rwrap: Add .gitignore.
[obnox/cwrap/resolv_wrapper.git] / 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 ${APPLICATION_NAME})
11 set(VERSION ${APPLICATION_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 ${CMAKE_BINARY_DIR})
18 set(SOURCEDIR ${CMAKE_SOURCE_DIR})
19
20 function(COMPILER_DUMPVERSION _OUTPUT_VERSION)
21     # Remove whitespaces from the argument.
22     # This is needed for CC="ccache gcc" cmake ..
23     string(REPLACE " " "" _C_COMPILER_ARG "${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         set(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
53 # FUNCTIONS
54 check_library_exists(resolv res_send "" RES_SEND_IN_LIBRESOLV)
55 check_library_exists(resolv __res_send "" __RES_SEND_IN_LIBRESOLV)
56 if (RES_SEND_IN_LIBRESOLV OR __RES_SEND_IN_LIBRESOLV)
57     set(HAVE_LIBRESOLV TRUE)
58     set(CMAKE_REQUIRED_LIBRARIES resolv)
59 endif()
60
61 check_function_exists(res_init HAVE_RES_INIT)
62 check_function_exists(__res_init HAVE___RES_INIT)
63
64 check_function_exists(res_ninit HAVE_RES_NINIT)
65 check_function_exists(__res_ninit HAVE___RES_NINIT)
66
67 check_function_exists(res_close HAVE_RES_CLOSE)
68 check_function_exists(__res_close HAVE___RES_CLOSE)
69
70 check_function_exists(res_nclose HAVE_RES_NCLOSE)
71 check_function_exists(__res_nclose HAVE___RES_NCLOSE)
72
73 check_function_exists(res_query HAVE_RES_QUERY)
74 check_function_exists(__res_query HAVE___RES_QUERY)
75
76 check_function_exists(res_nquery HAVE_RES_NQUERY)
77 check_function_exists(__res_nquery HAVE___RES_NQUERY)
78
79 check_function_exists(res_search HAVE_RES_SEARCH)
80 check_function_exists(__res_search HAVE___RES_SEARCH)
81
82 check_function_exists(res_nsearch HAVE_RES_NSEARCH)
83 check_function_exists(__res_nsearch HAVE___RES_NSEARCH)
84
85 set(CMAKE_REQUIRED_LIBRARIES)
86
87 check_library_exists(dl dlopen "" HAVE_LIBDL)
88 if (HAVE_LIBDL)
89     find_library(DLFCN_LIBRARY dl)
90     set(CMAKE_REQUIRED_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES} ${DLFCN_LIBRARY})
91 endif (HAVE_LIBDL)
92
93 # IPV6
94 check_c_source_compiles("
95     #include <stdlib.h>
96     #include <sys/socket.h>
97     #include <netdb.h>
98     #include <netinet/in.h>
99     #include <net/if.h>
100
101 int main(void) {
102     struct sockaddr_storage sa_store;
103     struct addrinfo *ai = NULL;
104     struct in6_addr in6addr;
105     int idx = if_nametoindex(\"iface1\");
106     int s = socket(AF_INET6, SOCK_STREAM, 0);
107     int ret = getaddrinfo(NULL, NULL, NULL, &ai);
108     if (ret != 0) {
109         const char *es = gai_strerror(ret);
110     }
111
112     freeaddrinfo(ai);
113     {
114         int val = 1;
115 #ifdef HAVE_LINUX_IPV6_V6ONLY_26
116 #define IPV6_V6ONLY 26
117 #endif
118         ret = setsockopt(s, IPPROTO_IPV6, IPV6_V6ONLY,
119                          (const void *)&val, sizeof(val));
120     }
121
122     return 0;
123 }" HAVE_IPV6)
124
125 check_c_source_compiles("
126 void log_fn(const char *format, ...) __attribute__ ((format (printf, 1, 2)));
127
128 int main(void) {
129     return 0;
130 }" HAVE_ATTRIBUTE_PRINTF_FORMAT)
131
132 check_c_source_compiles("
133 void test_destructor_attribute(void) __attribute__ ((destructor));
134
135 void test_destructor_attribute(void)
136 {
137     return;
138 }
139
140 int main(void) {
141     return 0;
142 }" HAVE_DESTRUCTOR_ATTRIBUTE)
143
144 # ENDIAN
145 test_big_endian(WORDS_BIGENDIAN)
146
147 set(RWRAP_REQUIRED_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES} CACHE INTERNAL "resolv_wrapper required system libraries")