dnl Autoconfigure input file for popclient
dnl Carl Harris, ceharris@mal.com
dnl
dnl Process this file with autoconf to produce a configure script.
dnl

AC_INIT(popclient.h)		dnl A distinctive file to look for in srcdir. 
AC_CONFIG_HEADER(config.h)

# We want these before the checks, so the checks can modify their values.
test -z "$CFLAGS" && CFLAGS=-g AC_SUBST(CFLAGS)
test -z "$LDFLAGS" && LDFLAGS=-g AC_SUBST(LDFLAGS)

AC_CANONICAL_HOST

AC_MSG_CHECKING(system mailbox directory)
if test -d /var/mail
then
	AC_DEFINE(USERFOLDER, "/var/mail/%s")
	userfolder='/var/mail/$u'
elif test -d /usr/mail
then
	AC_DEFINE(USERFOLDER, "/usr/mail/%s")
	userfolder='/usr/mail/$u'
elif test -d /usr/spool/mail
then
	AC_DEFINE(USERFOLDER, "/usr/spool/mail/%s")
	userfolder='/usr/spool/mail/$u'
elif test -d /var/spool/mail
then
	AC_DEFINE(USERFOLDER, "/var/spool/mail/%s")
	userfolder='/var/mail/$u'
else
	userfolder="can't find one, will fall back on system MDA."
fi
AC_MSG_RESULT($userfolder)

AC_MSG_CHECKING(delivery agent for $host)
case $host in
   *-*-*bsd*)
	AC_DEFINE(DEF_MDA,"/usr/libexec/mail.local %s")
	mdacmd="/usr/libexec/mail.local \$u"
	;;

   *-*-aix*)
	AC_DEFINE(DEF_MDA,"/usr/bin/bellmail %s")
	mdacmd="/usr/bin/bellmail \$u"
	;;

   *-*-hpux*)
	AC_DEFINE(DEF_MDA,"/bin/rmail -d %s")
	mdacmd="/bin/rmail -d \$u"
	;;

   *)
	if test -x "/usr/bin/deliver %s"
	then
		AC_DEFINE(DEF_MDA,"/usr/bin/deliver %s")
		mdacmd="/usr/bin/deliver \$u"
	else
		# Do *not* use the -t option!  We explicitly want only
		# local delivery to the recepients named on the command line.
		AC_DEFINE(DEF_MDA,"/usr/lib/sendmail -oem -fpopmail %s")
		mdacmd="/usr/lib/sendmail -fpopmail \$u"
	fi
	;;
esac
AC_MSG_RESULT($mdacmd)


AC_MSG_CHECKING(whether we want APOP support)
AC_ARG_WITH(APOP,
            [  --with-APOP              should we include APOP support?],
            [EXTRASRC="$EXTRASRC \$(srcdir)/md5c.c \$(srcdir)/md5ify.c"
             EXTRAOBJ="$EXTRAOBJ md5c.o md5ify.o" 
             AC_DEFINE(HAVE_APOP_SUPPORT)
             AC_MSG_RESULT(yes)],
             AC_MSG_RESULT(no))

AC_PROG_CC
AC_PROG_INSTALL
AC_PROG_CPP			dnl Later checks need this.
AC_PROG_CC_C_O
AC_AIX
AC_ISC_POSIX
AC_MINIX
AC_HEADER_STDC
AC_TYPE_SIZE_T
AC_TYPE_PID_T
AC_TYPE_SIGNAL
AC_CHECK_HEADERS(unistd.h termios.h termio.h sgtty.h memory.h) 

AC_C_CONST			dnl getopt needs this.

AC_PROG_LEX
AC_PROG_YACC
AC_SUBST(LIBOBJS)

AC_CHECK_LIB(socket,socket)
AC_CHECK_LIB(nsl,inet_addr)



AC_CHECK_FUNC(bzero, AC_DEFINE(HAVE_BZERO), 
   AC_CHECK_FUNC(memset, [AC_DEFINE(HAVE_MEMSET) 
                          AC_DEFINE(HAVE_MEMCPY)], 
                 [EXTRASRC="$EXTRASRC \$(srcdir)/bzero.c"
                  EXTRAOBJ="$EXTRALIB bzero.o"]))

AC_CHECK_FUNC(strdup, AC_DEFINE(HAVE_STRDUP), 
              [EXTRASRC="$EXTRASRC \$(srcdir)/strdup.c"
               EXTRAOBJ="$EXTRAOBJ strdup.o"])
             
AC_CHECK_FUNC(strcasecmp, AC_DEFINE(HAVE_STRCASECMP), 
              [EXTRASRC="$EXTRASRC \$(srcdir)/strcasecmp.c"
               EXTRAOBJ="$EXTRAOBJ strcasecmp.o"])
             
AC_CHECK_FUNC(getopt_long, AC_DEFINE(HAVE_GETOPTLONG),
              [EXTRASRC="$EXTRASRC \$(srcdir)/getopt.c \$(srcdir)/getopt1.c"
               EXTRAOBJ="$EXTRAOBJ getopt.o getopt1.o"])

AC_FUNC_ALLOCA
if test -n "$ALLOCA" 
then
  EXTRASRC="$EXTRASRC \$(srcdir)/alloca.c"
  EXTRAOBJ="$EXTRAOBJ alloca.o"
fi

dnl All AC_CHECK_FUNCs must precede the following AC_SUBSTs

AC_SUBST(EXTRASRC)
AC_SUBST(EXTRAOBJ)

AC_CHECK_FUNCS(dup2 strerror tcsetattr stty setsid flock)

dnl AC_FUNC_SETVBUF_REVERSED

dnl Check for usuable void pointer type
AC_MSG_CHECKING(use of void pointer type)
AC_TRY_COMPILE([],
   [char *p;
    void *xmalloc();
    p = (char *) xmalloc(1);
   ],
 [AC_DEFINE(HAVE_VOIDPOINTER) AC_MSG_RESULT(yes)],
 AC_MSG_RESULT(no))

dnl Check for usable function prototypes
AC_MSG_CHECKING(use of function prototypes);
AC_TRY_COMPILE([], 
   [int x;
    int myProtoFn (int arg); 
    x = 0;
    x = myProtoFn(x);
   ],
 [AC_DEFINE(HAVE_PROTOTYPES) AC_MSG_RESULT(yes)],
 AC_MSG_RESULT(no))
                
dnl Check out the wait reality.
AC_CHECK_HEADERS(sys/wait.h) AC_CHECK_FUNCS(waitpid wait3)
AC_MSG_CHECKING(for union wait);
AC_TRY_LINK([#include <sys/types.h>
#include <sys/wait.h>],
	 	 [union wait status; int pid; pid = wait (&status);
#ifdef WEXITSTATUS
/* Some POSIXoid systems have both the new-style macros and the old
   union wait type, and they do not work together.  If union wait
   conflicts with WEXITSTATUS et al, we don't want to use it at all.  */
if (WEXITSTATUS (status) != 0) pid = -1;
#endif
#ifdef HAVE_WAITPID
/* Make sure union wait works with waitpid.  */
pid = waitpid (-1, &status, 0);
#endif
],
  [AC_DEFINE(HAVE_UNION_WAIT) AC_MSG_RESULT(yes)],
  AC_MSG_RESULT(no))

AC_MSG_CHECKING(sys_siglist declaration in signal.h or unistd.h)
AC_TRY_LINK([#include <signal.h>
/* NetBSD declares sys_siglist in <unistd.h>.  */
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif], [char *msg = *(sys_siglist + 1);],
  [AC_DEFINE(SYS_SIGLIST_DECLARED) AC_MSG_RESULT(yes)],
  AC_MSG_RESULT(no))

# The presence of the following is not meant to imply
# that popclient necessarily works on those systems.
dnl AC_DYNIX_SEQ
dnl AC_XENIX_DIR
dnl AC_IRIX_SUN

AC_OUTPUT(Makefile, [
# Makefile uses this timestamp file to know when to remake Makefile,
# build.sh, and glob/Makefile.
touch stamp-config])

dnl Local Variables:
dnl comment-start: "dnl "
dnl comment-end: ""
dnl comment-start-skip: "\\bdnl\\b\\s *"
dnl compile-command: "make configure config.h.in"
dnl End: