Tweaked some comments.

[rsync/rsync.git] / configure.in

dnl Process this file with autoconf to produce a configure script.

AC_INIT()
AC_CONFIG_SRCDIR([byteorder.h])
AC_CONFIG_HEADER(config.h)
AC_PREREQ(2.59)

RSYNC_VERSION=2.6.7cvs
AC_SUBST(RSYNC_VERSION)
AC_MSG_NOTICE([Configuring rsync $RSYNC_VERSION])

AC_DEFINE_UNQUOTED(RSYNC_VERSION, ["$RSYNC_VERSION"], [rsync release version])

LDFLAGS=${LDFLAGS-""}

AC_CANONICAL_TARGET([])

dnl Checks for programs.
AC_PROG_CC
AC_PROG_CPP
AC_PROG_EGREP
AC_PROG_INSTALL
AC_PROG_CC_STDC
AC_SUBST(SHELL)

AC_DEFINE([_GNU_SOURCE], 1,
          [Define _GNU_SOURCE so that we get all necessary prototypes])

if test "x$ac_cv_prog_cc_stdc" = xno
then
	AC_MSG_WARN([rsync requires an ANSI C compiler and you don't seem to have one])
fi

# We must decide this before testing the compiler.

# Please allow this to default to yes, so that your users have more
# chance of getting a useful stack trace if problems occur.

AC_MSG_CHECKING([whether to include debugging symbols])
AC_ARG_ENABLE(debug,
	AC_HELP_STRING([--enable-debug],
		[including debugging symbols and features (default yes)]),
		[], [])

if test x"$enable_debug" = x"no"
then
    AC_MSG_RESULT(no)
    CFLAGS=${CFLAGS-"-O"}
else
    AC_MSG_RESULT([yes])
    # leave CFLAGS alone; AC_PROG_CC will try to include -g if it can
    dnl AC_DEFINE(DEBUG, 1, [Define to turn on debugging code that may slow normal operation])
    dnl CFLAGS=${CFLAGS-"-g"}
fi


AC_ARG_ENABLE(profile,
	AC_HELP_STRING([--enable-profile],
		[turn on CPU profiling (default no)],
		[], []))
if test x"$enable_profile" = xyes
then
	CFLAGS="$CFLAGS -pg"
fi


# Specifically, this turns on panic_action handling.
AC_ARG_ENABLE(maintainer-mode,
	AC_HELP_STRING([--enable-maintainer-mode],
		[turn on extra debug features],
		[], []))
if test x"$enable_maintainer_mode" = xyes
then
	CFLAGS="$CFLAGS -DMAINTAINER_MODE"
fi


# This is needed for our included version of popt.  Kind of silly, but
# I don't want our version too far out of sync.
CFLAGS="$CFLAGS -DHAVE_CONFIG_H"

# If GCC, turn on warnings.
if test x"$GCC" = x"yes"
then
	CFLAGS="$CFLAGS -Wall -W"
fi

AC_ARG_WITH(included-popt,
        [  --with-included-popt    use bundled popt library, not from system])

AC_ARG_WITH(rsync-path,
	[  --with-rsync-path=PATH  set default --rsync-path to PATH (default: rsync)],
	[ RSYNC_PATH="$with_rsync_path" ],
	[ RSYNC_PATH="rsync" ])

AC_DEFINE_UNQUOTED(RSYNC_PATH, "$RSYNC_PATH", [location of rsync on remote machine])

AC_ARG_WITH(rsyncd-conf,
	AC_HELP_STRING([--with-rsyncd-conf=PATH], [set configuration file for rsync server to PATH (default: /etc/rsyncd.conf)]),
	[ if test ! -z "$with_rsyncd_conf" ; then
		case $with_rsyncd_conf in
			yes|no)
				RSYNCD_SYSCONF="/etc/rsyncd.conf"
				;;
			/*)
				RSYNCD_SYSCONF="$with_rsyncd_conf"
				;;
			*)
                                AC_MSG_ERROR(You must specify an absolute path to --with-rsyncd-conf=PATH)
				;;
		esac
	else
		RSYNCD_SYSCONF="/etc/rsyncd.conf"
	fi ],
	[ RSYNCD_SYSCONF="/etc/rsyncd.conf" ])

AC_DEFINE_UNQUOTED(RSYNCD_SYSCONF, "$RSYNCD_SYSCONF", [location of configuration file for rsync server])

AC_ARG_WITH(rsh,
	AC_HELP_STRING([--with-rsh=CMD], [set remote shell command to CMD (default: ssh)]))

AC_CHECK_PROG(HAVE_REMSH, remsh, 1, 0)
if test x$HAVE_REMSH = x1; then
	AC_DEFINE(HAVE_REMSH, 1, [Define to 1 if remote shell is remsh, not rsh])
fi

if test x"$with_rsh" != x
then
	RSYNC_RSH="$with_rsh"
else
	RSYNC_RSH="ssh"
fi
AC_DEFINE_UNQUOTED(RSYNC_RSH, "$RSYNC_RSH", [default -e command])

AC_MSG_CHECKING([the group for user "nobody"])
if grep '^nobody:' /etc/group >/dev/null 2>&1; then
    NOBODY_GROUP=nobody
elif grep '^nogroup:' /etc/group >/dev/null 2>&1; then
    NOBODY_GROUP=nogroup
else
    NOBODY_GROUP=nobody # test for others?
fi
AC_MSG_RESULT($NOBODY_GROUP)
AC_DEFINE_UNQUOTED(NOBODY_USER, "nobody", [unprivileged user--e.g. nobody])
AC_DEFINE_UNQUOTED(NOBODY_GROUP, "$NOBODY_GROUP", [unprivileged group for unprivileged user])

# arrgh. libc in the current debian stable screws up the largefile
# stuff, getting byte range locking wrong
AC_CACHE_CHECK([for broken largefile support],rsync_cv_HAVE_BROKEN_LARGEFILE,[
AC_TRY_RUN([
#define _FILE_OFFSET_BITS 64
#include <stdio.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/wait.h>

int main(void)
{
	struct flock lock;
	int status;
	char tpl[32] = "/tmp/locktest.XXXXXX";
	int fd = mkstemp(tpl);
	if (fd < 0) {
		strcpy(tpl, "conftest.dat");
		fd = open(tpl, O_CREAT|O_RDWR, 0600);
	}

	lock.l_type = F_WRLCK;
	lock.l_whence = SEEK_SET;
	lock.l_start = 0;
	lock.l_len = 1;
	lock.l_pid = 0;
	fcntl(fd,F_SETLK,&lock);
	if (fork() == 0) {
		lock.l_start = 1;
		_exit(fcntl(fd,F_SETLK,&lock) == 0);
	}
	wait(&status);
	unlink(tpl);
	exit(WEXITSTATUS(status));
}
],
rsync_cv_HAVE_BROKEN_LARGEFILE=yes,rsync_cv_HAVE_BROKEN_LARGEFILE=no,rsync_cv_HAVE_BROKEN_LARGEFILE=cross)])
if test x"$rsync_cv_HAVE_BROKEN_LARGEFILE" != x"yes"; then
   AC_SYS_LARGEFILE
fi

ipv6type=unknown
ipv6lib=none
ipv6trylibc=yes

AC_ARG_ENABLE(ipv6,
	AC_HELP_STRING([--disable-ipv6], [don't even try to use IPv6]))

dnl Do you want to disable use of locale functions
AH_TEMPLATE([CONFIG_LOCALE],
[Undefine if you don't want locale features.  By default this is defined.])
AC_ARG_ENABLE([locale],
	AC_HELP_STRING([--disable-locale], [turn off locale features]),
[if test x$enableval = xyes; then
  AC_DEFINE(CONFIG_LOCALE)
fi],
AC_DEFINE(CONFIG_LOCALE)
)

if test "x$enable_ipv6" != xno
then
	AC_MSG_CHECKING([ipv6 stack type])
	for i in inria kame linux-glibc linux-inet6 toshiba v6d zeta; do
		case $i in
		inria)
			# http://www.kame.net/
			AC_EGREP_CPP(yes, [
#include <netinet/in.h>
#ifdef IPV6_INRIA_VERSION
yes
#endif],
				[ipv6type=$i;
				AC_DEFINE(INET6, 1, [true if you have IPv6])
				])
			;;
		kame)
			# http://www.kame.net/
			AC_EGREP_CPP(yes, [
#include <netinet/in.h>
#ifdef __KAME__
yes
#endif],
				[ipv6type=$i;
				AC_DEFINE(INET6, 1, [true if you have IPv6])])
			;;
		linux-glibc)
			# http://www.v6.linux.or.jp/
			AC_EGREP_CPP(yes, [
#include <features.h>
#if defined(__GLIBC__) && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 1
yes
#endif],
				[ipv6type=$i;
AC_DEFINE(INET6, 1, [true if you have IPv6])])
			;;
		linux-inet6)
			# http://www.v6.linux.or.jp/
			if test -d /usr/inet6 -o -f /usr/inet6/lib/libinet6.a; then
				ipv6type=$i
				ipv6lib=inet6
				ipv6libdir=/usr/inet6/lib
				ipv6trylibc=yes;
				AC_DEFINE(INET6, 1, [true if you have IPv6])
				CFLAGS="-I/usr/inet6/include $CFLAGS"
			fi
			;;
		toshiba)
			AC_EGREP_CPP(yes, [
#include <sys/param.h>
#ifdef _TOSHIBA_INET6
yes
#endif],
				[ipv6type=$i;
				ipv6lib=inet6;
				ipv6libdir=/usr/local/v6/lib;
				AC_DEFINE(INET6, 1, [true if you have IPv6])])
			;;
		v6d)
			AC_EGREP_CPP(yes, [
#include </usr/local/v6/include/sys/v6config.h>
#ifdef __V6D__
yes
#endif],
				[ipv6type=$i;
				ipv6lib=v6;
				ipv6libdir=/usr/local/v6/lib;
				AC_DEFINE(INET6, 1, [true if you have IPv6])])
			;;
		zeta)
			AC_EGREP_CPP(yes, [
#include <sys/param.h>
#ifdef _ZETA_MINAMI_INET6
yes
#endif],
				[ipv6type=$i;
				ipv6lib=inet6;
				ipv6libdir=/usr/local/v6/lib;
				AC_DEFINE(INET6, 1, [true if you have IPv6])])
			;;
		esac
		if test "$ipv6type" != "unknown"; then
			break
		fi
	done
	AC_MSG_RESULT($ipv6type)

	AC_SEARCH_LIBS(getaddrinfo, inet6)
fi

AC_MSG_CHECKING([whether to call shutdown on all sockets])
case $host_os in
	*cygwin* ) AC_MSG_RESULT(yes)
                   AC_DEFINE(SHUTDOWN_ALL_SOCKETS, 1,
			    [Define to 1 if sockets need to be shutdown])
		   ;;
	       * ) AC_MSG_RESULT(no);;
esac

AC_C_BIGENDIAN
AC_HEADER_DIRENT
AC_HEADER_TIME
AC_HEADER_SYS_WAIT
AC_CHECK_HEADERS(sys/fcntl.h sys/select.h fcntl.h sys/time.h sys/unistd.h \
    unistd.h utime.h grp.h compat.h sys/param.h ctype.h sys/wait.h \
    sys/ioctl.h sys/filio.h string.h stdlib.h sys/socket.h sys/mode.h \
    sys/un.h glob.h mcheck.h arpa/inet.h arpa/nameser.h locale.h \
    netdb.h malloc.h float.h)
AC_HEADER_MAJOR

AC_CHECK_SIZEOF(int)
AC_CHECK_SIZEOF(long)
AC_CHECK_SIZEOF(long long)
AC_CHECK_SIZEOF(short)
AC_CHECK_SIZEOF(off_t)
AC_CHECK_SIZEOF(off64_t)

AC_C_INLINE
AC_C_LONG_DOUBLE

AC_TYPE_SIGNAL
AC_TYPE_UID_T
AC_TYPE_MODE_T
AC_TYPE_OFF_T
AC_TYPE_SIZE_T
AC_TYPE_PID_T
AC_TYPE_GETGROUPS
AC_CHECK_MEMBERS([struct stat.st_rdev])

TYPE_SOCKLEN_T

AC_CACHE_CHECK([for errno in errno.h],rsync_cv_errno, [
    AC_TRY_COMPILE([#include <errno.h>],[int i = errno],
	rsync_cv_errno=yes,rsync_cv_have_errno_decl=no)])
if test x"$rsync_cv_errno" = x"yes"; then
   AC_DEFINE(HAVE_ERRNO_DECL, 1, [Define to 1 if errno is declared in errno.h])
fi

# The following test taken from the cvs sources
# If we can't find connect, try looking in -lsocket, -lnsl, and -linet.
# These need checks to be before checks for any other functions that
#    might be in the same libraries.
# The Irix 5 libc.so has connect and gethostbyname, but Irix 5 also has
# libsocket.so which has a bad implementation of gethostbyname (it
# only looks in /etc/hosts), so we only look for -lsocket if we need
# it.
AC_CHECK_FUNCS(connect)
if test x"$ac_cv_func_connect" = x"no"; then
    case "$LIBS" in
    *-lnsl*) ;;
    *) AC_CHECK_LIB(nsl_s, printf) ;;
    esac
    case "$LIBS" in
    *-lnsl*) ;;
    *) AC_CHECK_LIB(nsl, printf) ;;
    esac
    case "$LIBS" in
    *-lsocket*) ;;
    *) AC_CHECK_LIB(socket, connect) ;;
    esac
    case "$LIBS" in
    *-linet*) ;;
    *) AC_CHECK_LIB(inet, connect) ;;
    esac
    dnl We can't just call AC_CHECK_FUNCS(connect) here, because the value
    dnl has been cached.
    if test x"$ac_cv_lib_socket_connect" = x"yes" ||
       test x"$ac_cv_lib_inet_connect" = x"yes"; then
        # ac_cv_func_connect=yes
        # don't!  it would cause AC_CHECK_FUNC to succeed next time configure is run
        AC_DEFINE(HAVE_CONNECT, 1, [Define to 1 if you have the "connect" function])
    fi
fi

AC_CHECK_LIB(resolv, inet_ntop)

dnl AC_MSG_NOTICE([Looking in libraries: $LIBS])

AC_CHECK_FUNCS(inet_ntop, , [AC_LIBOBJ(lib/inet_ntop)])
AC_CHECK_FUNCS(inet_pton, , [AC_LIBOBJ(lib/inet_pton)])

# Irix 6.5 has getaddrinfo but not the corresponding defines, so use
#   builtin getaddrinfo if one of the defines don't exist
AC_CACHE_CHECK([whether defines needed by getaddrinfo exist],
               rsync_cv_HAVE_GETADDR_DEFINES,[
			AC_EGREP_CPP(yes, [
			#include <sys/types.h>
			#include <sys/socket.h>
			#include <netdb.h>
			#ifdef AI_PASSIVE
			yes
			#endif],
			rsync_cv_HAVE_GETADDR_DEFINES=yes,
			rsync_cv_HAVE_GETADDR_DEFINES=no)])
if test x"$rsync_cv_HAVE_GETADDR_DEFINES" = x"yes"; then
	# Tru64 UNIX has getaddrinfo() but has it renamed in libc as
	# something else so we must include <netdb.h> to get the
	# redefinition.
	AC_CHECK_FUNCS(getaddrinfo, ,
		[AC_MSG_CHECKING([for getaddrinfo by including <netdb.h>])
		AC_TRY_LINK([#include <sys/types.h>
		#include <sys/socket.h>
		#include <netdb.h>],[getaddrinfo(NULL, NULL, NULL, NULL);],
			[AC_MSG_RESULT([yes])
			AC_DEFINE(HAVE_GETADDRINFO, 1,
				[Define to 1 if you have the "getaddrinfo" function.])],
			[AC_MSG_RESULT([no])
			AC_LIBOBJ(lib/getaddrinfo)])])
	AC_CHECK_FUNCS(getnameinfo, , [AC_LIBOBJ(lib/getnameinfo)])
else
	AC_LIBOBJ(lib/getaddrinfo)
	AC_LIBOBJ(lib/getnameinfo)
fi

AC_CHECK_MEMBER([struct sockaddr.sa_len],
		[ AC_DEFINE(HAVE_SOCKADDR_LEN, 1, [Do we have sockaddr.sa_len?]) ],
		[],
		[
#include <sys/types.h>
#include <sys/socket.h>
])

AC_CHECK_MEMBER([struct sockaddr_in.sin_len],
		[ AC_DEFINE(HAVE_SOCKADDR_IN_LEN, 1, [Do we have sockaddr_in.sin_len?]) ],
		[],
		[
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
])

AC_CHECK_MEMBER([struct sockaddr_un.sun_len],
		[ AC_DEFINE(HAVE_SOCKADDR_UN_LEN, 1, [Do we have sockaddr_un.sun_len?]) ],
		[],
		[
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
])

AC_MSG_CHECKING(struct sockaddr_storage)
AC_TRY_COMPILE([#include <sys/types.h>
#include <sys/socket.h>],
[struct sockaddr_storage x;],
	AC_MSG_RESULT(yes)
	AC_DEFINE(HAVE_SOCKADDR_STORAGE, 1,
		[Define to 1 if you have struct sockaddr_storage.] ),
	AC_MSG_RESULT(no))

AC_CHECK_MEMBER([struct sockaddr_in6.sin6_scope_id],
		[ AC_DEFINE(HAVE_SOCKADDR_IN6_SCOPE_ID, 1, [Do we have sockaddr_in6.sin6_scope_id?]) ],
		[],
		[
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
])

AC_MSG_CHECKING(struct stat64)
AC_TRY_COMPILE([#include <stdio.h>
#if HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#if HAVE_SYS_STAT_H
# include <sys/stat.h>
#endif
#if STDC_HEADERS
# include <stdlib.h>
# include <stddef.h>
#else
# if HAVE_STDLIB_H
#  include <stdlib.h>
# endif
#endif
],[struct stat64 st;],
    AC_MSG_RESULT(yes)
	AC_DEFINE(HAVE_STRUCT_STAT64,1,[Define to 1 if you have struct stat64.]),
    AC_MSG_RESULT(no))

# if we can't find strcasecmp, look in -lresolv (for Unixware at least)
#
AC_CHECK_FUNCS(strcasecmp)
if test x"$ac_cv_func_strcasecmp" = x"no"; then
    AC_CHECK_LIB(resolv, strcasecmp)
fi

dnl At the moment we don't test for a broken memcmp(), because all we
dnl need to do is test for equality, not comparison, and it seems that
dnl every platform has a memcmp that can do at least that.
dnl AC_FUNC_MEMCMP

AC_FUNC_UTIME_NULL
AC_FUNC_ALLOCA
AC_CHECK_FUNCS(waitpid wait4 getcwd strdup chown chmod lchmod mknod mkfifo \
    fchmod fstat ftruncate strchr readlink link utime utimes lutimes strftime \
    memmove lchown vsnprintf snprintf vasprintf asprintf setsid glob strpbrk \
    strlcat strlcpy strtol mallinfo getgroups setgroups geteuid getegid \
    setlocale setmode open64 lseek64 mkstemp64 mtrace va_copy __va_copy \
    strerror putenv)

AC_CHECK_FUNCS(getpgrp tcgetpgrp)
if test $ac_cv_func_getpgrp = yes; then
    AC_FUNC_GETPGRP
fi

# Determine whether chown follows symlinks (it should).
AC_CACHE_CHECK([whether chown() dereferences symlinks],rsync_cv_chown_follows_symlink,[
  AC_TRY_RUN([
#if HAVE_UNISTD_H
# include <unistd.h>
#endif
#include <stdlib.h>
#include <errno.h>
    main() {
	char const *dangling_symlink = "conftest.dangle";
	unlink(dangling_symlink);
	if (symlink("conftest.no-such", dangling_symlink) < 0) abort();
	if (chown(dangling_symlink, getuid(), getgid()) < 0 && errno == ENOENT) exit(0);
	exit(1);
    }],
  rsync_cv_chown_follows_symlink=yes,rsync_cv_chown_follows_symlink=no,rsync_cv_chown_follows_symlink=yes)])
if test $rsync_cv_chown_follows_symlink = no; then
  AC_DEFINE(CHOWN_MODIFIES_SYMLINK, 1, [Define to 1 if chown modifies symlinks.])
fi

AC_CACHE_CHECK([for working socketpair],rsync_cv_HAVE_SOCKETPAIR,[
AC_TRY_RUN([
#include <sys/types.h>
#include <sys/socket.h>

main() {
       int fd[2];
       exit((socketpair(AF_UNIX, SOCK_STREAM, 0, fd) != -1) ? 0 : 1);
}],
rsync_cv_HAVE_SOCKETPAIR=yes,rsync_cv_HAVE_SOCKETPAIR=no,rsync_cv_HAVE_SOCKETPAIR=cross)])
if test x"$rsync_cv_HAVE_SOCKETPAIR" = x"yes"; then
    AC_DEFINE(HAVE_SOCKETPAIR, 1, [Define to 1 if you have the "socketpair" function])
fi

if test x"$with_included_popt" != x"yes"
then
    AC_CHECK_LIB(popt, poptGetContext, , [with_included_popt=yes])
fi

AC_MSG_CHECKING([whether to use included libpopt])
if test x"$with_included_popt" = x"yes"
then
    AC_MSG_RESULT($srcdir/popt)
    BUILD_POPT='$(popt_OBJS)'
    CFLAGS="$CFLAGS -I$srcdir/popt"
    if test x"$ALLOCA" != x
    then
	# this can be removed when/if we add an included alloca.c;
	#  see autoconf documentation on AC_FUNC_ALLOCA
	AC_MSG_WARN([included libpopt will use malloc, not alloca (which wastes a small amount of memory)])
    fi
else
    AC_MSG_RESULT(no)
fi

AC_CACHE_CHECK([for unsigned char],rsync_cv_SIGNED_CHAR_OK,[
AC_TRY_COMPILE([],[signed char *s = ""],
rsync_cv_SIGNED_CHAR_OK=yes,rsync_cv_SIGNED_CHAR_OK=no)])
if test x"$rsync_cv_SIGNED_CHAR_OK" = x"yes"; then
    AC_DEFINE(SIGNED_CHAR_OK, 1, [Define to 1 if "signed char" is a valid type])
fi

AC_CACHE_CHECK([for broken readdir],rsync_cv_HAVE_BROKEN_READDIR,[
AC_TRY_RUN([#include <sys/types.h>
#include <dirent.h>
main() { struct dirent *di; DIR *d = opendir("."); di = readdir(d);
if (di && di->d_name[-2] == '.' && di->d_name[-1] == 0 &&
di->d_name[0] == 0) exit(0); exit(1);} ],
rsync_cv_HAVE_BROKEN_READDIR=yes,rsync_cv_HAVE_BROKEN_READDIR=no,rsync_cv_HAVE_BROKEN_READDIR=cross)])
if test x"$rsync_cv_HAVE_BROKEN_READDIR" = x"yes"; then
    AC_DEFINE(HAVE_BROKEN_READDIR, 1, [Define to 1 if readdir() is broken])
fi

AC_CACHE_CHECK([for utimbuf],rsync_cv_HAVE_UTIMBUF,[
AC_TRY_COMPILE([#include <sys/types.h>
#include <utime.h>],
[struct utimbuf tbuf;  tbuf.actime = 0; tbuf.modtime = 1; exit(utime("foo.c",&tbuf));],
rsync_cv_HAVE_UTIMBUF=yes,rsync_cv_HAVE_UTIMBUF=no)])
if test x"$rsync_cv_HAVE_UTIMBUF" = x"yes"; then
    AC_DEFINE(HAVE_UTIMBUF, 1, [Define to 1 if you have the "struct utimbuf" type])
fi

AC_CACHE_CHECK([if gettimeofday takes tz argument],rsync_cv_HAVE_GETTIMEOFDAY_TZ,[
AC_TRY_COMPILE([#include <sys/time.h>
#include <unistd.h>],
[struct timeval tv; exit(gettimeofday(&tv, NULL));],
rsync_cv_HAVE_GETTIMEOFDAY_TZ=yes,rsync_cv_HAVE_GETTIMEOFDAY_TZ=no)])
if test x"$rsync_cv_HAVE_GETTIMEOFDAY_TZ" != x"no"; then
    AC_DEFINE(HAVE_GETTIMEOFDAY_TZ, 1, [Define to 1 if gettimeofday() takes a time-zone arg])
fi

AC_CACHE_CHECK([for C99 vsnprintf],rsync_cv_HAVE_C99_VSNPRINTF,[
AC_TRY_RUN([
#include <sys/types.h>
#include <stdarg.h>
void foo(const char *format, ...) {
       va_list ap;
       int len;
       char buf[5];

       va_start(ap, format);
       len = vsnprintf(0, 0, format, ap);
       va_end(ap);
       if (len != 5) exit(1);

       if (snprintf(buf, 3, "hello") != 5 || strcmp(buf, "he") != 0) exit(1);

       exit(0);
}
main() { foo("hello"); }
],
rsync_cv_HAVE_C99_VSNPRINTF=yes,rsync_cv_HAVE_C99_VSNPRINTF=no,rsync_cv_HAVE_C99_VSNPRINTF=cross)])
if test x"$rsync_cv_HAVE_C99_VSNPRINTF" = x"yes"; then
    AC_DEFINE(HAVE_C99_VSNPRINTF, 1, [Define to 1 if vsprintf has a C99-compatible return value])
fi


AC_CACHE_CHECK([for secure mkstemp],rsync_cv_HAVE_SECURE_MKSTEMP,[
AC_TRY_RUN([#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
main() {
  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);
}],
rsync_cv_HAVE_SECURE_MKSTEMP=yes,
rsync_cv_HAVE_SECURE_MKSTEMP=no,
rsync_cv_HAVE_SECURE_MKSTEMP=cross)])
if test x"$rsync_cv_HAVE_SECURE_MKSTEMP" = x"yes"; then
    case $target_os in
    hpux*)
	dnl HP-UX has a broken mkstemp() implementation they refuse to fix,
	dnl so we noisily skip using it.  See HP change request JAGaf34426
	dnl for details. (sbonds)
	AC_MSG_WARN(Skipping broken HP-UX mkstemp() -- using mktemp() instead)
	;;
    *)
	AC_DEFINE(HAVE_SECURE_MKSTEMP, 1, [Define to 1 if mkstemp() is available and works right])
	;;
    esac
fi


AC_CACHE_CHECK([for broken inet_ntoa],rsync_cv_REPLACE_INET_NTOA,[
AC_TRY_RUN([
#include <stdio.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/inet.h>
main() { struct in_addr ip; ip.s_addr = 0x12345678;
if (strcmp(inet_ntoa(ip),"18.52.86.120") &&
    strcmp(inet_ntoa(ip),"120.86.52.18")) { exit(1); }
exit(0);}],
           rsync_cv_REPLACE_INET_NTOA=no,rsync_cv_REPLACE_INET_NTOA=yes,rsync_cv_REPLACE_INET_NTOA=cross)])
if test x"$rsync_cv_REPLACE_INET_NTOA" = x"yes"; then
    AC_DEFINE(REPLACE_INET_NTOA, 1, [Define to 1 if inet_ntoa() needs to be replaced])
fi


AC_CACHE_CHECK([for broken inet_aton],rsync_cv_REPLACE_INET_ATON,[
AC_TRY_RUN([
#include <stdio.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/inet.h>
main() { struct in_addr ip;
if (inet_aton("example", &ip) == 0) exit(0); exit(1);}],
           rsync_cv_REPLACE_INET_ATON=no,rsync_cv_REPLACE_INET_ATON=yes,rsync_cv_REPLACE_INET_ATON=cross)])
if test x"$rsync_cv_REPLACE_INET_ATON" = x"yes"; then
    AC_DEFINE(REPLACE_INET_ATON, 1, [Define to 1 if inet_aton() needs to be replaced])
fi

AC_CACHE_CHECK([if mknod creates FIFOs],rsync_cv_MKNOD_CREATES_FIFOS,[
AC_TRY_RUN([
#include <stdio.h>
#include <sys/stat.h>
#include <errno.h>
main() { int rc, ec; char *fn = "fifo-test";
unlink(fn); rc = mknod(fn,S_IFIFO,0600); ec = errno; unlink(fn);
if (rc) {printf("%d %d\n",rc,ec); return ec;}
return 0;}],
           rsync_cv_MKNOD_CREATES_FIFOS=yes,rsync_cv_MKNOD_CREATES_FIFOS=no,rsync_cv_MKNOD_CREATES_FIFOS=cross)])
if test x"$rsync_cv_MKNOD_CREATES_FIFOS" = x"yes"; then
    AC_DEFINE(MKNOD_CREATES_FIFOS, 1, [Define to 1 if mknod() can create FIFOs.])
fi

AC_CACHE_CHECK([if mknod creates sockets],rsync_cv_MKNOD_CREATES_SOCKETS,[
AC_TRY_RUN([
#include <stdio.h>
#include <sys/stat.h>
#include <errno.h>
main() { int rc, ec; char *fn = "sock-test";
unlink(fn); rc = mknod(fn,S_IFSOCK,0600); ec = errno; unlink(fn);
if (rc) {printf("%d %d\n",rc,ec); return ec;}
return 0;}],
           rsync_cv_MKNOD_CREATES_SOCKETS=yes,rsync_cv_MKNOD_CREATES_SOCKETS=no,rsync_cv_MKNOD_CREATES_SOCKETS=cross)])
if test x"$rsync_cv_MKNOD_CREATES_SOCKETS" = x"yes"; then
    AC_DEFINE(MKNOD_CREATES_SOCKETS, 1, [Define to 1 if mknod() can create sockets.])
fi

#
# The following test was mostly taken from the tcl/tk plus patches
#
AC_CACHE_CHECK([whether -c -o works],rsync_cv_DASHC_WORKS_WITH_DASHO,[
rm -rf conftest*
cat > conftest.$ac_ext <<EOF
int main() { return 0; }
EOF
${CC-cc} -c -o conftest..o conftest.$ac_ext
if test -f conftest..o; then
    rsync_cv_DASHC_WORKS_WITH_DASHO=yes
else
    rsync_cv_DASHC_WORKS_WITH_DASHO=no
fi
rm -rf conftest*
])
if test x"$rsync_cv_DASHC_WORKS_WITH_DASHO" = x"yes"; then
    OBJ_SAVE="#"
    OBJ_RESTORE="#"
    CC_SHOBJ_FLAG='-o $@'
else
    OBJ_SAVE='	@b=`basename $@ .o`;rm -f $$b.o.sav;if test -f $$b.o; then mv $$b.o $$b.o.sav;fi;'
    OBJ_RESTORE='	@b=`basename $@ .o`;if test "$$b.o" != "$@"; then mv $$b.o $@; if test -f $$b.o.sav; then mv $$b.o.sav $$b.o; fi; fi'
    CC_SHOBJ_FLAG=""
fi

AC_SUBST(OBJ_SAVE)
AC_SUBST(OBJ_RESTORE)
AC_SUBST(CC_SHOBJ_FLAG)
AC_SUBST(BUILD_POPT)

AC_CONFIG_FILES([Makefile lib/dummy zlib/dummy popt/dummy shconfig])
AC_OUTPUT

AC_MSG_RESULT()
AC_MSG_RESULT([    rsync ${RSYNC_VERSION} configuration successful])
AC_MSG_RESULT()