libitm/configure.tgt

   1 # -*- shell-script -*-
   2 #   Copyright (C) 2011, 2012 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   rs6000 | powerpc*)    ARCH=powerpc ;;
  51
  52   arm*)         ARCH=arm ;;
  53
  54   i[3456]86)
  55         case " ${CC} ${CFLAGS} " in
  56           *" -m64 "*|*" -mx32 "*)
  57             ;;
  58           *)
  59             if test -z "$with_arch"; then
  60               XCFLAGS="${XCFLAGS} -march=i486 -mtune=${target_cpu}"
  61               XCFLAGS="${XCFLAGS} -fomit-frame-pointer"
  62             fi
  63         esac
  64         XCFLAGS="${XCFLAGS} -mrtm"
  65         ARCH=x86
  66         ;;
  67
  68   sh*)          ARCH=sh ;;
  69
  70   sparc)
  71         case " ${CC} ${CFLAGS} " in
  72           *" -m64 "*)
  73             ;;
  74           *)
  75             if test -z "$with_cpu"; then
  76               XCFLAGS="${XCFLAGS} -mcpu=v9"
  77             fi
  78         esac
  79         ARCH=sparc
  80         ;;
  81
  82   sparc64|sparcv9)
  83         case " ${CC} ${CFLAGS} " in
  84           *" -m32 "*)
  85             XCFLAGS="${XCFLAGS} -mcpu=v9"
  86             ;;
  87           *" -m64 "*)
  88             ;;
  89           *)
  90             if test "x$with_cpu" = xv8; then
  91               XCFLAGS="${XCFLAGS} -mcpu=v9"
  92             fi
  93             ;;
  94         esac
  95         ARCH=sparc
  96         ;;
  97
  98   x86_64)
  99         case " ${CC} ${CFLAGS} " in
 100           *" -m32 "*)
 101             XCFLAGS="${XCFLAGS} -march=i486 -mtune=i686"
 102             XCFLAGS="${XCFLAGS} -fomit-frame-pointer"
 103             ;;
 104         esac
 105         XCFLAGS="${XCFLAGS} -mrtm"
 106         ARCH=x86
 107         ;;
 108
 109   *)
 110         ARCH="${target_cpu}"
 111         ;;
 112 esac
 113
 114 # For the benefit of top-level configure, determine if the cpu is supported.
 115 test -d ${srcdir}/config/$ARCH || UNSUPPORTED=1
 116
 117 # Since we require POSIX threads, assume a POSIX system by default.
 118 config_path="$ARCH posix generic"
 119
 120 # Other system configury
 121 case "${target}" in
 122   *-*-linux*)
 123         if test "$enable_linux_futex" = yes; then
 124           config_path="linux/$ARCH linux $config_path"
 125         fi
 126         ;;
 127
 128   powerpc*-*-aix* | rs6000-*-aix*)
 129         # The system ought to be supported, but sjlj.S has not been ported.
 130         UNSUPPORTED=1
 131         ;;
 132
 133   *-*-gnu* | *-*-k*bsd*-gnu \
 134   | *-*-netbsd* | *-*-freebsd* | *-*-openbsd* \
 135   | *-*-solaris2* | *-*-sysv4* | *-*-hpux11* \
 136   | *-*-darwin* | *-*-aix*)
 137         # POSIX system.  The OS is supported.
 138         ;;
 139
 140   *)    # Non-POSIX, or embedded system
 141         UNSUPPORTED=1
 142         ;;
 143 esac