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