2 # Copyright (C) 2012-2014 Free Software Foundation, Inc.
3 # Contributed by Richard Henderson <rth@redhat.com>.
5 # This file is part of the GNU Atomic Library (libatomic).
7 # Libatomic is free software; you can redistribute it and/or modify it
8 # under the terms of the GNU General Public License as published by
9 # the Free Software Foundation; either version 3 of the License, or
10 # (at your option) any later version.
12 # Libatomic is distributed in the hope that it will be useful, but WITHOUT ANY
13 # WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
14 # FOR A PARTICULAR PURPOSE. See the GNU General Public License for
17 # Under Section 7 of GPL version 3, you are granted additional
18 # permissions described in the GCC Runtime Library Exception, version
19 # 3.1, as published by the Free Software Foundation.
21 # You should have received a copy of the GNU General Public License and
22 # a copy of the GCC Runtime Library Exception along with this program;
23 # see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
24 # <http://www.gnu.org/licenses/>.
26 # Map the target cpu to an ARCH sub-directory. At the same time,
27 # work out any special compilation flags as necessary.
29 case "${target_cpu}" in
31 # fenv.c needs this option to generate inexact exceptions.
32 XCFLAGS="${XCFLAGS} -mfp-trap-mode=sui"
35 rs6000 | powerpc*) ARCH=powerpc ;;
40 # ??? Detect when -march=armv7 is already enabled.
45 case " ${CC} ${CFLAGS} " in
49 if test -z "$with_cpu"; then
50 XCFLAGS="${XCFLAGS} -mcpu=v9"
56 case " ${CC} ${CFLAGS} " in
58 XCFLAGS="${XCFLAGS} -mcpu=v9"
65 case " ${CC} ${CFLAGS} " in
66 *" -m64 "*|*" -mx32 "*)
69 if test -z "$with_arch"; then
70 XCFLAGS="${XCFLAGS} -march=i486 -mtune=${target_cpu}"
71 XCFLAGS="${XCFLAGS} -fomit-frame-pointer"
75 # ??? Detect when -march=i686 is already enabled.
79 case " ${CC} ${CFLAGS} " in
81 XCFLAGS="${XCFLAGS} -march=i486 -mtune=generic"
82 XCFLAGS="${XCFLAGS} -fomit-frame-pointer"
88 # ??? Detect when -mcx16 is already enabled.
92 *) ARCH="${target_cpu}" ;;
95 # The cpu configury is always most relevant.
96 if test -d ${srcdir}/config/$ARCH ; then
100 # Other system configury
103 # OS support for atomic primitives.
104 config_path="${config_path} linux/arm posix"
107 *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu \
108 | *-*-netbsd* | *-*-freebsd* | *-*-openbsd* \
109 | *-*-solaris2* | *-*-sysv4* | *-*-irix6* | *-*-osf* | *-*-hpux11* \
110 | *-*-darwin* | *-*-aix* | *-*-cygwin*)
111 # POSIX system. The OS is supported.
112 config_path="${config_path} posix"
116 # OS support for atomic primitives.
117 case ${target_thread_file} in
119 config_path="${config_path} mingw"
122 config_path="${config_path} posix"
127 # ??? No target OS. We could be targeting bare-metal kernel-mode,
128 # or user-mode for some custom OS. If the target supports TAS,
129 # we can build our own spinlocks, given there are no signals.
130 # If the target supports disabling interrupts, we can work in
131 # kernel-mode, given the system is not multi-processor.