libitm/configure.tgt

   1 # -*- shell-script -*-
   2 #   Copyright (C) 2011 Free Software Foundation, Inc.
   3
   4 # This program is free software; you can redistribute it and/or modify
   5 # it under the terms of the GNU General Public License as published by
   6 # the Free Software Foundation; either version 2 of the License, or
   7 # (at your option) any later version.
   8 #
   9 # This program is distributed in the hope that it will be useful,
  10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 # GNU General Public License for more details.
  13 #
  14 # You should have received a copy of the GNU General Public License
  15 # along with this program; if not, write to the Free Software
  16 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  17
  18 # This is the target specific configuration file.  This is invoked by the
  19 # autoconf generated configure script.  Putting it in a separate shell file
  20 # lets us skip running autoconf when modifying target specific information.
  21
  22 # This file switches on the shell variable ${target}, and sets the
  23 # following shell variables:
  24 #  config_path          An ordered list of directories to search for
  25 #                       sources and headers.  This is relative to the
  26 #                       config subdirectory of the source tree.
  27 #  XCFLAGS              Add extra compile flags to use.
  28 #  XLDFLAGS             Add extra link flags to use.
  29
  30 # Optimize TLS usage by avoiding the overhead of dynamic allocation.
  31 if test "$gcc_cv_have_tls" = yes ; then
  32   case "${target}" in
  33
  34     # For x86, we use slots in the TCB head for most of our TLS.
  35     # The setup of those slots in beginTransaction can afford to
  36     # use the global-dynamic model.
  37     i[456]86-*-linux* | x86_64-*-linux*)
  38         ;;
  39
  40     *-*-linux*)
  41         XCFLAGS="${XCFLAGS} -ftls-model=initial-exec"
  42         ;;
  43   esac
  44 fi
  45
  46 # Map the target cpu to an ARCH sub-directory.  At the same time,
  47 # work out any special compilation flags as necessary.
  48 case "${target_cpu}" in
  49   alpha*)       ARCH=alpha ;;
  50
  51   i[3456]86)
  52         case " ${CC} ${CFLAGS} " in
  53           *" -m64 "*)
  54             ;;
  55           *)
  56             if test -z "$with_arch"; then
  57               XCFLAGS="${XCFLAGS} -march=i486 -mtune=${target_cpu}"
  58               XCFLAGS="${XCFLAGS} -fomit-frame-pointer"
  59             fi
  60         esac
  61         ARCH=x86
  62         ;;
  63
  64   x86_64)
  65         case " ${CC} ${CFLAGS} " in
  66           *" -m32 "*)
  67             XCFLAGS="${XCFLAGS} -march=i486 -mtune=i686"
  68             XCFLAGS="${XCFLAGS} -fomit-frame-pointer"
  69             ;;
  70         esac
  71         ARCH=x86
  72         ;;
  73
  74   *)
  75         ARCH="${target_cpu}"
  76         ;;
  77 esac
  78
  79 # For the benefit of top-level configure, determine if the cpu is supported.
  80 test -d ${srcdir}/$ARCH || UNSUPPORTED=1
  81
  82 # Since we require POSIX threads, assume a POSIX system by default.
  83 config_path="$ARCH posix generic"
  84
  85 # Other system configury
  86 case "${target}" in
  87   *-*-linux*)
  88         if test "$enable_linux_futex" = yes; then
  89           config_path="linux/$ARCH linux $config_path"
  90         fi
  91         ;;
  92
  93   *-*-gnu* | *-*-k*bsd*-gnu \
  94   | *-*-netbsd* | *-*-freebsd* | *-*-openbsd* \
  95   | *-*-solaris2* | *-*-sysv4* | *-*-irix6* | *-*-osf* | *-*-hpux11* \
  96   | *-*-darwin* | *-*-aix*)
  97         # POSIX system.  The OS is supported.
  98         ;;
  99
 100   *)    # Non-POSIX, or embedded system
 101         UNSUPPORTED=1
 102         ;;
 103 esac