libitm/configure.tgt

   1 # -*- shell-script -*-
   2 #   Copyright (C) 2011-2019 Free Software Foundation, Inc.
   3
   4 # This program is free software; you can redistribute it and/or modify
   5 # it under the terms of the GNU General Public License as published by
   6 # the Free Software Foundation; either version 2 of the License, or
   7 # (at your option) any later version.
   8 #
   9 # This program is distributed in the hope that it will be useful,
  10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 # GNU General Public License for more details.
  13 #
  14 # You should have received a copy of the GNU General Public License
  15 # along with this program; if not, write to the Free Software
  16 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  17
  18 # This is the target specific configuration file.  This is invoked by the
  19 # autoconf generated configure script.  Putting it in a separate shell file
  20 # lets us skip running autoconf when modifying target specific information.
  21
  22 # This file switches on the shell variable ${target}, and sets the
  23 # following shell variables:
  24 #  config_path          An ordered list of directories to search for
  25 #                       sources and headers.  This is relative to the
  26 #                       config subdirectory of the source tree.
  27 #  XCFLAGS              Add extra compile flags to use.
  28 #  XLDFLAGS             Add extra link flags to use.
  29
  30 # Optimize TLS usage by avoiding the overhead of dynamic allocation.
  31 if test "$gcc_cv_have_tls" = yes ; then
  32   case "${target}" in
  33
  34     # For x86, we use slots in the TCB head for most of our TLS.
  35     # The setup of those slots in beginTransaction can afford to
  36     # use the global-dynamic model.
  37     i[456]86-*-linux* | x86_64-*-linux*)
  38         ;;
  39
  40     *-*-linux*)
  41         XCFLAGS="${XCFLAGS} -ftls-model=initial-exec"
  42         ;;
  43   esac
  44 fi
  45
  46 # Map the target cpu to an ARCH sub-directory.  At the same time,
  47 # work out any special compilation flags as necessary.
  48 case "${target_cpu}" in
  49   aarch64*)             ARCH=aarch64 ;;
  50   alpha*)               ARCH=alpha ;;
  51   rs6000 | powerpc*)
  52         XCFLAGS="${XCFLAGS} -mhtm"
  53         ARCH=powerpc
  54         ;;
  55
  56   arm*)         ARCH=arm ;;
  57
  58   i[3456]86)
  59         case " ${CC} ${CFLAGS} " in
  60           *" -m64 "*|*" -mx32 "*)
  61             ;;
  62           *)
  63             if test -z "$with_arch"; then
  64               XCFLAGS="${XCFLAGS} -march=i486 -mtune=${target_cpu}"
  65               XCFLAGS="${XCFLAGS} -fomit-frame-pointer"
  66             fi
  67         esac
  68         XCFLAGS="${XCFLAGS} -mrtm"
  69         ARCH=x86
  70         ;;
  71
  72   sh*)          ARCH=sh ;;
  73
  74   sparc)
  75         case " ${CC} ${CFLAGS} " in
  76           *" -m64 "*)
  77             ;;
  78           *)
  79             if test -z "$with_cpu"; then
  80               XCFLAGS="${XCFLAGS} -mcpu=v9"
  81             fi
  82         esac
  83         ARCH=sparc
  84         ;;
  85
  86   sparc64|sparcv9)
  87         case " ${CC} ${CFLAGS} " in
  88           *" -m32 "*)
  89             XCFLAGS="${XCFLAGS} -mcpu=v9"
  90             ;;
  91           *" -m64 "*)
  92             ;;
  93           *)
  94             if test "x$with_cpu" = xv8; then
  95               XCFLAGS="${XCFLAGS} -mcpu=v9"
  96             fi
  97             ;;
  98         esac
  99         ARCH=sparc
 100         ;;
 101
 102   x86_64)
 103         case " ${CC} ${CFLAGS} " in
 104           *" -m32 "*)
 105             XCFLAGS="${XCFLAGS} -march=i486 -mtune=generic"
 106             XCFLAGS="${XCFLAGS} -fomit-frame-pointer"
 107             ;;
 108         esac
 109         XCFLAGS="${XCFLAGS} -mrtm"
 110         ARCH=x86
 111         ;;
 112   s390|s390x)
 113         XCFLAGS="${XCFLAGS} -mzarch -mhtm"
 114         ARCH=s390
 115         ;;
 116
 117   *)
 118         ARCH="${target_cpu}"
 119         ;;
 120 esac
 121
 122 # For the benefit of top-level configure, determine if the cpu is supported.
 123 test -d ${srcdir}/config/$ARCH || UNSUPPORTED=1
 124
 125 # Since we require POSIX threads, assume a POSIX system by default.
 126 config_path="$ARCH posix generic"
 127
 128 # Other system configury
 129 case "${target}" in
 130   *-*-linux* | *-*-uclinux*)
 131         if test "$enable_linux_futex" = yes; then
 132           config_path="linux/$ARCH linux $config_path"
 133         fi
 134         ;;
 135
 136   powerpc*-*-aix* | rs6000-*-aix*)
 137         # The system ought to be supported, but sjlj.S has not been ported.
 138         UNSUPPORTED=1
 139         ;;
 140
 141   *-*-gnu* | *-*-k*bsd*-gnu \
 142   | *-*-netbsd* | *-*-freebsd* | *-*-openbsd* \
 143   | *-*-solaris2* | *-*-sysv4* | *-*-hpux11* \
 144   | *-*-darwin* | *-*-aix* | *-*-dragonfly*)
 145         # POSIX system.  The OS is supported.
 146         ;;
 147
 148   *)    # Non-POSIX, or embedded system
 149         UNSUPPORTED=1
 150         ;;
 151 esac