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1 | # -*- shell-script -*- | |
2 | # Copyright (C) 2012-2021 Free Software Foundation, Inc. | |
3 | # Contributed by Richard Henderson <rth@redhat.com>. | |
4 | # | |
5 | # This file is part of the GNU Atomic Library (libatomic). | |
6 | # | |
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. | |
11 | # | |
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 | |
15 | # more details. | |
16 | # | |
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. | |
20 | # | |
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/>. | |
25 | ||
26 | # Map the target cpu to an ARCH sub-directory. At the same time, | |
27 | # work out any special compilation flags as necessary. | |
28 | ||
29 | # Give operating systems the opportunity to discard XCFLAGS modifications based | |
30 | # on ${target_cpu}. For example to allow proper use of multilibs. | |
31 | configure_tgt_pre_target_cpu_XCFLAGS="${XCFLAGS}" | |
32 | ||
33 | case "${target_cpu}" in | |
34 | alpha*) | |
35 | # fenv.c needs this option to generate inexact exceptions. | |
36 | XCFLAGS="${XCFLAGS} -mfp-trap-mode=sui" | |
37 | ARCH=alpha | |
38 | ;; | |
39 | rs6000 | powerpc*) ARCH=powerpc ;; | |
40 | riscv*) ARCH=riscv ;; | |
41 | sh*) ARCH=sh ;; | |
42 | ||
43 | aarch64*) | |
44 | ARCH=aarch64 | |
45 | case "${target}" in | |
46 | aarch64*-*-linux*) | |
47 | if test -n "$enable_aarch64_lse"; then | |
48 | try_ifunc=yes | |
49 | fi | |
50 | ;; | |
51 | esac | |
52 | ;; | |
53 | arm*) | |
54 | ARCH=arm | |
55 | case "${target}" in | |
56 | arm*-*-freebsd* | arm*-*-netbsd*) | |
57 | ;; | |
58 | *) | |
59 | # ??? Detect when -march=armv7 is already enabled. | |
60 | try_ifunc=yes | |
61 | ;; | |
62 | esac | |
63 | ;; | |
64 | sparc) | |
65 | case " ${CC} ${CFLAGS} " in | |
66 | *" -m64 "*) | |
67 | ;; | |
68 | *) | |
69 | if test -z "$with_cpu"; then | |
70 | XCFLAGS="${XCFLAGS} -mcpu=v9" | |
71 | fi | |
72 | esac | |
73 | ARCH=sparc | |
74 | ;; | |
75 | sparc64|sparcv9) | |
76 | case " ${CC} ${CFLAGS} " in | |
77 | *" -m32 "*) | |
78 | XCFLAGS="${XCFLAGS} -mcpu=v9" | |
79 | ;; | |
80 | esac | |
81 | ARCH=sparc | |
82 | ;; | |
83 | ||
84 | i[3456]86 | x86_64) | |
85 | cat > conftestx.c <<EOF | |
86 | #ifndef __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4 | |
87 | #error need -march=i486 | |
88 | #endif | |
89 | EOF | |
90 | if ${CC} ${CFLAGS} -E conftestx.c > /dev/null 2>&1; then | |
91 | : | |
92 | else | |
93 | if test "${target_cpu}" = x86_64; then | |
94 | XCFLAGS="${XCFLAGS} -march=i486 -mtune=generic" | |
95 | else | |
96 | XCFLAGS="${XCFLAGS} -march=i486 -mtune=${target_cpu}" | |
97 | fi | |
98 | XCFLAGS="${XCFLAGS} -fomit-frame-pointer" | |
99 | fi | |
100 | cat > conftestx.c <<EOF | |
101 | #ifdef __x86_64__ | |
102 | #ifndef __GCC_HAVE_SYNC_COMPARE_AND_SWAP_16 | |
103 | #error need -mcx16 | |
104 | #endif | |
105 | #else | |
106 | #ifndef __GCC_HAVE_SYNC_COMPARE_AND_SWAP_8 | |
107 | #error need -march=i686 | |
108 | #endif | |
109 | #endif | |
110 | EOF | |
111 | if ${CC} ${CFLAGS} -E conftestx.c > /dev/null 2>&1; then | |
112 | try_ifunc=no | |
113 | else | |
114 | try_ifunc=yes | |
115 | fi | |
116 | rm -f conftestx.c | |
117 | ARCH=x86 | |
118 | ;; | |
119 | ||
120 | *) ARCH="${target_cpu}" ;; | |
121 | esac | |
122 | ||
123 | # The cpu configury is always most relevant. | |
124 | if test -d ${srcdir}/config/$ARCH ; then | |
125 | config_path="$ARCH" | |
126 | fi | |
127 | ||
128 | tmake_file= | |
129 | # Other system configury | |
130 | case "${target}" in | |
131 | aarch64*-*-linux*) | |
132 | # OS support for atomic primitives. | |
133 | config_path="${config_path} linux/aarch64 posix" | |
134 | ;; | |
135 | ||
136 | arm*-*-linux* | arm*-*-uclinux*) | |
137 | # OS support for atomic primitives. | |
138 | config_path="${config_path} linux/arm posix" | |
139 | ;; | |
140 | ||
141 | s390*-*-linux*) | |
142 | # OS support for atomic primitives. | |
143 | config_path="${config_path} s390 posix" | |
144 | ;; | |
145 | ||
146 | powerpc*-*-aix*) | |
147 | config_path="${config_path} posix" | |
148 | tmake_file="t-aix" | |
149 | ;; | |
150 | ||
151 | *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu \ | |
152 | | *-*-netbsd* | *-*-freebsd* | *-*-openbsd* | *-*-dragonfly* \ | |
153 | | *-*-solaris2* | *-*-sysv4* | *-*-irix6* | *-*-osf* | *-*-hpux11* \ | |
154 | | *-*-darwin* | *-*-aix* | *-*-cygwin*) | |
155 | # POSIX system. The OS is supported. | |
156 | config_path="${config_path} posix" | |
157 | ;; | |
158 | ||
159 | *-*-mingw*) | |
160 | # OS support for atomic primitives. | |
161 | case ${target_thread_file} in | |
162 | win32) | |
163 | config_path="${config_path} mingw" | |
164 | ;; | |
165 | posix) | |
166 | config_path="${config_path} posix" | |
167 | ;; | |
168 | esac | |
169 | ;; | |
170 | ||
171 | *-*-rtems*) | |
172 | XCFLAGS="${configure_tgt_pre_target_cpu_XCFLAGS}" | |
173 | config_path="rtems" | |
174 | ;; | |
175 | ||
176 | *-*-elf*) | |
177 | # ??? No target OS. We could be targeting bare-metal kernel-mode, | |
178 | # or user-mode for some custom OS. If the target supports TAS, | |
179 | # we can build our own spinlocks, given there are no signals. | |
180 | # If the target supports disabling interrupts, we can work in | |
181 | # kernel-mode, given the system is not multi-processor. | |
182 | UNSUPPORTED=1 | |
183 | ;; | |
184 | ||
185 | nvptx*-*-*) | |
186 | ;; | |
187 | ||
188 | *) | |
189 | # Who are you? | |
190 | UNSUPPORTED=1 | |
191 | ;; | |
192 | esac | |
193 | ||
194 | # glibc will pass hwcap to ifunc resolver functions as an argument. | |
195 | # The type may be different on different architectures. | |
196 | case "${target}" in | |
197 | aarch64*-*-*) | |
198 | IFUNC_RESOLVER_ARGS="uint64_t hwcap" | |
199 | ;; | |
200 | *) | |
201 | IFUNC_RESOLVER_ARGS="void" | |
202 | ;; | |
203 | esac |