libitm/configure.tgt

   1 # -*- shell-script -*-
   2 #   Copyright (C) 2011-2020 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 "${target}" in
  33
  34     *-*-musl*)
  35         ;;
  36
  37     # For x86, we use slots in the TCB head for most of our TLS.
  38     # The setup of those slots in beginTransaction can afford to
  39     # use the global-dynamic model.
  40     i[456]86-*-linux* | x86_64-*-linux*)
  41         ;;
  42
  43     *-*-linux*)
  44         XCFLAGS="${XCFLAGS} -ftls-model=initial-exec"
  45         ;;
  46
  47   esac
  48 fi
  49
  50 # Map the target cpu to an ARCH sub-directory.  At the same time,
  51 # work out any special compilation flags as necessary.
  52 case "${target_cpu}" in
  53   aarch64*)             ARCH=aarch64 ;;
  54   alpha*)               ARCH=alpha ;;
  55   rs6000 | powerpc*)
  56         XCFLAGS="${XCFLAGS} -mhtm"
  57         ARCH=powerpc
  58         ;;
  59
  60   arm*)         ARCH=arm ;;
  61
  62   i[3456]86)
  63         case " ${CC} ${CFLAGS} " in
  64           *" -m64 "*|*" -mx32 "*)
  65             ;;
  66           *)
  67             if test -z "$with_arch"; then
  68               XCFLAGS="${XCFLAGS} -march=i486 -mtune=${target_cpu}"
  69               XCFLAGS="${XCFLAGS} -fomit-frame-pointer"
  70             fi
  71         esac
  72         XCFLAGS="${XCFLAGS} -mrtm"
  73         ARCH=x86
  74         ;;
  75
  76   sh*)          ARCH=sh ;;
  77
  78   sparc)
  79         case " ${CC} ${CFLAGS} " in
  80           *" -m64 "*)
  81             ;;
  82           *)
  83             if test -z "$with_cpu"; then
  84               XCFLAGS="${XCFLAGS} -mcpu=v9"
  85             fi
  86         esac
  87         ARCH=sparc
  88         ;;
  89
  90   sparc64|sparcv9)
  91         case " ${CC} ${CFLAGS} " in
  92           *" -m32 "*)
  93             XCFLAGS="${XCFLAGS} -mcpu=v9"
  94             ;;
  95           *" -m64 "*)
  96             ;;
  97           *)
  98             if test "x$with_cpu" = xv8; then
  99               XCFLAGS="${XCFLAGS} -mcpu=v9"
 100             fi
 101             ;;
 102         esac
 103         ARCH=sparc
 104         ;;
 105
 106   x86_64)
 107         case " ${CC} ${CFLAGS} " in
 108           *" -m32 "*)
 109             XCFLAGS="${XCFLAGS} -march=i486 -mtune=generic"
 110             XCFLAGS="${XCFLAGS} -fomit-frame-pointer"
 111             ;;
 112         esac
 113         XCFLAGS="${XCFLAGS} -mrtm"
 114         ARCH=x86
 115         ;;
 116   s390|s390x)
 117         XCFLAGS="${XCFLAGS} -mzarch -mhtm"
 118         ARCH=s390
 119         ;;
 120
 121   *)
 122         ARCH="${target_cpu}"
 123         ;;
 124 esac
 125
 126 # For the benefit of top-level configure, determine if the cpu is supported.
 127 test -d ${srcdir}/config/$ARCH || UNSUPPORTED=1
 128
 129 # Since we require POSIX threads, assume a POSIX system by default.
 130 config_path="$ARCH posix generic"
 131
 132 # Other system configury
 133 case "${target}" in
 134   *-*-linux* | *-*-uclinux*)
 135         if test "$enable_linux_futex" = yes; then
 136           config_path="linux/$ARCH linux $config_path"
 137         fi
 138         ;;
 139
 140   powerpc*-*-aix* | rs6000-*-aix*)
 141         # The system ought to be supported, but sjlj.S has not been ported.
 142         UNSUPPORTED=1
 143         ;;
 144
 145   *-*-gnu* | *-*-k*bsd*-gnu \
 146   | *-*-netbsd* | *-*-freebsd* | *-*-openbsd* \
 147   | *-*-solaris2* | *-*-sysv4* | *-*-hpux11* \
 148   | *-*-aix* | *-*-dragonfly*)
 149         # POSIX system.  The OS is supported.
 150         ;;
 151
 152   *-*-darwin*)
 153         # The OS is supported, but we need dynamic lookup to support undefined
 154         # weak symbols at link-time.
 155         XLDFLAGS="${XLDFLAGS} -Wl,-undefined,dynamic_lookup"
 156         ;;
 157
 158   *)    # Non-POSIX, or embedded system
 159         UNSUPPORTED=1
 160         ;;
 161 esac