1# -*- shell-script -*-
2#   Copyright (C) 2011-2018 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 "${target_cpu}" in
49  aarch64*)		ARCH=aarch64 ;;
50  alpha*)		ARCH=alpha ;;
51  rs6000 | powerpc*)
52	XCFLAGS="${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	;;
120esac
121
122# For the benefit of top-level configure, determine if the cpu is supported.
123test -d ${srcdir}/config/$ARCH || UNSUPPORTED=1
124
125# Since we require POSIX threads, assume a POSIX system by default.
126config_path="$ARCH posix generic"
127
128# Other system configury
129case "${target}" in
130  *-*-linux*)
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	;;
151esac
152