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include(CheckTypeSize)
include(CheckSymbolExists)
include(CheckFunctionExists)
include(CheckIncludeFiles)
include(CheckCSourceRuns)
include(CheckCSourceCompiles)
include(TestBigEndian)
check_c_source_compiles("
#include <execinfo.h>
int main(void)
{
void *trace[1];
backtrace(trace, 1);
return 0;
}
" HAVE_EXECINFO_BACKTRACE)
check_c_source_compiles("
int main(void)
{
int a = 42;
__builtin_add_overflow(a, a, &a);
__builtin_sub_overflow(a, a, &a);
return 0;
}
" HAVE_BUILTIN_ADD_OVERFLOW)
check_type_size("int" SIZEOF_INT LANGUAGE C)
check_type_size("long" SIZEOF_LONG LANGUAGE C)
check_type_size("intmax_t" SIZEOF_INTMAX_T LANGUAGE C)
check_type_size("size_t" SIZEOF_SIZE_T LANGUAGE C)
check_type_size("void *" SIZEOF_VOID_PTR LANGUAGE C)
check_symbol_exists(_NSGetEnviron crt_externs.h HAVE__NSGETENVIRON)
# Headers
check_include_files(langinfo.h HAVE_LANGINFO_H)
check_include_files(strings.h HAVE_STRINGS_H)
check_include_files(sys/utsname.h HAVE_SYS_UTSNAME_H)
check_include_files(termios.h HAVE_TERMIOS_H)
check_include_files(sys/uio.h HAVE_SYS_UIO_H)
check_include_files(sys/sdt.h HAVE_SYS_SDT_H)
if(CMAKE_SYSTEM_NAME STREQUAL "Linux")
check_include_files(sys/xattr.h HAVE_XATTR)
endif()
# Functions
check_function_exists(fseeko HAVE_FSEEKO)
check_function_exists(readv HAVE_READV)
check_function_exists(readlink HAVE_READLINK)
check_function_exists(strnlen HAVE_STRNLEN)
check_function_exists(strcasecmp HAVE_STRCASECMP)
check_function_exists(strncasecmp HAVE_STRNCASECMP)
check_function_exists(strptime HAVE_STRPTIME)
check_c_source_compiles("
#include <sys/types.h>
#include <dirent.h>
#include <sys/file.h>
int main(void)
{
DIR *dir = opendir(\"dirname\");
dirfd(dir);
flock(10, LOCK_SH);
return 0;
}
" HAVE_DIRFD_AND_FLOCK)
check_c_source_compiles("
#include <pwd.h>
int main(void)
{
getpwent();
getpwuid(0);
getpwnam(\"root\");
return 0;
}
" HAVE_PWD_FUNCS)
if(CMAKE_SYSTEM_NAME STREQUAL "SunOS")
check_c_source_compiles("
#include <termios.h>
int
main(void)
{
return forkpty(0, NULL, NULL, NULL);
}
" HAVE_FORKPTY)
else()
set(HAVE_FORKPTY 1)
endif()
# Symbols
check_symbol_exists(FD_CLOEXEC "fcntl.h" HAVE_FD_CLOEXEC)
if(HAVE_LANGINFO_H)
check_symbol_exists(CODESET "langinfo.h" HAVE_NL_LANGINFO_CODESET)
endif()
check_include_files("endian.h" HAVE_ENDIAN_H)
set(ENDIAN_INCLUDE_FILE "endian.h")
if(NOT HAVE_ENDIAN_H)
check_include_files("sys/endian.h" HAVE_SYS_ENDIAN_H)
if (HAVE_SYS_ENDIAN_H)
set(ENDIAN_INCLUDE_FILE "sys/endian.h")
endif()
endif()
set(SI "#include <stdint.h>\n")
set(MS "int main(int argc,char**argv)\n{\n uint64_t i=0x0102030405060708ULL;")
set(ME "}")
check_c_source_compiles("
#define _BSD_SOURCE 1
#define _DEFAULT_SOURCE 1
${SI}
#include <${ENDIAN_INCLUDE_FILE}>
#ifndef be64toh
# error No be64toh macros
#endif
${MS}
uint64_t j = be64toh(i);
return (j == 0); // j must not be zero
${ME}"
HAVE_BE64TOH_MACROS)
if(NOT "${HAVE_BE64TOH_MACROS}")
check_function_exists(be64toh HAVE_BE64TOH_FUNC)
endif()
if("${HAVE_BE64TOH_MACROS}" OR "${HAVE_BE64TOH_FUNC}")
set(HAVE_BE64TOH 1)
endif()
test_big_endian(ORDER_BIG_ENDIAN)
configure_file (
"${PROJECT_SOURCE_DIR}/cmake.config/config.h.in"
"${PROJECT_BINARY_DIR}/cmake.config/auto/config.h"
)
# Prevent double space in --version output if CMAKE_C_FLAGS is empty
set(C_FLAGS_VERSION_OUTPUT ${CMAKE_C_FLAGS})
if(C_FLAGS_VERSION_OUTPUT)
string(PREPEND C_FLAGS_VERSION_OUTPUT " ")
endif()
if(${CMAKE_VERSION} VERSION_GREATER_EQUAL 3.15)
configure_file(versiondef.h.in auto/versiondef.h.gen)
else()
configure_file(versiondef_old.h.in auto/versiondef.h.gen)
endif()
file(GENERATE
OUTPUT "${PROJECT_BINARY_DIR}/cmake.config/auto/versiondef-$<CONFIG>.h"
INPUT "${PROJECT_BINARY_DIR}/cmake.config/auto/versiondef.h.gen")
configure_file (
"${PROJECT_SOURCE_DIR}/cmake.config/pathdef.c.in"
"${PROJECT_BINARY_DIR}/cmake.config/auto/pathdef.c"
ESCAPE_QUOTES)
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