119     "-1"
 120     "sys/time.h"
 121     HAVE_GETTIMEOFDAY_TZ)
 122
 123 check_prototype_definition(gettimeofday
 124     "int gettimeofday(struct timeval *tv, void *tzp)"
 125     "-1"
 126     "sys/time.h"
 127     HAVE_GETTIMEOFDAY_TZ_VOID)
 128
 129 check_prototype_definition(accept
 130     "int accept(int s, struct sockaddr *addr, Psocklen_t addrlen)"
 131     "-1"
 132     "sys/types.h;sys/socket.h"
 133     HAVE_ACCEPT_PSOCKLEN_T)
 134
 135 check_prototype_definition(ioctl
 136     "int ioctl(int s, int r, ...)"
 137     "-1"
 138     "unistd.h;sys/ioctl.h"
 139     HAVE_IOCTL_INT)
 140
 141 if (HAVE_EVENTFD)
 142     check_prototype_definition(eventfd
 143         "int eventfd(unsigned int count, int flags)"
 144         "-1"
 145         "sys/eventfd.h"
 146         HAVE_EVENTFD_UNSIGNED_INT)
 147 endif (HAVE_EVENTFD)
 148
 149 # IPV6
 150 check_c_source_compiles("
 151     #include <stdlib.h>
 152     #include <sys/socket.h>
 153     #include <netdb.h>
 154     #include <netinet/in.h>
 155     #include <net/if.h>
 156
 157 int main(void) {
 158     struct sockaddr_storage sa_store;
 159     struct addrinfo *ai = NULL;
 160     struct in6_addr in6addr;
 161     int idx = if_nametoindex(\"iface1\");
 162     int s = socket(AF_INET6, SOCK_STREAM, 0);
 163     int ret = getaddrinfo(NULL, NULL, NULL, &ai);
 164     if (ret != 0) {
 165         const char *es = gai_strerror(ret);
 166     }
 167
 168     freeaddrinfo(ai);
 169     {
 170         int val = 1;
 171 #ifdef HAVE_LINUX_IPV6_V6ONLY_26
 172 #define IPV6_V6ONLY 26
 173 #endif
 174         ret = setsockopt(s, IPPROTO_IPV6, IPV6_V6ONLY,
 175                          (const void *)&val, sizeof(val));
 176     }
 177
 178     return 0;
 179 }" HAVE_IPV6)
 180
 181 check_c_source_compiles("
 182 #include <sys/socket.h>
 183
 184 int main(void) {
 185     struct sockaddr_storage s;
 186
 187     return 0;
 188 }" HAVE_SOCKADDR_STORAGE)
 189
 190 ###########################################################
 191 # For detecting attributes we need to treat warnings as
 192 # errors
 193 set(CMAKE_REQUIRED_FLAGS "-Werror")
 194
 195 check_c_source_compiles("
 196 void test_constructor_attribute(void) __attribute__ ((constructor));
 197
 198 void test_constructor_attribute(void)
 199 {
 200     return;
 201 }
 202
 203 int main(void) {
 204     return 0;
 205 }" HAVE_CONSTRUCTOR_ATTRIBUTE)
 206
 207 check_c_source_compiles("
 208 void test_destructor_attribute(void) __attribute__ ((destructor));
 209
 210 void test_destructor_attribute(void)
 211 {
 212     return;
 213 }
 214
 215 int main(void) {
 216     return 0;
 217 }" HAVE_DESTRUCTOR_ATTRIBUTE)
 218
 219 check_c_source_compiles("
 220 #pragma init (test_constructor)
 221 void test_constructor(void);
 222
 223 void test_constructor(void)
 224 {
 225     return;
 226 }
 227
 228 int main(void) {
 229     return 0;
 230 }" HAVE_PRAGMA_INIT)
 231
 232 check_c_source_compiles("
 233 #pragma fini (test_destructor)
 234 void test_destructor(void);
 235
 236 void test_destructor(void)
 237 {
 238     return;
 239 }
 240
 241 int main(void) {
 242     return 0;
 243 }" HAVE_PRAGMA_FINI)
 244
 245 check_c_source_compiles("
 246 #define FALL_THROUGH __attribute__((fallthrough))
 247
 248 int main(void) {
 249     int i = 2;
 250
 251     switch (i) {
 252     case 0:
 253         FALL_THROUGH;
 254     case 1:
 255         break;
 256     default:
 257         break;
 258     }
 259
 260     return 0;
 261 }" HAVE_FALLTHROUGH_ATTRIBUTE)
 262
 263 check_c_source_compiles("
 264 __thread int tls;
 265
 266 int main(void) {
 267     return 0;
 268 }" HAVE_GCC_THREAD_LOCAL_STORAGE)
 269
 270 check_c_source_compiles("
 271 void log_fn(const char *format, ...) __attribute__ ((format (printf, 1, 2)));
 272
 273 int main(void) {
 274     return 0;
 275 }" HAVE_FUNCTION_ATTRIBUTE_FORMAT)
 276
 277 check_c_source_compiles("
 278 void test_address_sanitizer_attribute(void) __attribute__((no_sanitize_address));
 279
 280 void test_address_sanitizer_attribute(void)
 281 {
 282     return;
 283 }
 284
 285 int main(void) {
 286     return 0;
 287 }" HAVE_ADDRESS_SANITIZER_ATTRIBUTE)
 288
 289 # Stop treating wanrings as errors
 290 unset(CMAKE_REQUIRED_FLAGS)
 291 ###########################################################
 292
 293 if (OSX)
 294     set(HAVE_APPLE 1)
 295 endif (OSX)
 296
 297 # ENDIAN
 298 if (NOT WIN32)
 299     test_big_endian(WORDS_BIGENDIAN)
 300 endif (NOT WIN32)
 301
 302 check_type_size(pid_t SIZEOF_PID_T)
 303
 304 set(SWRAP_REQUIRED_LIBRARIES ${_REQUIRED_LIBRARIES} CACHE INTERNAL "socket_wrapper required system libraries")