libatomic/configure.tgt

   1 # -*- shell-script -*-
   2 #  Copyright (C) 2012-2014 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         # ??? Detect when -march=armv7 is already enabled.
  41         try_ifunc=yes
  42         ;;
  43
  44   sparc)
  45         case " ${CC} ${CFLAGS} " in
  46           *" -m64 "*)
  47             ;;
  48           *)
  49             if test -z "$with_cpu"; then
  50               XCFLAGS="${XCFLAGS} -mcpu=v9"
  51             fi
  52         esac
  53         ARCH=sparc
  54         ;;
  55   sparc64|sparcv9)
  56         case " ${CC} ${CFLAGS} " in
  57           *" -m32 "*)
  58             XCFLAGS="${XCFLAGS} -mcpu=v9"
  59             ;;
  60         esac
  61         ARCH=sparc
  62         ;;
  63
  64   i[3456]86)
  65         case " ${CC} ${CFLAGS} " in
  66           *" -m64 "*|*" -mx32 "*)
  67             ;;
  68           *)
  69             if test -z "$with_arch"; then
  70               XCFLAGS="${XCFLAGS} -march=i486 -mtune=${target_cpu}"
  71               XCFLAGS="${XCFLAGS} -fomit-frame-pointer"
  72             fi
  73         esac
  74         ARCH=x86
  75         # ??? Detect when -march=i686 is already enabled.
  76         try_ifunc=yes
  77         ;;
  78   x86_64)
  79         case " ${CC} ${CFLAGS} " in
  80           *" -m32 "*)
  81             XCFLAGS="${XCFLAGS} -march=i486 -mtune=generic"
  82             XCFLAGS="${XCFLAGS} -fomit-frame-pointer"
  83             ;;
  84           *)
  85             ;;
  86         esac
  87         ARCH=x86
  88         # ??? Detect when -mcx16 is already enabled.
  89         try_ifunc=yes
  90         ;;
  91
  92   *)                    ARCH="${target_cpu}" ;;
  93 esac
  94
  95 # The cpu configury is always most relevant.
  96 if test -d ${srcdir}/config/$ARCH ; then
  97   config_path="$ARCH"
  98 fi
  99
 100 # Other system configury
 101 case "${target}" in
 102   arm*-*-linux*)
 103         # OS support for atomic primitives.
 104         config_path="${config_path} linux/arm posix"
 105         ;;
 106
 107   *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu \
 108   | *-*-netbsd* | *-*-freebsd* | *-*-openbsd* \
 109   | *-*-solaris2* | *-*-sysv4* | *-*-irix6* | *-*-osf* | *-*-hpux11* \
 110   | *-*-darwin* | *-*-aix*)
 111         # POSIX system.  The OS is supported.
 112         config_path="${config_path} posix"
 113         ;;
 114
 115   *-*-mingw*)
 116         # OS support for atomic primitives.
 117         case ${target_thread_file} in
 118           win32)
 119             config_path="${config_path} mingw"
 120             ;;
 121           posix)
 122             config_path="${config_path} posix"
 123             ;;
 124         esac
 125         ;;
 126   *-*-elf*)
 127         # ??? No target OS.  We could be targeting bare-metal kernel-mode,
 128         # or user-mode for some custom OS.  If the target supports TAS,
 129         # we can build our own spinlocks, given there are no signals.
 130         # If the target supports disabling interrupts, we can work in
 131         # kernel-mode, given the system is not multi-processor.
 132         UNSUPPORTED=1
 133         ;;
 134
 135   *)
 136         # Who are you?
 137         UNSUPPORTED=1
 138         ;;
 139 esac