ConfigureChecks.cmake

   1 include(CheckCCompilerFlag)
   2 include(CheckCSourceCompiles)
   3 include(CheckIncludeFile)
   4 include(CheckIncludeFiles)
   5 include(CheckLibraryExists)
   6 include(CheckSymbolExists)
   7 include(TestBigEndian)
   8
   9 check_include_file("dlfcn.h" HAVE_DLFCN_H)
  10 check_include_file("fcntl.h" HAVE_FCNTL_H)
  11 check_include_file("inttypes.h" HAVE_INTTYPES_H)
  12 check_include_file("memory.h" HAVE_MEMORY_H)
  13 check_include_file("stdint.h" HAVE_STDINT_H)
  14 check_include_file("stdlib.h" HAVE_STDLIB_H)
  15 check_include_file("strings.h" HAVE_STRINGS_H)
  16 check_include_file("string.h" HAVE_STRING_H)
  17 check_include_file("sys/stat.h" HAVE_SYS_STAT_H)
  18 check_include_file("sys/types.h" HAVE_SYS_TYPES_H)
  19 check_include_file("unistd.h" HAVE_UNISTD_H)
  20
  21 check_symbol_exists("getpagesize" "unistd.h" HAVE_GETPAGESIZE)
  22 check_symbol_exists("mmap" "sys/mman.h" HAVE_MMAP)
  23 check_symbol_exists("getrandom" "sys/random.h" HAVE_GETRANDOM)
  24
  25 if(EXPAT_WITH_LIBBSD)
  26     set(CMAKE_REQUIRED_LIBRARIES "${LIB_BSD}")
  27     set(_bsd "bsd/")
  28 else()
  29     set(_bsd "")
  30 endif()
  31 check_symbol_exists("arc4random_buf" "${_bsd}stdlib.h" HAVE_ARC4RANDOM_BUF)
  32 if(NOT HAVE_ARC4RANDOM_BUF)
  33     check_symbol_exists("arc4random" "${_bsd}stdlib.h" HAVE_ARC4RANDOM)
  34 endif()
  35 set(CMAKE_REQUIRED_LIBRARIES)
  36
  37 #/* Define to 1 if you have the ANSI C header files. */
  38 check_include_files("stdlib.h;stdarg.h;string.h;float.h" STDC_HEADERS)
  39
  40 test_big_endian(WORDS_BIGENDIAN)
  41 #/* 1234 = LIL_ENDIAN, 4321 = BIGENDIAN */
  42 if(WORDS_BIGENDIAN)
  43     set(BYTEORDER 4321)
  44 else(WORDS_BIGENDIAN)
  45     set(BYTEORDER 1234)
  46 endif(WORDS_BIGENDIAN)
  47
  48 if(HAVE_SYS_TYPES_H)
  49     check_symbol_exists("off_t" "sys/types.h" OFF_T)
  50     check_symbol_exists("size_t" "sys/types.h" SIZE_T)
  51 else(HAVE_SYS_TYPES_H)
  52     set(OFF_T "long")
  53     set(SIZE_T "unsigned")
  54 endif(HAVE_SYS_TYPES_H)
  55
  56 check_c_source_compiles("
  57         #include <stdlib.h>  /* for NULL */
  58         #include <unistd.h>  /* for syscall */
  59         #include <sys/syscall.h>  /* for SYS_getrandom */
  60         int main() {
  61             syscall(SYS_getrandom, NULL, 0, 0);
  62             return 0;
  63         }"
  64     HAVE_SYSCALL_GETRANDOM)
  65
  66 check_c_compiler_flag("-fno-strict-aliasing" FLAG_NO_STRICT_ALIASING)
  67 check_c_compiler_flag("-fvisibility=hidden" FLAG_VISIBILITY)
  68
  69 check_library_exists(m cos "" _EXPAT_LIBM_FOUND)