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include(CheckCCompilerFlag)
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include(CheckCSourceCompiles)
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include(CheckIncludeFile)
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include(CheckIncludeFiles)
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include(CheckSymbolExists)
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include(TestBigEndian)
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check_include_file("dlfcn.h" HAVE_DLFCN_H)
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check_include_file("fcntl.h" HAVE_FCNTL_H)
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check_include_file("inttypes.h" HAVE_INTTYPES_H)
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check_include_file("memory.h" HAVE_MEMORY_H)
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check_include_file("stdint.h" HAVE_STDINT_H)
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check_include_file("stdlib.h" HAVE_STDLIB_H)
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check_include_file("strings.h" HAVE_STRINGS_H)
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check_include_file("string.h" HAVE_STRING_H)
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check_include_file("sys/stat.h" HAVE_SYS_STAT_H)
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check_include_file("sys/types.h" HAVE_SYS_TYPES_H)
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check_include_file("unistd.h" HAVE_UNISTD_H)
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check_symbol_exists("getpagesize" "unistd.h" HAVE_GETPAGESIZE)
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check_symbol_exists("mmap" "sys/mman.h" HAVE_MMAP)
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check_symbol_exists("getrandom" "sys/random.h" HAVE_GETRANDOM)
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if(EXPAT_WITH_LIBBSD)
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set(CMAKE_REQUIRED_LIBRARIES "${LIB_BSD}")
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set(_bsd "bsd/")
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else()
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set(_bsd "")
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endif()
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check_symbol_exists("arc4random_buf" "${_bsd}stdlib.h" HAVE_ARC4RANDOM_BUF)
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if(NOT HAVE_ARC4RANDOM_BUF)
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check_symbol_exists("arc4random" "${_bsd}stdlib.h" HAVE_ARC4RANDOM)
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endif()
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set(CMAKE_REQUIRED_LIBRARIES)
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#/* Define to 1 if you have the ANSI C header files. */
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check_include_files("stdlib.h;stdarg.h;string.h;float.h" STDC_HEADERS)
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test_big_endian(WORDS_BIGENDIAN)
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#/* 1234 = LIL_ENDIAN, 4321 = BIGENDIAN */
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if(WORDS_BIGENDIAN)
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set(BYTEORDER 4321)
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else(WORDS_BIGENDIAN)
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set(BYTEORDER 1234)
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endif(WORDS_BIGENDIAN)
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if(HAVE_SYS_TYPES_H)
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check_symbol_exists("off_t" "sys/types.h" OFF_T)
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check_symbol_exists("size_t" "sys/types.h" SIZE_T)
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else(HAVE_SYS_TYPES_H)
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set(OFF_T "long")
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set(SIZE_T "unsigned")
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endif(HAVE_SYS_TYPES_H)
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check_c_source_compiles("
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#include <stdlib.h> /* for NULL */
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#include <unistd.h> /* for syscall */
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#include <sys/syscall.h> /* for SYS_getrandom */
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int main() {
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syscall(SYS_getrandom, NULL, 0, 0);
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return 0;
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}"
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HAVE_SYSCALL_GETRANDOM)
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check_c_compiler_flag("-fno-strict-aliasing" FLAG_NO_STRICT_ALIASING)
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check_c_compiler_flag("-fvisibility=hidden" FLAG_VISIBILITY)
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