xref: /aosp_15_r20/external/expat/expat/ConfigureChecks.cmake (revision 6be67779651aebaf20f11e5663acd1ae59e93f66) 
1include(CheckCCompilerFlag)
2include(CheckCSourceCompiles)
3include(CheckIncludeFile)
4include(CheckIncludeFiles)
5include(CheckLibraryExists)
6include(CheckSymbolExists)
7include(TestBigEndian)
8
9check_include_file("dlfcn.h" HAVE_DLFCN_H)
10check_include_file("fcntl.h" HAVE_FCNTL_H)
11check_include_file("inttypes.h" HAVE_INTTYPES_H)
12check_include_file("memory.h" HAVE_MEMORY_H)
13check_include_file("stdint.h" HAVE_STDINT_H)
14check_include_file("stdlib.h" HAVE_STDLIB_H)
15check_include_file("strings.h" HAVE_STRINGS_H)
16check_include_file("string.h" HAVE_STRING_H)
17check_include_file("sys/stat.h" HAVE_SYS_STAT_H)
18check_include_file("sys/types.h" HAVE_SYS_TYPES_H)
19check_include_file("unistd.h" HAVE_UNISTD_H)
20
21check_symbol_exists("getpagesize" "unistd.h" HAVE_GETPAGESIZE)
22check_symbol_exists("mmap" "sys/mman.h" HAVE_MMAP)
23check_symbol_exists("getrandom" "sys/random.h" HAVE_GETRANDOM)
24
25if(EXPAT_WITH_LIBBSD)
26    set(CMAKE_REQUIRED_LIBRARIES "${LIB_BSD}")
27    set(_bsd "bsd/")
28else()
29    set(_bsd "")
30endif()
31check_symbol_exists("arc4random_buf" "${_bsd}stdlib.h" HAVE_ARC4RANDOM_BUF)
32if(NOT HAVE_ARC4RANDOM_BUF)
33    check_symbol_exists("arc4random" "${_bsd}stdlib.h" HAVE_ARC4RANDOM)
34endif()
35set(CMAKE_REQUIRED_LIBRARIES)
36
37#/* Define to 1 if you have the ANSI C header files. */
38check_include_files("stdlib.h;stdarg.h;string.h;float.h" STDC_HEADERS)
39
40test_big_endian(WORDS_BIGENDIAN)
41#/* 1234 = LIL_ENDIAN, 4321 = BIGENDIAN */
42if(WORDS_BIGENDIAN)
43    set(BYTEORDER 4321)
44else(WORDS_BIGENDIAN)
45    set(BYTEORDER 1234)
46endif(WORDS_BIGENDIAN)
47
48if(HAVE_SYS_TYPES_H)
49    check_c_source_compiles("
50        #include <sys/types.h>
51        int main(void) {
52            const off_t offset = -123;
53            return 0;
54        }"
55        HAVE_OFF_T)
56endif()
57
58if(NOT HAVE_OFF_T)
59    set(off_t "long")
60endif()
61
62check_c_source_compiles("
63        #define _GNU_SOURCE
64        #include <stdlib.h>  /* for NULL */
65        #include <unistd.h>  /* for syscall */
66        #include <sys/syscall.h>  /* for SYS_getrandom */
67        int main(void) {
68            syscall(SYS_getrandom, NULL, 0, 0);
69            return 0;
70        }"
71    HAVE_SYSCALL_GETRANDOM)
72
73check_c_compiler_flag("-fno-strict-aliasing" FLAG_NO_STRICT_ALIASING)
74check_c_compiler_flag("-fvisibility=hidden" FLAG_VISIBILITY)
75
76check_library_exists(m cos "" _EXPAT_LIBM_FOUND)
77