[wxWidgets.git] / build / autoconf_prepend-include / autoconf / libs.m4

# This file is part of Autoconf.                       -*- Autoconf -*-
# Checking for libraries.
# Copyright (C) 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001,
# 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.

# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301, USA.

# As a special exception, the Free Software Foundation gives unlimited
# permission to copy, distribute and modify the configure scripts that
# are the output of Autoconf.  You need not follow the terms of the GNU
# General Public License when using or distributing such scripts, even
# though portions of the text of Autoconf appear in them.  The GNU
# General Public License (GPL) does govern all other use of the material
# that constitutes the Autoconf program.
#
# Certain portions of the Autoconf source text are designed to be copied
# (in certain cases, depending on the input) into the output of
# Autoconf.  We call these the "data" portions.  The rest of the Autoconf
# source text consists of comments plus executable code that decides which
# of the data portions to output in any given case.  We call these
# comments and executable code the "non-data" portions.  Autoconf never
# copies any of the non-data portions into its output.
#
# This special exception to the GPL applies to versions of Autoconf
# released by the Free Software Foundation.  When you make and
# distribute a modified version of Autoconf, you may extend this special
# exception to the GPL to apply to your modified version as well, *unless*
# your modified version has the potential to copy into its output some
# of the text that was the non-data portion of the version that you started
# with.  (In other words, unless your change moves or copies text from
# the non-data portions to the data portions.)  If your modification has
# such potential, you must delete any notice of this special exception
# to the GPL from your modified version.
#
# Written by David MacKenzie, with help from
# Franc,ois Pinard, Karl Berry, Richard Pixley, Ian Lance Taylor,
# Roland McGrath, Noah Friedman, david d zuhn, and many others.

# Table of contents
#
# 1. Generic tests for libraries
# 2. Tests for specific libraries


## --------------------------------- ##
## 1. Generic tests for libraries.## ##
## --------------------------------- ##


# AC_SEARCH_LIBS(FUNCTION, SEARCH-LIBS,
#                [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND],
#                [OTHER-LIBRARIES])
# --------------------------------------------------------
# Search for a library defining FUNC, if it's not already available.
AC_DEFUN([AC_SEARCH_LIBS],
[AS_VAR_PUSHDEF([ac_Search], [ac_cv_search_$1])dnl
AC_CACHE_CHECK([for library containing $1], [ac_Search],
[ac_func_search_save_LIBS=$LIBS
AC_LANG_CONFTEST([AC_LANG_CALL([], [$1])])
for ac_lib in '' $2; do
  if test -z "$ac_lib"; then
    ac_res="none required"
  else
    ac_res=-l$ac_lib
    LIBS="-l$ac_lib $5 $ac_func_search_save_LIBS"
  fi
  AC_LINK_IFELSE([], [AS_VAR_SET([ac_Search], [$ac_res])])
  AS_VAR_SET_IF([ac_Search], [break])dnl
done
AS_VAR_SET_IF([ac_Search], , [AS_VAR_SET([ac_Search], [no])])dnl
rm conftest.$ac_ext
LIBS=$ac_func_search_save_LIBS])
ac_res=AS_VAR_GET([ac_Search])
AS_IF([test "$ac_res" != no],
  [test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
  $3],
      [$4])dnl
AS_VAR_POPDEF([ac_Search])dnl
])


# AC_CHECK_LIB(LIBRARY, FUNCTION,
#              [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND],
#              [OTHER-LIBRARIES])
# ------------------------------------------------------
#
# Use a cache variable name containing both the library and function name,
# because the test really is for library $1 defining function $2, not
# just for library $1.  Separate tests with the same $1 and different $2s
# may have different results.
#
# Note that using directly AS_VAR_PUSHDEF([ac_Lib], [ac_cv_lib_$1_$2])
# is asking for troubles, since AC_CHECK_LIB($lib, fun) would give
# ac_cv_lib_$lib_fun, which is definitely not what was meant.  Hence
# the AS_LITERAL_IF indirection.
#
# FIXME: This macro is extremely suspicious.  It DEFINEs unconditionally,
# whatever the FUNCTION, in addition to not being a *S macro.  Note
# that the cache does depend upon the function we are looking for.
#
# It is on purpose we used `ac_check_lib_save_LIBS' and not just
# `ac_save_LIBS': there are many macros which don't want to see `LIBS'
# changed but still want to use AC_CHECK_LIB, so they save `LIBS'.
# And ``ac_save_LIBS' is too tempting a name, so let's leave them some
# freedom.
AC_DEFUN([AC_CHECK_LIB],
[m4_ifval([$3], , [AH_CHECK_LIB([$1])])dnl
AS_LITERAL_IF([$1],
	      [AS_VAR_PUSHDEF([ac_Lib], [ac_cv_lib_$1_$2])],
	      [AS_VAR_PUSHDEF([ac_Lib], [ac_cv_lib_$1''_$2])])dnl
AC_CACHE_CHECK([for $2 in -l$1], [ac_Lib],
[ac_check_lib_save_LIBS=$LIBS
LIBS="-l$1 $5 $LIBS"
AC_LINK_IFELSE([AC_LANG_CALL([], [$2])],
	       [AS_VAR_SET([ac_Lib], [yes])],
	       [AS_VAR_SET([ac_Lib], [no])])
LIBS=$ac_check_lib_save_LIBS])
AS_IF([test AS_VAR_GET([ac_Lib]) = yes],
      [m4_default([$3], [AC_DEFINE_UNQUOTED(AS_TR_CPP(HAVE_LIB$1))
  LIBS="-l$1 $LIBS"
])],
      [$4])dnl
AS_VAR_POPDEF([ac_Lib])dnl
])# AC_CHECK_LIB


# AH_CHECK_LIB(LIBNAME)
# ---------------------
m4_define([AH_CHECK_LIB],
[AH_TEMPLATE(AS_TR_CPP([HAVE_LIB$1]),
	     [Define to 1 if you have the `$1' library (-l$1).])])


# AC_HAVE_LIBRARY(LIBRARY,
#                 [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND],
#                 [OTHER-LIBRARIES])
# ---------------------------------------------------------
#
# This macro is equivalent to calling `AC_CHECK_LIB' with a FUNCTION
# argument of `main'.  In addition, LIBRARY can be written as any of
# `foo', `-lfoo', or `libfoo.a'.  In all of those cases, the compiler
# is passed `-lfoo'.  However, LIBRARY cannot be a shell variable;
# it must be a literal name.
AU_DEFUN([AC_HAVE_LIBRARY],
[m4_pushdef([AC_Lib_Name],
	    m4_bpatsubst(m4_bpatsubst([[$1]],
				    [lib\([^\.]*\)\.a], [\1]),
			[-l], []))dnl
AC_CHECK_LIB(AC_Lib_Name, main, [$2], [$3], [$4])dnl
ac_cv_lib_[]AC_Lib_Name()=ac_cv_lib_[]AC_Lib_Name()_main
m4_popdef([AC_Lib_Name])dnl
])


## --------------------------------- ##
## 2. Tests for specific libraries.  ##
## --------------------------------- ##


# --------------------- #
# Checks for X window.  #
# --------------------- #


# _AC_PATH_X_XMKMF
# ----------------
# Internal subroutine of _AC_PATH_X.
# Set ac_x_includes and/or ac_x_libraries.
m4_define([_AC_PATH_X_XMKMF],
[AC_ARG_VAR(XMKMF, [Path to xmkmf, Makefile generator for X Window System])dnl
rm -f -r conftest.dir
if mkdir conftest.dir; then
  cd conftest.dir
  cat >Imakefile <<'_ACEOF'
incroot:
	@echo incroot='${INCROOT}'
usrlibdir:
	@echo usrlibdir='${USRLIBDIR}'
libdir:
	@echo libdir='${LIBDIR}'
_ACEOF
  if (export CC; ${XMKMF-xmkmf}) >/dev/null 2>/dev/null && test -f Makefile; then
    # GNU make sometimes prints "make[1]: Entering...", which would confuse us.
    for ac_var in incroot usrlibdir libdir; do
      eval "ac_im_$ac_var=\`\${MAKE-make} $ac_var 2>/dev/null | sed -n 's/^$ac_var=//p'\`"
    done
    # Open Windows xmkmf reportedly sets LIBDIR instead of USRLIBDIR.
    for ac_extension in a so sl; do
      if test ! -f "$ac_im_usrlibdir/libX11.$ac_extension" &&
	 test -f "$ac_im_libdir/libX11.$ac_extension"; then
	ac_im_usrlibdir=$ac_im_libdir; break
      fi
    done
    # Screen out bogus values from the imake configuration.  They are
    # bogus both because they are the default anyway, and because
    # using them would break gcc on systems where it needs fixed includes.
    case $ac_im_incroot in
	/usr/include) ac_x_includes= ;;
	*) test -f "$ac_im_incroot/X11/Xos.h" && ac_x_includes=$ac_im_incroot;;
    esac
    case $ac_im_usrlibdir in
	/usr/lib | /lib) ;;
	*) test -d "$ac_im_usrlibdir" && ac_x_libraries=$ac_im_usrlibdir ;;
    esac
  fi
  cd ..
  rm -f -r conftest.dir
fi
])# _AC_PATH_X_XMKMF


# _AC_PATH_X_DIRECT
# -----------------
# Internal subroutine of _AC_PATH_X.
# Set ac_x_includes and/or ac_x_libraries.
m4_define([_AC_PATH_X_DIRECT],
[# Standard set of common directories for X headers.
# Check X11 before X11Rn because it is often a symlink to the current release.
ac_x_header_dirs='
/usr/X11/include
/usr/X11R6/include
/usr/X11R5/include
/usr/X11R4/include

/usr/include/X11
/usr/include/X11R6
/usr/include/X11R5
/usr/include/X11R4

/usr/local/X11/include
/usr/local/X11R6/include
/usr/local/X11R5/include
/usr/local/X11R4/include

/usr/local/include/X11
/usr/local/include/X11R6
/usr/local/include/X11R5
/usr/local/include/X11R4

/usr/X386/include
/usr/x386/include
/usr/XFree86/include/X11

/usr/include
/usr/local/include
/usr/unsupported/include
/usr/athena/include
/usr/local/x11r5/include
/usr/lpp/Xamples/include

/usr/openwin/include
/usr/openwin/share/include'

if test "$ac_x_includes" = no; then
  # Guess where to find include files, by looking for Xlib.h.
  # First, try using that file with no special directory specified.
  AC_PREPROC_IFELSE([AC_LANG_SOURCE([@%:@include <X11/Xlib.h>])],
[# We can compile using X headers with no special include directory.
ac_x_includes=],
[for ac_dir in $ac_x_header_dirs; do
  if test -r "$ac_dir/X11/Xlib.h"; then
    ac_x_includes=$ac_dir
    break
  fi
done])
fi # $ac_x_includes = no

if test "$ac_x_libraries" = no; then
  # Check for the libraries.
  # See if we find them without any special options.
  # Don't add to $LIBS permanently.
  ac_save_LIBS=$LIBS
  LIBS="-lX11 $LIBS"
  AC_LINK_IFELSE([AC_LANG_PROGRAM([@%:@include <X11/Xlib.h>],
				  [XrmInitialize ()])],
		 [LIBS=$ac_save_LIBS
# We can link X programs with no special library path.
ac_x_libraries=],
		 [LIBS=$ac_save_LIBS
for ac_dir in `echo "$ac_x_includes $ac_x_header_dirs" | sed s/include/lib/g`
do
  # Don't even attempt the hair of trying to link an X program!
  for ac_extension in a so sl; do
    if test -r "$ac_dir/libX11.$ac_extension"; then
      ac_x_libraries=$ac_dir
      break 2
    fi
  done
done])
fi # $ac_x_libraries = no
])# _AC_PATH_X_DIRECT


# _AC_PATH_X
# ----------
# Compute ac_cv_have_x.
AC_DEFUN([_AC_PATH_X],
[AC_CACHE_VAL(ac_cv_have_x,
[# One or both of the vars are not set, and there is no cached value.
ac_x_includes=no ac_x_libraries=no
_AC_PATH_X_XMKMF
_AC_PATH_X_DIRECT
case $ac_x_includes,$ac_x_libraries in #(
  no,* | *,no | *\'*)
    # Didn't find X, or a directory has "'" in its name.
    ac_cv_have_x="have_x=no";; #(
  *)
    # Record where we found X for the cache.
    ac_cv_have_x="have_x=yes\
	ac_x_includes='$ac_x_includes'\
	ac_x_libraries='$ac_x_libraries'"
esac])dnl
])


# AC_PATH_X
# ---------
# If we find X, set shell vars x_includes and x_libraries to the
# paths, otherwise set no_x=yes.
# Uses ac_ vars as temps to allow command line to override cache and checks.
# --without-x overrides everything else, but does not touch the cache.
AN_HEADER([X11/Xlib.h],  [AC_PATH_X])
AC_DEFUN([AC_PATH_X],
[dnl Document the X abnormal options inherited from history.
m4_divert_once([HELP_BEGIN], [
X features:
  --x-includes=DIR    X include files are in DIR
  --x-libraries=DIR   X library files are in DIR])dnl
AC_MSG_CHECKING([for X])

AC_ARG_WITH(x, [  --with-x                use the X Window System])
# $have_x is `yes', `no', `disabled', or empty when we do not yet know.
if test "x$with_x" = xno; then
  # The user explicitly disabled X.
  have_x=disabled
else
  case $x_includes,$x_libraries in #(
    *\'*) AC_MSG_ERROR([Cannot use X directory names containing ']);; #(
    *,NONE | NONE,*) _AC_PATH_X;; #(
    *) have_x=yes;;
  esac
  eval "$ac_cv_have_x"
fi # $with_x != no

if test "$have_x" != yes; then
  AC_MSG_RESULT([$have_x])
  no_x=yes
else
  # If each of the values was on the command line, it overrides each guess.
  test "x$x_includes" = xNONE && x_includes=$ac_x_includes
  test "x$x_libraries" = xNONE && x_libraries=$ac_x_libraries
  # Update the cache value to reflect the command line values.
  ac_cv_have_x="have_x=yes\
	ac_x_includes='$x_includes'\
	ac_x_libraries='$x_libraries'"
  AC_MSG_RESULT([libraries $x_libraries, headers $x_includes])
fi
])# AC_PATH_X


# AC_PATH_XTRA
# ------------
# Find additional X libraries, magic flags, etc.
AC_DEFUN([AC_PATH_XTRA],
[AC_REQUIRE([AC_PATH_X])dnl
if test "$no_x" = yes; then
  # Not all programs may use this symbol, but it does not hurt to define it.
  AC_DEFINE([X_DISPLAY_MISSING], 1,
	    [Define to 1 if the X Window System is missing or not being used.])
  X_CFLAGS= X_PRE_LIBS= X_LIBS= X_EXTRA_LIBS=
else
  if test -n "$x_includes"; then
    X_CFLAGS="$X_CFLAGS -I$x_includes"
  fi

  # It would also be nice to do this for all -L options, not just this one.
  if test -n "$x_libraries"; then
    X_LIBS="$X_LIBS -L$x_libraries"
    # For Solaris; some versions of Sun CC require a space after -R and
    # others require no space.  Words are not sufficient . . . .
    AC_MSG_CHECKING([whether -R must be followed by a space])
    ac_xsave_LIBS=$LIBS; LIBS="$LIBS -R$x_libraries"
    ac_xsave_[]_AC_LANG_ABBREV[]_werror_flag=$ac_[]_AC_LANG_ABBREV[]_werror_flag
    ac_[]_AC_LANG_ABBREV[]_werror_flag=yes
    AC_LINK_IFELSE([AC_LANG_PROGRAM()],
      [AC_MSG_RESULT([no])
       X_LIBS="$X_LIBS -R$x_libraries"],
      [LIBS="$ac_xsave_LIBS -R $x_libraries"
       AC_LINK_IFELSE([AC_LANG_PROGRAM()],
	 [AC_MSG_RESULT([yes])
	  X_LIBS="$X_LIBS -R $x_libraries"],
	 [AC_MSG_RESULT([neither works])])])
    ac_[]_AC_LANG_ABBREV[]_werror_flag=$ac_xsave_[]_AC_LANG_ABBREV[]_werror_flag
    LIBS=$ac_xsave_LIBS
  fi

  # Check for system-dependent libraries X programs must link with.
  # Do this before checking for the system-independent R6 libraries
  # (-lICE), since we may need -lsocket or whatever for X linking.

  if test "$ISC" = yes; then
    X_EXTRA_LIBS="$X_EXTRA_LIBS -lnsl_s -linet"
  else
    # Martyn Johnson says this is needed for Ultrix, if the X
    # libraries were built with DECnet support.  And Karl Berry says
    # the Alpha needs dnet_stub (dnet does not exist).
    ac_xsave_LIBS="$LIBS"; LIBS="$LIBS $X_LIBS -lX11"
    AC_LINK_IFELSE([AC_LANG_CALL([], [XOpenDisplay])],
		   [],
    [AC_CHECK_LIB(dnet, dnet_ntoa, [X_EXTRA_LIBS="$X_EXTRA_LIBS -ldnet"])
    if test $ac_cv_lib_dnet_dnet_ntoa = no; then
      AC_CHECK_LIB(dnet_stub, dnet_ntoa,
	[X_EXTRA_LIBS="$X_EXTRA_LIBS -ldnet_stub"])
    fi])
    LIBS="$ac_xsave_LIBS"

    # msh@cis.ufl.edu says -lnsl (and -lsocket) are needed for his 386/AT,
    # to get the SysV transport functions.
    # Chad R. Larson says the Pyramis MIS-ES running DC/OSx (SVR4)
    # needs -lnsl.
    # The nsl library prevents programs from opening the X display
    # on Irix 5.2, according to T.E. Dickey.
    # The functions gethostbyname, getservbyname, and inet_addr are
    # in -lbsd on LynxOS 3.0.1/i386, according to Lars Hecking.
    AC_CHECK_FUNC(gethostbyname)
    if test $ac_cv_func_gethostbyname = no; then
      AC_CHECK_LIB(nsl, gethostbyname, X_EXTRA_LIBS="$X_EXTRA_LIBS -lnsl")
      if test $ac_cv_lib_nsl_gethostbyname = no; then
	AC_CHECK_LIB(bsd, gethostbyname, X_EXTRA_LIBS="$X_EXTRA_LIBS -lbsd")
      fi
    fi

    # lieder@skyler.mavd.honeywell.com says without -lsocket,
    # socket/setsockopt and other routines are undefined under SCO ODT
    # 2.0.  But -lsocket is broken on IRIX 5.2 (and is not necessary
    # on later versions), says Simon Leinen: it contains gethostby*
    # variants that don't use the name server (or something).  -lsocket
    # must be given before -lnsl if both are needed.  We assume that
    # if connect needs -lnsl, so does gethostbyname.
    AC_CHECK_FUNC(connect)
    if test $ac_cv_func_connect = no; then
      AC_CHECK_LIB(socket, connect, X_EXTRA_LIBS="-lsocket $X_EXTRA_LIBS", ,
	$X_EXTRA_LIBS)
    fi

    # Guillermo Gomez says -lposix is necessary on A/UX.
    AC_CHECK_FUNC(remove)
    if test $ac_cv_func_remove = no; then
      AC_CHECK_LIB(posix, remove, X_EXTRA_LIBS="$X_EXTRA_LIBS -lposix")
    fi

    # BSDI BSD/OS 2.1 needs -lipc for XOpenDisplay.
    AC_CHECK_FUNC(shmat)
    if test $ac_cv_func_shmat = no; then
      AC_CHECK_LIB(ipc, shmat, X_EXTRA_LIBS="$X_EXTRA_LIBS -lipc")
    fi
  fi

  # Check for libraries that X11R6 Xt/Xaw programs need.
  ac_save_LDFLAGS=$LDFLAGS
  test -n "$x_libraries" && LDFLAGS="$LDFLAGS -L$x_libraries"
  # SM needs ICE to (dynamically) link under SunOS 4.x (so we have to
  # check for ICE first), but we must link in the order -lSM -lICE or
  # we get undefined symbols.  So assume we have SM if we have ICE.
  # These have to be linked with before -lX11, unlike the other
  # libraries we check for below, so use a different variable.
  # John Interrante, Karl Berry
  AC_CHECK_LIB(ICE, IceConnectionNumber,
    [X_PRE_LIBS="$X_PRE_LIBS -lSM -lICE"], , $X_EXTRA_LIBS)
  LDFLAGS=$ac_save_LDFLAGS

fi
AC_SUBST(X_CFLAGS)dnl
AC_SUBST(X_PRE_LIBS)dnl
AC_SUBST(X_LIBS)dnl
AC_SUBST(X_EXTRA_LIBS)dnl
])# AC_PATH_XTRA
Commit	Line	Data
194f742f RD	1	# This file is part of Autoconf. -- Autoconf --
	2	# Checking for libraries.
	3	# Copyright (C) 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001,
580e09f7	4	# 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
194f742f RD	5
	6	# This program is free software; you can redistribute it and/or modify
	7	# it under the terms of the GNU General Public License as published by
	8	# the Free Software Foundation; either version 2, or (at your option)
	9	# any later version.
	10	#
	11	# This program is distributed in the hope that it will be useful,
	12	# but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	# GNU General Public License for more details.
	15	#
	16	# You should have received a copy of the GNU General Public License
	17	# along with this program; if not, write to the Free Software
580e09f7 DE	18	# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
580e09f7 DE	19	# 02110-1301, USA.
194f742f RD	20
	21	# As a special exception, the Free Software Foundation gives unlimited
	22	# permission to copy, distribute and modify the configure scripts that
	23	# are the output of Autoconf. You need not follow the terms of the GNU
	24	# General Public License when using or distributing such scripts, even
	25	# though portions of the text of Autoconf appear in them. The GNU
	26	# General Public License (GPL) does govern all other use of the material
	27	# that constitutes the Autoconf program.
	28	#
	29	# Certain portions of the Autoconf source text are designed to be copied
	30	# (in certain cases, depending on the input) into the output of
	31	# Autoconf. We call these the "data" portions. The rest of the Autoconf
	32	# source text consists of comments plus executable code that decides which
	33	# of the data portions to output in any given case. We call these
	34	# comments and executable code the "non-data" portions. Autoconf never
	35	# copies any of the non-data portions into its output.
	36	#
	37	# This special exception to the GPL applies to versions of Autoconf
	38	# released by the Free Software Foundation. When you make and
	39	# distribute a modified version of Autoconf, you may extend this special
	40	# exception to the GPL to apply to your modified version as well, unless
	41	# your modified version has the potential to copy into its output some
	42	# of the text that was the non-data portion of the version that you started
	43	# with. (In other words, unless your change moves or copies text from
	44	# the non-data portions to the data portions.) If your modification has
	45	# such potential, you must delete any notice of this special exception
	46	# to the GPL from your modified version.
	47	#
	48	# Written by David MacKenzie, with help from
	49	# Franc,ois Pinard, Karl Berry, Richard Pixley, Ian Lance Taylor,
	50	# Roland McGrath, Noah Friedman, david d zuhn, and many others.
	51
	52	# Table of contents
	53	#
	54	# 1. Generic tests for libraries
	55	# 2. Tests for specific libraries
	56
	57
	58	## --------------------------------- ##
	59	## 1. Generic tests for libraries.## ##
	60	## --------------------------------- ##
	61
	62
	63
	64	# AC_SEARCH_LIBS(FUNCTION, SEARCH-LIBS,
	65	# [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND],
	66	# [OTHER-LIBRARIES])
	67	# --------------------------------------------------------
	68	# Search for a library defining FUNC, if it's not already available.
	69	AC_DEFUN([AC_SEARCH_LIBS],
580e09f7 DE	70	[AS_VAR_PUSHDEF([ac_Search], [ac_cv_search_$1])dnl
580e09f7 DE	71	AC_CACHE_CHECK([for library containing $1], [ac_Search],
194f742f	72	[ac_func_search_save_LIBS=$LIBS
580e09f7 DE	73	AC_LANG_CONFTEST([AC_LANG_CALL([], [$1])])
	74	for ac_lib in '' $2; do
	75	if test -z "$ac_lib"; then
	76	ac_res="none required"
	77	else
	78	ac_res=-l$ac_lib
194f742f	79	LIBS="-l$ac_lib $5 $ac_func_search_save_LIBS"
580e09f7 DE	80	fi
	81	AC_LINK_IFELSE([], [AS_VAR_SET([ac_Search], [$ac_res])])
	82	AS_VAR_SET_IF([ac_Search], [break])dnl
	83	done
	84	AS_VAR_SET_IF([ac_Search], , [AS_VAR_SET([ac_Search], [no])])dnl
	85	rm conftest.$ac_ext
194f742f	86	LIBS=$ac_func_search_save_LIBS])
580e09f7 DE	87	ac_res=AS_VAR_GET([ac_Search])
	88	AS_IF([test "$ac_res" != no],
	89	[test "$ac_res" = "none required" \|\| LIBS="$ac_res $LIBS"
194f742f RD	90	$3],
194f742f RD	91	[$4])dnl
580e09f7	92	AS_VAR_POPDEF([ac_Search])dnl
194f742f RD	93	])
	94
	95
	96
	97	# AC_CHECK_LIB(LIBRARY, FUNCTION,
	98	# [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND],
	99	# [OTHER-LIBRARIES])
	100	# ------------------------------------------------------
	101	#
	102	# Use a cache variable name containing both the library and function name,
	103	# because the test really is for library $1 defining function $2, not
	104	# just for library $1. Separate tests with the same $1 and different $2s
	105	# may have different results.
	106	#
	107	# Note that using directly AS_VAR_PUSHDEF([ac_Lib], [ac_cv_lib_$1_$2])
	108	# is asking for troubles, since AC_CHECK_LIB($lib, fun) would give
	109	# ac_cv_lib_$lib_fun, which is definitely not what was meant. Hence
	110	# the AS_LITERAL_IF indirection.
	111	#
	112	# FIXME: This macro is extremely suspicious. It DEFINEs unconditionally,
	113	# whatever the FUNCTION, in addition to not being a *S macro. Note
	114	# that the cache does depend upon the function we are looking for.
	115	#
	116	# It is on purpose we used `ac_check_lib_save_LIBS' and not just
	117	# `ac_save_LIBS': there are many macros which don't want to see `LIBS'
	118	# changed but still want to use AC_CHECK_LIB, so they save `LIBS'.
	119	# And ``ac_save_LIBS' is too tempting a name, so let's leave them some
	120	# freedom.
	121	AC_DEFUN([AC_CHECK_LIB],
	122	[m4_ifval([$3], , [AH_CHECK_LIB([$1])])dnl
	123	AS_LITERAL_IF([$1],
	124	[AS_VAR_PUSHDEF([ac_Lib], [ac_cv_lib_$1_$2])],
	125	[AS_VAR_PUSHDEF([ac_Lib], [ac_cv_lib_$1''_$2])])dnl
580e09f7	126	AC_CACHE_CHECK([for $2 in -l$1], [ac_Lib],
194f742f RD	127	[ac_check_lib_save_LIBS=$LIBS
	128	LIBS="-l$1 $5 $LIBS"
	129	AC_LINK_IFELSE([AC_LANG_CALL([], [$2])],
580e09f7 DE	130	[AS_VAR_SET([ac_Lib], [yes])],
580e09f7 DE	131	[AS_VAR_SET([ac_Lib], [no])])
194f742f	132	LIBS=$ac_check_lib_save_LIBS])
580e09f7	133	AS_IF([test AS_VAR_GET([ac_Lib]) = yes],
194f742f RD	134	[m4_default([$3], [AC_DEFINE_UNQUOTED(AS_TR_CPP(HAVE_LIB$1))
	135	LIBS="-l$1 $LIBS"
	136	])],
	137	[$4])dnl
	138	AS_VAR_POPDEF([ac_Lib])dnl
	139	])# AC_CHECK_LIB
	140
	141
	142	# AH_CHECK_LIB(LIBNAME)
	143	# ---------------------
	144	m4_define([AH_CHECK_LIB],
580e09f7 DE	145	[AH_TEMPLATE(AS_TR_CPP([HAVE_LIB$1]),
580e09f7 DE	146	[Define to 1 if you have the `$1' library (-l$1).])])
194f742f RD	147
	148
	149	# AC_HAVE_LIBRARY(LIBRARY,
	150	# [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND],
	151	# [OTHER-LIBRARIES])
	152	# ---------------------------------------------------------
	153	#
	154	# This macro is equivalent to calling `AC_CHECK_LIB' with a FUNCTION
	155	# argument of `main'. In addition, LIBRARY can be written as any of
	156	# `foo', `-lfoo', or `libfoo.a'. In all of those cases, the compiler
	157	# is passed `-lfoo'. However, LIBRARY cannot be a shell variable;
	158	# it must be a literal name.
	159	AU_DEFUN([AC_HAVE_LIBRARY],
	160	[m4_pushdef([AC_Lib_Name],
	161	m4_bpatsubst(m4_bpatsubst([[$1]],
	162	[lib\([^\.]*\)\.a], [\1]),
	163	[-l], []))dnl
	164	AC_CHECK_LIB(AC_Lib_Name, main, [$2], [$3], [$4])dnl
	165	ac_cv_lib_[]AC_Lib_Name()=ac_cv_lib_[]AC_Lib_Name()_main
	166	m4_popdef([AC_Lib_Name])dnl
	167	])
	168
	169
	170
	171
	172	## --------------------------------- ##
	173	## 2. Tests for specific libraries. ##
	174	## --------------------------------- ##
	175
	176
	177
	178	# --------------------- #
	179	# Checks for X window. #
	180	# --------------------- #
	181
	182
	183	# _AC_PATH_X_XMKMF
	184	# ----------------
	185	# Internal subroutine of _AC_PATH_X.
	186	# Set ac_x_includes and/or ac_x_libraries.
	187	m4_define([_AC_PATH_X_XMKMF],
580e09f7 DE	188	[AC_ARG_VAR(XMKMF, [Path to xmkmf, Makefile generator for X Window System])dnl
580e09f7 DE	189	rm -f -r conftest.dir
194f742f RD	190	if mkdir conftest.dir; then
194f742f RD	191	cd conftest.dir
194f742f	192	cat >Imakefile <<'_ACEOF'
580e09f7 DE	193	incroot:
	194	@echo incroot='${INCROOT}'
	195	usrlibdir:
	196	@echo usrlibdir='${USRLIBDIR}'
	197	libdir:
	198	@echo libdir='${LIBDIR}'
194f742f	199	_ACEOF
580e09f7	200	if (export CC; ${XMKMF-xmkmf}) >/dev/null 2>/dev/null && test -f Makefile; then
194f742f	201	# GNU make sometimes prints "make[1]: Entering...", which would confuse us.
580e09f7 DE	202	for ac_var in incroot usrlibdir libdir; do
	203	eval "ac_im_$ac_var=\`\${MAKE-make} $ac_var 2>/dev/null \| sed -n 's/^$ac_var=//p'\`"
	204	done
194f742f RD	205	# Open Windows xmkmf reportedly sets LIBDIR instead of USRLIBDIR.
194f742f RD	206	for ac_extension in a so sl; do
580e09f7 DE	207	if test ! -f "$ac_im_usrlibdir/libX11.$ac_extension" &&
580e09f7 DE	208	test -f "$ac_im_libdir/libX11.$ac_extension"; then
194f742f RD	209	ac_im_usrlibdir=$ac_im_libdir; break
	210	fi
	211	done
	212	# Screen out bogus values from the imake configuration. They are
	213	# bogus both because they are the default anyway, and because
	214	# using them would break gcc on systems where it needs fixed includes.
	215	case $ac_im_incroot in
580e09f7	216	/usr/include) ac_x_includes= ;;
194f742f RD	217	*) test -f "$ac_im_incroot/X11/Xos.h" && ac_x_includes=$ac_im_incroot;;
	218	esac
	219	case $ac_im_usrlibdir in
	220	/usr/lib \| /lib) ;;
	221	*) test -d "$ac_im_usrlibdir" && ac_x_libraries=$ac_im_usrlibdir ;;
	222	esac
	223	fi
	224	cd ..
580e09f7	225	rm -f -r conftest.dir
194f742f RD	226	fi
	227	])# _AC_PATH_X_XMKMF
	228
	229
	230	# _AC_PATH_X_DIRECT
	231	# -----------------
	232	# Internal subroutine of _AC_PATH_X.
	233	# Set ac_x_includes and/or ac_x_libraries.
	234	m4_define([_AC_PATH_X_DIRECT],
	235	[# Standard set of common directories for X headers.
	236	# Check X11 before X11Rn because it is often a symlink to the current release.
	237	ac_x_header_dirs='
	238	/usr/X11/include
	239	/usr/X11R6/include
	240	/usr/X11R5/include
	241	/usr/X11R4/include
	242
	243	/usr/include/X11
	244	/usr/include/X11R6
	245	/usr/include/X11R5
	246	/usr/include/X11R4
	247
	248	/usr/local/X11/include
	249	/usr/local/X11R6/include
	250	/usr/local/X11R5/include
	251	/usr/local/X11R4/include
	252
	253	/usr/local/include/X11
	254	/usr/local/include/X11R6
	255	/usr/local/include/X11R5
	256	/usr/local/include/X11R4
	257
	258	/usr/X386/include
	259	/usr/x386/include
	260	/usr/XFree86/include/X11
	261
	262	/usr/include
	263	/usr/local/include
	264	/usr/unsupported/include
	265	/usr/athena/include
	266	/usr/local/x11r5/include
	267	/usr/lpp/Xamples/include
	268
	269	/usr/openwin/include
	270	/usr/openwin/share/include'
	271
	272	if test "$ac_x_includes" = no; then
580e09f7	273	# Guess where to find include files, by looking for Xlib.h.
194f742f	274	# First, try using that file with no special directory specified.
580e09f7	275	AC_PREPROC_IFELSE([AC_LANG_SOURCE([@%:@include <X11/Xlib.h>])],
194f742f RD	276	[# We can compile using X headers with no special include directory.
	277	ac_x_includes=],
	278	[for ac_dir in $ac_x_header_dirs; do
580e09f7	279	if test -r "$ac_dir/X11/Xlib.h"; then
194f742f RD	280	ac_x_includes=$ac_dir
	281	break
	282	fi
	283	done])
	284	fi # $ac_x_includes = no
	285
	286	if test "$ac_x_libraries" = no; then
	287	# Check for the libraries.
	288	# See if we find them without any special options.
	289	# Don't add to $LIBS permanently.
	290	ac_save_LIBS=$LIBS
580e09f7 DE	291	LIBS="-lX11 $LIBS"
	292	AC_LINK_IFELSE([AC_LANG_PROGRAM([@%:@include <X11/Xlib.h>],
	293	[XrmInitialize ()])],
194f742f RD	294	[LIBS=$ac_save_LIBS
	295	# We can link X programs with no special library path.
	296	ac_x_libraries=],
	297	[LIBS=$ac_save_LIBS
	298	for ac_dir in `echo "$ac_x_includes $ac_x_header_dirs" \| sed s/include/lib/g`
	299	do
	300	# Don't even attempt the hair of trying to link an X program!
	301	for ac_extension in a so sl; do
580e09f7	302	if test -r "$ac_dir/libX11.$ac_extension"; then
194f742f RD	303	ac_x_libraries=$ac_dir
	304	break 2
	305	fi
	306	done
	307	done])
	308	fi # $ac_x_libraries = no
	309	])# _AC_PATH_X_DIRECT
	310
	311
	312	# _AC_PATH_X
	313	# ----------
	314	# Compute ac_cv_have_x.
	315	AC_DEFUN([_AC_PATH_X],
	316	[AC_CACHE_VAL(ac_cv_have_x,
	317	[# One or both of the vars are not set, and there is no cached value.
	318	ac_x_includes=no ac_x_libraries=no
	319	_AC_PATH_X_XMKMF
	320	_AC_PATH_X_DIRECT
580e09f7 DE	321	case $ac_x_includes,$ac_x_libraries in #(
	322	no,* \| ,no \| \'*)
	323	# Didn't find X, or a directory has "'" in its name.
	324	ac_cv_have_x="have_x=no";; #(
	325	*)
	326	# Record where we found X for the cache.
	327	ac_cv_have_x="have_x=yes\
	328	ac_x_includes='$ac_x_includes'\
	329	ac_x_libraries='$ac_x_libraries'"
	330	esac])dnl
194f742f RD	331	])
	332
	333
	334	# AC_PATH_X
	335	# ---------
	336	# If we find X, set shell vars x_includes and x_libraries to the
	337	# paths, otherwise set no_x=yes.
	338	# Uses ac_ vars as temps to allow command line to override cache and checks.
	339	# --without-x overrides everything else, but does not touch the cache.
	340	AN_HEADER([X11/Xlib.h], [AC_PATH_X])
	341	AC_DEFUN([AC_PATH_X],
	342	[dnl Document the X abnormal options inherited from history.
	343	m4_divert_once([HELP_BEGIN], [
	344	X features:
	345	--x-includes=DIR X include files are in DIR
	346	--x-libraries=DIR X library files are in DIR])dnl
580e09f7	347	AC_MSG_CHECKING([for X])
194f742f	348
194f742f RD	349	AC_ARG_WITH(x, [ --with-x use the X Window System])
	350	# $have_x is `yes', `no', `disabled', or empty when we do not yet know.
	351	if test "x$with_x" = xno; then
	352	# The user explicitly disabled X.
	353	have_x=disabled
	354	else
580e09f7 DE	355	case $x_includes,$x_libraries in #(
	356	\') AC_MSG_ERROR([Cannot use X directory names containing ']);; #(
	357	,NONE \| NONE,) _AC_PATH_X;; #(
	358	*) have_x=yes;;
	359	esac
194f742f RD	360	eval "$ac_cv_have_x"
	361	fi # $with_x != no
	362
	363	if test "$have_x" != yes; then
	364	AC_MSG_RESULT([$have_x])
	365	no_x=yes
	366	else
	367	# If each of the values was on the command line, it overrides each guess.
	368	test "x$x_includes" = xNONE && x_includes=$ac_x_includes
	369	test "x$x_libraries" = xNONE && x_libraries=$ac_x_libraries
	370	# Update the cache value to reflect the command line values.
580e09f7 DE	371	ac_cv_have_x="have_x=yes\
	372	ac_x_includes='$x_includes'\
	373	ac_x_libraries='$x_libraries'"
	374	AC_MSG_RESULT([libraries $x_libraries, headers $x_includes])
194f742f	375	fi
580e09f7	376	])# AC_PATH_X
194f742f RD	377
	378
	379
	380	# AC_PATH_XTRA
	381	# ------------
	382	# Find additional X libraries, magic flags, etc.
	383	AC_DEFUN([AC_PATH_XTRA],
	384	[AC_REQUIRE([AC_PATH_X])dnl
	385	if test "$no_x" = yes; then
	386	# Not all programs may use this symbol, but it does not hurt to define it.
	387	AC_DEFINE([X_DISPLAY_MISSING], 1,
	388	[Define to 1 if the X Window System is missing or not being used.])
	389	X_CFLAGS= X_PRE_LIBS= X_LIBS= X_EXTRA_LIBS=
	390	else
	391	if test -n "$x_includes"; then
	392	X_CFLAGS="$X_CFLAGS -I$x_includes"
	393	fi
	394
	395	# It would also be nice to do this for all -L options, not just this one.
	396	if test -n "$x_libraries"; then
	397	X_LIBS="$X_LIBS -L$x_libraries"
194f742f RD	398	# For Solaris; some versions of Sun CC require a space after -R and
194f742f RD	399	# others require no space. Words are not sufficient . . . .
580e09f7 DE	400	AC_MSG_CHECKING([whether -R must be followed by a space])
	401	ac_xsave_LIBS=$LIBS; LIBS="$LIBS -R$x_libraries"
	402	ac_xsave_[]_AC_LANG_ABBREV[]_werror_flag=$ac_[]_AC_LANG_ABBREV[]_werror_flag
	403	ac_[]_AC_LANG_ABBREV[]_werror_flag=yes
	404	AC_LINK_IFELSE([AC_LANG_PROGRAM()],
	405	[AC_MSG_RESULT([no])
	406	X_LIBS="$X_LIBS -R$x_libraries"],
	407	[LIBS="$ac_xsave_LIBS -R $x_libraries"
	408	AC_LINK_IFELSE([AC_LANG_PROGRAM()],
	409	[AC_MSG_RESULT([yes])
	410	X_LIBS="$X_LIBS -R $x_libraries"],
	411	[AC_MSG_RESULT([neither works])])])
	412	ac_[]_AC_LANG_ABBREV[]_werror_flag=$ac_xsave_[]_AC_LANG_ABBREV[]_werror_flag
	413	LIBS=$ac_xsave_LIBS
194f742f RD	414	fi
	415
	416	# Check for system-dependent libraries X programs must link with.
	417	# Do this before checking for the system-independent R6 libraries
	418	# (-lICE), since we may need -lsocket or whatever for X linking.
	419
	420	if test "$ISC" = yes; then
	421	X_EXTRA_LIBS="$X_EXTRA_LIBS -lnsl_s -linet"
	422	else
	423	# Martyn Johnson says this is needed for Ultrix, if the X
	424	# libraries were built with DECnet support. And Karl Berry says
	425	# the Alpha needs dnet_stub (dnet does not exist).
	426	ac_xsave_LIBS="$LIBS"; LIBS="$LIBS $X_LIBS -lX11"
	427	AC_LINK_IFELSE([AC_LANG_CALL([], [XOpenDisplay])],
	428	[],
	429	[AC_CHECK_LIB(dnet, dnet_ntoa, [X_EXTRA_LIBS="$X_EXTRA_LIBS -ldnet"])
	430	if test $ac_cv_lib_dnet_dnet_ntoa = no; then
	431	AC_CHECK_LIB(dnet_stub, dnet_ntoa,
	432	[X_EXTRA_LIBS="$X_EXTRA_LIBS -ldnet_stub"])
	433	fi])
	434	LIBS="$ac_xsave_LIBS"
	435
	436	# msh@cis.ufl.edu says -lnsl (and -lsocket) are needed for his 386/AT,
	437	# to get the SysV transport functions.
	438	# Chad R. Larson says the Pyramis MIS-ES running DC/OSx (SVR4)
	439	# needs -lnsl.
	440	# The nsl library prevents programs from opening the X display
	441	# on Irix 5.2, according to T.E. Dickey.
	442	# The functions gethostbyname, getservbyname, and inet_addr are
	443	# in -lbsd on LynxOS 3.0.1/i386, according to Lars Hecking.
	444	AC_CHECK_FUNC(gethostbyname)
	445	if test $ac_cv_func_gethostbyname = no; then
	446	AC_CHECK_LIB(nsl, gethostbyname, X_EXTRA_LIBS="$X_EXTRA_LIBS -lnsl")
	447	if test $ac_cv_lib_nsl_gethostbyname = no; then
	448	AC_CHECK_LIB(bsd, gethostbyname, X_EXTRA_LIBS="$X_EXTRA_LIBS -lbsd")
	449	fi
	450	fi
	451
	452	# lieder@skyler.mavd.honeywell.com says without -lsocket,
	453	# socket/setsockopt and other routines are undefined under SCO ODT
	454	# 2.0. But -lsocket is broken on IRIX 5.2 (and is not necessary
	455	# on later versions), says Simon Leinen: it contains gethostby*
	456	# variants that don't use the name server (or something). -lsocket
	457	# must be given before -lnsl if both are needed. We assume that
	458	# if connect needs -lnsl, so does gethostbyname.
	459	AC_CHECK_FUNC(connect)
	460	if test $ac_cv_func_connect = no; then
	461	AC_CHECK_LIB(socket, connect, X_EXTRA_LIBS="-lsocket $X_EXTRA_LIBS", ,
	462	$X_EXTRA_LIBS)
	463	fi
	464
	465	# Guillermo Gomez says -lposix is necessary on A/UX.
	466	AC_CHECK_FUNC(remove)
	467	if test $ac_cv_func_remove = no; then
	468	AC_CHECK_LIB(posix, remove, X_EXTRA_LIBS="$X_EXTRA_LIBS -lposix")
	469	fi
	470
	471	# BSDI BSD/OS 2.1 needs -lipc for XOpenDisplay.
	472	AC_CHECK_FUNC(shmat)
	473	if test $ac_cv_func_shmat = no; then
	474	AC_CHECK_LIB(ipc, shmat, X_EXTRA_LIBS="$X_EXTRA_LIBS -lipc")
	475	fi
	476	fi
	477
478	# Check for libraries that X11R6 Xt/Xaw programs need.
479	ac_save_LDFLAGS=$LDFLAGS
480	test -n "$x_libraries" && LDFLAGS="$LDFLAGS -L$x_libraries"
481	# SM needs ICE to (dynamically) link under SunOS 4.x (so we have to
482	# check for ICE first), but we must link in the order -lSM -lICE or
483	# we get undefined symbols. So assume we have SM if we have ICE.
484	# These have to be linked with before -lX11, unlike the other
485	# libraries we check for below, so use a different variable.
486	# John Interrante, Karl Berry
487	AC_CHECK_LIB(ICE, IceConnectionNumber,
488	[X_PRE_LIBS="$X_PRE_LIBS -lSM -lICE"], , $X_EXTRA_LIBS)
489	LDFLAGS=$ac_save_LDFLAGS
490
491	fi
492	AC_SUBST(X_CFLAGS)dnl
493	AC_SUBST(X_PRE_LIBS)dnl
494	AC_SUBST(X_LIBS)dnl
495	AC_SUBST(X_EXTRA_LIBS)dnl
496	])# AC_PATH_XTRA