dnl Process this file with autoconf to produce a configure script.
AC_INIT(eggdrop.doc)
AC_CONFIG_HEADER(config.h)

echo ""
echo "Okay, this is a GNU configure script."
echo "It's going to run a bunch of strange tests to hopefully make"
echo "your compile work without much twiddling."
echo ""
echo "First, it's gonna check for a bunch of random things... Here we go."
echo ""

dnl Checks for programs.
AC_PROG_MAKE_SET
AC_CHECK_PROG(STRIP,strip,-s)
AC_CHECK_PROG(UNAME,uname,uname)

dnl 'nawk' is NOT compatable! dammit!
AC_CHECK_PROGS(AWK,gawk mawk awk)

AC_PROG_CC
AC_PROG_RANLIB

dnl stop putting -g in there!  @#$!#$%!
CFLAGS="-O"
if test "x$CC" = "xgcc"; then
  CFLAGS="-O2 -Wall"
fi

dnl crazy machines
AC_AIX
AC_ISC_POSIX
AC_MINIX

dnl Check for OSF/1.
AC_MSG_CHECKING(for OSF/1)
if test x`${UNAME}` = "xOSF1"; then
  AC_MSG_RESULT(yes)
  AC_DEFINE(STOP_UAC)
else  
  AC_MSG_RESULT(no)
fi

if test x`${UNAME}` = "xLinux"; then
  AC_MSG_CHECKING(for Linux threads)
  cat >abacab.c <<'EOF'
#include <stdio.h>
#include <signal.h>
#include <stdlib.h>
#include <fcntl.h>
#include <asm/unistd.h>

void fn() { return; }
main() {
  long retval; unsigned long x; void **newstack;
  newstack=(void **)(x+sizeof(unsigned long));
  __asm__ __volatile__(
    "int $0x80\n\t"
    "testl %0,%0\n\t"
    "jne 1f\n\t"
    "call *%3\n\t"
    "movl %2,%0\n\t"
    "int $0x80\n"
    "1:\t"
    :"=a" (retval)
    :"0" (__NR_clone),"i" (__NR_exit),
     "r" (fn),"b" (0x0000700|SIGCHLD),"c" (newstack));
  if (retval<0) exit(1);   /* failed */
  exit(0);
}
EOF
  ${CC} -o abacab abacab.c
  if `./abacab`; then
    AC_MSG_RESULT(yes)
dnl    AC_DEFINE(LINUX_THREADS)
  else
    AC_MSG_RESULT(no)
  fi
  rm -f abacab abacab.o abacab.c
fi    

dnl Check for Sun libraries.
AC_CHECK_LIB(socket,main)
dnl AC_CHECK_LIB(ucb,main,LIBS=$LIBS -lucb -L/usr/ucblib)
AC_CHECK_LIB(nsl,main)
dnl for suns without yp or something like that:
AC_CHECK_LIB(dl,main)

dnl Checks for header files.
AC_HEADER_DIRENT
AC_HEADER_SYS_WAIT
AC_CHECK_HEADERS(sys/time.h sys/select.h sys/rusage.h unistd.h)

dnl Checks for typedefs, structures, and compiler characteristics.
AC_TYPE_PID_T
AC_HEADER_TIME

dnl Checks for library functions.
AC_CHECK_FUNCS(rename getrusage getdtablesize srandom random sigaction)
AC_CHECK_FUNCS(sigemptyset waitpid vsprintf strcasecmp)

dnl where is tcl?  is it here?

# ---------- begin robey's tcl thingies

if test "x$TCL" = "xno"; then
  echo ""
  echo "You've chosen to compile WITHOUT Tcl."
  echo ""
else
  echo ""
  echo "Now I'm gonna look for Tcl, and if I can find it, you'll compile"
  echo "using that, to get a much more powerful bot."
  echo ""

  # look for libtcl.a: if TCLLIB is set, check there first
  if test "$TCLLIB" != ""; then
    if test -r $TCLLIB/libtcl.a; then
      TCLLIBFN=libtcl.a
    elif test -r $TCLLIB/libtcl7.4.a; then
      TCLLIBFN=libtcl7.4.a
    else
      echo "Environment variable TCLLIB is set, but incorrect."
      unset TCLLIB
    fi
  fi

  # check in common places now
  AC_MSG_CHECKING(for libtcl.a)
  if test "$TCLLIB" = ""; then
    for checkfn in libtcl.a libtcl7.4.a;
    do
      if test "$TCLLIB" != ""; then
        break
      fi
      for check in /usr/local/lib /usr/local/lib/tcl /usr/local/pkgs/tcl/lib /usr/lib $HOME $HOME/tcl $HOME/tcl/lib;
      do
        if test -r $check/$checkfn; then
          AC_MSG_RESULT(found in $check/$checkfn)
          TCLLIB=$check
          TCLLIBFN=$checkfn
          break
        fi
      done
    done
  else
    AC_MSG_RESULT(found in $TCLLIB/$TCLLIBFN)
  fi

  # give up if they don't even have that
  if test "$TCLLIB" = ""; then
    AC_MSG_RESULT(not found)
  else
  # now look for pesky tcl.h file
    if test "$TCLINC" != ""; then
      if test ! -r $TCLINC/tcl.h; then
        echo "Environment variable TCLINC is set, but incorrect."
        unset TCLINC
      fi
    fi

    # check in common places now
    AC_MSG_CHECKING(for tcl.h)
    if test "$TCLINC" = ""; then
      for check in /usr/local/include /usr/local/include/tcl /usr/local/pkgs/tcl/include /usr/include /usr/include/tcl $HOME $HOME/tcl $HOME/tcl/include;
      do
        if test -r $check/tcl.h; then
          AC_MSG_RESULT(found in $check/tcl.h)
          TCLINC=$check
          break
        fi
      done
    else
      AC_MSG_RESULT(found in $TCLINC/tcl.h)
    fi
 
    # had TCLLIB but not TCLINC?  so close... :(
    if test "$TCLINC" = ""; then
      AC_MSG_RESULT(not found)
      unset TCLLIB
      unset TCLLIBFN
    fi
  fi

  # done looking, now either TCLLIB & TCLINC are both set, or neither is set

  if test "$TCLLIB" = ""; then
    echo ""
    echo "NOT using Tcl because I can't find the files I need."
    echo "Eggdrop is intended to compile with Tcl extensions, and will be"
    echo "handicapped without them.  You might want to consider installing"
    echo "Tcl on your system."
    echo ""
    echo "If you believe you DO have Tcl installed on the system, then you"
    echo "will need to set the environment variables TCLLIB and TCLINC so"
    echo "I will know where to find 'libtcl.a' and 'tcl.h' (respectively)."
    echo "Then run 'configure' again."
    echo ""
    TCL_OBJS=""
    TCL_REQS=""
  else
    AC_MSG_CHECKING(for Tcl 7.4)
    tclver=`grep TCL_VERSION $TCLINC/tcl.h | grep "7.4" | wc -l`
    if test $tclver = 1; then
      AC_MSG_RESULT(7.4 found!)
      if test "$TCLLIBFN" = "libtcl.a"; then
        libfn="tcl"
      else
        libfn="tcl7.4"
      fi
      TCL_REQS="$TCLLIB/$TCLLIBFN"
      TCL_LIBS="-L$TCLLIB -l$libfn -lm"
    else
      AC_MSG_RESULT(non-7.4 but that's okay)
      TCL_REQS="libtcle.a"
      TCL_LIBS="-L. -ltcle -lm"
    fi
    echo ""
    echo "Gonna compile WITH Tcl because you seem to have all the necessary"
    echo "files and things."
    echo ""
    echo "If for some reason you DON'T want to compile with Tcl, set the"
    echo "environment variable TCL to 'no' and run configure again."
    echo ""
    TCL_OBJS="tcl.o tclhash.o"
    TCL_DEFS="-DTCL"
  fi
fi

AC_SUBST(TCLINC)
AC_SUBST(TCLLIB)
AC_SUBST(TCLLIBFN)
AC_SUBST(TCL_OBJS)
AC_SUBST(TCL_REQS)
AC_SUBST(TCL_DEFS)
AC_SUBST(TCL_LIBS)

# ---------- end of robey's tcl thingies

AC_OUTPUT(Makefile lush.h)

# if you configure again, you must re-make everything.  tough shit.
make clean

echo ""
echo "Configure is done."
echo "Type 'make' to create the bot."
echo ""