dnl configure.in for cvs
AC_INIT(src/cvs.h)
dnl
AC_PREREQ(2.4)dnl Required Autoconf version.
dnl Do not use autoconf 2.12; it produces a configure script which produces
dnl a "internal 2K buffer" error on HPUX when run with /bin/sh.
dnl autoconf 2.10 seems like a good choice.
dnl
dnl It is possible that we should just change the above required version
dnl to 2.10; it seems like everyone is using 2.10 anyway, and there is
dnl at least some sentiment that we should be using a version which has
dnl --bindir (and correspondingly, using @bindir@ and friends in our
dnl Makefile.in files.  I'm not sure exactly what version of autoconf
dnl introduced --bindir but I know 2.10 has it.
AC_CONFIG_HEADER(config.h src/options.h)

AC_PROG_CC

AC_AIX
AC_MINIX
AC_ISC_POSIX
if test "$ISC" = yes; then
CFLAGS="$CFLAGS -D_SYSV3"
LIBS="-lcrypt $LIBS"
fi

AC_PREFIX_PROGRAM(cvs)

dnl FIXME: AC_C_CROSS is considered obsolete by autoconf 2.12, and is
dnl pretty ugly to start with.  But it isn't obvious to me how we should
dnl be handling the uses of cross_compiling below.
AC_C_CROSS

AC_C_CONST

AC_PROG_INSTALL
AC_PROG_RANLIB
AC_PROG_YACC
AC_PROG_MAKE_SET

AC_PATH_PROG(perl_path, perl, no)
AC_PATH_PROG(csh_path, csh, no)

AC_SYS_INTERPRETER
if test X"$ac_cv_sys_interpreter" != X"yes" ; then
  # silly trick to avoid problems in AC macros...
  ac_msg='perl scripts using #! may not be invoked properly'
  AC_MSG_WARN($ac_msg)
fi

AC_HEADER_STDC
AC_CHECK_HEADERS(errno.h unistd.h string.h memory.h utime.h fcntl.h ndbm.h \
                 sys/param.h sys/select.h sys/time.h sys/timeb.h \
                 io.h direct.h sys/bsdtypes.h sys/resource.h)
AC_HEADER_SYS_WAIT
AC_HEADER_STAT
AC_HEADER_TIME
AC_HEADER_DIRENT
AC_TYPE_SIGNAL
AC_TYPE_UID_T
AC_TYPE_MODE_T
AC_TYPE_SIZE_T
AC_TYPE_PID_T
AC_REPLACE_FUNCS(getwd mkdir rename strdup strstr dup2 strerror valloc waitpid vasprintf strtoul)
AC_CHECK_FUNCS(fchmod fsync ftime mkfifo mktemp putenv vfork vprintf ftruncate timezone getpagesize initgroups fchdir sigaction sigprocmask sigvec sigsetmask sigblock tempnam tzset readlink wait3)

dnl
dnl Look for shadow password files before we go ahead and set getspnam.
dnl On some systems (Linux), the C library has getspnam but shadow
dnl passwords might not be in use.
dnl
dnl We used to check for the existence of the /etc/security directory
dnl here, but that's incorrect, since it's possible to have PAM installed
dnl without using shadow passwords.
dnl
AC_MSG_CHECKING([for evidence of shadow passwords])
if test -f /etc/shadow \
   || test -f /etc/security/passwd.adjunct ; then
  found="yes"
  AC_CHECK_LIB(sec, getspnam)
  AC_CHECK_FUNCS(getspnam)
else
  found="no"
fi
AC_MSG_RESULT([$found])

AC_CHECK_FUNC(re_exec, :, LIBOBJS="$LIBOBJS regex.o")
AC_FUNC_UTIME_NULL
AC_SYS_LONG_FILE_NAMES

AC_MSG_CHECKING([for working fnmatch function])
AC_CACHE_VAL(ccvs_cv_sys_working_fnmatch,
[AC_TRY_RUN([
#include <fnmatch.h>
int
main ()
{
  exit ((fnmatch ("a", "a", FNM_PATHNAME) == 0
	 && fnmatch ("a", "b", FNM_PATHNAME) == FNM_NOMATCH)
	? 0 : 1);
}],
ccvs_cv_sys_working_fnmatch=yes,
ccvs_cv_sys_working_fnmatch=no,
ccvs_cv_sys_working_fnmatch=no)])
if test $ccvs_cv_sys_working_fnmatch = no; then
  LIBOBJS="$LIBOBJS fnmatch.o"
fi
AC_MSG_RESULT($ccvs_cv_sys_working_fnmatch)

# If we can't find connect, try looking in -lsocket, -lnsl, and -linet.
# 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_FUNC(connect, :, 
[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 "$ac_cv_lib_socket_connect" = "yes" || test "$ac_cv_lib_inet_connect" = "yes"; then
  ac_cv_func_connect=yes
  AC_DEFINE(HAVE_CONNECT)
fi])

dnl
dnl set $(KRB4) from --with-krb4=value -- WITH_KRB4
dnl
KRB4=/usr/kerberos
define(WITH_KRB4,[
AC_ARG_WITH([krb4],
  [  --with-krb4=value       set default \$(KRB4) from value],
  [KRB4=$withval],
)dnl
echo "default place for krb4 is $KRB4"
AC_SUBST(KRB4)])dnl
WITH_KRB4

krb_h=
AC_MSG_CHECKING([for krb.h])
AC_TRY_LINK([#include <krb.h>],[int i;],
  [krb_h=yes krb_incdir=],
  [if test "$cross_compiling" != yes && test -r $KRB4/include/krb.h; then
     hold_cflags=$CFLAGS
     CFLAGS="$CFLAGS -I$KRB4/include"
     AC_TRY_LINK([#include <krb.h>],[int i;],
       [krb_h=yes krb_incdir=$KRB4/include])
     CFLAGS=$hold_cflags
   fi])
if test -z "$krb_h"; then
  AC_TRY_LINK([#include <krb.h>],[int i;],
    [krb_h=yes krb_incdir=],
    [if test "$cross_compiling" != yes && test -r $KRB4/include/kerberosIV/krb.h; then
       hold_cflags=$CFLAGS
       CFLAGS="$CFLAGS -I$KRB4/include/kerberosIV"
       AC_TRY_LINK([#include <krb.h>],[int i;],
	 [krb_h=yes krb_incdir=$KRB4/include/kerberosIV])
       CFLAGS=$hold_cflags
     fi])
fi
AC_MSG_RESULT($krb_h)

if test -n "$krb_h"; then
  krb_lib=
  AC_CHECK_LIB(krb,printf,[krb_lib=yes krb_libdir=],
    [if test "$cross_compiling" != yes && test -r $KRB4/lib/libkrb.a; then
       krb_lib=yes krb_libdir=$KRB4/lib
     fi])
  if test -n "$krb_lib"; then
    AC_DEFINE(HAVE_KERBEROS)
    test -n "${krb_libdir}" && LIBS="${LIBS} -L${krb_libdir}"
    LIBS="${LIBS} -lkrb"
    # Put -L${krb_libdir} in LDFLAGS temporarily so that it appears before
    # -ldes in the command line.  Don't do it permanently so that we honor
    # the user's setting for LDFLAGS
    hold_ldflags=$LDFLAGS
    test -n "${krb_libdir}" && LDFLAGS="$LDFLAGS -L${krb_libdir}"
    AC_CHECK_LIB(des,printf,[LIBS="${LIBS} -ldes"])
    LDFLAGS=$hold_ldflags
    if test -n "$krb_incdir"; then
      includeopt="${includeopt} -I$krb_incdir"
      AC_SUBST(includeopt)
    fi
  fi
fi
AC_CHECK_FUNCS(krb_get_err_text)

dnl
dnl Use --with-encryption to turn on encryption support
dnl
AC_ARG_ENABLE(encryption,
  [  --enable-encryption     enable encryption support],
  [case "${enableval}" in
    yes) encryption=true ;;
    no) encryption=false ;;
    *) AC_MSG_ERROR(bad value ${enableval} for encryption option) ;;
   esac],
  [encryption=false])
if test "$encryption" = "true"; then
  AC_DEFINE(ENCRYPTION)
fi

AC_CHECK_FUNC(gethostname, :, LIBOBJS="$LIBOBJS hostname.o")

# Check for options requesting client and server feature. If none are
# given and we have connect(), we want the full client & server arrangement.
AC_ARG_ENABLE(client,
[  --enable-client         include code for running as a remote client (default)
  --disable-client        don't include remote client code],
[if test "$enable_client" = yes; then
  AC_DEFINE(CLIENT_SUPPORT)
fi],
[if test "$ac_cv_func_connect" = yes; then
  AC_DEFINE(CLIENT_SUPPORT)
fi])
AC_ARG_ENABLE(server,
[  --enable-server         include code for running as a server (default)
  --disable-server        don't include server code],
[if test "$enable_server" = yes; then
  AC_DEFINE(SERVER_SUPPORT)
fi],
[if test "$ac_cv_func_connect" = yes; then
  AC_DEFINE(SERVER_SUPPORT)
  enable_server=yes
fi])

### The auth server needs to be able to check passwords against passwd
### file entries, so we only #define AUTH_SERVER_SUPPORT if we can
### find the crypt function. 
###
### We used to test for crypt in libc first, and only add -lcrypt if
### we couldn't find it, but that interacts badly with the cache
### variables, the 'unset' command isn't portable, and I'm not sure
### there's any harm in just testing for -lcrypt first.

if test "$enable_server" = yes; then
AC_CHECK_LIB(crypt, crypt)
AC_CHECK_FUNCS(crypt)

if test "$ac_cv_func_crypt" = yes; then
  AC_DEFINE(AUTH_SERVER_SUPPORT)
fi
fi # enable_server

test -f src/options.h && (
  AC_MSG_WARN(saving ./src/options.h in ./src/options.h-SAVED)
  AC_MSG_WARN(You may wish to check that local options have not been lost.)
  AC_MSG_WARN(Do not re-run ./configure or ./config.status until you have....)
  cp ./src/options.h ./src/options.h-SAVED
)

AC_OUTPUT(Makefile lib/Makefile src/Makefile zlib/Makefile doc/Makefile \
	  man/Makefile tools/Makefile tools/pcl-cvs/Makefile \
	  contrib/Makefile contrib/elib/Makefile \
	  windows-NT/Makefile windows-NT/SCC/Makefile \
	  os2/Makefile macintosh/Makefile vms/Makefile \
	  stamp-h)