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      1 include(CheckCCompilerFlag)
      2 include(CheckCSourceCompiles)
      3 include(CheckIncludeFile)
      4 include(CheckIncludeFiles)
      5 include(CheckFunctionExists)
      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_function_exists("getpagesize" HAVE_GETPAGESIZE)
     22 check_function_exists("bcopy" HAVE_BCOPY)
     23 check_symbol_exists("memmove" "string.h" HAVE_MEMMOVE)
     24 check_function_exists("mmap" HAVE_MMAP)
     25 check_function_exists("getrandom" HAVE_GETRANDOM)
     26 
     27 if(USE_libbsd)
     28     set(CMAKE_REQUIRED_LIBRARIES "${LIB_BSD}")
     29 endif()
     30 check_function_exists("arc4random_buf" HAVE_ARC4RANDOM_BUF)
     31 if(NOT HAVE_ARC4RANDOM_BUF)
     32     check_function_exists("arc4random" HAVE_ARC4RANDOM)
     33 endif()
     34 set(CMAKE_REQUIRED_LIBRARIES)
     35 
     36 #/* Define to 1 if you have the ANSI C header files. */
     37 check_include_files("stdlib.h;stdarg.h;string.h;float.h" STDC_HEADERS)
     38 
     39 test_big_endian(WORDS_BIGENDIAN)
     40 #/* 1234 = LIL_ENDIAN, 4321 = BIGENDIAN */
     41 if(WORDS_BIGENDIAN)
     42     set(BYTEORDER 4321)
     43 else(WORDS_BIGENDIAN)
     44     set(BYTEORDER 1234)
     45 endif(WORDS_BIGENDIAN)
     46 
     47 if(HAVE_SYS_TYPES_H)
     48     check_symbol_exists("off_t" "sys/types.h" OFF_T)
     49     check_symbol_exists("size_t" "sys/types.h" SIZE_T)
     50 else(HAVE_SYS_TYPES_H)
     51     set(OFF_T "long")
     52     set(SIZE_T "unsigned")
     53 endif(HAVE_SYS_TYPES_H)
     54 
     55 check_c_source_compiles("
     56         #include <stdlib.h>  /* for NULL */
     57         #include <unistd.h>  /* for syscall */
     58         #include <sys/syscall.h>  /* for SYS_getrandom */
     59         int main() {
     60             syscall(SYS_getrandom, NULL, 0, 0);
     61             return 0;
     62         }"
     63     HAVE_SYSCALL_GETRANDOM)
     64 
     65 configure_file(expat_config.h.cmake "${CMAKE_CURRENT_BINARY_DIR}/expat_config.h")
     66 add_definitions(-DHAVE_EXPAT_CONFIG_H)
     67 
     68 check_c_compiler_flag("-fno-strict-aliasing" FLAG_NO_STRICT_ALIASING)
     69