libatomic/configure.tgt

   1 # -*- shell-script -*-
   2 #  Copyright (C) 2012-2015 Free Software Foundation, Inc.
   3 #  Contributed by Richard Henderson <rth@redhat.com>.
   4 #
   5 #  This file is part of the GNU Atomic Library (libatomic).
   6 #
   7 #  Libatomic is free software; you can redistribute it and/or modify it
   8 #  under the terms of the GNU General Public License as published by
   9 #  the Free Software Foundation; either version 3 of the License, or
  10 #  (at your option) any later version.
  11 #
  12 #  Libatomic is distributed in the hope that it will be useful, but WITHOUT ANY
  13 #  WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  14 #  FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15 #  more details.
  16 #
  17 #  Under Section 7 of GPL version 3, you are granted additional
  18 #  permissions described in the GCC Runtime Library Exception, version
  19 #  3.1, as published by the Free Software Foundation.
  20 #
  21 #  You should have received a copy of the GNU General Public License and
  22 #  a copy of the GCC Runtime Library Exception along with this program;
  23 #  see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  24 #  <http://www.gnu.org/licenses/>.
  25
  26 # Map the target cpu to an ARCH sub-directory.  At the same time,
  27 # work out any special compilation flags as necessary.
  28
  29 case "${target_cpu}" in
  30   alpha*)
  31         # fenv.c needs this option to generate inexact exceptions.
  32         XCFLAGS="${XCFLAGS} -mfp-trap-mode=sui"
  33         ARCH=alpha
  34         ;;
  35   rs6000 | powerpc*)    ARCH=powerpc ;;
  36   sh*)                  ARCH=sh ;;
  37
  38   arm*)
  39         ARCH=arm
  40         case "${target}" in
  41             arm*-*-freebsd*)
  42                 ;;
  43             *)
  44                 # ??? Detect when -march=armv7 is already enabled.
  45                 try_ifunc=yes
  46                 ;;
  47         esac
  48         ;;
  49   sparc)
  50         case " ${CC} ${CFLAGS} " in
  51           *" -m64 "*)
  52             ;;
  53           *)
  54             if test -z "$with_cpu"; then
  55               XCFLAGS="${XCFLAGS} -mcpu=v9"
  56             fi
  57         esac
  58         ARCH=sparc
  59         ;;
  60   sparc64|sparcv9)
  61         case " ${CC} ${CFLAGS} " in
  62           *" -m32 "*)
  63             XCFLAGS="${XCFLAGS} -mcpu=v9"
  64             ;;
  65         esac
  66         ARCH=sparc
  67         ;;
  68
  69   i[3456]86)
  70         case " ${CC} ${CFLAGS} " in
  71           *" -m64 "*|*" -mx32 "*)
  72             ;;
  73           *)
  74             if test -z "$with_arch"; then
  75               XCFLAGS="${XCFLAGS} -march=i486 -mtune=${target_cpu}"
  76               XCFLAGS="${XCFLAGS} -fomit-frame-pointer"
  77             fi
  78         esac
  79         ARCH=x86
  80         # ??? Detect when -march=i686 is already enabled.
  81         try_ifunc=yes
  82         ;;
  83   x86_64)
  84         case " ${CC} ${CFLAGS} " in
  85           *" -m32 "*)
  86             XCFLAGS="${XCFLAGS} -march=i486 -mtune=generic"
  87             XCFLAGS="${XCFLAGS} -fomit-frame-pointer"
  88             ;;
  89           *)
  90             ;;
  91         esac
  92         ARCH=x86
  93         # ??? Detect when -mcx16 is already enabled.
  94         try_ifunc=yes
  95         ;;
  96
  97   *)                    ARCH="${target_cpu}" ;;
  98 esac
  99
 100 # The cpu configury is always most relevant.
 101 if test -d ${srcdir}/config/$ARCH ; then
 102   config_path="$ARCH"
 103 fi
 104
 105 # Other system configury
 106 case "${target}" in
 107   arm*-*-linux*)
 108         # OS support for atomic primitives.
 109         config_path="${config_path} linux/arm posix"
 110         ;;
 111
 112   *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu \
 113   | *-*-netbsd* | *-*-freebsd* | *-*-openbsd* \
 114   | *-*-solaris2* | *-*-sysv4* | *-*-irix6* | *-*-osf* | *-*-hpux11* \
 115   | *-*-darwin* | *-*-aix* | *-*-cygwin*)
 116         # POSIX system.  The OS is supported.
 117         config_path="${config_path} posix"
 118         ;;
 119
 120   *-*-mingw*)
 121         # OS support for atomic primitives.
 122         case ${target_thread_file} in
 123           win32)
 124             config_path="${config_path} mingw"
 125             ;;
 126           posix)
 127             config_path="${config_path} posix"
 128             ;;
 129         esac
 130         ;;
 131   *-*-elf*)
 132         # ??? No target OS.  We could be targeting bare-metal kernel-mode,
 133         # or user-mode for some custom OS.  If the target supports TAS,
 134         # we can build our own spinlocks, given there are no signals.
 135         # If the target supports disabling interrupts, we can work in
 136         # kernel-mode, given the system is not multi-processor.
 137         UNSUPPORTED=1
 138         ;;
 139
 140   *)
 141         # Who are you?
 142         UNSUPPORTED=1
 143         ;;
 144 esac