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