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