1# -*- shell-script -*-
2#   Copyright (C) 2011-2021 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 "${target}" in
33
34    *-*-musl*)
35	;;
36
37    # For x86, we use slots in the TCB head for most of our TLS.
38    # The setup of those slots in beginTransaction can afford to
39    # use the global-dynamic model.
40    i[456]86-*-linux* | x86_64-*-linux*)
41	;;
42
43    *-*-linux*)
44	XCFLAGS="${XCFLAGS} -ftls-model=initial-exec"
45	;;
46
47  esac
48fi
49
50# Map the target cpu to an ARCH sub-directory.  At the same time,
51# work out any special compilation flags as necessary.
52case "${target_cpu}" in
53  aarch64*)		ARCH=aarch64 ;;
54  alpha*)		ARCH=alpha ;;
55  rs6000 | powerpc*)
56	XCFLAGS="${XCFLAGS} -mhtm"
57	ARCH=powerpc
58	;;
59
60  arm*)		ARCH=arm ;;
61
62  i[3456]86 | x86_64)
63	cat > conftestx.c <<EOF
64#ifndef __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4
65#error need -march=i486
66#endif
67EOF
68	if ${CC} ${CFLAGS} -E conftestx.c > /dev/null 2>&1; then
69	  :
70	else
71	  if test "${target_cpu}" = x86_64; then
72	    XCFLAGS="${XCFLAGS} -march=i486 -mtune=generic"
73	  else
74	    XCFLAGS="${XCFLAGS} -march=i486 -mtune=${target_cpu}"
75	  fi
76	  XCFLAGS="${XCFLAGS} -fomit-frame-pointer"
77	fi
78	rm -f conftestx.c
79	XCFLAGS="${XCFLAGS} -mrtm"
80	ARCH=x86
81	;;
82
83  sh*)		ARCH=sh ;;
84
85  sparc)
86	case " ${CC} ${CFLAGS} " in
87	  *" -m64 "*)
88	    ;;
89	  *)
90	    if test -z "$with_cpu"; then
91	      XCFLAGS="${XCFLAGS} -mcpu=v9"
92	    fi
93	esac
94	ARCH=sparc
95	;;
96
97  sparc64|sparcv9)
98	case " ${CC} ${CFLAGS} " in
99	  *" -m32 "*)
100	    XCFLAGS="${XCFLAGS} -mcpu=v9"
101	    ;;
102	  *" -m64 "*)
103	    ;;
104	  *)
105	    if test "x$with_cpu" = xv8; then
106	      XCFLAGS="${XCFLAGS} -mcpu=v9"
107	    fi
108	    ;;
109	esac
110	ARCH=sparc
111	;;
112
113  s390|s390x)
114	XCFLAGS="${XCFLAGS} -mzarch -mhtm"
115	ARCH=s390
116	;;
117
118  *)
119	ARCH="${target_cpu}"
120	;;
121esac
122
123# For the benefit of top-level configure, determine if the cpu is supported.
124test -d ${srcdir}/config/$ARCH || UNSUPPORTED=1
125
126# Since we require POSIX threads, assume a POSIX system by default.
127config_path="$ARCH posix generic"
128
129# Other system configury
130case "${target}" in
131  *-*-linux* | *-*-uclinux*)
132	if test "$enable_linux_futex" = yes; then
133	  config_path="linux/$ARCH linux $config_path"
134	fi
135	;;
136
137  powerpc*-*-aix* | rs6000-*-aix*)
138	# The system ought to be supported, but sjlj.S has not been ported.
139	UNSUPPORTED=1
140	;;
141
142  *-*-gnu* | *-*-k*bsd*-gnu \
143  | *-*-netbsd* | *-*-freebsd* | *-*-openbsd* \
144  | *-*-solaris2* | *-*-sysv4* | *-*-hpux11* \
145  | *-*-aix* | *-*-dragonfly*)
146	# POSIX system.  The OS is supported.
147	;;
148
149  *-*-darwin*)
150	# The OS is supported, but we need dynamic lookup to support undefined
151	# weak symbols at link-time.
152	XLDFLAGS="${XLDFLAGS} -Wl,-undefined,dynamic_lookup"
153	;;
154
155  *)	# Non-POSIX, or embedded system
156	UNSUPPORTED=1
157	;;
158esac
159