path: root/lib/replace/wscript

#!/usr/bin/env python

APPNAME = 'libreplace'
VERSION = '1.2.1'

blddir = 'bin'

import sys, os, Utils

# find the buildtools directory
srcdir = '.'
while not os.path.exists(srcdir+'/buildtools') and len(srcdir.split('/')) < 5:
    srcdir = '../' + srcdir
sys.path.insert(0, srcdir + '/buildtools/wafsamba')

import wafsamba, samba_dist
import Options, os, preproc

samba_dist.DIST_DIRS('lib/replace buildtools:buildtools')

def set_options(opt):
    opt.BUILTIN_DEFAULT('NONE')
    opt.PRIVATE_EXTENSION_DEFAULT('')
    opt.RECURSE('buildtools/wafsamba')

@wafsamba.runonce
def configure(conf):
    conf.RECURSE('buildtools/wafsamba')

    conf.env.standalone_replace = conf.IN_LAUNCH_DIR()

    conf.DEFINE('HAVE_LIBREPLACE', 1)
    conf.DEFINE('LIBREPLACE_NETWORK_CHECKS', 1)

    # on Tru64 certain features are only available with _OSF_SOURCE set to 1
    # and _XOPEN_SOURCE set to 600
    if conf.env['SYSTEM_UNAME_SYSNAME'] == 'OSF1':
        conf.DEFINE('_OSF_SOURCE', 1, add_to_cflags=True)
        conf.DEFINE('_XOPEN_SOURCE', 600, add_to_cflags=True)

    conf.CHECK_HEADERS('linux/types.h crypt.h locale.h acl/libacl.h compat.h')
    conf.CHECK_HEADERS('acl/libacl.h attr/xattr.h compat.h ctype.h dustat.h')
    conf.CHECK_HEADERS('fcntl.h fnmatch.h glob.h history.h krb5.h langinfo.h')
    conf.CHECK_HEADERS('libaio.h locale.h ndir.h pwd.h')
    conf.CHECK_HEADERS('shadow.h sys/acl.h')
    conf.CHECK_HEADERS('sys/attributes.h sys/capability.h sys/dir.h sys/epoll.h')
    conf.CHECK_HEADERS('sys/fcntl.h sys/filio.h sys/filsys.h sys/fs/s5param.h sys/fs/vx/quota.h')
    conf.CHECK_HEADERS('sys/id.h sys/ioctl.h sys/ipc.h sys/mman.h sys/mode.h sys/ndir.h sys/priv.h')
    conf.CHECK_HEADERS('sys/resource.h sys/security.h sys/shm.h sys/statfs.h sys/statvfs.h sys/termio.h')
    conf.CHECK_HEADERS('sys/vfs.h sys/xattr.h termio.h termios.h sys/file.h')
    conf.CHECK_HEADERS('sys/wait.h sys/stat.h malloc.h grp.h')
    conf.CHECK_HEADERS('sys/select.h setjmp.h utime.h sys/syslog.h syslog.h')
    conf.CHECK_HEADERS('stdarg.h vararg.h sys/mount.h mntent.h')
    conf.CHECK_HEADERS('stropts.h unix.h string.h strings.h sys/param.h limits.h')
    conf.CHECK_HEADERS('''sys/socket.h netinet/in.h netdb.h arpa/inet.h netinet/in_systm.h
                          netinet/ip.h netinet/tcp.h netinet/in_ip.h
                          sys/sockio.h sys/un.h''', together=True)
    conf.CHECK_HEADERS('sys/uio.h ifaddrs.h direct.h dirent.h')
    conf.CHECK_HEADERS('windows.h winsock2.h ws2tcpip.h')
    conf.CHECK_HEADERS('libintl.h errno.h')
    conf.CHECK_HEADERS('gcrypt.h getopt.h iconv.h')
    conf.CHECK_HEADERS('sys/inotify.h memory.h nss.h sasl/sasl.h')
    conf.CHECK_HEADERS('security/pam_appl.h sys/inotify.h zlib.h asm/unistd.h')
    conf.CHECK_HEADERS('aio.h sys/unistd.h rpc/rpc.h rpc/nettype.h alloca.h float.h')

    conf.CHECK_HEADERS('rpcsvc/nis.h rpcsvc/ypclnt.h sys/prctl.h sys/sysctl.h')
    conf.CHECK_HEADERS('sys/fileio.h sys/filesys.h sys/dustat.h sys/sysmacros.h')
    conf.CHECK_HEADERS('xfs/libxfs.h netgroup.h rpcsvc/yp_prot.h')
    conf.CHECK_HEADERS('valgrind.h valgrind/valgrind.h valgrind/memcheck.h')
    conf.CHECK_HEADERS('nss_common.h nsswitch.h ns_api.h')
    conf.CHECK_HEADERS('sys/extattr.h sys/ea.h sys/proplist.h sys/cdefs.h')
    conf.CHECK_HEADERS('utmp.h utmpx.h lastlog.h malloc.h')
    conf.CHECK_HEADERS('syscall.h sys/syscall.h inttypes.h')

    conf.CHECK_TYPES('"long long" intptr_t uintptr_t ptrdiff_t comparison_fn_t')
    conf.CHECK_TYPE('_Bool', define='HAVE__Bool')
    conf.CHECK_TYPE('bool', define='HAVE_BOOL')

    conf.CHECK_TYPE('int8_t', 'char')
    conf.CHECK_TYPE('uint8_t', 'unsigned char')
    conf.CHECK_TYPE('int16_t', 'short')
    conf.CHECK_TYPE('uint16_t', 'unsigned short')
    conf.CHECK_TYPE('int32_t', 'int')
    conf.CHECK_TYPE('uint32_t', 'unsigned')
    conf.CHECK_TYPE('int64_t', 'long long')
    conf.CHECK_TYPE('uint64_t', 'unsigned long long')
    conf.CHECK_TYPE('size_t', 'unsigned int')
    conf.CHECK_TYPE('ssize_t', 'int')
    conf.CHECK_TYPE('ino_t', 'unsigned')
    conf.CHECK_TYPE('loff_t', 'off_t')
    conf.CHECK_TYPE('offset_t', 'loff_t')
    conf.CHECK_TYPE('volatile int', define='HAVE_VOLATILE')
    conf.CHECK_TYPE('uint_t', 'unsigned int')
    conf.CHECK_TYPE('blksize_t', 'long', headers='sys/types.h sys/stat.h unistd.h')
    conf.CHECK_TYPE('blkcnt_t', 'long', headers='sys/types.h sys/stat.h unistd.h')

    conf.CHECK_SIZEOF('bool char int "long long" long short size_t ssize_t')
    conf.CHECK_SIZEOF('int8_t uint8_t int16_t uint16_t int32_t uint32_t int64_t uint64_t')
    conf.CHECK_SIZEOF('void*', define='SIZEOF_VOID_P')
    conf.CHECK_SIZEOF('off_t dev_t ino_t time_t')

    conf.CHECK_TYPES('socklen_t', headers='sys/socket.h')
    conf.CHECK_TYPE_IN('struct ifaddrs', 'ifaddrs.h')
    conf.CHECK_TYPE_IN('struct addrinfo', 'netdb.h')
    conf.CHECK_TYPE_IN('struct sockaddr', 'sys/socket.h')
    conf.CHECK_CODE('struct sockaddr_in6 x', define='HAVE_STRUCT_SOCKADDR_IN6',
                    headers='sys/socket.h netdb.h netinet/in.h')
    conf.CHECK_TYPE_IN('struct sockaddr_storage', 'sys/socket.h')
    conf.CHECK_TYPE_IN('sa_family_t', 'sys/socket.h')

    conf.CHECK_TYPE_IN('sig_atomic_t', 'signal.h', define='HAVE_SIG_ATOMIC_T_TYPE')

    conf.CHECK_FUNCS_IN('''inet_ntoa inet_aton inet_ntop inet_pton connect gethostbyname
                           getaddrinfo getnameinfo freeaddrinfo gai_strerror socketpair''',
                        'socket nsl', checklibc=True,
                        headers='sys/socket.h netinet/in.h arpa/inet.h netdb.h')

    # Some old Linux systems have broken header files and
    # miss the IPV6_V6ONLY define in netinet/in.h,
    # but have it in linux/in6.h.
    # We can't include both files so we just check if the value
    # if defined and do the replacement in system/network.h
    if not conf.CHECK_VARIABLE('IPV6_V6ONLY',
                               headers='sys/socket.h netdb.h netinet/in.h'):
        conf.CHECK_CODE('''
                        #include <linux/in6.h>
                        #if (IPV6_V6ONLY != 26)
                        #error no IPV6_V6ONLY support on linux
                        #endif
                        int main(void) { return IPV6_V6ONLY; }
                        ''',
                        define='HAVE_LINUX_IPV6_V6ONLY_26',
                        addmain=False,
                        msg='Checking for IPV6_V6ONLY in linux/in6.h',
                        local_include=False)

    conf.CHECK_CODE('''
                       struct sockaddr_storage sa_store;
                       struct addrinfo *ai = NULL;
                       struct in6_addr in6addr;
                       int idx = if_nametoindex("iface1");
                       int s = socket(AF_INET6, SOCK_STREAM, 0);
                       int ret = getaddrinfo(NULL, NULL, NULL, &ai);
                       if (ret != 0) {
                           const char *es = gai_strerror(ret);
                       }
                       freeaddrinfo(ai);
                       {
                          int val = 1;
                          #ifdef HAVE_LINUX_IPV6_V6ONLY_26
                          #define IPV6_V6ONLY 26
                          #endif
                          ret = setsockopt(s, IPPROTO_IPV6, IPV6_V6ONLY,
                                           (const void *)&val, sizeof(val));
                       }
                       ''',
                    define='HAVE_IPV6',
                    lib='nsl socket',
                    headers='sys/socket.h netdb.h netinet/in.h')

    # these may be builtins, so we need the link=False strategy
    conf.CHECK_FUNCS('strdup memmem printf memset memcpy memmove strcpy strncpy bzero', link=False)

    conf.CHECK_FUNCS('shl_load shl_unload shl_findsym')
    conf.CHECK_FUNCS('pipe strftime srandom random srand rand usleep setbuffer')
    conf.CHECK_FUNCS('lstat getpgrp utime utimes seteuid setreuid setresuid setegid')
    conf.CHECK_FUNCS('setregid setresgid chroot strerror vsyslog setlinebuf mktime')
    conf.CHECK_FUNCS('ftruncate chsize rename waitpid wait4')
    conf.CHECK_FUNCS('initgroups pread pwrite strndup strcasestr')
    conf.CHECK_FUNCS('strtok_r mkdtemp dup2 dprintf vdprintf isatty chown lchown')
    conf.CHECK_FUNCS('link readlink symlink realpath snprintf vsnprintf')
    conf.CHECK_FUNCS('asprintf vasprintf setenv unsetenv strnlen strtoull __strtoull')
    conf.CHECK_FUNCS('strtouq strtoll __strtoll strtoq memalign posix_memalign')

    # libbsd on some platforms provides strlcpy and strlcat
    if not conf.CHECK_FUNCS('strlcpy strlcat'):
        conf.CHECK_FUNCS_IN('strlcpy strlcat', 'bsd', headers='bsd/string.h',
                checklibc=True)
    if not conf.CHECK_FUNCS('getpeereid'):
        conf.CHECK_FUNCS_IN('getpeereid', 'bsd', headers='sys/types.h bsd/unistd.h')

    conf.CHECK_CODE('''
                struct ucred cred;
                socklen_t cred_len;
                int ret = getsockopt(0, SOL_SOCKET, SO_PEERCRED, &cred, &cred_len);''',
                'HAVE_PEERCRED',
                msg="Checking whether we can use SO_PEERCRED to get socket credentials",
                headers='sys/types.h sys/socket.h')

    #Some OS (ie. freebsd) return EINVAL if the convertion could not be done, it's not what we expect
    #Let's detect those cases
    if conf.CONFIG_SET('HAVE_STRTOLL'):
        conf.CHECK_CODE('''
                        long long nb = strtoll("Text", NULL, 0);
                        if (errno == EINVAL) {
                            return 0;
                        } else {
                            return 1;
                        }
                        ''',
                        msg="Checking correct behavior of strtoll",
                        headers = 'errno.h',
                        execute = True,
                        define_ret = True,
                        define = 'HAVE_BSD_STRTOLL',
                        )
    conf.CHECK_FUNCS('if_nametoindex strerror_r')
    conf.CHECK_FUNCS('getdirentries getdents syslog')
    conf.CHECK_FUNCS('gai_strerror get_current_dir_name')
    conf.CHECK_FUNCS('timegm getifaddrs freeifaddrs mmap setgroups setsid')
    conf.CHECK_FUNCS('getgrent_r getgrgid_r getgrnam_r getgrouplist getpagesize')
    conf.CHECK_FUNCS('getpwent_r getpwnam_r getpwuid_r epoll_create')

    conf.SET_TARGET_TYPE('attr', 'EMPTY')

    xattr_headers='sys/attributes.h attr/xattr.h sys/xattr.h'

    conf.CHECK_FUNCS_IN('''
fgetxattr flistea flistxattr
fremovexattr fsetxattr getxattr
listxattr removexattr setxattr
''', 'attr', checklibc=True, headers=xattr_headers)

    # We need to check for linux xattrs first, as we do not wish to link to -lattr
    # (the XFS compat API) on Linux systems with the native xattr API
    if not conf.CONFIG_SET('HAVE_GETXATTR'):
        conf.CHECK_FUNCS_IN('''
attr_get attr_getf attr_list attr_listf attropen attr_remove
attr_removef attr_set attr_setf extattr_delete_fd extattr_delete_file
extattr_get_fd extattr_get_file extattr_list_fd extattr_list_file
extattr_set_fd extattr_set_file fgetea flistea
fremoveea fsetea getea listea
removeea setea
''', 'attr', checklibc=True, headers=xattr_headers)

    if (conf.CONFIG_SET('HAVE_ATTR_LISTF') or
        conf.CONFIG_SET('HAVE_EXTATTR_LIST_FD') or
        conf.CONFIG_SET('HAVE_FLISTEA') or
        conf.CONFIG_SET('HAVE_FLISTXATTR')):
            conf.DEFINE('HAVE_XATTR_SUPPORT', 1)

    # Darwin has extra options to xattr-family functions
    conf.CHECK_CODE('getxattr(NULL, NULL, NULL, 0, 0, 0)',
                    headers=xattr_headers, local_include=False,
                    define='XATTR_ADDITIONAL_OPTIONS',
                    msg="Checking whether xattr interface takes additional options")

    conf.CHECK_FUNCS_IN('dlopen dlsym dlerror dlclose', 'dl',
                        checklibc=True, headers='dlfcn.h dl.h')

    conf.CHECK_C_PROTOTYPE('dlopen', 'void *dlopen(const char* filename, unsigned int flags)',
                           define='DLOPEN_TAKES_UNSIGNED_FLAGS', headers='dlfcn.h dl.h')

    if conf.CHECK_FUNCS_IN('fdatasync', 'rt', checklibc=True):
        # some systems are missing the declaration
        conf.CHECK_DECLS('fdatasync')

    if conf.CHECK_FUNCS_IN('clock_gettime', 'rt', checklibc=True):
        for c in ['CLOCK_MONOTONIC', 'CLOCK_PROCESS_CPUTIME_ID', 'CLOCK_REALTIME']:
            conf.CHECK_CODE('''
                #if TIME_WITH_SYS_TIME
                # include <sys/time.h>
                # include <time.h>
                #else
                # if HAVE_SYS_TIME_H
                #  include <sys/time.h>
                # else
                #  include <time.h>
                # endif
                #endif
                clockid_t clk = %s''' % c,
                'HAVE_%s' % c,
                msg='Checking whether the clock_gettime clock ID %s is available' % c)

    conf.CHECK_TYPE('struct timespec', headers='sys/time.h time.h')

    # these headers need to be tested as a group on freebsd
    conf.CHECK_HEADERS(headers='sys/socket.h net/if.h', together=True)
    conf.CHECK_HEADERS(headers='netinet/in.h arpa/nameser.h resolv.h', together=True)
    conf.CHECK_FUNCS_IN('res_search', 'resolv', checklibc=True,
                        headers='netinet/in.h arpa/nameser.h resolv.h')


    if not conf.CHECK_FUNCS_IN('gettext', 'intl', checklibc=True, headers='libintl.h'):
    # Some hosts need lib iconv for linking with lib intl
    # So we try with flags just in case it helps.
        oldflags = conf.env['LDFLAGS_INTL']
        conf.env['LDFLAGS_INTL'] = "-liconv"
        if not conf.CHECK_LIB('intl'):
            conf.env['LDFLAGS_INTL'] = oldflags
        else:
            conf.CHECK_FUNCS_IN('gettext', 'intl', checklibc=True, headers='libintl.h')

    conf.CHECK_FUNCS_IN('dgettext gettext', 'intl', headers='libintl.h')
    conf.CHECK_FUNCS_IN('pthread_create', 'pthread', checklibc=True, headers='pthread.h')

    conf.CHECK_FUNCS_IN('crypt', 'crypt', checklibc=True)

    conf.CHECK_VARIABLE('rl_event_hook', define='HAVE_DECL_RL_EVENT_HOOK', always=True,
                        headers='readline.h readline/readline.h readline/history.h')

    conf.CHECK_DECLS('snprintf vsnprintf asprintf vasprintf')

    conf.CHECK_DECLS('errno', headers='errno.h', reverse=True)
    conf.CHECK_DECLS('environ getgrent_r getpwent_r', reverse=True, headers='pwd.h grp.h')
    conf.CHECK_DECLS('pread pwrite setenv setresgid setresuid', reverse=True)

    if conf.CONFIG_SET('HAVE_EPOLL_CREATE') and conf.CONFIG_SET('HAVE_SYS_EPOLL_H'):
        conf.DEFINE('HAVE_EPOLL', 1)

    conf.CHECK_HEADERS('poll.h')
    conf.CHECK_FUNCS('poll')

    if not conf.CHECK_CODE('''#define LIBREPLACE_CONFIGURE_TEST_STRPTIME
                           #include "test/strptime.c"''',
                           define='HAVE_STRPTIME',
                           addmain=False,
                           msg='Checking for working strptime'):
        conf.DEFINE('REPLACE_STRPTIME', 1)

    conf.CHECK_CODE('gettimeofday(NULL, NULL)', 'HAVE_GETTIMEOFDAY_TZ', execute=False)

    conf.CHECK_CODE('#include "test/snprintf.c"',
                    define="HAVE_C99_VSNPRINTF",
                    execute=True,
                    addmain=False,
                    msg="Checking for C99 vsnprintf")

    conf.CHECK_CODE('#include "test/shared_mmap.c"',
                    addmain=False, add_headers=False, execute=True,
                    define='HAVE_SHARED_MMAP',
                    msg="Checking for HAVE_SHARED_MMAP")

    conf.CHECK_CODE('#include "test/shared_mremap.c"',
                    addmain=False, add_headers=False, execute=True,
                    define='HAVE_MREMAP',
                    msg="Checking for HAVE_MREMAP")

    # OpenBSD (and I've heard HPUX) doesn't sync between mmap and write.
    # FIXME: Anything other than a 0 or 1 exit code should abort configure!
    conf.CHECK_CODE('#include "test/incoherent_mmap.c"',
                    addmain=False, add_headers=False, execute=True,
                    define='HAVE_INCOHERENT_MMAP',
                    msg="Checking for HAVE_INCOHERENT_MMAP")

    conf.SAMBA_BUILD_ENV()

    conf.CHECK_CODE('''
                    typedef struct {unsigned x;} FOOBAR;
                    #define X_FOOBAR(x) ((FOOBAR) { x })
                    #define FOO_ONE X_FOOBAR(1)
                    FOOBAR f = FOO_ONE;
                    static const struct {
                        FOOBAR y;
                    } f2[] = {
                        {FOO_ONE}
                    };
                    static const FOOBAR f3[] = {FOO_ONE};
                    ''',
                    define='HAVE_IMMEDIATE_STRUCTURES')

    conf.CHECK_CODE('mkdir("foo",0777)', define='HAVE_MKDIR_MODE', headers='sys/stat.h')

    conf.CHECK_STRUCTURE_MEMBER('struct stat', 'st_mtim.tv_nsec', define='HAVE_STAT_TV_NSEC',
                                headers='sys/stat.h')
    # we need the st_rdev test under two names
    conf.CHECK_STRUCTURE_MEMBER('struct stat', 'st_rdev',
                                define='HAVE_STRUCT_STAT_ST_RDEV',
                                headers='sys/stat.h')
    conf.CHECK_STRUCTURE_MEMBER('struct stat', 'st_rdev', define='HAVE_ST_RDEV',
                                headers='sys/stat.h')
    conf.CHECK_STRUCTURE_MEMBER('struct sockaddr_storage', 'ss_family',
                                headers='sys/socket.h netinet/in.h')
    conf.CHECK_STRUCTURE_MEMBER('struct sockaddr_storage', '__ss_family',
                                headers='sys/socket.h netinet/in.h')


    if conf.CHECK_STRUCTURE_MEMBER('struct sockaddr', 'sa_len',
                                   headers='sys/socket.h netinet/in.h',
                                   define='HAVE_SOCKADDR_SA_LEN'):
        # the old build system produced both defines
        conf.DEFINE('HAVE_STRUCT_SOCKADDR_SA_LEN', 1)

    conf.CHECK_STRUCTURE_MEMBER('struct sockaddr_in', 'sin_len',
                                headers='sys/socket.h netinet/in.h',
                                define='HAVE_SOCK_SIN_LEN')

    conf.CHECK_CODE('struct sockaddr_un sunaddr; sunaddr.sun_family = AF_UNIX;',
                    define='HAVE_UNIXSOCKET', headers='sys/socket.h sys/un.h')


    conf.CHECK_CODE('''
                    struct stat st;
                    char tpl[20]="/tmp/test.XXXXXX";
                    int fd = mkstemp(tpl);
                    if (fd == -1) exit(1);
                    unlink(tpl);
                    if (fstat(fd, &st) != 0) exit(1);
                    if ((st.st_mode & 0777) != 0600) exit(1);
                    exit(0);
                    ''',
                    define='HAVE_SECURE_MKSTEMP',
                    execute=True,
                    mandatory=True) # lets see if we get a mandatory failure for this one

    if conf.CHECK_CFLAGS('-fvisibility=hidden'):
        conf.env.VISIBILITY_CFLAGS = '-fvisibility=hidden'
        conf.CHECK_CODE('''void vis_foo1(void) {}
                           __attribute__((visibility("default"))) void vis_foo2(void) {}''',
                        cflags=conf.env.VISIBILITY_CFLAGS,
                        define='HAVE_VISIBILITY_ATTR')

    # look for a method of finding the list of network interfaces
    for method in ['HAVE_IFACE_GETIFADDRS', 'HAVE_IFACE_AIX', 'HAVE_IFACE_IFCONF', 'HAVE_IFACE_IFREQ']:
        if conf.CHECK_CODE('''
                           #define %s 1
                           #define NO_CONFIG_H 1
                           #define AUTOCONF_TEST 1
                           #define SOCKET_WRAPPER_NOT_REPLACE
                           #include "replace.c"
                           #include "inet_ntop.c"
                           #include "snprintf.c"
                           #include "getifaddrs.c"
                           #define getifaddrs_test main
                           #include "test/getifaddrs.c"
                           ''' % method,
                           method,
                           lib='nsl socket',
                           addmain=False,
                           execute=True):
            break

    if conf.CHECK_FUNCS('getpass getpassphrase'):
        # if we have both, then we prefer getpassphrase
        conf.DEFINE('REPLACE_GETPASS_BY_GETPASSPHRASE', 1)
        conf.DEFINE('REPLACE_GETPASS', 1)
    else:
        conf.CHECK_CODE('''#include "getpass.c"
                       int main(void) { return 0; }''',
                    addmain=False,
                    define='REPLACE_GETPASS',
                    cflags='-DNO_CONFIG_H')

    conf.RECURSE('system')
    conf.SAMBA_CONFIG_H()


REPLACEMENT_FUNCTIONS = {
    'replace.c': ['ftruncate', 'strlcpy', 'strlcat', 'mktime', 'initgroups',
                  'memmove', 'strdup', 'setlinebuf', 'vsyslog', 'strnlen',
                  'strndup', 'waitpid', 'seteuid', 'setegid', 'chroot',
                  'mkstemp', 'mkdtemp', 'pread', 'pwrite', 'strcasestr',
                  'strtok_r', 'strtoll', 'strtoull', 'setenv', 'unsetenv',
                  'utime', 'utimes', 'dup2', 'chown', 'link', 'readlink',
                  'symlink', 'lchown', 'realpath', 'memmem', 'vdprintf',
                  'dprintf', 'get_current_dir_name',
                  'strerror_r', 'clock_gettime'],
    'timegm.c': ['timegm'],
    # Note: C99_VSNPRINTF is not a function, but a special condition
    # for replacement
    'snprintf.c': ['C99_VSNPRINTF', 'snprintf', 'vsnprintf', 'asprintf', 'vasprintf'],
    }


def build(bld):
    bld.RECURSE('buildtools/wafsamba')

    REPLACE_HOSTCC_SOURCE = ''

    if bld.CONFIG_SET('REPLACE_STRPTIME'):       REPLACE_HOSTCC_SOURCE += ' strptime.c'
    for filename, functions in REPLACEMENT_FUNCTIONS.iteritems():
        for function in functions:
            if not bld.CONFIG_SET('HAVE_%s' % function.upper()):
                REPLACE_HOSTCC_SOURCE += ' %s' % filename
                break

    extra_libs = ''
    if bld.CONFIG_SET('HAVE_LIBBSD'): extra_libs += ' bsd'

    bld.SAMBA_SUBSYSTEM('LIBREPLACE_HOSTCC',
        REPLACE_HOSTCC_SOURCE,
        use_hostcc=True,
        use_global_deps=False,
        cflags='-DSOCKET_WRAPPER_DISABLE=1 -DNSS_WRAPPER_DISABLE=1 -DUID_WRAPPER_DISABLE=1 -D_SAMBA_HOSTCC_',
        group='compiler_libraries',
        deps = extra_libs
    )

    REPLACE_SOURCE = REPLACE_HOSTCC_SOURCE

    if bld.CONFIG_SET('REPLACE_GETPASS'):        REPLACE_SOURCE += ' getpass.c'
    if not bld.CONFIG_SET('HAVE_CRYPT'):         REPLACE_SOURCE += ' crypt.c'
    if not bld.CONFIG_SET('HAVE_DLOPEN'):        REPLACE_SOURCE += ' dlfcn.c'
    if not bld.CONFIG_SET('HAVE_POLL'):          REPLACE_SOURCE += ' poll.c'

    if not bld.CONFIG_SET('HAVE_SOCKETPAIR'):    REPLACE_SOURCE += ' socketpair.c'
    if not bld.CONFIG_SET('HAVE_CONNECT'):       REPLACE_SOURCE += ' socket.c'
    if not bld.CONFIG_SET('HAVE_GETIFADDRS'):    REPLACE_SOURCE += ' getifaddrs.c'
    if not bld.CONFIG_SET('HAVE_GETADDRINFO'):   REPLACE_SOURCE += ' getaddrinfo.c'
    if not bld.CONFIG_SET('HAVE_INET_NTOA'):     REPLACE_SOURCE += ' inet_ntoa.c'
    if not bld.CONFIG_SET('HAVE_INET_ATON'):     REPLACE_SOURCE += ' inet_aton.c'
    if not bld.CONFIG_SET('HAVE_INET_NTOP'):     REPLACE_SOURCE += ' inet_ntop.c'
    if not bld.CONFIG_SET('HAVE_INET_PTON'):     REPLACE_SOURCE += ' inet_pton.c'
    if not bld.CONFIG_SET('HAVE_GETXATTR') or bld.CONFIG_SET('XATTR_ADDITIONAL_OPTIONS'):
                                                 REPLACE_SOURCE += ' xattr.c'

    bld.SAMBA_LIBRARY('replace',
                      source=REPLACE_SOURCE,
                      group='base_libraries',
                      # FIXME: Ideally symbols should be hidden here so they 
                      # don't appear in the global namespace when Samba 
                      # libraries are loaded, but this doesn't appear to work 
                      # at the moment:
                      # hide_symbols=bld.BUILTIN_LIBRARY('replace'),
                      private_library=True,
                      deps='crypt dl nsl socket rt attr' + extra_libs)

    bld.SAMBA_SUBSYSTEM('replace-test',
                      source='''test/testsuite.c test/strptime.c
                      test/os2_delete.c test/getifaddrs.c''',
                      deps='replace')

    if bld.env.standalone_replace:
        bld.SAMBA_BINARY('replace_testsuite',
                         source='test/main.c',
                         deps='replace replace-test',
                         install=False)

    # build replacements for stdint.h and stdbool.h if needed
    bld.SAMBA_GENERATOR('replace_stdint_h',
                        rule='cp ${SRC} ${TGT}',
                        source='hdr_replace.h',
                        target='stdint.h',
                        enabled = not bld.CONFIG_SET('HAVE_STDINT_H'))
    bld.SAMBA_GENERATOR('replace_stdbool_h',
                        rule='cp ${SRC} ${TGT}',
                        source='hdr_replace.h',
                        target='stdbool.h',
                        enabled = not bld.CONFIG_SET('HAVE_STDBOOL_H'))

def dist():
    '''makes a tarball for distribution'''
    samba_dist.dist()