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#!/usr/bin/env python
import Logs, sys
def configure(conf):
# FIXME: if they don't have -Werror, these will all fail. But they
# probably will anyway...
conf.CHECK_CODE('int __attribute__((cold)) func(int x) { return x; }',
addmain=False, link=False, cflags="-Werror",
define='HAVE_ATTRIBUTE_COLD')
conf.CHECK_CODE('int __attribute__((const)) func(int x) { return x; }',
addmain=False, link=False, cflags="-Werror",
define='HAVE_ATTRIBUTE_CONST')
conf.CHECK_CODE('void __attribute__((noreturn)) func(int x) { exit(x); }',
addmain=False, link=False, cflags="-Werror",
define='HAVE_ATTRIBUTE_NORETURN')
conf.CHECK_CODE('void __attribute__((format(__printf__, 1, 2))) func(const char *fmt, ...) { }',
addmain=False, link=False, cflags="-Werror",
define='HAVE_ATTRIBUTE_PRINTF')
conf.CHECK_CODE('int __attribute__((unused)) func(int x) { return x; }',
addmain=False, link=False, cflags="-Werror",
define='HAVE_ATTRIBUTE_UNUSED')
conf.CHECK_CODE('int __attribute__((used)) func(int x) { return x; }',
addmain=False, link=False, cflags="-Werror",
define='HAVE_ATTRIBUTE_USED')
# We try to use headers for a compile-time test.
conf.CHECK_CODE(code = """#ifdef __BYTE_ORDER
#define B __BYTE_ORDER
#elif defined(BYTE_ORDER)
#define B BYTE_ORDER
#endif
#ifdef __LITTLE_ENDIAN
#define LITTLE __LITTLE_ENDIAN
#elif defined(LITTLE_ENDIAN)
#define LITTLE LITTLE_ENDIAN
#endif
#if !defined(LITTLE) || !defined(B) || LITTLE != B
#error Not little endian.
#endif""",
headers="endian.h sys/endian.h",
define="HAVE_LITTLE_ENDIAN")
conf.CHECK_CODE(code = """#ifdef __BYTE_ORDER
#define B __BYTE_ORDER
#elif defined(BYTE_ORDER)
#define B BYTE_ORDER
#endif
#ifdef __BIG_ENDIAN
#define BIG __BIG_ENDIAN
#elif defined(BIG_ENDIAN)
#define BIG BIG_ENDIAN
#endif
#if !defined(BIG) || !defined(B) || BIG != B
#error Not big endian.
#endif""",
headers="endian.h sys/endian.h",
define="HAVE_BIG_ENDIAN")
if not conf.CONFIG_SET("HAVE_BIG_ENDIAN") and not conf.CONFIG_SET("HAVE_LITTLE_ENDIAN"):
# That didn't work! Do runtime test.
conf.CHECK_CODE("""union { int i; char c[sizeof(int)]; } u;
u.i = 0x01020304;
return u.c[0] == 0x04 && u.c[1] == 0x03 && u.c[2] == 0x02 && u.c[3] == 0x01 ? 0 : 1;""",
addmain=True, execute=True,
define='HAVE_LITTLE_ENDIAN',
msg="Checking for HAVE_LITTLE_ENDIAN - runtime")
conf.CHECK_CODE("""union { int i; char c[sizeof(int)]; } u;
u.i = 0x01020304;
return u.c[0] == 0x01 && u.c[1] == 0x02 && u.c[2] == 0x03 && u.c[3] == 0x04 ? 0 : 1;""",
addmain=True, execute=True,
define='HAVE_BIG_ENDIAN',
msg="Checking for HAVE_BIG_ENDIAN - runtime")
# Extra sanity check.
if conf.CONFIG_SET("HAVE_BIG_ENDIAN") == conf.CONFIG_SET("HAVE_LITTLE_ENDIAN"):
Logs.error("Failed endian determination. The PDP-11 is back?")
sys.exit(1)
conf.CHECK_CODE('return __builtin_clz(1) == (sizeof(int)*8 - 1) ? 0 : 1;',
link=True,
define='HAVE_BUILTIN_CLZ')
conf.CHECK_CODE('return __builtin_clzl(1) == (sizeof(long)*8 - 1) ? 0 : 1;',
link=True,
define='HAVE_BUILTIN_CLZL')
conf.CHECK_CODE('return __builtin_clzll(1) == (sizeof(long long)*8 - 1) ? 0 : 1;',
link=True,
define='HAVE_BUILTIN_CLZLL')
conf.CHECK_CODE('return __builtin_constant_p(1) ? 0 : 1;',
link=True,
define='HAVE_BUILTIN_CONSTANT_P')
conf.CHECK_CODE('return __builtin_expect(main != 0, 1) ? 0 : 1;',
link=True,
define='HAVE_BUILTIN_EXPECT')
conf.CHECK_CODE('return __builtin_popcountl(255L) == 8 ? 0 : 1;',
link=True,
define='HAVE_BUILTIN_POPCOUNTL')
conf.CHECK_CODE('return __builtin_types_compatible_p(char *, int) ? 1 : 0;',
link=True,
define='HAVE_BUILTIN_TYPES_COMPATIBLE_P')
conf.CHECK_CODE('int *foo = (int[]) { 1, 2, 3, 4 }; return foo[0] ? 0 : 1;',
define='HAVE_COMPOUND_LITERALS')
conf.CHECK_CODE("""#include <ctype.h>
int main(void) { return isblank(' ') ? 0 : 1; }""",
link=True, addmain=False, add_headers=False,
define='HAVE_ISBLANK')
conf.CHECK_CODE('int x = 1; __typeof__(x) i; i = x; return i == x ? 0 : 1;',
link=True,
define='HAVE_TYPEOF')
conf.CHECK_CODE('int __attribute__((warn_unused_result)) func(int x) { return x; }',
addmain=False, link=False, cflags="-Werror",
define='HAVE_WARN_UNUSED_RESULT')
def build(bld):
bld.SAMBA_LIBRARY('ccan',
vnum="0.1-init-1161-g661d41f",
source=bld.path.ant_glob('*/*.c'),
private_library=True)
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