#! /bin/bash -norc
dnl	This file is an input file used by the GNU "autoconf" program to
dnl	generate the file "configure", which is run during Tk installation
dnl	to configure the system for the local environment.
AC_INIT(../generic/tk.h)
# RCS: @(#) $Id: configure.in,v 1.41 1999/08/10 23:16:42 redman Exp $

TK_VERSION=8.2
TK_MAJOR_VERSION=8
TK_MINOR_VERSION=2
TK_PATCH_LEVEL=".0"
VERSION=${TK_VERSION}

if test "${prefix}" = "NONE"; then
    prefix=/usr/local
fi
if test "${exec_prefix}" = "NONE"; then
    exec_prefix=$prefix
fi
TK_SRC_DIR=`cd $srcdir/..; pwd`

AC_PROG_RANLIB
SC_ENABLE_GCC
AC_PROG_CC

#------------------------------------------------------------------------
# I'm not sure why these need to come before all of the other tests
#------------------------------------------------------------------------

AC_HAVE_HEADERS(unistd.h limits.h)

#------------------------------------------------------------------------
# Threads support
#------------------------------------------------------------------------

SC_ENABLE_THREADS

#------------------------------------------------------------------------
# Set the warning flags depending on whether or not we are using gcc
#------------------------------------------------------------------------

if test "${GCC}" = "yes" ; then
    CFLAGS_WARNING="-Wall -Wconversion -Wno-implicit-int"
else
    CFLAGS_WARNING=""
fi

#------------------------------------------------------------------------------
# If we're using GCC, see if the compiler understands -pipe.  If so, use it.
# It makes compiling go faster.  (This is only a performance feature.)
#------------------------------------------------------------------------------

if test -z "$no_pipe"; then
if test -n "$GCC"; then
  AC_MSG_CHECKING([if the compiler understands -pipe])
  OLDCC="$CC"  
  CC="$CC -pipe"
  AC_TRY_COMPILE(,,
    AC_MSG_RESULT(yes),
    CC="$OLDCC"
    AC_MSG_RESULT(no))
fi  
fi

#--------------------------------------------------------------------
# Find and load the tclConfig.sh file
#--------------------------------------------------------------------

SC_PATH_TCLCONFIG
SC_LOAD_TCLCONFIG

#--------------------------------------------------------------------
# Recompute the necessary flags to run the compiler
#--------------------------------------------------------------------

SC_CONFIG_CFLAGS

SC_ENABLE_SYMBOLS

LIB_RUNTIME_DIR='${LIB_RUNTIME_DIR}'

CFLAGS=${CFLAGS_DEFAULT}
TK_DBGX=${DBGX}

#------------------------------------------------------------------------
# If Tcl and Tk are installed in different places, adjust the library
# search path to reflect this.
#------------------------------------------------------------------------

if test "$TCL_EXEC_PREFIX" != "$exec_prefix"; then
    LIB_RUNTIME_DIR="${LIB_RUNTIME_DIR}:${TCL_EXEC_PREFIX}/lib"
fi

#--------------------------------------------------------------------
# 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").
#--------------------------------------------------------------------

AC_CHECK_FUNC(sin, MATH_LIBS="", MATH_LIBS="-lm")
AC_CHECK_LIB(ieee, main, [MATH_LIBS="-lieee $MATH_LIBS"])

#--------------------------------------------------------------------
# On AIX systems, libbsd.a has to be linked in to support
# non-blocking file IO.  This library has to be linked in after
# the MATH_LIBS or it breaks the pow() function.  The way to
# insure proper sequencing, is to add it to the tail of MATH_LIBS.
# This library also supplies gettimeofday.
#--------------------------------------------------------------------
libbsd=no
if test "`uname -s`" = "AIX" ; then
    AC_CHECK_LIB(bsd, gettimeofday, libbsd=yes)
    if test $libbsd = yes; then
	MATH_LIBS="$MATH_LIBS -lbsd"
    fi
fi

#--------------------------------------------------------------------
# Supply a substitute for stdlib.h if it doesn't define strtol,
# strtoul, or strtod (which it doesn't in some versions of SunOS).
#--------------------------------------------------------------------

AC_MSG_CHECKING(stdlib.h)
AC_HEADER_EGREP(strtol, stdlib.h, tk_ok=yes, tk_ok=no)
AC_HEADER_EGREP(strtoul, stdlib.h, , tk_ok=no)
AC_HEADER_EGREP(strtod, stdlib.h, , tk_ok=no)
if test $tk_ok = no; then
    AC_DEFINE(NO_STDLIB_H)
fi
AC_MSG_RESULT($tk_ok)

#--------------------------------------------------------------------
# Include sys/select.h if it exists and if it supplies things
# that appear to be useful and aren't already in sys/types.h.
# This appears to be true only on the RS/6000 under AIX.  Some
# systems like OSF/1 have a sys/select.h that's of no use, and
# other systems like SCO UNIX have a sys/select.h that's
# pernicious.  If "fd_set" isn't defined anywhere then set a
# special flag.
#--------------------------------------------------------------------

AC_MSG_CHECKING([fd_set and sys/select])
AC_TRY_COMPILE([#include <sys/types.h>],
	[fd_set readMask, writeMask;], tk_ok=yes, tk_ok=no)
if test $tk_ok = no; then
    AC_HEADER_EGREP(fd_mask, sys/select.h, tk_ok=yes)
    if test $tk_ok = yes; then
	AC_DEFINE(HAVE_SYS_SELECT_H)
    fi
fi
AC_MSG_RESULT($tk_ok)
if test $tk_ok = no; then
    AC_DEFINE(NO_FD_SET)
fi

#--------------------------------------------------------------------
# Check for various typedefs and provide substitutes if
# they don't exist.
#--------------------------------------------------------------------

AC_TYPE_MODE_T
AC_TYPE_PID_T
AC_TYPE_SIZE_T
AC_TYPE_UID_T

#------------------------------------------------------------------------------
#       Find out about time handling differences.
#------------------------------------------------------------------------------

AC_CHECK_HEADERS(sys/time.h)
AC_HEADER_TIME

#-------------------------------------------
#     In OS/390 struct pwd has no pw_gecos field
#-------------------------------------------

AC_MSG_CHECKING([pw_gecos in struct pwd])
AC_TRY_COMPILE([#include <pwd.h>],
      [struct passwd pwd; pwd.pw_gecos;], tk_ok=yes, tk_ok=no)
AC_MSG_RESULT($tk_ok)
if test $tk_ok = yes; then
    AC_DEFINE(HAVE_PW_GECOS)
fi

#--------------------------------------------------------------------
#	Locate the X11 header files and the X11 library archive.  Try
#	the ac_path_x macro first, but if it doesn't find the X stuff
#	(e.g. because there's no xmkmf program) then check through
#	a list of possible directories.  Under some conditions the
#	autoconf macro will return an include directory that contains
#	no include files, so double-check its result just to be safe.
#--------------------------------------------------------------------

SC_PATH_X

#--------------------------------------------------------------------
#	Various manipulations on the search path used at runtime to
#	find shared libraries:
#	1. If the X library binaries are in a non-standard directory,
#	   add the X library location into that search path.
#	2. On systems such as AIX and Ultrix that use "-L" as the
#	   search path option, colons cannot be used to separate
#	   directories from each other. Change colons to " -L".
#	3. Create two sets of search flags, one for use in cc lines
#	   and the other for when the linker is invoked directly.  In
#	   the second case, '-Wl,' must be stripped off and commas must
#	   be replaced by spaces.
#--------------------------------------------------------------------

if test "x${x_libraries}" != "x"; then
    LIB_RUNTIME_DIR="${LIB_RUNTIME_DIR}:${x_libraries}"
fi
if test "${TCL_LD_SEARCH_FLAGS}" = '-L${LIB_RUNTIME_DIR}'; then
    LIB_RUNTIME_DIR=`echo ${LIB_RUNTIME_DIR} |sed -e 's/:/ -L/g'`
fi

# The statement below is very tricky!  It actually *evaluates* the
# string in TCL_LD_SEARCH_FLAGS, which causes a substitution of the
# variable LIB_RUNTIME_DIR.

eval "TK_CC_SEARCH_FLAGS=\"$TCL_LD_SEARCH_FLAGS\""

# The following case handles the differences between linking with "ld"
# and the compiler

case $SHLIB_LD in
    *ld*)
      TK_LD_SEARCH_FLAGS=`echo ${TK_CC_SEARCH_FLAGS} |sed -e "s|-Wl,||g" -e "s|,| |g"`
      ;;
    *)
      TK_LD_SEARCH_FLAGS="${TK_CC_SEARCH_FLAGS}"
      ;;
esac

#--------------------------------------------------------------------
#	Check for the existence of various libraries.  The order here
#	is important, so that then end up in the right order in the
#	command line generated by make.  The -lsocket and -lnsl libraries
#	require a couple of special tricks:
#	1. Use "connect" and "accept" to check for -lsocket, and
#	   "gethostbyname" to check for -lnsl.
#	2. Use each function name only once:  can't redo a check because
#	   autoconf caches the results of the last check and won't redo it.
#	3. Use -lnsl and -lsocket only if they supply procedures that
#	   aren't already present in the normal libraries.  This is because
#	   IRIX 5.2 has libraries, but they aren't needed and they're
#	   bogus:  they goof up name resolution if used.
#	4. On some SVR4 systems, can't use -lsocket without -lnsl too.
#	   To get around this problem, check for both libraries together
#	   if -lsocket doesn't work by itself.
#--------------------------------------------------------------------

AC_CHECK_LIB(Xbsd, main, [LIBS="$LIBS -lXbsd"])

tk_checkBoth=0
AC_CHECK_FUNC(connect, tk_checkSocket=0, tk_checkSocket=1)
if test "$tk_checkSocket" = 1; then
    AC_CHECK_LIB(socket, main, LIBS="$LIBS -lsocket", tk_checkBoth=1)
fi
if test "$tk_checkBoth" = 1; then
    tk_oldLibs=$LIBS
    LIBS="$LIBS -lsocket -lnsl"
    AC_CHECK_FUNC(accept, tk_checkNsl=0, [LIBS=$tk_oldLibs])
fi
AC_CHECK_FUNC(gethostbyname, , AC_CHECK_LIB(nsl, main, [LIBS="$LIBS -lnsl"]))

# Add the threads support libraries

LIBS="$LIBS$THREADS_LIBS"

#--------------------------------------------------------------------
# One more check related to the X libraries.  The standard releases
# of Ultrix don't support the "xauth" mechanism, so send won't work
# unless TK_NO_SECURITY is defined.  However, there are usually copies
# of the MIT X server available as well, which do support xauth.
# Check for the MIT stuff and use it if it exists.
#
# Note: can't use ac_check_lib macro (at least, not in Autoconf 2.1)
# because it can't deal with the "-" in the library name.
#--------------------------------------------------------------------

if test -d /usr/include/mit ; then
    AC_MSG_CHECKING([MIT X libraries])
    tk_oldCFlags=$CFLAGS
    CFLAGS="$CFLAGS -I/usr/include/mit"
    tk_oldLibs=$LIBS
    LIBS="$LIBS -lX11-mit"
    AC_TRY_LINK([
	#include <X11/Xlib.h>
    ], [
	XOpenDisplay(0);
    ], [
	AC_MSG_RESULT(yes)
	XLIBSW="-lX11-mit"
	XINCLUDES="-I/usr/include/mit"
    ], AC_MSG_RESULT(no))
    CFLAGS=$tk_oldCFlags
    LIBS=$tk_oldLibs
fi

#--------------------------------------------------------------------
#	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").
#--------------------------------------------------------------------

MATH_LIBS=""
AC_CHECK_FUNC(sin, , MATH_LIBS="-lm")
AC_CHECK_LIB(ieee, main, [MATH_LIBS="-lieee $MATH_LIBS"])

#--------------------------------------------------------------------
#	Figure out whether "char" is unsigned.  If so, set a
#	#define for __CHAR_UNSIGNED__.
#--------------------------------------------------------------------

AC_C_CHAR_UNSIGNED

#--------------------------------------------------------------------
#	Under Solaris 2.4, strtod returns the wrong value for the
#	terminating character under some conditions.  Check for this
#	and if the problem exists use a substitute procedure
#	"fixstrtod" (provided by Tcl) that corrects the error.
#--------------------------------------------------------------------

SC_BUGGY_STRTOD

#--------------------------------------------------------------------
#	The statements below define a collection of symbols related to
#	building libtk as a shared library instead of a static library.
#--------------------------------------------------------------------

SC_ENABLE_SHARED

eval eval "TK_SHARED_LIB_SUFFIX=${SHARED_LIB_SUFFIX}"
eval eval "TK_UNSHARED_LIB_SUFFIX=${UNSHARED_LIB_SUFFIX}"

TCL_LIB_SPEC='-L$(TCL_BIN_DIR) $(TCL_LIB_FLAG)'
TCL_STUB_LIB_SPEC='-L$(TCL_BIN_DIR) $(TCL_STUB_LIB_FLAG)'

if test "${SHARED_BUILD}" = "1" -a "${SHLIB_SUFFIX}" != ""; then
    TK_SHLIB_CFLAGS="${SHLIB_CFLAGS}"
    TK_LIB_FILE=libtk${TK_SHARED_LIB_SUFFIX}
    MAKE_LIB="\${SHLIB_LD} -o \${TK_LIB_FILE} \${OBJS} \$(TK_LD_SEARCH_FLAGS) ${TCL_STUB_LIB_SPEC} \${LIBS}"
    RANLIB=":"

#    TCL_STUB_FLAGS="-DUSE_TCL_STUBS"
    TCL_STUB_FLAGS=""
else
    TK_SHLIB_CFLAGS=""
    TK_LIB_FILE=libtk${TK_UNSHARED_LIB_SUFFIX}
    MAKE_LIB="ar cr \${TK_LIB_FILE} \${OBJS}"

    TCL_STUB_FLAGS=""
fi

eval "TK_LIB_FILE=${TK_LIB_FILE}"

# Note:  in the following variable, it's important to use the absolute
# path name of the Tcl directory rather than "..":  this is because
# AIX remembers this path and will attempt to use it at run-time to look
# up the Tcl library.

if test "$SHARED_BUILD" = 0 -o $TCL_NEEDS_EXP_FILE = 0; then
    if test "${TCL_LIB_VERSIONS_OK}" = "ok"; then
	eval TK_LIB_FLAG="-ltk${VERSION}\${TK_DBGX}"
    else
	eval TK_LIB_FLAG="-ltk`echo ${VERSION} | tr -d .`\${TK_DBGX}"
    fi
    TK_BUILD_LIB_SPEC="-L`pwd` ${TK_LIB_FLAG}"
    TK_LIB_SPEC="-L${exec_prefix}/lib ${TK_LIB_FLAG}"
    TK_BUILD_EXP_FILE=""
    TK_EXP_FILE=""
else
    TK_BUILD_EXP_FILE="lib.exp"
    eval "TK_EXP_FILE=libtk${TCL_EXPORT_FILE_SUFFIX}"
    
    TK_BUILD_LIB_SPEC="-bI:`pwd`/${TK_BUILD_EXP_FILE}"
    TK_LIB_SPEC="-bI:${exec_prefix}/lib/${TK_EXP_FILE}"
fi

#--------------------------------------------------------------------
# The statements below define various symbols relating to creating
# the stub'd version of the Tk library
#
# For now, linking to Tcl stubs is not supported with Tk. It causes
# too many problems with linking.  When Tk is a fully loadable 
# extension, linking the the Tcl stubs will be supported.
#--------------------------------------------------------------------

# Replace ${VERSION} with contents of ${TK_VERSION}
eval "STUB_LIB_FILE=libtkstub${TK_UNSHARED_LIB_SUFFIX}"

MAKE_STUB_LIB="ar cr \${STUB_LIB_FILE} \${STUB_LIB_OBJS}"

TK_STUB_LIB_FILE=${STUB_LIB_FILE}

if test "${TCL_LIB_VERSIONS_OK}" = "ok"; then
    eval TK_STUB_LIB_FLAG="-ltkstub${TK_VERSION}\${TK_DBGX}"
else
    eval TK_STUB_LIB_FLAG="-ltkstub`echo ${TK_VERSION} | tr -d .`\${TK_DBGX}"
fi

TK_BUILD_STUB_LIB_SPEC="-L`pwd` ${TK_STUB_LIB_FLAG}"
TK_STUB_LIB_SPEC="-L${exec_prefix}/lib ${TK_STUB_LIB_FLAG}"
TK_BUILD_STUB_LIB_PATH="`pwd`/${TK_STUB_LIB_FILE}"
TK_STUB_LIB_PATH="${exec_prefix}/lib/${TK_STUB_LIB_FILE}"

AC_SUBST(STUB_LIB_FILE)

AC_SUBST(TK_STUB_LIB_FILE)
AC_SUBST(TK_STUB_LIB_FLAG)
AC_SUBST(TK_BUILD_STUB_LIB_SPEC)
AC_SUBST(TK_STUB_LIB_SPEC)
AC_SUBST(TK_BUILD_STUB_LIB_PATH)
AC_SUBST(TK_STUB_LIB_PATH)
AC_SUBST(MAKE_STUB_LIB)
AC_SUBST(TK_STUB_FLAGS)
AC_SUBST(TK_BUILD_EXP_FILE)
AC_SUBST(TK_EXP_FILE)

eval "TK_LIB_FILE=${TK_LIB_FILE}"

AC_SUBST(TCL_STUB_FLAGS)
AC_SUBST(TK_BUILD_EXP_FILE)
AC_SUBST(TK_EXP_FILE)

AC_SUBST(CFLAGS_DEBUG)
AC_SUBST(CFLAGS_DEFAULT)
AC_SUBST(CFLAGS_OPTIMIZE)
AC_SUBST(CFLAGS_WARNING)
AC_SUBST(TK_DBGX)
AC_SUBST(DL_LIBS)
AC_SUBST(EXTRA_CFLAGS)
AC_SUBST(LD_FLAGS)
AC_SUBST(MATH_LIBS)
AC_SUBST(MAKE_LIB)
AC_SUBST(SHLIB_CFLAGS)
AC_SUBST(TK_SHLIB_CFLAGS)
AC_SUBST(SHLIB_LD)
AC_SUBST(SHLIB_LD_LIBS)
AC_SUBST(SHLIB_SUFFIX)
AC_SUBST(SHLIB_VERSION)
AC_SUBST(TCL_BIN_DIR)
AC_SUBST(TCL_LIB_SPEC)
AC_SUBST(TCL_LIB_FLAG)
#AC_SUBST(TCL_BUILD_STUB_LIB_SPEC)
#AC_SUBST(TCL_BUILD_LIB_SPEC)
AC_SUBST(TCL_DBGX)
AC_SUBST(TCL_LIB_FLAG)
AC_SUBST(TCL_SRC_DIR)
AC_SUBST(TCL_VERSION)
AC_SUBST(TK_BUILD_LIB_SPEC)
AC_SUBST(TK_CC_SEARCH_FLAGS)
AC_SUBST(TK_LD_SEARCH_FLAGS)
AC_SUBST(TK_LIB_FILE)
AC_SUBST(TK_LIB_FLAG)
AC_SUBST(TK_LIB_SPEC)
AC_SUBST(TK_MAJOR_VERSION)
AC_SUBST(TK_MINOR_VERSION)
AC_SUBST(TK_PATCH_LEVEL)
AC_SUBST(TK_SRC_DIR)
AC_SUBST(TK_VERSION)
AC_SUBST(XINCLUDES)
AC_SUBST(XLIBSW)
AC_SUBST(TK_SHARED_BUILD)

AC_OUTPUT(Makefile tkConfig.sh)
