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35a2d020a0
From: Andrew Bartlett <abartlet@samba.org> This code is incredibly useful, but is only needed in test code and may not be perfectly portable. It has compiled on all systems bar Solaris so far, but rather than make it a requirement to build Samba, just keep it for development. Andrew Bartlett Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Autobuild-User(master): Rusty Russell <rusty@rustcorp.com.au> Autobuild-Date(master): Thu Jun 7 18:53:12 CEST 2012 on sn-devel-104
139 lines
6.6 KiB
Python
139 lines
6.6 KiB
Python
#!/usr/bin/env python
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import Logs, sys, Options
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def configure(conf):
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conf.DEFINE('HAVE_CCAN', 1)
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# FIXME: if they don't have -Werror, these will all fail. But they
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# probably will anyway...
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conf.CHECK_CODE('int __attribute__((cold)) func(int x) { return x; }',
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addmain=False, link=False, cflags="-Werror",
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define='HAVE_ATTRIBUTE_COLD')
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conf.CHECK_CODE('int __attribute__((const)) func(int x) { return x; }',
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addmain=False, link=False, cflags="-Werror",
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define='HAVE_ATTRIBUTE_CONST')
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conf.CHECK_CODE('void __attribute__((noreturn)) func(int x) { exit(x); }',
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addmain=False, link=False, cflags="-Werror",
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define='HAVE_ATTRIBUTE_NORETURN')
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conf.CHECK_CODE('void __attribute__((format(__printf__, 1, 2))) func(const char *fmt, ...) { }',
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addmain=False, link=False, cflags="-Werror",
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define='HAVE_ATTRIBUTE_PRINTF')
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conf.CHECK_CODE('int __attribute__((unused)) func(int x) { return x; }',
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addmain=False, link=False, cflags="-Werror",
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define='HAVE_ATTRIBUTE_UNUSED')
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conf.CHECK_CODE('int __attribute__((used)) func(int x) { return x; }',
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addmain=False, link=False, cflags="-Werror",
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define='HAVE_ATTRIBUTE_USED')
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# We try to use headers for a compile-time test.
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conf.CHECK_CODE(code = """#ifdef __BYTE_ORDER
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#define B __BYTE_ORDER
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#elif defined(BYTE_ORDER)
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#define B BYTE_ORDER
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#endif
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#ifdef __LITTLE_ENDIAN
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#define LITTLE __LITTLE_ENDIAN
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#elif defined(LITTLE_ENDIAN)
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#define LITTLE LITTLE_ENDIAN
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#endif
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#if !defined(LITTLE) || !defined(B) || LITTLE != B
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#error Not little endian.
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#endif""",
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headers="endian.h sys/endian.h",
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define="HAVE_LITTLE_ENDIAN")
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conf.CHECK_CODE(code = """#ifdef __BYTE_ORDER
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#define B __BYTE_ORDER
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#elif defined(BYTE_ORDER)
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#define B BYTE_ORDER
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#endif
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#ifdef __BIG_ENDIAN
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#define BIG __BIG_ENDIAN
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#elif defined(BIG_ENDIAN)
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#define BIG BIG_ENDIAN
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#endif
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#if !defined(BIG) || !defined(B) || BIG != B
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#error Not big endian.
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#endif""",
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headers="endian.h sys/endian.h",
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define="HAVE_BIG_ENDIAN")
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if not conf.CONFIG_SET("HAVE_BIG_ENDIAN") and not conf.CONFIG_SET("HAVE_LITTLE_ENDIAN"):
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# That didn't work! Do runtime test.
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conf.CHECK_CODE("""union { int i; char c[sizeof(int)]; } u;
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u.i = 0x01020304;
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return u.c[0] == 0x04 && u.c[1] == 0x03 && u.c[2] == 0x02 && u.c[3] == 0x01 ? 0 : 1;""",
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addmain=True, execute=True,
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define='HAVE_LITTLE_ENDIAN',
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msg="Checking for HAVE_LITTLE_ENDIAN - runtime")
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conf.CHECK_CODE("""union { int i; char c[sizeof(int)]; } u;
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u.i = 0x01020304;
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return u.c[0] == 0x01 && u.c[1] == 0x02 && u.c[2] == 0x03 && u.c[3] == 0x04 ? 0 : 1;""",
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addmain=True, execute=True,
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define='HAVE_BIG_ENDIAN',
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msg="Checking for HAVE_BIG_ENDIAN - runtime")
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# Extra sanity check.
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if conf.CONFIG_SET("HAVE_BIG_ENDIAN") == conf.CONFIG_SET("HAVE_LITTLE_ENDIAN"):
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Logs.error("Failed endian determination. The PDP-11 is back?")
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sys.exit(1)
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conf.CHECK_CODE('return __builtin_choose_expr(1, 0, "garbage");',
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link=True,
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define='HAVE_BUILTIN_CHOOSE_EXPR')
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conf.CHECK_CODE('return __builtin_clz(1) == (sizeof(int)*8 - 1) ? 0 : 1;',
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link=True,
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define='HAVE_BUILTIN_CLZ')
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conf.CHECK_CODE('return __builtin_clzl(1) == (sizeof(long)*8 - 1) ? 0 : 1;',
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link=True,
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define='HAVE_BUILTIN_CLZL')
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conf.CHECK_CODE('return __builtin_clzll(1) == (sizeof(long long)*8 - 1) ? 0 : 1;',
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link=True,
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define='HAVE_BUILTIN_CLZLL')
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conf.CHECK_CODE('return __builtin_constant_p(1) ? 0 : 1;',
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link=True,
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define='HAVE_BUILTIN_CONSTANT_P')
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conf.CHECK_CODE('return __builtin_expect(main != 0, 1) ? 0 : 1;',
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link=True,
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define='HAVE_BUILTIN_EXPECT')
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conf.CHECK_CODE('return __builtin_popcountl(255L) == 8 ? 0 : 1;',
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link=True,
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define='HAVE_BUILTIN_POPCOUNTL')
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conf.CHECK_CODE('return __builtin_types_compatible_p(char *, int) ? 1 : 0;',
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link=True,
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define='HAVE_BUILTIN_TYPES_COMPATIBLE_P')
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conf.CHECK_CODE('int *foo = (int[]) { 1, 2, 3, 4 }; return foo[0] ? 0 : 1;',
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define='HAVE_COMPOUND_LITERALS')
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conf.CHECK_CODE("""#include <ctype.h>
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int main(void) { return isblank(' ') ? 0 : 1; }""",
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link=True, addmain=False, add_headers=False,
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define='HAVE_ISBLANK')
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conf.CHECK_CODE('int x = 1; __typeof__(x) i; i = x; return i == x ? 0 : 1;',
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link=True,
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define='HAVE_TYPEOF')
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conf.CHECK_CODE('int __attribute__((warn_unused_result)) func(int x) { return x; }',
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addmain=False, link=False, cflags="-Werror",
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define='HAVE_WARN_UNUSED_RESULT')
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# backtrace could be in libexecinfo or in libc
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conf.CHECK_FUNCS_IN('backtrace backtrace_symbols', 'execinfo', checklibc=True, headers='execinfo.h')
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def build(bld):
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for ccan_dir in ["hash", "htable", "ilog", "likely", "list", "read_write_all", "str", "tally", "time"]:
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bld.SAMBA_SUBSYSTEM('ccan-%s' % ccan_dir,
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source=bld.path.ant_glob('%s/*.c' % ccan_dir))
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if bld.env.DEVELOPER_MODE:
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bld.SAMBA_LIBRARY('ccan-failtest',
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source=bld.path.ant_glob('failtest/*.c'),
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deps='execinfo ccan ccan-failtest ccan-htable ccan-list ccan-read_write_all ccan-time',
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private_library=True)
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bld.SAMBA_LIBRARY('ccan',
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source='',
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deps='ccan-hash ccan-ilog ccan-likely ccan-tally',
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private_library=True)
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