[binutils.git] / config-ml.in

# Configure fragment invoked in the post-target section for subdirs
# wanting multilib support.
#
# It is advisable to support a few --enable/--disable options to let the
# user select which libraries s/he really wants.
#
# Subdirectories wishing to use multilib should put the following lines
# in the "post-target" section of configure.in.
#
# if [ "${srcdir}" = "." ] ; then
#   if [ "${with_target_subdir}" != "." ] ; then
#     . ${with_multisrctop}../../config-ml.in
#   else
#     . ${with_multisrctop}../config-ml.in
#   fi
# else
#   . ${srcdir}/../config-ml.in
# fi
#
# See librx/configure.in in the libg++ distribution for an example of how
# to handle autoconf'd libraries.
#
# Things are complicated because 6 separate cases must be handled:
# 2 (native, cross) x 3 (absolute-path, relative-not-dot, dot) = 6.
#
# srcdir=. is special.  It must handle make programs that don't handle VPATH.
# To implement this, a symlink tree is built for each library and for each
# multilib subdir.
#
# The build tree is layed out as
#
# ./
#   libg++
#   newlib
#   m68020/
#          libg++
#          newlib
#          m68881/
#                 libg++
#                 newlib
#
# The nice feature about this arrangement is that inter-library references
# in the build tree work without having to care where you are.  Note that
# inter-library references also work in the source tree because symlink trees
# are built when srcdir=.
#
# Unfortunately, trying to access the libraries in the build tree requires
# the user to manually choose which library to use as GCC won't be able to
# find the right one.  This is viewed as the lesser of two evils.
#
# Configure variables:
# ${with_target_subdir} = "." for native, or ${target_alias} for cross.
# Set by top level Makefile.
# ${with_multisrctop} = how many levels of multilibs there are in the source
# tree.  It exists to handle the case of configuring in the source tree:
# ${srcdir} is not constant.
# ${with_multisubdir} = name of multilib subdirectory (eg: m68020/m68881).
#
# Makefile variables:
# MULTISRCTOP = number of multilib levels in source tree (+1 if cross)
# (FIXME: note that this is different than ${with_multisrctop}.  Check out.).
# MULTIBUILDTOP = number of multilib levels in build tree
# MULTIDIRS = list of multilib subdirs (eg: m68000 m68020 ...)
# (only defined in each library's main Makefile).
# MULTISUBDIR = installed subdirectory name with leading '/' (eg: /m68000)
# (only defined in each multilib subdir).

# FIXME: Multilib is currently disabled by default for everything other than
# newlib.  It is up to each target to turn on multilib support for the other
# libraries as desired.

# We have to handle being invoked by both Cygnus configure and Autoconf.
#
# Cygnus configure incoming variables:
# srcdir, subdir, host, arguments
#
# Autoconf incoming variables:
# srcdir, host, ac_configure_args
#
# We *could* figure srcdir and host out, but we'd have to do work that
# our caller has already done to figure them out and requiring these two
# seems reasonable.
# Note that `host' in this case is GCC's `target'.  Target libraries are
# configured for a particular host.

if [ -n "${ac_configure_args}" ]; then
  Makefile=${ac_file-Makefile}
  ml_config_shell=${CONFIG_SHELL-/bin/sh}
  ml_arguments="${ac_configure_args}"
  ml_realsrcdir=${srcdir}
else
  Makefile=${Makefile-Makefile}
  ml_config_shell=${config_shell-/bin/sh}
  ml_arguments="${arguments}"
  if [ -n "${subdir}" -a "${subdir}" != "." ] ; then
    ml_realsrcdir=${srcdir}/${subdir}
  else
    ml_realsrcdir=${srcdir}
  fi
fi

# Scan all the arguments and set all the ones we need.

ml_verbose=--verbose
for option in ${ml_arguments}
do
  case $option in
  --*) ;;
  -*) option=-$option ;;
  esac

  case $option in
  --*=*)
	optarg=`echo $option | sed -e 's/^[^=]*=//'`
	;;
  esac

  case $option in
  --disable-*)
	enableopt=`echo ${option} | sed 's:^--disable-:enable_:;s:-:_:g'`
	eval $enableopt=no
	;;
  --enable-*)
	case "$option" in
	*=*)	;;
	*)	optarg=yes ;;
	esac
	enableopt=`echo ${option} | sed 's:^--::;s:=.*$::;s:-:_:g'`
	eval $enableopt="$optarg"
	;;
  --norecursion | --no*)
	ml_norecursion=yes
	;;
  --silent | --sil* | --quiet | --q*)
	ml_verbose=--silent
	;;
  --verbose | --v | --verb*)
	ml_verbose=--verbose
	;;
  --with-*)
	case "$option" in
	*=*)	;;
	*)	optarg=yes ;;
	esac
	withopt=`echo ${option} | sed 's:^--::;s:=.*$::;s:-:_:g'`
	eval $withopt="$optarg"
	;;
  --without-*)
	withopt=`echo ${option} | sed 's:^--::;s:out::;s:-:_:g'`
	eval $withopt=no
	;;
  esac
done

# Only do this if --enable-multilib.
if [ "${enable_multilib}" = yes ]; then

# Compute whether this is the library's top level directory
# (ie: not a multilib subdirectory, and not a subdirectory like libg++/src).
# ${with_multisubdir} tells us we're in the right branch, but we could be
# in a subdir of that.
# ??? The previous version could void this test by separating the process into
# two files: one that only the library's toplevel configure.in ran (to
# configure the multilib subdirs), and another that all configure.in's ran to
# update the Makefile.  It seemed reasonable to collapse all multilib support
# into one file, but it does leave us with having to perform this test.
ml_toplevel_p=no
if [ -z "${with_multisubdir}" ]; then
  if [ "${srcdir}" = "." ]; then
    # Use ${ml_realsrcdir} instead of ${srcdir} here to account for ${subdir}.
    # ${with_target_subdir} = "." for native, otherwise target alias.
    if [ "${with_target_subdir}" = "." ]; then
      if [ -f ${ml_realsrcdir}/../config-ml.in ]; then
	ml_toplevel_p=yes
      fi
    else
      if [ -f ${ml_realsrcdir}/../../config-ml.in ]; then
	ml_toplevel_p=yes
      fi
    fi
  else
    # Use ${ml_realsrcdir} instead of ${srcdir} here to account for ${subdir}.
    if [ -f ${ml_realsrcdir}/../config-ml.in ]; then
      ml_toplevel_p=yes
    fi
  fi
fi

# If this is the library's top level directory, set multidirs to the
# multilib subdirs to support.  This lives at the top because we need
# `multidirs' set right away.

if [ "${ml_toplevel_p}" = yes ]; then

multidirs=
for i in `${CC-gcc} --print-multi-lib 2>/dev/null`; do
  dir=`echo $i | sed -e 's/;.*$//'`
  if [ "${dir}" = "." ]; then
    true
  else
    if [ -z "${multidirs}" ]; then
      multidirs="${dir}"
    else
      multidirs="${multidirs} ${dir}"
    fi
  fi
done

# Target libraries are configured for the host they run on, so we check
# $host here, not $target.

case "${host}" in
arc-*-elf*)
	if [ x$enable_biendian != xyes ]
	then
	  old_multidirs=${multidirs}
	  multidirs=""
	  for x in ${old_multidirs}; do
	    case "${x}" in
	      *be*) : ;;
	      *) multidirs="${multidirs} ${x}" ;;
	    esac
	  done
	fi
	;;
arm-*-*)
	if [ x"$enable_fpu" = xno ]
	then
	  old_multidirs=${multidirs}
	  multidirs=""
	  for x in ${old_multidirs}; do
	    case "${x}" in
	      *fpu*) : ;;
	      *) multidirs="${multidirs} ${x}" ;;
	    esac
	  done
	fi
	if [ x"$enable_26bit" = xno ]
	then
	  old_multidirs=${multidirs}
	  multidirs=""
	  for x in ${old_multidirs}; do
	    case "${x}" in
	      *26bit*) : ;;
	      *) multidirs="${multidirs} ${x}" ;;
	    esac
	  done
	fi
	if [ x"$enable_underscore" = xno ]
	then
	  old_multidirs=${multidirs}
	  multidirs=""
	  for x in ${old_multidirs}; do
	    case "${x}" in
	      *under*) : ;;
	      *) multidirs="${multidirs} ${x}" ;;
	    esac
	  done
	fi
	if [ x"$enable_interwork" = xno ]
	then
	  old_multidirs=${multidirs}
	  multidirs=""
	  for x in ${old_multidirs}; do
	    case "${x}" in
	      *interwork*) : ;;
	      *) multidirs="${multidirs} ${x}" ;;
	    esac
	  done
	fi
	if [ x$enable_biendian = xno ]
	then
	  old_multidirs="${multidirs}"
	  multidirs=""
	  for x in ${old_multidirs}; do
	    case "$x" in
	      *le* ) : ;;
	      *be* ) : ;;
	      *) multidirs="${multidirs} ${x}" ;;
	    esac
	  done
	fi
	;;
m68*-*-*)
	if [ x$enable_softfloat = xno ]
	then
	  old_multidirs="${multidirs}"
	  multidirs=""
	  for x in ${old_multidirs}; do
	    case "$x" in
	      *soft-float* ) : ;;
	      *) multidirs="${multidirs} ${x}" ;;
	    esac
	  done
	fi
	if [ x$enable_m68881 = xno ]
	then
	  old_multidirs="${multidirs}"
	  multidirs=""
	  for x in ${old_multidirs}; do
	    case "$x" in
	      *m68881* ) : ;;
	      *) multidirs="${multidirs} ${x}" ;;
	    esac
	  done
	fi
	if [ x$enable_m68000 = xno ]
	then
	  old_multidirs="${multidirs}"
	  multidirs=""
	  for x in ${old_multidirs}; do
	    case "$x" in
	      *m68000* ) : ;;
	      *) multidirs="${multidirs} ${x}" ;;
	    esac
	  done
	fi
	if [ x$enable_m68020 = xno ]
	then
	  old_multidirs="${multidirs}"
	  multidirs=""
	  for x in ${old_multidirs}; do
	    case "$x" in
	      *m68020* ) : ;;
	      *) multidirs="${multidirs} ${x}" ;;
	    esac
	  done
	fi
	;;
mips*-*-*)
	if [ x$enable_single_float = xno ]
	then
	  old_multidirs="${multidirs}"
	  multidirs=""
	  for x in ${old_multidirs}; do
	    case "$x" in
	      *single* ) : ;;
	      *) multidirs="${multidirs} ${x}" ;;
	    esac
	  done
	fi
	if [ x$enable_biendian = xno ]
	then
	  old_multidirs="${multidirs}"
	  multidirs=""
	  for x in ${old_multidirs}; do
	    case "$x" in
	      *el* ) : ;;
	      *eb* ) : ;;
	      *) multidirs="${multidirs} ${x}" ;;
	    esac
	  done
	fi
	if [ x$enable_softfloat = xno ]
	then
	  old_multidirs="${multidirs}"
	  multidirs=""
	  for x in ${old_multidirs}; do
	    case "$x" in
	      *soft-float* ) : ;;
	      *) multidirs="${multidirs} ${x}" ;;
	    esac
	  done
	fi
	;;
powerpc*-*-* | rs6000*-*-*)
	if [ x$enable_softfloat = xno ]
	then
	  old_multidirs="${multidirs}"
	  multidirs=""
	  for x in ${old_multidirs}; do
	    case "$x" in
	      *soft-float* ) : ;;
	      *) multidirs="${multidirs} ${x}" ;;
	    esac
	  done
	fi
	if [ x$enable_powercpu = xno ]
	then
	  old_multidirs="${multidirs}"
	  multidirs=""
	  for x in ${old_multidirs}; do
	    case "$x" in
	      power | */power | */power/* ) : ;;
	      *) multidirs="${multidirs} ${x}" ;;
	    esac
	  done
	fi
	if [ x$enable_powerpccpu = xno ]
	then
	  old_multidirs="${multidirs}"
	  multidirs=""
	  for x in ${old_multidirs}; do
	    case "$x" in
	      *powerpc* ) : ;;
	      *) multidirs="${multidirs} ${x}" ;;
	    esac
	  done
	fi
	if [ x$enable_powerpcos = xno ]
	then
	  old_multidirs="${multidirs}"
	  multidirs=""
	  for x in ${old_multidirs}; do
	    case "$x" in
	      *mcall-linux* | *mcall-solaris* ) : ;;
	      *) multidirs="${multidirs} ${x}" ;;
	    esac
	  done
	fi
	if [ x$enable_biendian = xno ]
	then
	  old_multidirs="${multidirs}"
	  multidirs=""
	  for x in ${old_multidirs}; do
	    case "$x" in
	      *mlittle* | *mbig* ) : ;;
	      *) multidirs="${multidirs} ${x}" ;;
	    esac
	  done
	fi
	if [ x$enable_sysv = xno ]
	then
	  old_multidirs="${multidirs}"
	  multidirs=""
	  for x in ${old_multidirs}; do
	    case "$x" in
	      *mcall-sysv* ) : ;;
	      *) multidirs="${multidirs} ${x}" ;;
	    esac
	  done
	fi
	if [ x$enable_aix = xno ]
	then
	  old_multidirs="${multidirs}"
	  multidirs=""
	  for x in ${old_multidirs}; do
	    case "$x" in
	      *mcall-aix* ) : ;;
	      *) multidirs="${multidirs} ${x}" ;;
	    esac
	  done
	fi
	;;
esac

# Remove extraneous blanks from multidirs.
# Tests like `if [ -n "$multidirs" ]' require it.
multidirs=`echo "$multidirs" | sed -e 's/^[ ][ ]*//' -e 's/[ ][ ]*$//' -e 's/[ ][ ]*/ /g'`

# Add code to library's top level makefile to handle building the multilib
# subdirs.

cat > Multi.tem <<\EOF

# FIXME: There should be an @-sign in front of the `if'.
# Leave out until this is tested a bit more.
multi-do:
	if [ -z "$(MULTIDIRS)" ]; then \
	  true; \
	else \
	  rootpre=`pwd`/; export rootpre; \
	  srcrootpre=`cd $(srcdir); pwd`/; export srcrootpre; \
	  lib=`echo $${rootpre} | sed -e 's,^.*/\([^/][^/]*\)/$$,\1,'`; \
	  compiler="$(CC)"; \
	  for i in `$${compiler} --print-multi-lib 2>/dev/null`; do \
	    dir=`echo $$i | sed -e 's/;.*$$//'`; \
	    if [ "$${dir}" = "." ]; then \
	      true; \
	    else \
	      if [ -d ../$${dir}/$${lib} ]; then \
		flags=`echo $$i | sed -e 's/^[^;]*;//' -e 's/@/ -/g'`; \
		if (cd ../$${dir}/$${lib}; $(MAKE) $(FLAGS_TO_PASS) \
				CFLAGS="$(CFLAGS) $${flags}" \
				CXXFLAGS="$(CXXFLAGS) $${flags}" \
				LIBCFLAGS="$(LIBCFLAGS) $${flags}" \
				LIBCXXFLAGS="$(LIBCXXFLAGS) $${flags}" \
				LDFLAGS="$(LDFLAGS) $${flags}" \
				$(DO)); then \
		  true; \
		else \
		  exit 1; \
		fi; \
	      else true; \
	      fi; \
	    fi; \
	  done; \
	fi

# FIXME: There should be an @-sign in front of the `if'.
# Leave out until this is tested a bit more.
multi-clean:
	if [ -z "$(MULTIDIRS)" ]; then \
	  true; \
	else \
	  lib=`pwd | sed -e 's,^.*/\([^/][^/]*\)$$,\1,'`; \
	  for dir in Makefile $(MULTIDIRS); do \
	    if [ -f ../$${dir}/$${lib}/Makefile ]; then \
	      if (cd ../$${dir}/$${lib}; $(MAKE) $(FLAGS_TO_PASS) $(DO)); \
	      then true; \
	      else exit 1; \
	      fi; \
	    else true; \
	    fi; \
	  done; \
	fi
EOF

cat ${Makefile} Multi.tem > Makefile.tem
rm -f ${Makefile} Multi.tem
mv Makefile.tem ${Makefile}

fi # ${ml_toplevel_p} = yes

if [ "${ml_verbose}" = --verbose ]; then
  echo "Adding multilib support to Makefile in ${ml_realsrcdir}"
  if [ "${ml_toplevel_p}" = yes ]; then
    echo "multidirs=${multidirs}"
  fi
  echo "with_multisubdir=${with_multisubdir}"
fi

if [ "${srcdir}" = "." ]; then
  if [ "${with_target_subdir}" != "." ]; then
    ml_srcdotdot="../"
  else
    ml_srcdotdot=""
  fi
else
  ml_srcdotdot=""
fi

if [ -z "${with_multisubdir}" ]; then
  ml_subdir=
  ml_builddotdot=
  : # ml_srcdotdot= # already set
else
  ml_subdir="/${with_multisubdir}"
  # The '[^/][^/]*' appears that way to work around a SunOS sed bug.
  ml_builddotdot=`echo ${with_multisubdir} | sed -e 's:[^/][^/]*:..:g'`/
  if [ "$srcdir" = "." ]; then
    ml_srcdotdot=${ml_srcdotdot}${ml_builddotdot}
  else
    : # ml_srcdotdot= # already set
  fi
fi

if [ "${ml_toplevel_p}" = yes ]; then
  ml_do='$(MAKE)'
  ml_clean='$(MAKE)'
else
  ml_do=true
  ml_clean=true
fi

# TOP is used by newlib and should not be used elsewhere for this purpose.
# MULTI{SRC,BUILD}TOP are the proper ones to use.  MULTISRCTOP is empty
# when srcdir != builddir.  MULTIBUILDTOP is always some number of ../'s.
# FIXME: newlib needs to be updated to use MULTI{SRC,BUILD}TOP so we can
# delete TOP.  Newlib may wish to continue to use TOP for its own purposes
# of course.
# MULTIDIRS is non-empty for the cpu top level Makefile (eg: newlib/Makefile)
# and lists the subdirectories to recurse into.
# MULTISUBDIR is non-empty in each cpu subdirectory's Makefile
# (eg: newlib/h8300h/Makefile) and is the installed subdirectory name with
# a leading '/'.
# MULTIDO is used for targets like all, install, and check where
# $(FLAGS_TO_PASS) augmented with the subdir's compiler option is needed.
# MULTICLEAN is used for the *clean targets.
#
# ??? It is possible to merge MULTIDO and MULTICLEAN into one.  They are
# currently kept separate because we don't want the *clean targets to require
# the existence of the compiler (which MULTIDO currently requires) and
# therefore we'd have to record the directory options as well as names
# (currently we just record the names and use --print-multi-lib to get the
# options).

sed -e "s:^TOP[ 	]*=[ 	]*\([./]*\)[ 	]*$:TOP = ${ml_builddotdot}\1:" \
    -e "s:^MULTISRCTOP[ 	]*=.*$:MULTISRCTOP = ${ml_srcdotdot}:" \
    -e "s:^MULTIBUILDTOP[ 	]*=.*$:MULTIBUILDTOP = ${ml_builddotdot}:" \
    -e "s:^MULTIDIRS[ 	]*=.*$:MULTIDIRS = ${multidirs}:" \
    -e "s:^MULTISUBDIR[ 	]*=.*$:MULTISUBDIR = ${ml_subdir}:" \
    -e "s:^MULTIDO[ 	]*=.*$:MULTIDO = $ml_do:" \
    -e "s:^MULTICLEAN[ 	]*=.*$:MULTICLEAN = $ml_clean:" \
	${Makefile} > Makefile.tem
rm -f ${Makefile}
mv Makefile.tem ${Makefile}

# If this is the library's top level, configure each multilib subdir.
# This is done at the end because this is the loop that runs configure
# in each multilib subdir and it seemed reasonable to finish updating the
# Makefile before going on to configure the subdirs.

if [ "${ml_toplevel_p}" = yes ]; then

# We must freshly configure each subdirectory.  This bit of code is
# actually partially stolen from the main configure script.  FIXME.

if [ -n "${multidirs}" ] && [ -z "${ml_norecursion}" ]; then

  if [ "${ml_verbose}" = --verbose ]; then
    echo "Running configure in multilib subdirs ${multidirs}"
    echo "pwd: `pwd`"
  fi

  ml_origdir=`pwd`
  ml_libdir=`echo $ml_origdir | sed -e 's,^.*/,,'`
  # cd to top-level-build-dir/${with_target_subdir}
  cd ..

  for ml_dir in ${multidirs}; do

    if [ "${ml_verbose}" = --verbose ]; then
      echo "Running configure in multilib subdir ${ml_dir}"
      echo "pwd: `pwd`"
    fi

    if [ -d ${ml_dir} ]; then true; else mkdir ${ml_dir}; fi
    if [ -d ${ml_dir}/${ml_libdir} ]; then true; else mkdir ${ml_dir}/${ml_libdir}; fi

    # Eg: if ${ml_dir} = m68000/m68881, dotdot = ../../
    dotdot=../`echo ${ml_dir} | sed -e 's|[^/]||g' -e 's|/|../|g'`

    case ${srcdir} in
    ".")
      echo Building symlink tree in `pwd`/${ml_dir}/${ml_libdir}
      if [ "${with_target_subdir}" != "." ]; then
	ml_unsubdir="../"
      else
	ml_unsubdir=""
      fi
      (cd ${ml_dir}/${ml_libdir};
       ../${dotdot}${ml_unsubdir}symlink-tree ../${dotdot}${ml_unsubdir}${ml_libdir} "")
      if [ -f ${ml_dir}/${ml_libdir}/Makefile ]; then
	if [ x"${MAKE}" = x ]; then
	  (cd ${ml_dir}/${ml_libdir}; make distclean)
	else
	  (cd ${ml_dir}/${ml_libdir}; ${MAKE} distclean)
	fi
      fi
      ml_newsrcdir="."
      ml_srcdiroption=
      multisrctop=${dotdot}
      ;;
    *)
      case "${srcdir}" in
      /*) # absolute path
        ml_newsrcdir=${srcdir}
        ;;
      *) # otherwise relative
        ml_newsrcdir=${dotdot}${srcdir}
        ;;
      esac
      ml_srcdiroption="-srcdir=${ml_newsrcdir}"
      multisrctop=
      ;;
    esac

    case "${progname}" in
    /*)     ml_recprog=${progname} ;;
    *)      ml_recprog=${dotdot}${progname} ;;
    esac

    # FIXME: POPDIR=${PWD=`pwd`} doesn't work here.
    ML_POPDIR=`pwd`
    cd ${ml_dir}/${ml_libdir}

    if [ -f ${ml_newsrcdir}/configure ]; then
      ml_recprog=${ml_newsrcdir}/configure
    fi
    if eval ${ml_config_shell} ${ml_recprog} \
	--with-multisubdir=${ml_dir} --with-multisrctop=${multisrctop} \
	${ml_arguments} ${ml_srcdiroption} ; then
      true
    else
      exit 1
    fi

    cd ${ML_POPDIR}

  done

  cd ${ml_origdir}
fi

fi # ${ml_toplevel_p} = yes
fi # ${enable_multilib} = yes
Commit	Line	Data
252b5132 RH	1	# Configure fragment invoked in the post-target section for subdirs
	2	# wanting multilib support.
	3	#
	4	# It is advisable to support a few --enable/--disable options to let the
	5	# user select which libraries s/he really wants.
	6	#
	7	# Subdirectories wishing to use multilib should put the following lines
	8	# in the "post-target" section of configure.in.
	9	#
	10	# if [ "${srcdir}" = "." ] ; then
	11	# if [ "${with_target_subdir}" != "." ] ; then
	12	# . ${with_multisrctop}../../config-ml.in
	13	# else
	14	# . ${with_multisrctop}../config-ml.in
	15	# fi
	16	# else
	17	# . ${srcdir}/../config-ml.in
	18	# fi
	19	#
	20	# See librx/configure.in in the libg++ distribution for an example of how
	21	# to handle autoconf'd libraries.
	22	#
	23	# Things are complicated because 6 separate cases must be handled:
	24	# 2 (native, cross) x 3 (absolute-path, relative-not-dot, dot) = 6.
	25	#
	26	# srcdir=. is special. It must handle make programs that don't handle VPATH.
	27	# To implement this, a symlink tree is built for each library and for each
	28	# multilib subdir.
	29	#
	30	# The build tree is layed out as
	31	#
	32	# ./
	33	# libg++
	34	# newlib
	35	# m68020/
	36	# libg++
	37	# newlib
	38	# m68881/
	39	# libg++
	40	# newlib
	41	#
	42	# The nice feature about this arrangement is that inter-library references
	43	# in the build tree work without having to care where you are. Note that
	44	# inter-library references also work in the source tree because symlink trees
	45	# are built when srcdir=.
	46	#
	47	# Unfortunately, trying to access the libraries in the build tree requires
	48	# the user to manually choose which library to use as GCC won't be able to
	49	# find the right one. This is viewed as the lesser of two evils.
	50	#
	51	# Configure variables:
	52	# ${with_target_subdir} = "." for native, or ${target_alias} for cross.
	53	# Set by top level Makefile.
	54	# ${with_multisrctop} = how many levels of multilibs there are in the source
	55	# tree. It exists to handle the case of configuring in the source tree:
	56	# ${srcdir} is not constant.
	57	# ${with_multisubdir} = name of multilib subdirectory (eg: m68020/m68881).
	58	#
	59	# Makefile variables:
	60	# MULTISRCTOP = number of multilib levels in source tree (+1 if cross)
	61	# (FIXME: note that this is different than ${with_multisrctop}. Check out.).
	62	# MULTIBUILDTOP = number of multilib levels in build tree
	63	# MULTIDIRS = list of multilib subdirs (eg: m68000 m68020 ...)
	64	# (only defined in each library's main Makefile).
65	# MULTISUBDIR = installed subdirectory name with leading '/' (eg: /m68000)
66	# (only defined in each multilib subdir).
67
68	# FIXME: Multilib is currently disabled by default for everything other than
69	# newlib. It is up to each target to turn on multilib support for the other
70	# libraries as desired.
71
72	# We have to handle being invoked by both Cygnus configure and Autoconf.
73	#
74	# Cygnus configure incoming variables:
75	# srcdir, subdir, host, arguments
76	#
77	# Autoconf incoming variables:
78	# srcdir, host, ac_configure_args
79	#
80	# We could figure srcdir and host out, but we'd have to do work that
81	# our caller has already done to figure them out and requiring these two
82	# seems reasonable.
83	# Note that `host' in this case is GCC's `target'. Target libraries are
84	# configured for a particular host.
85
86	if [ -n "${ac_configure_args}" ]; then
87	Makefile=${ac_file-Makefile}
88	ml_config_shell=${CONFIG_SHELL-/bin/sh}
89	ml_arguments="${ac_configure_args}"
90	ml_realsrcdir=${srcdir}
91	else
92	Makefile=${Makefile-Makefile}
93	ml_config_shell=${config_shell-/bin/sh}
94	ml_arguments="${arguments}"
95	if [ -n "${subdir}" -a "${subdir}" != "." ] ; then
96	ml_realsrcdir=${srcdir}/${subdir}
97	else
98	ml_realsrcdir=${srcdir}
99	fi
100	fi
101
102	# Scan all the arguments and set all the ones we need.
103
104	ml_verbose=--verbose
105	for option in ${ml_arguments}
106	do
107	case $option in
108	--*) ;;
109	-*) option=-$option ;;
110	esac
111
112	case $option in
113	--=)
114	optarg=`echo $option \| sed -e 's/^[^=]*=//'`
115	;;
116	esac
117
118	case $option in
119	--disable-*)
120	enableopt=`echo ${option} \| sed 's:^--disable-:enable_:;s:-:_:g'`
121	eval $enableopt=no
122	;;
123	--enable-*)
124	case "$option" in
125	=) ;;
126	*) optarg=yes ;;
127	esac
128	enableopt=`echo ${option} \| sed 's:^--::;s:=.*$::;s:-:_:g'`
129	eval $enableopt="$optarg"
130	;;
131	--norecursion \| --no*)
132	ml_norecursion=yes
133	;;
134	--silent \| --sil* \| --quiet \| --q*)
135	ml_verbose=--silent
136	;;
137	--verbose \| --v \| --verb*)
138	ml_verbose=--verbose
139	;;
140	--with-*)
141	case "$option" in
142	=) ;;
143	*) optarg=yes ;;
144	esac
145	withopt=`echo ${option} \| sed 's:^--::;s:=.*$::;s:-:_:g'`
146	eval $withopt="$optarg"
147	;;
148	--without-*)
149	withopt=`echo ${option} \| sed 's:^--::;s:out::;s:-:_:g'`
150	eval $withopt=no
151	;;
152	esac
153	done
154
155	# Only do this if --enable-multilib.
156	if [ "${enable_multilib}" = yes ]; then
157
158	# Compute whether this is the library's top level directory
159	# (ie: not a multilib subdirectory, and not a subdirectory like libg++/src).
160	# ${with_multisubdir} tells us we're in the right branch, but we could be
161	# in a subdir of that.
162	# ??? The previous version could void this test by separating the process into
163	# two files: one that only the library's toplevel configure.in ran (to
164	# configure the multilib subdirs), and another that all configure.in's ran to
165	# update the Makefile. It seemed reasonable to collapse all multilib support
166	# into one file, but it does leave us with having to perform this test.
167	ml_toplevel_p=no
168	if [ -z "${with_multisubdir}" ]; then
169	if [ "${srcdir}" = "." ]; then
170	# Use ${ml_realsrcdir} instead of ${srcdir} here to account for ${subdir}.
171	# ${with_target_subdir} = "." for native, otherwise target alias.
172	if [ "${with_target_subdir}" = "." ]; then
173	if [ -f ${ml_realsrcdir}/../config-ml.in ]; then
174	ml_toplevel_p=yes
175	fi
176	else
177	if [ -f ${ml_realsrcdir}/../../config-ml.in ]; then
178	ml_toplevel_p=yes
179	fi
180	fi
181	else
182	# Use ${ml_realsrcdir} instead of ${srcdir} here to account for ${subdir}.
183	if [ -f ${ml_realsrcdir}/../config-ml.in ]; then
184	ml_toplevel_p=yes
185	fi
186	fi
187	fi
188
189	# If this is the library's top level directory, set multidirs to the
190	# multilib subdirs to support. This lives at the top because we need
191	# `multidirs' set right away.
192
193	if [ "${ml_toplevel_p}" = yes ]; then
194
195	multidirs=
196	for i in `${CC-gcc} --print-multi-lib 2>/dev/null`; do
197	dir=`echo $i \| sed -e 's/;.*$//'`
198	if [ "${dir}" = "." ]; then
199	true
200	else
201	if [ -z "${multidirs}" ]; then
202	multidirs="${dir}"
203	else
204	multidirs="${multidirs} ${dir}"
205	fi
206	fi
207	done
208
209	# Target libraries are configured for the host they run on, so we check
210	# $host here, not $target.
211
212	case "${host}" in
213	arc--elf)
214	if [ x$enable_biendian != xyes ]
215	then
216	old_multidirs=${multidirs}
217	multidirs=""
218	for x in ${old_multidirs}; do
219	case "${x}" in
220	be) : ;;
221	*) multidirs="${multidirs} ${x}" ;;
222	esac
223	done
224	fi
225	;;
226	arm--)
227	if [ x"$enable_fpu" = xno ]
228	then
229	old_multidirs=${multidirs}
230	multidirs=""
231	for x in ${old_multidirs}; do
232	case "${x}" in
233	fpu) : ;;
234	*) multidirs="${multidirs} ${x}" ;;
235	esac
236	done
237	fi
238	if [ x"$enable_26bit" = xno ]
239	then
240	old_multidirs=${multidirs}
241	multidirs=""
242	for x in ${old_multidirs}; do
243	case "${x}" in
244	26bit) : ;;
245	*) multidirs="${multidirs} ${x}" ;;
246	esac
247	done
248	fi
249	if [ x"$enable_underscore" = xno ]
250	then
251	old_multidirs=${multidirs}
252	multidirs=""
253	for x in ${old_multidirs}; do
254	case "${x}" in
255	under) : ;;
256	*) multidirs="${multidirs} ${x}" ;;
257	esac
258	done
259	fi
260	if [ x"$enable_interwork" = xno ]
261	then
262	old_multidirs=${multidirs}
263	multidirs=""
264	for x in ${old_multidirs}; do
265	case "${x}" in
266	interwork) : ;;
267	*) multidirs="${multidirs} ${x}" ;;
268	esac
269	done
270	fi
271	if [ x$enable_biendian = xno ]
272	then
273	old_multidirs="${multidirs}"
274	multidirs=""
275	for x in ${old_multidirs}; do
276	case "$x" in
277	le ) : ;;
278	be ) : ;;
279	*) multidirs="${multidirs} ${x}" ;;
280	esac
281	done
282	fi
283	;;
284	m68--*)
285	if [ x$enable_softfloat = xno ]
286	then
287	old_multidirs="${multidirs}"
288	multidirs=""
289	for x in ${old_multidirs}; do
290	case "$x" in
291	soft-float ) : ;;
292	*) multidirs="${multidirs} ${x}" ;;
293	esac
294	done
295	fi
296	if [ x$enable_m68881 = xno ]
297	then
298	old_multidirs="${multidirs}"
299	multidirs=""
300	for x in ${old_multidirs}; do
301	case "$x" in
302	m68881 ) : ;;
303	*) multidirs="${multidirs} ${x}" ;;
304	esac
305	done
306	fi
307	if [ x$enable_m68000 = xno ]
308	then
309	old_multidirs="${multidirs}"
310	multidirs=""
311	for x in ${old_multidirs}; do
312	case "$x" in
313	m68000 ) : ;;
314	*) multidirs="${multidirs} ${x}" ;;
315	esac
316	done
317	fi
318	if [ x$enable_m68020 = xno ]
319	then
320	old_multidirs="${multidirs}"
321	multidirs=""
322	for x in ${old_multidirs}; do
323	case "$x" in
324	m68020 ) : ;;
325	*) multidirs="${multidirs} ${x}" ;;
326	esac
327	done
328	fi
329	;;
330	mips--*)
331	if [ x$enable_single_float = xno ]
332	then
333	old_multidirs="${multidirs}"
334	multidirs=""
335	for x in ${old_multidirs}; do
336	case "$x" in
337	single ) : ;;
338	*) multidirs="${multidirs} ${x}" ;;
339	esac
340	done
341	fi
342	if [ x$enable_biendian = xno ]
343	then
344	old_multidirs="${multidirs}"
345	multidirs=""
346	for x in ${old_multidirs}; do
347	case "$x" in
348	el ) : ;;
349	eb ) : ;;
350	*) multidirs="${multidirs} ${x}" ;;
351	esac
352	done
353	fi
354	if [ x$enable_softfloat = xno ]
355	then
356	old_multidirs="${multidirs}"
357	multidirs=""
358	for x in ${old_multidirs}; do
359	case "$x" in
360	soft-float ) : ;;
361	*) multidirs="${multidirs} ${x}" ;;
362	esac
363	done
364	fi
365	;;
366	powerpc--* \| rs6000--*)
367	if [ x$enable_softfloat = xno ]
368	then
369	old_multidirs="${multidirs}"
370	multidirs=""
371	for x in ${old_multidirs}; do
372	case "$x" in
373	soft-float ) : ;;
374	*) multidirs="${multidirs} ${x}" ;;
375	esac
376	done
377	fi
378	if [ x$enable_powercpu = xno ]
379	then
380	old_multidirs="${multidirs}"
381	multidirs=""
382	for x in ${old_multidirs}; do
383	case "$x" in
384	power \| /power \| /power/* ) : ;;
385	*) multidirs="${multidirs} ${x}" ;;
386	esac
387	done
388	fi
389	if [ x$enable_powerpccpu = xno ]
390	then
391	old_multidirs="${multidirs}"
392	multidirs=""
393	for x in ${old_multidirs}; do
394	case "$x" in
395	powerpc ) : ;;
396	*) multidirs="${multidirs} ${x}" ;;
397	esac
398	done
399	fi
400	if [ x$enable_powerpcos = xno ]
401	then
402	old_multidirs="${multidirs}"
403	multidirs=""
404	for x in ${old_multidirs}; do
405	case "$x" in
406	mcall-linux \| mcall-solaris ) : ;;
407	*) multidirs="${multidirs} ${x}" ;;
408	esac
409	done
410	fi
411	if [ x$enable_biendian = xno ]
412	then
413	old_multidirs="${multidirs}"
414	multidirs=""
415	for x in ${old_multidirs}; do
416	case "$x" in
417	mlittle \| mbig ) : ;;
418	*) multidirs="${multidirs} ${x}" ;;
419	esac
420	done
421	fi
422	if [ x$enable_sysv = xno ]
423	then
424	old_multidirs="${multidirs}"
425	multidirs=""
426	for x in ${old_multidirs}; do
427	case "$x" in
428	mcall-sysv ) : ;;
429	*) multidirs="${multidirs} ${x}" ;;
430	esac
431	done
432	fi
433	if [ x$enable_aix = xno ]
434	then
435	old_multidirs="${multidirs}"
436	multidirs=""
437	for x in ${old_multidirs}; do
438	case "$x" in
439	mcall-aix ) : ;;
440	*) multidirs="${multidirs} ${x}" ;;
441	esac
442	done
443	fi
444	;;
445	esac
446
447	# Remove extraneous blanks from multidirs.
448	# Tests like `if [ -n "$multidirs" ]' require it.
449	multidirs=`echo "$multidirs" \| sed -e 's/^[ ][ ]//' -e 's/[ ][ ]$//' -e 's/[ ][ ]*/ /g'`
450
451	# Add code to library's top level makefile to handle building the multilib
452	# subdirs.
453
454	cat > Multi.tem <<\EOF
455
456	# FIXME: There should be an @-sign in front of the `if'.
457	# Leave out until this is tested a bit more.
458	multi-do:
459	if [ -z "$(MULTIDIRS)" ]; then \
460	true; \
461	else \
462	rootpre=`pwd`/; export rootpre; \
463	srcrootpre=`cd $(srcdir); pwd`/; export srcrootpre; \
464	lib=`echo $${rootpre} \| sed -e 's,^./\([^/][^/]\)/$$,\1,'`; \
465	compiler="$(CC)"; \
466	for i in `$${compiler} --print-multi-lib 2>/dev/null`; do \
467	dir=`echo $$i \| sed -e 's/;.*$$//'`; \
468	if [ "$${dir}" = "." ]; then \
469	true; \
470	else \
471	if [ -d ../$${dir}/$${lib} ]; then \
472	flags=`echo $$i \| sed -e 's/^[^;]*;//' -e 's/@/ -/g'`; \
473	if (cd ../$${dir}/$${lib}; $(MAKE) $(FLAGS_TO_PASS) \
474	CFLAGS="$(CFLAGS) $${flags}" \
475	CXXFLAGS="$(CXXFLAGS) $${flags}" \
476	LIBCFLAGS="$(LIBCFLAGS) $${flags}" \
477	LIBCXXFLAGS="$(LIBCXXFLAGS) $${flags}" \
478	LDFLAGS="$(LDFLAGS) $${flags}" \
479	$(DO)); then \
480	true; \
481	else \
482	exit 1; \
483	fi; \
484	else true; \
485	fi; \
486	fi; \
487	done; \
488	fi
489
490	# FIXME: There should be an @-sign in front of the `if'.
491	# Leave out until this is tested a bit more.
492	multi-clean:
493	if [ -z "$(MULTIDIRS)" ]; then \
494	true; \
495	else \
496	lib=`pwd \| sed -e 's,^./\([^/][^/]\)$$,\1,'`; \
497	for dir in Makefile $(MULTIDIRS); do \
498	if [ -f ../$${dir}/$${lib}/Makefile ]; then \
499	if (cd ../$${dir}/$${lib}; $(MAKE) $(FLAGS_TO_PASS) $(DO)); \
500	then true; \
501	else exit 1; \
502	fi; \
503	else true; \
504	fi; \
505	done; \
506	fi
507	EOF
508
509	cat ${Makefile} Multi.tem > Makefile.tem
510	rm -f ${Makefile} Multi.tem
511	mv Makefile.tem ${Makefile}
512
513	fi # ${ml_toplevel_p} = yes
514
515	if [ "${ml_verbose}" = --verbose ]; then
516	echo "Adding multilib support to Makefile in ${ml_realsrcdir}"
517	if [ "${ml_toplevel_p}" = yes ]; then
518	echo "multidirs=${multidirs}"
519	fi
520	echo "with_multisubdir=${with_multisubdir}"
521	fi
522
523	if [ "${srcdir}" = "." ]; then
524	if [ "${with_target_subdir}" != "." ]; then
525	ml_srcdotdot="../"
526	else
527	ml_srcdotdot=""
528	fi
529	else
530	ml_srcdotdot=""
531	fi
532
533	if [ -z "${with_multisubdir}" ]; then
534	ml_subdir=
535	ml_builddotdot=
536	: # ml_srcdotdot= # already set
537	else
538	ml_subdir="/${with_multisubdir}"
539	# The '[^/][^/]*' appears that way to work around a SunOS sed bug.
540	ml_builddotdot=`echo ${with_multisubdir} \| sed -e 's:[^/][^/]*:..:g'`/
541	if [ "$srcdir" = "." ]; then
542	ml_srcdotdot=${ml_srcdotdot}${ml_builddotdot}
543	else
544	: # ml_srcdotdot= # already set
545	fi
546	fi
547
548	if [ "${ml_toplevel_p}" = yes ]; then
549	ml_do='$(MAKE)'
550	ml_clean='$(MAKE)'
551	else
552	ml_do=true
553	ml_clean=true
554	fi
555
556	# TOP is used by newlib and should not be used elsewhere for this purpose.
557	# MULTI{SRC,BUILD}TOP are the proper ones to use. MULTISRCTOP is empty
558	# when srcdir != builddir. MULTIBUILDTOP is always some number of ../'s.
559	# FIXME: newlib needs to be updated to use MULTI{SRC,BUILD}TOP so we can
560	# delete TOP. Newlib may wish to continue to use TOP for its own purposes
561	# of course.
562	# MULTIDIRS is non-empty for the cpu top level Makefile (eg: newlib/Makefile)
563	# and lists the subdirectories to recurse into.
564	# MULTISUBDIR is non-empty in each cpu subdirectory's Makefile
565	# (eg: newlib/h8300h/Makefile) and is the installed subdirectory name with
566	# a leading '/'.
567	# MULTIDO is used for targets like all, install, and check where
568	# $(FLAGS_TO_PASS) augmented with the subdir's compiler option is needed.
569	# MULTICLEAN is used for the *clean targets.
570	#
571	# ??? It is possible to merge MULTIDO and MULTICLEAN into one. They are
572	# currently kept separate because we don't want the *clean targets to require
573	# the existence of the compiler (which MULTIDO currently requires) and
574	# therefore we'd have to record the directory options as well as names
575	# (currently we just record the names and use --print-multi-lib to get the
576	# options).
577
578	sed -e "s:^TOP[ ]=[ ]\([./]\)[ ]$:TOP = ${ml_builddotdot}\1:" \
579	-e "s:^MULTISRCTOP[ ]=.$:MULTISRCTOP = ${ml_srcdotdot}:" \
580	-e "s:^MULTIBUILDTOP[ ]=.$:MULTIBUILDTOP = ${ml_builddotdot}:" \
581	-e "s:^MULTIDIRS[ ]=.$:MULTIDIRS = ${multidirs}:" \
582	-e "s:^MULTISUBDIR[ ]=.$:MULTISUBDIR = ${ml_subdir}:" \
583	-e "s:^MULTIDO[ ]=.$:MULTIDO = $ml_do:" \
584	-e "s:^MULTICLEAN[ ]=.$:MULTICLEAN = $ml_clean:" \
585	${Makefile} > Makefile.tem
586	rm -f ${Makefile}
587	mv Makefile.tem ${Makefile}
588
589	# If this is the library's top level, configure each multilib subdir.
590	# This is done at the end because this is the loop that runs configure
591	# in each multilib subdir and it seemed reasonable to finish updating the
592	# Makefile before going on to configure the subdirs.
593
594	if [ "${ml_toplevel_p}" = yes ]; then
595
596	# We must freshly configure each subdirectory. This bit of code is
597	# actually partially stolen from the main configure script. FIXME.
598
599	if [ -n "${multidirs}" ] && [ -z "${ml_norecursion}" ]; then
600
601	if [ "${ml_verbose}" = --verbose ]; then
602	echo "Running configure in multilib subdirs ${multidirs}"
603	echo "pwd: `pwd`"
604	fi
605
606	ml_origdir=`pwd`
607	ml_libdir=`echo $ml_origdir \| sed -e 's,^.*/,,'`
608	# cd to top-level-build-dir/${with_target_subdir}
609	cd ..
610
611	for ml_dir in ${multidirs}; do
612
613	if [ "${ml_verbose}" = --verbose ]; then
614	echo "Running configure in multilib subdir ${ml_dir}"
615	echo "pwd: `pwd`"
616	fi
617
618	if [ -d ${ml_dir} ]; then true; else mkdir ${ml_dir}; fi
619	if [ -d ${ml_dir}/${ml_libdir} ]; then true; else mkdir ${ml_dir}/${ml_libdir}; fi
620
621	# Eg: if ${ml_dir} = m68000/m68881, dotdot = ../../
622	dotdot=../`echo ${ml_dir} \| sed -e 's\|[^/]\|\|g' -e 's\|/\|../\|g'`
623
624	case ${srcdir} in
625	".")
626	echo Building symlink tree in `pwd`/${ml_dir}/${ml_libdir}
627	if [ "${with_target_subdir}" != "." ]; then
628	ml_unsubdir="../"
629	else
630	ml_unsubdir=""
631	fi
632	(cd ${ml_dir}/${ml_libdir};
633	../${dotdot}${ml_unsubdir}symlink-tree ../${dotdot}${ml_unsubdir}${ml_libdir} "")
634	if [ -f ${ml_dir}/${ml_libdir}/Makefile ]; then
635	if [ x"${MAKE}" = x ]; then
636	(cd ${ml_dir}/${ml_libdir}; make distclean)
637	else
638	(cd ${ml_dir}/${ml_libdir}; ${MAKE} distclean)
639	fi
640	fi
641	ml_newsrcdir="."
642	ml_srcdiroption=
643	multisrctop=${dotdot}
644	;;
645	*)
646	case "${srcdir}" in
647	/*) # absolute path
648	ml_newsrcdir=${srcdir}
649	;;
650	*) # otherwise relative
651	ml_newsrcdir=${dotdot}${srcdir}
652	;;
653	esac
654	ml_srcdiroption="-srcdir=${ml_newsrcdir}"
655	multisrctop=
656	;;
657	esac
658
659	case "${progname}" in
660	/*) ml_recprog=${progname} ;;
661	*) ml_recprog=${dotdot}${progname} ;;
662	esac
663
664	# FIXME: POPDIR=${PWD=`pwd`} doesn't work here.
665	ML_POPDIR=`pwd`
666	cd ${ml_dir}/${ml_libdir}
667
668	if [ -f ${ml_newsrcdir}/configure ]; then
669	ml_recprog=${ml_newsrcdir}/configure
670	fi
671	if eval ${ml_config_shell} ${ml_recprog} \
672	--with-multisubdir=${ml_dir} --with-multisrctop=${multisrctop} \
673	${ml_arguments} ${ml_srcdiroption} ; then
674	true
675	else
676	exit 1
677	fi
678
679	cd ${ML_POPDIR}
680
681	done
682
683	cd ${ml_origdir}
684	fi
685
686	fi # ${ml_toplevel_p} = yes
687	fi # ${enable_multilib} = yes