1# -*- shell-script -*-
2#   Copyright (C) 2011-2013 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 ${target}, and sets the
23# following shell variables:
24#  config_path		An ordered list of directories to search for
25#			sources and headers.  This is relative to the
26#			config subdirectory of the source tree.
27#  XCFLAGS		Add extra compile flags to use.
28#  XLDFLAGS		Add extra link flags to use.
29
30# Optimize TLS usage by avoiding the overhead of dynamic allocation.
31if test "$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
44fi
45
46# Map the target cpu to an ARCH sub-directory.  At the same time,
47# work out any special compilation flags as necessary.
48case "${target_cpu}" in
49  alpha*)		ARCH=alpha ;;
50  rs6000 | powerpc*)	ARCH=powerpc ;;
51
52  arm*)		ARCH=arm ;;
53
54  i[3456]86)
55	case " ${CC} ${CFLAGS} " in
56	  *" -m64 "*|*" -mx32 "*)
57	    ;;
58	  *)
59	    if test -z "$with_arch"; then
60	      XCFLAGS="${XCFLAGS} -march=i486 -mtune=${target_cpu}"
61	      XCFLAGS="${XCFLAGS} -fomit-frame-pointer"
62	    fi
63	esac
64	XCFLAGS="${XCFLAGS} -mrtm"
65	ARCH=x86
66	;;
67
68  sh*)		ARCH=sh ;;
69
70  sparc)
71	case " ${CC} ${CFLAGS} " in
72	  *" -m64 "*)
73	    ;;
74	  *)
75	    if test -z "$with_cpu"; then
76	      XCFLAGS="${XCFLAGS} -mcpu=v9"
77	    fi
78	esac
79	ARCH=sparc
80	;;
81
82  sparc64|sparcv9)
83	case " ${CC} ${CFLAGS} " in
84	  *" -m32 "*)
85	    XCFLAGS="${XCFLAGS} -mcpu=v9"
86	    ;;
87	  *" -m64 "*)
88	    ;;
89	  *)
90	    if test "x$with_cpu" = xv8; then
91	      XCFLAGS="${XCFLAGS} -mcpu=v9"
92	    fi
93	    ;;
94	esac
95	ARCH=sparc
96	;;
97
98  x86_64)
99	case " ${CC} ${CFLAGS} " in
100	  *" -m32 "*)
101	    XCFLAGS="${XCFLAGS} -march=i486 -mtune=i686"
102	    XCFLAGS="${XCFLAGS} -fomit-frame-pointer"
103	    ;;
104	esac
105	XCFLAGS="${XCFLAGS} -mrtm"
106	ARCH=x86
107	;;
108
109  *)
110	ARCH="${target_cpu}"
111	;;
112esac
113
114# For the benefit of top-level configure, determine if the cpu is supported.
115test -d ${srcdir}/config/$ARCH || UNSUPPORTED=1
116
117# Since we require POSIX threads, assume a POSIX system by default.
118config_path="$ARCH posix generic"
119
120# Other system configury
121case "${target}" in
122  *-*-linux*)
123	if test "$enable_linux_futex" = yes; then
124	  config_path="linux/$ARCH linux $config_path"
125	fi
126	;;
127
128  powerpc*-*-aix* | rs6000-*-aix*)
129	# The system ought to be supported, but sjlj.S has not been ported.
130	UNSUPPORTED=1
131	;;
132
133  *-*-gnu* | *-*-k*bsd*-gnu \
134  | *-*-netbsd* | *-*-freebsd* | *-*-openbsd* \
135  | *-*-solaris2* | *-*-sysv4* | *-*-hpux11* \
136  | *-*-darwin* | *-*-aix*)
137	# POSIX system.  The OS is supported.
138	;;
139
140  *)	# Non-POSIX, or embedded system
141	UNSUPPORTED=1
142	;;
143esac
144