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
  13 set(BINARYDIR ${uid_wrapper_BINARY_DIR})
  14 set(SOURCEDIR ${uid_wrapper_SOURCE_DIR})
  15
  16 function(COMPILER_DUMPVERSION _OUTPUT_VERSION)
  17     # Remove whitespaces from the argument.
  18     # This is needed for CC="ccache gcc" cmake ..
  19     string(REPLACE " " "" _C_COMPILER_ARG "${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         set(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/types.h HAVE_SYS_TYPES_H)
  47 check_include_file(sys/syscall.h HAVE_SYS_SYSCALL_H)
  48 check_include_file(syscall.h HAVE_SYSCALL_H)
  49 check_include_file(grp.h HAVE_GRP_H)
  50 check_include_file(unistd.h HAVE_UNISTD_H)
  51
  52 # FUNCTIONS
  53 check_function_exists(strncpy HAVE_STRNCPY)
  54 check_function_exists(vsnprintf HAVE_VSNPRINTF)
  55 check_function_exists(snprintf HAVE_SNPRINTF)
  56
  57 check_function_exists(seteuid HAVE_SETEUID)
  58 check_function_exists(setreuid HAVE_SETREUID)
  59 check_function_exists(setresuid HAVE_SETRESUID)
  60 check_function_exists(getresuid HAVE_GETRESUID)
  61 check_function_exists(getresgid HAVE_GETRESGID)
  62
  63 check_function_exists(setegid HAVE_SETEGID)
  64 check_function_exists(setregid HAVE_SETREGID)
  65 check_function_exists(setresgid HAVE_SETRESGID)
  66
  67 check_function_exists(getgroups HAVE_GETGROUPS)
  68 check_function_exists(__getgroups_chk HAVE___GETGROUPS_CHK)
  69 check_function_exists(setgroups HAVE_SETGROUPS)
  70
  71 if (HAVE_SETGROUPS)
  72     check_prototype_definition(setgroups
  73         "int setgroups(int size, const gid_t *list)"
  74         "-1"
  75         "unistd.h"
  76         HAVE_SETGROUPS_INT)
  77 endif (HAVE_SETGROUPS)
  78
  79 check_function_exists(syscall HAVE_SYSCALL)
  80
  81 if (HAVE_SYSCALL)
  82     set(CMAKE_REQUIRED_DEFINITIONS -D_GNU_SOURCE)
  83
  84     check_prototype_definition(syscall
  85         "int syscall(int sysno, ...)"
  86         "-1"
  87         "unistd.h;sys/syscall.h"
  88         HAVE_SYSCALL_INT)
  89     set(CMAKE_REQUIRED_DEFINITIONS)
  90 endif (HAVE_SYSCALL)
  91
  92 # OPTIONS
  93
  94 if (LINUX)
  95     if (HAVE_SYS_SYSCALL_H)
  96        list(APPEND CMAKE_REQUIRED_DEFINITIONS "-DHAVE_SYS_SYSCALL_H")
  97     endif (HAVE_SYS_SYSCALL_H)
  98     if (HAVE_SYSCALL_H)
  99         list(APPEND CMAKE_REQUIRED_DEFINITIONS "-DHAVE_SYSCALL_H")
 100     endif (HAVE_SYSCALL_H)
 101
 102 check_c_source_compiles("
 103 #include <sys/types.h>
 104 #ifdef HAVE_SYS_SYSCALL_H
 105 #include <sys/syscall.h>
 106 #endif
 107 #ifdef HAVE_SYSCALL_H
 108 #include <syscall.h>
 109 #endif
 110 #include <unistd.h>
 111
 112 int main(void) {
 113     syscall(SYS_setresuid32, -1, -1, -1);
 114     syscall(SYS_setresgid32, -1, -1, -1);
 115     syscall(SYS_setreuid32, -1, -1);
 116     syscall(SYS_setregid32, -1, -1);
 117     syscall(SYS_setuid32, -1);
 118     syscall(SYS_setgid32, -1);
 119     syscall(SYS_setgroups32, 0, NULL);
 120
 121     return 0;
 122 }" HAVE_LINUX_32BIT_SYSCALLS)
 123
 124     set(CMAKE_REQUIRED_DEFINITIONS)
 125 endif (LINUX)
 126
 127 check_c_source_compiles("
 128 #include <stdbool.h>
 129 int main(void) {
 130     bool x;
 131     bool *p_x = &x;
 132     __atomic_load(p_x, &x, __ATOMIC_RELAXED);
 133     return 0;
 134 }" HAVE_GCC_ATOMIC_BUILTINS)
 135
 136 check_c_source_compiles("
 137 __thread int tls;
 138
 139 int main(void) {
 140     return 0;
 141 }" HAVE_GCC_THREAD_LOCAL_STORAGE)
 142
 143 check_c_source_compiles("
 144 void test_constructor_attribute(void) __attribute__ ((constructor));
 145
 146 void test_constructor_attribute(void)
 147 {
 148      return;
 149 }
 150
 151 int main(void) {
 152      return 0;
 153 }" HAVE_CONSTRUCTOR_ATTRIBUTE)
 154
 155 check_c_source_compiles("
 156 void test_destructor_attribute(void) __attribute__ ((destructor));
 157
 158 void test_destructor_attribute(void)
 159 {
 160     return;
 161 }
 162
 163 int main(void) {
 164     return 0;
 165 }" HAVE_DESTRUCTOR_ATTRIBUTE)
 166
 167 check_c_source_compiles("
 168 #pragma init (test_constructor)
 169 void test_constructor(void);
 170
 171 void test_constructor(void)
 172 {
 173      return;
 174 }
 175
 176 int main(void) {
 177      return 0;
 178 }" HAVE_PRAGMA_INIT)
 179
 180 check_c_source_compiles("
 181 #pragma fini (test_destructor)
 182 void test_destructor(void);
 183
 184 void test_destructor(void)
 185 {
 186     return;
 187 }
 188
 189 int main(void) {
 190     return 0;
 191 }" HAVE_PRAGMA_FINI)
 192
 193 # If this produces a warning treat it as error!
 194 set(CMAKE_REQUIRED_FLAGS "-Werror")
 195 check_c_source_compiles("
 196 void test_address_sanitizer_attribute(void) __attribute__((no_sanitize_address));
 197
 198 void test_address_sanitizer_attribute(void)
 199 {
 200     return;
 201 }
 202
 203 int main(void) {
 204     return 0;
 205 }" HAVE_ADDRESS_SANITIZER_ATTRIBUTE)
 206 set(CMAKE_REQUIRED_FLAGS)
 207
 208 check_c_source_compiles("
 209 void log_fn(const char *format, ...) __attribute__ ((format (printf, 1, 2)));
 210
 211 int main(void) {
 212     return 0;
 213 }" HAVE_FUNCTION_ATTRIBUTE_FORMAT)
 214
 215 check_c_source_compiles("
 216 #define FALL_THROUGH __attribute__((fallthrough))
 217
 218 enum direction_e {
 219     UP = 0,
 220     DOWN,
 221 };
 222
 223 int main(void) {
 224     enum direction_e key = UP;
 225     int i = 10;
 226     int j = 0;
 227
 228     switch (key) {
 229     case UP:
 230         i = 5;
 231         FALL_THROUGH;
 232     case DOWN:
 233         j = i * 2;
 234         break;
 235     default:
 236         break;
 237     }
 238
 239     return 0;
 240 }" HAVE_FALLTHROUGH_ATTRIBUTE)
 241
 242 # SYSTEM LIBRARIES
 243
 244 find_library(DLFCN_LIBRARY dl)
 245 if (DLFCN_LIBRARY)
 246     list(APPEND _REQUIRED_LIBRARIES ${DLFCN_LIBRARY})
 247 else()
 248     check_function_exists(dlopen HAVE_DLOPEN)
 249     if (NOT HAVE_DLOPEN)
 250         message(FATAL_ERROR "FATAL: No dlopen() function detected")
 251     endif()
 252 endif()
 253
 254 if (OSX)
 255     set(HAVE_APPLE 1)
 256 endif (OSX)
 257
 258 # ENDIAN
 259 if (NOT WIN32)
 260     test_big_endian(WORDS_BIGENDIAN)
 261 endif (NOT WIN32)
 262
 263 set(UIDWRAP_REQUIRED_LIBRARIES ${_REQUIRED_LIBRARIES} CACHE INTERNAL "uidwrap required system libraries")