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# -*- shell-script -*-

#   Copyright (C) 2011, 2012 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 of the License, 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.

# This is the target specific configuration file.  This is invoked by the

# autoconf generated configure script.  Putting it in a separate shell file

# lets us skip running autoconf when modifying target specific information.

# This file switches on the shell variable ${target}, and sets the

# following shell variables:

#  config_path          An ordered list of directories to search for

#                       sources and headers.  This is relative to the

#                       config subdirectory of the source tree.

#  XCFLAGS              Add extra compile flags to use.

#  XLDFLAGS             Add extra link flags to use.

# Optimize TLS usage by avoiding the overhead of dynamic allocation.

if test "$gcc_cv_have_tls" = yes ; then

  case "${target}" in

    # For x86, we use slots in the TCB head for most of our TLS.

    # The setup of those slots in beginTransaction can afford to

    # use the global-dynamic model.

    i[456]86-*-linux* | x86_64-*-linux*)

        ;;

    *-*-linux*)

        XCFLAGS="${XCFLAGS} -ftls-model=initial-exec"

        ;;

  esac

fi

# Map the target cpu to an ARCH sub-directory.  At the same time,

# work out any special compilation flags as necessary.

case "${target_cpu}" in

  alpha*)               ARCH=alpha ;;

  rs6000 | powerpc*)    ARCH=powerpc ;;

  arm*)         ARCH=arm ;;

  i[3456]86)

        case " ${CC} ${CFLAGS} " in

          *" -m64 "*)

            ;;

          *)

            if test -z "$with_arch"; then

              XCFLAGS="${XCFLAGS} -march=i486 -mtune=${target_cpu}"

              XCFLAGS="${XCFLAGS} -fomit-frame-pointer"

            fi

        esac

        ARCH=x86

        ;;

  sh*)          ARCH=sh ;;

  sparc)

        case " ${CC} ${CFLAGS} " in

          *" -m64 "*)

            ;;

          *)

            if test -z "$with_cpu"; then

              XCFLAGS="${XCFLAGS} -mcpu=v9"

            fi

        esac

        ARCH=sparc

        ;;

  sparc64|sparcv9)

        case " ${CC} ${CFLAGS} " in

          *" -m32 "*)

            XCFLAGS="${XCFLAGS} -mcpu=v9"

            ;;

          *" -m64 "*)

            ;;

          *)

            if test "x$with_cpu" = xv8; then

              XCFLAGS="${XCFLAGS} -mcpu=v9"

            fi

            ;;

        esac

        ARCH=sparc

        ;;

  x86_64)

        case " ${CC} ${CFLAGS} " in

          *" -m32 "*)

            XCFLAGS="${XCFLAGS} -march=i486 -mtune=i686"

            XCFLAGS="${XCFLAGS} -fomit-frame-pointer"

            ;;

        esac

        ARCH=x86

        ;;

  *)

        ARCH="${target_cpu}"

        ;;

esac

# For the benefit of top-level configure, determine if the cpu is supported.

test -d ${srcdir}/config/$ARCH || UNSUPPORTED=1

# Since we require POSIX threads, assume a POSIX system by default.

config_path="$ARCH posix generic"

# Other system configury

case "${target}" in

  *-*-linux*)

        if test "$enable_linux_futex" = yes; then

          config_path="linux/$ARCH linux $config_path"

        fi

        ;;

  powerpc*-*-aix* | rs6000-*-aix*)

        # The system ought to be supported, but sjlj.S has not been ported.

        UNSUPPORTED=1

        ;;

  *-*-gnu* | *-*-k*bsd*-gnu \

  | *-*-netbsd* | *-*-freebsd* | *-*-openbsd* \

  | *-*-solaris2* | *-*-sysv4* | *-*-irix6* | *-*-osf* | *-*-hpux11* \

  | *-*-darwin* | *-*-aix*)

        # POSIX system.  The OS is supported.

        ;;

  *)    # Non-POSIX, or embedded system

        UNSUPPORTED=1

        ;;

esac