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(PACKAGE ${PROJECT_NAME})
  11 set(VERSION ${PROJECT_VERSION})
  12 set(DATADIR ${DATA_INSTALL_DIR})
  13 set(LIBDIR ${LIB_INSTALL_DIR})
  14 set(PLUGINDIR "${PLUGIN_INSTALL_DIR}-${LIBRARY_SOVERSION}")
  15 set(SYSCONFDIR ${SYSCONF_INSTALL_DIR})
  16
  17 set(BINARYDIR ${resolv_wrapper_BINARY_DIR})
  18 set(SOURCEDIR ${resolv_wrapper_SOURCE_DIR})
  19
  20 function(COMPILER_DUMPVERSION _OUTPUT_VERSION)
  21     # Remove whitespaces from the argument.
  22     # This is needed for CC="ccache gcc" cmake ..
  23     string(REPLACE " " "" _C_COMPILER_ARG "${CMAKE_C_COMPILER_ARG1}")
  24
  25     execute_process(
  26         COMMAND
  27             ${CMAKE_C_COMPILER} ${_C_COMPILER_ARG} -dumpversion
  28         OUTPUT_VARIABLE _COMPILER_VERSION
  29     )
  30
  31     string(REGEX REPLACE "([0-9])\\.([0-9])(\\.[0-9])?" "\\1\\2"
  32            _COMPILER_VERSION "${_COMPILER_VERSION}")
  33
  34     set(${_OUTPUT_VERSION} ${_COMPILER_VERSION} PARENT_SCOPE)
  35 endfunction()
  36
  37 if(CMAKE_COMPILER_IS_GNUCC AND NOT MINGW AND NOT OS2)
  38     compiler_dumpversion(GNUCC_VERSION)
  39     if (NOT GNUCC_VERSION EQUAL 34)
  40         set(CMAKE_REQUIRED_FLAGS "-fvisibility=hidden")
  41         check_c_source_compiles(
  42 "void __attribute__((visibility(\"default\"))) test() {}
  43 int main(void){ return 0; }
  44 " WITH_VISIBILITY_HIDDEN)
  45         unset(CMAKE_REQUIRED_FLAGS)
  46     endif (NOT GNUCC_VERSION EQUAL 34)
  47 endif(CMAKE_COMPILER_IS_GNUCC AND NOT MINGW AND NOT OS2)
  48
  49 # HEADERS
  50 check_include_file(sys/types.h HAVE_SYS_TYPES_H)
  51 check_include_file(resolv.h HAVE_RESOLV_H)
  52 check_include_file(arpa/nameser.h HAVE_ARPA_NAMESER_H)
  53
  54 # FUNCTIONS
  55 find_library(RESOLV_LIRBRARY resolv)
  56 if (RESOLV_LIRBRARY)
  57     set(HAVE_LIBRESOLV TRUE)
  58
  59     # If we have a libresolv, we need to check functions linking the library
  60     list(APPEND _REQUIRED_LIBRARIES ${RESOLV_LIRBRARY})
  61 else()
  62     message(STATUS "libresolv not found on ${CMAKE_SYSTEM_NAME}: Only dns faking will be available")
  63 endif()
  64
  65 set(CMAKE_REQUIRED_LIBRARIES ${RESOLV_LIRBRARY})
  66 check_function_exists(res_send HAVE_RES_SEND)
  67 check_function_exists(__res_send HAVE___RES_SEND)
  68 unset(CMAKE_REQUIRED_LIBRARIES)
  69
  70 set(CMAKE_REQUIRED_LIBRARIES ${RESOLV_LIRBRARY})
  71 check_function_exists(res_init HAVE_RES_INIT)
  72 check_function_exists(__res_init HAVE___RES_INIT)
  73 unset(CMAKE_REQUIRED_LIBRARIES)
  74
  75 set(CMAKE_REQUIRED_LIBRARIES ${RESOLV_LIRBRARY})
  76 check_function_exists(res_ninit HAVE_RES_NINIT)
  77 check_function_exists(__res_ninit HAVE___RES_NINIT)
  78 unset(CMAKE_REQUIRED_LIBRARIES)
  79
  80 set(CMAKE_REQUIRED_LIBRARIES ${RESOLV_LIRBRARY})
  81 check_function_exists(res_close HAVE_RES_CLOSE)
  82 check_function_exists(__res_close HAVE___RES_CLOSE)
  83 unset(CMAKE_REQUIRED_LIBRARIES)
  84
  85 set(CMAKE_REQUIRED_LIBRARIES ${RESOLV_LIRBRARY})
  86 check_function_exists(res_nclose HAVE_RES_NCLOSE)
  87 check_function_exists(__res_nclose HAVE___RES_NCLOSE)
  88 unset(CMAKE_REQUIRED_LIBRARIES)
  89
  90 set(CMAKE_REQUIRED_LIBRARIES ${RESOLV_LIRBRARY})
  91 check_function_exists(res_query HAVE_RES_QUERY)
  92 check_function_exists(__res_query HAVE___RES_QUERY)
  93 unset(CMAKE_REQUIRED_LIBRARIES)
  94
  95 set(CMAKE_REQUIRED_LIBRARIES ${RESOLV_LIRBRARY})
  96 check_function_exists(res_nquery HAVE_RES_NQUERY)
  97 check_function_exists(__res_nquery HAVE___RES_NQUERY)
  98 unset(CMAKE_REQUIRED_LIBRARIES)
  99
 100 set(CMAKE_REQUIRED_LIBRARIES ${RESOLV_LIRBRARY})
 101 check_function_exists(res_search HAVE_RES_SEARCH)
 102 check_function_exists(__res_search HAVE___RES_SEARCH)
 103 unset(CMAKE_REQUIRED_LIBRARIES)
 104
 105 set(CMAKE_REQUIRED_LIBRARIES ${RESOLV_LIRBRARY})
 106 check_function_exists(res_nsearch HAVE_RES_NSEARCH)
 107 check_function_exists(__res_nsearch HAVE___RES_NSEARCH)
 108 unset(CMAKE_REQUIRED_LIBRARIES)
 109
 110 check_symbol_exists(ns_name_compress "sys/types.h;arpa/nameser.h" HAVE_NS_NAME_COMPRESS)
 111
 112 if (UNIX)
 113     if (NOT LINUX)
 114         # libsocket (Solaris)
 115         find_library(SOCKET_LIBRARY socket)
 116         if (SOCKET_LIBRARY)
 117             check_library_exists(${SOCKET_LIBRARY} getaddrinfo "" HAVE_LIBSOCKET)
 118             if (HAVE_LIBSOCKET)
 119                 list(APPEND _REQUIRED_LIBRARIES ${SOCKET_LIBRARY})
 120             endif()
 121         endif()
 122
 123         # libnsl/inet_pton (Solaris)
 124         find_library(NSL_LIBRARY nsl)
 125         if (NSL_LIBRARY)
 126             check_library_exists(${NSL_LIBRARY} inet_pton "" HAVE_LIBNSL)
 127             if (HAVE_LIBNSL)
 128                 list(APPEND _REQUIRED_LIBRARIES ${NSL_LIBRARY})
 129             endif()
 130         endif()
 131     endif (NOT LINUX)
 132
 133     check_function_exists(getaddrinfo HAVE_GETADDRINFO)
 134 endif (UNIX)
 135
 136 find_library(DLFCN_LIBRARY dl)
 137 if (DLFCN_LIBRARY)
 138     list(APPEND _REQUIRED_LIBRARIES ${DLFCN_LIBRARY})
 139 else()
 140     check_function_exists(dlopen HAVE_DLOPEN)
 141     if (NOT HAVE_DLOPEN)
 142         message(FATAL_ERROR "FATAL: No dlopen() function detected")
 143     endif()
 144 endif()
 145
 146 # IPV6
 147 check_c_source_compiles("
 148     #include <stdlib.h>
 149     #include <sys/socket.h>
 150     #include <netdb.h>
 151     #include <netinet/in.h>
 152     #include <net/if.h>
 153
 154 int main(void) {
 155     struct sockaddr_storage sa_store;
 156     struct addrinfo *ai = NULL;
 157     struct in6_addr in6addr;
 158     int idx = if_nametoindex(\"iface1\");
 159     int s = socket(AF_INET6, SOCK_STREAM, 0);
 160     int ret = getaddrinfo(NULL, NULL, NULL, &ai);
 161     if (ret != 0) {
 162         const char *es = gai_strerror(ret);
 163     }
 164
 165     freeaddrinfo(ai);
 166     {
 167         int val = 1;
 168 #ifdef HAVE_LINUX_IPV6_V6ONLY_26
 169 #define IPV6_V6ONLY 26
 170 #endif
 171         ret = setsockopt(s, IPPROTO_IPV6, IPV6_V6ONLY,
 172                          (const void *)&val, sizeof(val));
 173     }
 174
 175     return 0;
 176 }" HAVE_IPV6)
 177
 178 check_struct_has_member("struct __res_state" _u._ext.nsaddrs resolv.h HAVE_RESOLV_IPV6_NSADDRS)
 179
 180 check_c_source_compiles("
 181 void log_fn(const char *format, ...) __attribute__ ((format (printf, 1, 2)));
 182
 183 int main(void) {
 184     return 0;
 185 }" HAVE_ATTRIBUTE_PRINTF_FORMAT)
 186
 187 check_c_source_compiles("
 188 void test_destructor_attribute(void) __attribute__ ((destructor));
 189
 190 void test_destructor_attribute(void)
 191 {
 192     return;
 193 }
 194
 195 int main(void) {
 196     return 0;
 197 }" HAVE_DESTRUCTOR_ATTRIBUTE)
 198
 199 # ENDIAN
 200 test_big_endian(WORDS_BIGENDIAN)
 201
 202 set(RWRAP_REQUIRED_LIBRARIES ${_REQUIRED_LIBRARIES} CACHE INTERNAL "resolv_wrapper required system libraries")