libatomic/configure.tgt

   1 # -*- shell-script -*-
   2 #  Copyright (C) 2012-2013 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*)               ARCH=alpha ;;
  31   rs6000 | powerpc*)    ARCH=powerpc ;;
  32   sh*)                  ARCH=sh ;;
  33
  34   arm*)
  35         ARCH=arm
  36         # ??? Detect when -march=armv7 is already enabled.
  37         try_ifunc=yes
  38         ;;
  39
  40   sparc)
  41         case " ${CC} ${CFLAGS} " in
  42           *" -m64 "*)
  43             ;;
  44           *)
  45             if test -z "$with_cpu"; then
  46               XCFLAGS="${XCFLAGS} -mcpu=v9"
  47             fi
  48         esac
  49         ARCH=sparc
  50         ;;
  51   sparc64|sparcv9)
  52         case " ${CC} ${CFLAGS} " in
  53           *" -m32 "*)
  54             XCFLAGS="${XCFLAGS} -mcpu=v9"
  55             ;;
  56         esac
  57         ARCH=sparc
  58         ;;
  59
  60   i[3456]86)
  61         case " ${CC} ${CFLAGS} " in
  62           *" -m64 "*|*" -mx32 "*)
  63             ;;
  64           *)
  65             if test -z "$with_arch"; then
  66               XCFLAGS="${XCFLAGS} -march=i486 -mtune=${target_cpu}"
  67               XCFLAGS="${XCFLAGS} -fomit-frame-pointer"
  68             fi
  69         esac
  70         ARCH=x86
  71         # ??? Detect when -march=i686 is already enabled.
  72         try_ifunc=yes
  73         ;;
  74   x86_64)
  75         case " ${CC} ${CFLAGS} " in
  76           *" -m32 "*)
  77             XCFLAGS="${XCFLAGS} -march=i486 -mtune=generic"
  78             XCFLAGS="${XCFLAGS} -fomit-frame-pointer"
  79             ;;
  80           *)
  81             ;;
  82         esac
  83         ARCH=x86
  84         # ??? Detect when -mcx16 is already enabled.
  85         try_ifunc=yes
  86         ;;
  87
  88   *)                    ARCH="${target_cpu}" ;;
  89 esac
  90
  91 # The cpu configury is always most relevant.
  92 if test -d ${srcdir}/config/$ARCH ; then
  93   config_path="$ARCH"
  94 fi
  95
  96 # Other system configury
  97 case "${target}" in
  98   aarch64*)
  99         # This is currently not supported in AArch64.
 100         UNSUPPORTED=1
 101         ;;
 102
 103   arm*-*-linux*)
 104         # OS support for atomic primitives.
 105         config_path="${config_path} linux/arm posix"
 106         ;;
 107
 108   *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu \
 109   | *-*-netbsd* | *-*-freebsd* | *-*-openbsd* \
 110   | *-*-solaris2* | *-*-sysv4* | *-*-irix6* | *-*-osf* | *-*-hpux11* \
 111   | *-*-darwin* | *-*-aix*)
 112         # POSIX system.  The OS is supported.
 113         config_path="${config_path} posix"
 114         ;;
 115
 116   *-*-elf*)
 117         # ??? No target OS.  We could be targeting bare-metal kernel-mode,
 118         # or user-mode for some custom OS.  If the target supports TAS,
 119         # we can build our own spinlocks, given there are no signals.
 120         # If the target supports disabling interrupts, we can work in
 121         # kernel-mode, given the system is not multi-processor.
 122         UNSUPPORTED=1
 123         ;;
 124
 125   *)
 126         # Who are you?
 127         UNSUPPORTED=1
 128         ;;
 129 esac