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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 ;;
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
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