libatomic/configure.tgt

   1 # -*- shell-script -*-
   2 #  Copyright (C) 2012-2019 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   riscv*)               ARCH=riscv ;;
  41   sh*)                  ARCH=sh ;;
  42
  43   aarch64*)
  44         ARCH=aarch64
  45         case "${target}" in
  46             aarch64*-*-linux*)
  47                 if test -n "$enable_aarch64_lse"; then
  48                     try_ifunc=yes
  49                 fi
  50                 ;;
  51         esac
  52         ;;
  53   arm*)
  54         ARCH=arm
  55         case "${target}" in
  56             arm*-*-freebsd* | arm*-*-netbsd*)
  57                 ;;
  58             *)
  59                 # ??? Detect when -march=armv7 is already enabled.
  60                 try_ifunc=yes
  61                 ;;
  62         esac
  63         ;;
  64   sparc)
  65         case " ${CC} ${CFLAGS} " in
  66           *" -m64 "*)
  67             ;;
  68           *)
  69             if test -z "$with_cpu"; then
  70               XCFLAGS="${XCFLAGS} -mcpu=v9"
  71             fi
  72         esac
  73         ARCH=sparc
  74         ;;
  75   sparc64|sparcv9)
  76         case " ${CC} ${CFLAGS} " in
  77           *" -m32 "*)
  78             XCFLAGS="${XCFLAGS} -mcpu=v9"
  79             ;;
  80         esac
  81         ARCH=sparc
  82         ;;
  83
  84   i[3456]86)
  85         case " ${CC} ${CFLAGS} " in
  86           *" -m64 "*|*" -mx32 "*)
  87             ;;
  88           *)
  89             if test -z "$with_arch"; then
  90               XCFLAGS="${XCFLAGS} -march=i486 -mtune=${target_cpu}"
  91               XCFLAGS="${XCFLAGS} -fomit-frame-pointer"
  92             fi
  93         esac
  94         ARCH=x86
  95         # ??? Detect when -march=i686 is already enabled.
  96         try_ifunc=yes
  97         ;;
  98   x86_64)
  99         case " ${CC} ${CFLAGS} " in
 100           *" -m32 "*)
 101             XCFLAGS="${XCFLAGS} -march=i486 -mtune=generic"
 102             XCFLAGS="${XCFLAGS} -fomit-frame-pointer"
 103             ;;
 104           *)
 105             ;;
 106         esac
 107         ARCH=x86
 108         # ??? Detect when -mcx16 is already enabled.
 109         try_ifunc=yes
 110         ;;
 111
 112   *)                    ARCH="${target_cpu}" ;;
 113 esac
 114
 115 # The cpu configury is always most relevant.
 116 if test -d ${srcdir}/config/$ARCH ; then
 117   config_path="$ARCH"
 118 fi
 119
 120 # Other system configury
 121 case "${target}" in
 122   aarch64*-*-linux*)
 123         # OS support for atomic primitives.
 124         config_path="${config_path} linux/aarch64 posix"
 125         ;;
 126
 127   arm*-*-linux*)
 128         # OS support for atomic primitives.
 129         config_path="${config_path} linux/arm posix"
 130         ;;
 131
 132   s390*-*-linux*)
 133         # OS support for atomic primitives.
 134         config_path="${config_path} s390 posix"
 135         ;;
 136
 137   *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu \
 138   | *-*-netbsd* | *-*-freebsd* | *-*-openbsd* | *-*-dragonfly* \
 139   | *-*-solaris2* | *-*-sysv4* | *-*-irix6* | *-*-osf* | *-*-hpux11* \
 140   | *-*-darwin* | *-*-aix* | *-*-cygwin*)
 141         # POSIX system.  The OS is supported.
 142         config_path="${config_path} posix"
 143         ;;
 144
 145   *-*-mingw*)
 146         # OS support for atomic primitives.
 147         case ${target_thread_file} in
 148           win32)
 149             config_path="${config_path} mingw"
 150             ;;
 151           posix)
 152             config_path="${config_path} posix"
 153             ;;
 154         esac
 155         ;;
 156
 157   *-*-rtems*)
 158         XCFLAGS="${configure_tgt_pre_target_cpu_XCFLAGS}"
 159         config_path="rtems"
 160         ;;
 161
 162   *-*-elf*)
 163         # ??? No target OS.  We could be targeting bare-metal kernel-mode,
 164         # or user-mode for some custom OS.  If the target supports TAS,
 165         # we can build our own spinlocks, given there are no signals.
 166         # If the target supports disabling interrupts, we can work in
 167         # kernel-mode, given the system is not multi-processor.
 168         UNSUPPORTED=1
 169         ;;
 170
 171   *)
 172         # Who are you?
 173         UNSUPPORTED=1
 174         ;;
 175 esac
 176
 177 # glibc will pass hwcap to ifunc resolver functions as an argument.
 178 # The type may be different on different architectures.
 179 case "${target}" in
 180   aarch64*-*-*)
 181         IFUNC_RESOLVER_ARGS="uint64_t hwcap"
 182         ;;
 183   *)
 184         IFUNC_RESOLVER_ARGS="void"
 185         ;;
 186 esac