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1 # -*- shell-script -*-
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2 # Copyright (C) 2011-2017 Free Software Foundation, Inc.
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3
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4 # This program is free software; you can redistribute it and/or modify
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5 # it under the terms of the GNU General Public License as published by
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6 # the Free Software Foundation; either version 2 of the License, or
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7 # (at your option) any later version.
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8 #
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9 # This program is distributed in the hope that it will be useful,
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10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 # GNU General Public License for more details.
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13 #
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14 # You should have received a copy of the GNU General Public License
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15 # along with this program; if not, write to the Free Software
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16 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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17
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18 # This is the target specific configuration file. This is invoked by the
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19 # autoconf generated configure script. Putting it in a separate shell file
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20 # lets us skip running autoconf when modifying target specific information.
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21
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22 # This file switches on the shell variable ${target}, and sets the
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23 # following shell variables:
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24 # config_path An ordered list of directories to search for
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25 # sources and headers. This is relative to the
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26 # config subdirectory of the source tree.
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27 # XCFLAGS Add extra compile flags to use.
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28 # XLDFLAGS Add extra link flags to use.
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29
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30 # Optimize TLS usage by avoiding the overhead of dynamic allocation.
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31 if test "$gcc_cv_have_tls" = yes ; then
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32 case "${target}" in
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33
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34 # For x86, we use slots in the TCB head for most of our TLS.
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35 # The setup of those slots in beginTransaction can afford to
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36 # use the global-dynamic model.
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37 i[456]86-*-linux* | x86_64-*-linux*)
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38 ;;
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39
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40 *-*-linux*)
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41 XCFLAGS="${XCFLAGS} -ftls-model=initial-exec"
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42 ;;
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43 esac
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44 fi
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45
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46 # Map the target cpu to an ARCH sub-directory. At the same time,
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47 # work out any special compilation flags as necessary.
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48 case "${target_cpu}" in
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49 aarch64*) ARCH=aarch64 ;;
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50 alpha*) ARCH=alpha ;;
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51 rs6000 | powerpc*)
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52 XCFLAGS="${XCFLAGS} -mhtm"
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53 ARCH=powerpc
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54 ;;
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55
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56 arm*) ARCH=arm ;;
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57
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58 i[3456]86)
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59 case " ${CC} ${CFLAGS} " in
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60 *" -m64 "*|*" -mx32 "*)
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61 ;;
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62 *)
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63 if test -z "$with_arch"; then
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64 XCFLAGS="${XCFLAGS} -march=i486 -mtune=${target_cpu}"
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65 XCFLAGS="${XCFLAGS} -fomit-frame-pointer"
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66 fi
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67 esac
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68 XCFLAGS="${XCFLAGS} -mrtm"
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69 ARCH=x86
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70 ;;
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71
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72 sh*) ARCH=sh ;;
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73
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74 sparc)
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75 case " ${CC} ${CFLAGS} " in
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76 *" -m64 "*)
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77 ;;
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78 *)
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79 if test -z "$with_cpu"; then
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80 XCFLAGS="${XCFLAGS} -mcpu=v9"
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81 fi
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82 esac
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83 ARCH=sparc
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84 ;;
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85
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86 sparc64|sparcv9)
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87 case " ${CC} ${CFLAGS} " in
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88 *" -m32 "*)
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89 XCFLAGS="${XCFLAGS} -mcpu=v9"
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90 ;;
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91 *" -m64 "*)
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92 ;;
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93 *)
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94 if test "x$with_cpu" = xv8; then
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95 XCFLAGS="${XCFLAGS} -mcpu=v9"
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96 fi
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97 ;;
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98 esac
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99 ARCH=sparc
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100 ;;
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101
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102 x86_64)
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103 case " ${CC} ${CFLAGS} " in
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104 *" -m32 "*)
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105 XCFLAGS="${XCFLAGS} -march=i486 -mtune=generic"
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106 XCFLAGS="${XCFLAGS} -fomit-frame-pointer"
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107 ;;
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108 esac
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109 XCFLAGS="${XCFLAGS} -mrtm"
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110 ARCH=x86
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111 ;;
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112 s390|s390x)
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113 XCFLAGS="${XCFLAGS} -mzarch -mhtm"
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114 ARCH=s390
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115 ;;
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116
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117 *)
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118 ARCH="${target_cpu}"
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119 ;;
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120 esac
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121
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122 # For the benefit of top-level configure, determine if the cpu is supported.
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123 test -d ${srcdir}/config/$ARCH || UNSUPPORTED=1
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124
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125 # Since we require POSIX threads, assume a POSIX system by default.
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126 config_path="$ARCH posix generic"
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127
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128 # Other system configury
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129 case "${target}" in
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130 *-*-linux*)
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131 if test "$enable_linux_futex" = yes; then
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132 config_path="linux/$ARCH linux $config_path"
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133 fi
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134 ;;
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135
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136 powerpc*-*-aix* | rs6000-*-aix*)
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137 # The system ought to be supported, but sjlj.S has not been ported.
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138 UNSUPPORTED=1
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139 ;;
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140
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141 *-*-gnu* | *-*-k*bsd*-gnu \
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142 | *-*-netbsd* | *-*-freebsd* | *-*-openbsd* \
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143 | *-*-solaris2* | *-*-sysv4* | *-*-hpux11* \
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144 | *-*-darwin* | *-*-aix* | *-*-dragonfly*)
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145 # POSIX system. The OS is supported.
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146 ;;
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147
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148 *) # Non-POSIX, or embedded system
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149 UNSUPPORTED=1
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150 ;;
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151 esac
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