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(setgroups HAVE_SETGROUPS)
  69
  70 if (HAVE_SETGROUPS)
  71     check_prototype_definition(setgroups
  72         "int setgroups(int size, const gid_t *list)"
  73         "-1"
  74         "unistd.h"
  75         HAVE_SETGROUPS_INT)
  76 endif (HAVE_SETGROUPS)
  77
  78 check_function_exists(syscall HAVE_SYSCALL)
  79
  80 if (HAVE_SYSCALL)
  81     set(CMAKE_REQUIRED_DEFINITIONS -D_GNU_SOURCE)
  82
  83     check_prototype_definition(syscall
  84         "int syscall(int sysno, ...)"
  85         "-1"
  86         "unistd.h;sys/syscall.h"
  87         HAVE_SYSCALL_INT)
  88     set(CMAKE_REQUIRED_DEFINITIONS)
  89 endif (HAVE_SYSCALL)
  90
  91 # OPTIONS
  92
  93 if (LINUX)
  94     if (HAVE_SYS_SYSCALL_H)
  95        list(APPEND CMAKE_REQUIRED_DEFINITIONS "-DHAVE_SYS_SYSCALL_H")
  96     endif (HAVE_SYS_SYSCALL_H)
  97     if (HAVE_SYSCALL_H)
  98         list(APPEND CMAKE_REQUIRED_DEFINITIONS "-DHAVE_SYSCALL_H")
  99     endif (HAVE_SYSCALL_H)
 100
 101 check_c_source_compiles("
 102 #include <sys/types.h>
 103 #ifdef HAVE_SYS_SYSCALL_H
 104 #include <sys/syscall.h>
 105 #endif
 106 #ifdef HAVE_SYSCALL_H
 107 #include <syscall.h>
 108 #endif
 109 #include <unistd.h>
 110
 111 int main(void) {
 112     syscall(SYS_setresuid32, -1, -1, -1);
 113     syscall(SYS_setresgid32, -1, -1, -1);
 114     syscall(SYS_setreuid32, -1, -1);
 115     syscall(SYS_setregid32, -1, -1);
 116     syscall(SYS_setuid32, -1);
 117     syscall(SYS_setgid32, -1);
 118     syscall(SYS_setgroups32, 0, NULL);
 119
 120     return 0;
 121 }" HAVE_LINUX_32BIT_SYSCALLS)
 122
 123     set(CMAKE_REQUIRED_DEFINITIONS)
 124 endif (LINUX)
 125
 126 check_c_source_compiles("
 127 #include <stdbool.h>
 128 int main(void) {
 129     bool x;
 130     bool *p_x = &x;
 131     __atomic_load(p_x, &x, __ATOMIC_RELAXED);
 132     return 0;
 133 }" HAVE_GCC_ATOMIC_BUILTINS)
 134
 135 check_c_source_compiles("
 136 __thread int tls;
 137
 138 int main(void) {
 139     return 0;
 140 }" HAVE_GCC_THREAD_LOCAL_STORAGE)
 141
 142 check_c_source_compiles("
 143 void test_constructor_attribute(void) __attribute__ ((constructor));
 144
 145 void test_constructor_attribute(void)
 146 {
 147      return;
 148 }
 149
 150 int main(void) {
 151      return 0;
 152 }" HAVE_CONSTRUCTOR_ATTRIBUTE)
 153
 154 check_c_source_compiles("
 155 void test_destructor_attribute(void) __attribute__ ((destructor));
 156
 157 void test_destructor_attribute(void)
 158 {
 159     return;
 160 }
 161
 162 int main(void) {
 163     return 0;
 164 }" HAVE_DESTRUCTOR_ATTRIBUTE)
 165
 166 # If this produces a warning treat it as error!
 167 set(CMAKE_REQUIRED_FLAGS "-Werror")
 168 check_c_source_compiles("
 169 void test_address_sanitizer_attribute(void) __attribute__((no_sanitize_address));
 170
 171 void test_address_sanitizer_attribute(void)
 172 {
 173     return;
 174 }
 175
 176 int main(void) {
 177     return 0;
 178 }" HAVE_ADDRESS_SANITIZER_ATTRIBUTE)
 179 set(CMAKE_REQUIRED_FLAGS)
 180
 181 check_c_source_compiles("
 182 void log_fn(const char *format, ...) __attribute__ ((format (printf, 1, 2)));
 183
 184 int main(void) {
 185     return 0;
 186 }" HAVE_FUNCTION_ATTRIBUTE_FORMAT)
 187
 188 check_c_source_compiles("
 189 #define FALL_THROUGH __attribute__((fallthrough))
 190
 191 enum direction_e {
 192     UP = 0,
 193     DOWN,
 194 };
 195
 196 int main(void) {
 197     enum direction_e key = UP;
 198     int i = 10;
 199     int j = 0;
 200
 201     switch (key) {
 202     case UP:
 203         i = 5;
 204         FALL_THROUGH;
 205     case DOWN:
 206         j = i * 2;
 207         break;
 208     default:
 209         break;
 210     }
 211
 212     return 0;
 213 }" HAVE_FALLTHROUGH_ATTRIBUTE)
 214
 215 # SYSTEM LIBRARIES
 216
 217 find_library(DLFCN_LIBRARY dl)
 218 if (DLFCN_LIBRARY)
 219     list(APPEND _REQUIRED_LIBRARIES ${DLFCN_LIBRARY})
 220 else()
 221     check_function_exists(dlopen HAVE_DLOPEN)
 222     if (NOT HAVE_DLOPEN)
 223         message(FATAL_ERROR "FATAL: No dlopen() function detected")
 224     endif()
 225 endif()
 226
 227 if (OSX)
 228     set(HAVE_APPLE 1)
 229 endif (OSX)
 230
 231 # ENDIAN
 232 if (NOT WIN32)
 233     test_big_endian(WORDS_BIGENDIAN)
 234 endif (NOT WIN32)
 235
 236 set(UIDWRAP_REQUIRED_LIBRARIES ${_REQUIRED_LIBRARIES} CACHE INTERNAL "uidwrap required system libraries")