libatomic/configure.tgt

   1 # -*- shell-script -*-
   2 #  Copyright (C) 2012-2016 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 # Give operating systems the opportunity to discard XCFLAGS modifications based
  30 # on ${target_cpu}.  For example to allow proper use of multilibs.
  31 configure_tgt_pre_target_cpu_XCFLAGS="${XCFLAGS}"
  32
  33 case "${target_cpu}" in
  34   alpha*)
  35         # fenv.c needs this option to generate inexact exceptions.
  36         XCFLAGS="${XCFLAGS} -mfp-trap-mode=sui"
  37         ARCH=alpha
  38         ;;
  39   rs6000 | powerpc*)    ARCH=powerpc ;;
  40   sh*)                  ARCH=sh ;;
  41
  42   arm*)
  43         ARCH=arm
  44         case "${target}" in
  45             arm*-*-freebsd*)
  46                 ;;
  47             *)
  48                 # ??? Detect when -march=armv7 is already enabled.
  49                 try_ifunc=yes
  50                 ;;
  51         esac
  52         ;;
  53   sparc)
  54         case " ${CC} ${CFLAGS} " in
  55           *" -m64 "*)
  56             ;;
  57           *)
  58             if test -z "$with_cpu"; then
  59               XCFLAGS="${XCFLAGS} -mcpu=v9"
  60             fi
  61         esac
  62         ARCH=sparc
  63         ;;
  64   sparc64|sparcv9)
  65         case " ${CC} ${CFLAGS} " in
  66           *" -m32 "*)
  67             XCFLAGS="${XCFLAGS} -mcpu=v9"
  68             ;;
  69         esac
  70         ARCH=sparc
  71         ;;
  72
  73   i[3456]86)
  74         case " ${CC} ${CFLAGS} " in
  75           *" -m64 "*|*" -mx32 "*)
  76             ;;
  77           *)
  78             if test -z "$with_arch"; then
  79               XCFLAGS="${XCFLAGS} -march=i486 -mtune=${target_cpu}"
  80               XCFLAGS="${XCFLAGS} -fomit-frame-pointer"
  81             fi
  82         esac
  83         ARCH=x86
  84         # ??? Detect when -march=i686 is already enabled.
  85         try_ifunc=yes
  86         ;;
  87   x86_64)
  88         case " ${CC} ${CFLAGS} " in
  89           *" -m32 "*)
  90             XCFLAGS="${XCFLAGS} -march=i486 -mtune=generic"
  91             XCFLAGS="${XCFLAGS} -fomit-frame-pointer"
  92             ;;
  93           *)
  94             ;;
  95         esac
  96         ARCH=x86
  97         # ??? Detect when -mcx16 is already enabled.
  98         try_ifunc=yes
  99         ;;
 100
 101   *)                    ARCH="${target_cpu}" ;;
 102 esac
 103
 104 # The cpu configury is always most relevant.
 105 if test -d ${srcdir}/config/$ARCH ; then
 106   config_path="$ARCH"
 107 fi
 108
 109 # Other system configury
 110 case "${target}" in
 111   arm*-*-linux*)
 112         # OS support for atomic primitives.
 113         config_path="${config_path} linux/arm posix"
 114         ;;
 115
 116   *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu \
 117   | *-*-netbsd* | *-*-freebsd* | *-*-openbsd* | *-*-dragonfly* \
 118   | *-*-solaris2* | *-*-sysv4* | *-*-irix6* | *-*-osf* | *-*-hpux11* \
 119   | *-*-darwin* | *-*-aix* | *-*-cygwin*)
 120         # POSIX system.  The OS is supported.
 121         config_path="${config_path} posix"
 122         ;;
 123
 124   *-*-mingw*)
 125         # OS support for atomic primitives.
 126         case ${target_thread_file} in
 127           win32)
 128             config_path="${config_path} mingw"
 129             ;;
 130           posix)
 131             config_path="${config_path} posix"
 132             ;;
 133         esac
 134         ;;
 135
 136   *-*-rtems*)
 137         XCFLAGS="${configure_tgt_pre_target_cpu_XCFLAGS}"
 138         config_path="rtems"
 139         ;;
 140
 141   *-*-elf*)
 142         # ??? No target OS.  We could be targeting bare-metal kernel-mode,
 143         # or user-mode for some custom OS.  If the target supports TAS,
 144         # we can build our own spinlocks, given there are no signals.
 145         # If the target supports disabling interrupts, we can work in
 146         # kernel-mode, given the system is not multi-processor.
 147         UNSUPPORTED=1
 148         ;;
 149
 150   *)
 151         # Who are you?
 152         UNSUPPORTED=1
 153         ;;
 154 esac