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

AC_INIT(search.c)
AC_CONFIG_HEADER(config.h:config_h.in)

dnl Checks for programs.
AC_PROG_YACC
AC_PROG_CC
dnl AC_PROG_INSTALL
dnl AC_PROG_LEX
AC_PROG_LN_S
AC_PROG_MAKE_SET

dnl Check for a less/more/pg type program & a crypt/des type program
ac_save_path="$PATH"
PATH=$PATH:/usr/local/bin:/bin:/usr/bin:/usr/libexec:/usr/sbin:/usr/etc:/etc
AC_PATH_PROGS(DFLT_PAGER, less more pg cat, cat)
AC_PATH_PROGS(CRYPT_PATH, crypt)
AC_PATH_PROGS(DES, des)
PATH="$ac_save_path"

dnl Checks for libraries.
TERMLIBS=
dnl I picked box because it is less likely to need -lterm* then initscr
AC_CHECK_LIB(curses, box, [TERMLIBS="$TERMLIBS -lcurses"])
dnl AC_CHECK_LIB(termcap, tgetent, [TERMLIBS="$TERMLIBS -ltermcap"])
dnl AC_CHECK_LIB(termlib, tgetent, [have_termlib=yes], [have_termlib=no])
# Systems that have -ltermlib should use that before -ltermcap (e.g. SVR4)
found_termlib=''
for termlib in termlib termcap terminfo curses ; do
  AC_CHECK_LIB(${termlib}, main, [LIBS="${LIBS} -l${termlib}"])
   case " ${LIBS} " in
     *" -l${termlib} "* ) found_termlib=t; break ;;
   esac
done
if test ".${found_termlib}" = "." ; then 
   AC_DEFINE(NO_TERMCAP)
fi
dnl Regular expressions (regcmp) are in -lgen on Solaris 2,
dnl and in -lintl on SCO Unix.
AC_CHECK_LIB(gen, regcmp)
AC_CHECK_LIB(intl, regcmp)
AC_CHECK_LIB(PW, regcmp)

#--------------------------------------------------------------------
#	On a few very rare systems, all of the libm.a stuff is
#	already in libc.a.  Set compiler flags accordingly.
#	Also, Linux requires the "ieee" library for math to work
#	right (and it must appear before "-lm").
#--------------------------------------------------------------------
dnl AC_CHECK_FUNC(ceil, MATH_LIBS="", MATH_LIBS="-lm")
AC_CHECK_LIB(m, main, MATH_LIBS="-lm", MATH_LIBS="")
AC_CHECK_LIB(ieee, main, [MATH_LIBS="-lieee $MATH_LIBS"])
LIBS="$LIBS $MATH_LIBS"
dnl AC_SUBST(MATH_LIBS)

dnl Solaris has curses & termcap, but they don't work without libucb
dnl which is broken, so we use termlib.
AC_MSG_CHECKING(for working terminal libraries)
SAVE_LIBS=$LIBS
LIBS="$LIBS $TERMLIBS"
AC_TRY_LINK(, [tgetent(0); tgetflag(0); tgetnum(0); tgetstr(0);],
  [termok=yes], [termok=no])
if test $termok = yes; then
  AC_MSG_RESULT(using $TERMLIBS)
else
  LIBS="$SAVE_LIBS"
  if test $have_termlib = yes; then
    LIBS="$LIBS -ltermlib"
    AC_MSG_RESULT(using -ltermlib)
  else
    AC_MSG_RESULT(TERMINAL LIBRARY BROKEN - configure failed)
    exit 1
  fi
fi

dnl Look for the X11 include files in various places, if they're
dnl not in the compiler's path.  Substitute for `xincludedir' and
dnl `xlibdir'.  Perhaps we need different checks for Xt and Xaw?
define(AC_X11_LOCATION,
[echo checking for X11 headers and libraries
dir=""
AC_TEST_CPP([#include <X11/Intrinsic.h>], :,
  if test -r /usr/local/[[include]]/X11/Intrinsic.h; then
    dir=/usr/local/[[include]]

  elif test -r /usr/[[include]]/X11R4/X11/Intrinsic.h; then
    dir=/usr/[[include]]/X11R4
  elif test -r /usr/[[include]]/X11R5/X11/Intrinsic.h; then
    dir=/usr/[[include]]/X11R5

  elif test -r /usr/lpp/X11/Xamples/[[include]]/X11/Intrinsic.h; then
    dir=/usr/lpp/X11/Xamples/[[include]]

  elif test -r /usr/X11/[[include]]/X11/Intrinsic.h; then
    dir=/usr/X11/[[include]]
  elif test -r /usr/X11R5/[[include]]/X11/Intrinsic.h; then
    dir=/usr/X11R5/[[include]]

  elif test -r /usr/openwin/[[include]]/X11/Intrinsic.h; then
    dir=/usr/openwin/[[include]]
  elif test -r /usr/openwin/share/[[include]]/X11/Intrinsic.h; then
    dir=/usr/openwin/share/[[include]]

  elif test -r /usr/[[include]]/X11/Intrinsic.h; then
    dir= # everyone's cc searches /usr/include, right?
  else
    no_x=t
  fi
)
dnl Can't use AC_SUBST inside AC_TEST_CPP.
if test -n "$dir"; then
  xincludedir=-I$dir
  DEFS="$DEFS -I$dir"
  echo "(using $xincludedir)"
elif test -n "$no_x"; then 
  # Not all programs may use this symbol, but it won't hurt to define it.
  xincludedir=-DX_DISPLAY_MISSING
fi
AC_SUBST(xincludedir)
#
# Now check for the libraries.  Amazing how every single X vendor puts
# these in a different place, and all because MIT thought they should go
# in /usr/lib.
dir1=""
if test -r /usr/local/lib/libXt.a; then
  dir1=/usr/local/lib

elif test -r /usr/lib/X11R4/libXt.sl; then
  dir1=/usr/lib/X11R4
elif test -r /usr/lib/X11R4/libXt.a; then
  dir1=/usr/lib/X11R4
elif test -r /usr/lib/X11R5/libXt.a; then
  dir1=/usr/lib/X11R5

elif test -r /usr/lpp/X11/Xamples/lib/Xt/libXt.a; then
  dir1=/usr/lpp/X11/Xamples/lib/Xt

elif test -r /usr/X11/lib/libXt.a; then
  dir1=/usr/X11/lib
elif test -r /usr/X11R5/lib/libXt.a; then
  dir1=/usr/X11R5/lib

elif test -r /usr/openwin/lib/libXt.a; then
  dir1=/usr/openwin/lib
elif test -r /usr/openwin/lib/libXt.so; then
  dir1=/usr/openwin/lib

fi
dir2=""
if test -r /usr/lpp/X11/Xamples/lib/Xmu/libXmu.a; then
  dir2=/usr/lpp/X11/Xamples/lib/Xmu
fi
#
# It would be nice to have a more robust check for the -R ld option then
# just checking for Solaris.  The parentheses elide `uname: not found'.
# 
# It would also be nice to do this for all -L options, not just this one.
if test -n "$dir1"; then
  xlibdir=-L$dir1
  DEFS="$DEFS -L$dir1"
  if test "`(uname) 2>/dev/null`" = SunOS && uname -r | grep '^5'; then
    xlibdir="$xlibdir -R$dir1"
  fi
  #
  # Don't need all that stuff for dir2, since it only gets used on AIX.
  test -n "$dir2" && xlibdir="$xlibdir -L$dir2"
fi
#
# Check for additional X libraries.
# 
# Since we already have an explicit check for POSIXified ISC, use it.
if test -n "$ISC"; then
  wlibs="$wlibs -lnsl_s -linet"
  echo "(adding -lnsl_s -linet to wlibs)"
else
  # Martyn.Johnson@cl.cam.ac.uk says this is needed for Ultrix, if the X
  # libraries were built with DECnet support.  And karl@cs.umb.edu's Alpha
  # needs dnet_stubs.
  AC_CHECK_LIB(dnet, main,
    [wlibs="$wlibs -ldnet"
     have_dnet=t
     echo "(adding -ldnet to wlibs)"])
  if test -z "$have_dnet"; then
    AC_CHECK_LIB(dnet_stub, main,
      [wlibs="$wlibs -ldnet_stub"
       echo "(adding -ldnet_stub to wlibs)"])
  fi
  # lieder@skyler.mavd.honeywell.com says without -lsocket,
  # socket/setsockopt and other routines are undefined under SCO ODT 2.0.
  AC_CHECK_LIB(socket, main,
    [wlibs="$wlibs -lsocket"
     echo "(adding -lsocket to wlibs)"])
  AC_CHECK_LIB(nsl, main,
    [wlibs="$wlibs -lnsl"
     echo "(adding -lnsl to wlibs)"])
fi
test -n "$xlibdir" && echo "(using $xlibdir)"
LIBS="$LIBS $xlibdir $wlibs"
AC_SUBST(xlibdir)dnl
AC_SUBST(wlibs)dnl
])dnl

dnl Checks for header files.
dnl AC_CONFIG_HEADER(config.h)
AC_HEADER_STDC
AC_CHECK_HEADERS(ctype.h fcntl.h limits.h stdlib.h string.h strings.h sys/file.h sys/ioctl.h sys/ptem.h sys/stream.h sys/time.h time.h unistd.h)
AC_X11_LOCATION
AC_HEADER_CHECK(X11/X.h, AC_DEFINE(HAVE_X11_X_H) LIBS="$LIBS -lX11")


dnl Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST
AC_TYPE_SIZE_T
AC_STRUCT_ST_BLKSIZE
AC_STRUCT_TM

dnl Checks for library functions.
AC_FUNC_ALLOCA
AC_PROG_GCC_TRADITIONAL
AC_TYPE_SIGNAL
AC_CHECK_FUNCS(strchr memcpy)
AC_CHECK_FUNCS(re_comp regcmp regcomp)
dnl math.h specific (optional) functions, otherwise we use our own
AC_CHECK_FUNCS(rint pow10 fmod)
dnl curses.h specific functions
dnl keypad: BSD doesn't have this (used in lex.c)...
dnl 
AC_CHECK_FUNCS(fixterm idlok keypad notimeout reset_prog_mode reset_term_mode resetterm)


dnl AC_COMPILE_CHECK([checking for broken TIOCGWINSZ],[
dnl #include <sys/ioctl.h>
dnl #ifdef HAVE_TERMIOS_H
dnl #include <termios.h>
dnl #else /* ! HAVE_TERMIOS_H */
dnl #ifdef HAVE_TERMIO_H
dnl #include <termio.h>
dnl #else /* ! HAVE_TERMIO_H */
dnl #include <sgtty.h>
dnl #endif
dnl #endif
dnl ],[
dnl #ifdef TIOCGWINSZ
dnl struct winsize	wsize;
dnl #endif /* TIOCGWINSZ */
dnl ],
dnl [:],
dnl [AC_DEFINE(BROKEN_TIOCGWINSZ)]
dnl )

dnl AC_OUTPUT(Makefile)
AC_OUTPUT(Makefile)