1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
|
# Copyright (c) 2005-2006 Hewlett-Packard Development Company, L.P.
# Copyright (c) 2009-2021 Ivan Maidanski
#
# THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
# OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
#
# Permission is hereby granted to use or copy this program
# for any purpose, provided the above notices are retained on all copies.
# Permission to modify the code and to distribute modified code is granted,
# provided the above notices are retained, and a notice that the code was
# modified is included with the above copyright notice.
dnl Process this file with autoconf to produce configure.
AC_INIT([libatomic_ops],[7.9.0],https://github.com/ivmai/libatomic_ops/issues)
AC_PREREQ(2.61)
AC_CANONICAL_TARGET([])
AC_CONFIG_SRCDIR(src/atomic_ops.c)
AC_CONFIG_MACRO_DIR([m4])
AM_INIT_AUTOMAKE([foreign nostdinc])
AM_MAINTAINER_MODE
AC_CONFIG_HEADERS([src/config.h])
dnl Checks for programs.
AM_PROG_CC_C_O
AM_PROG_AS
AC_PROG_INSTALL
LT_INIT([disable-shared])
dnl Checks for functions.
AC_FUNC_MMAP
# Determine PIC flag.
need_asm=false
PICFLAG=
AC_MSG_CHECKING(for PIC compiler flag)
if test "$GCC" = yes; then
old_CC="$CC"
if test -n "$CROSS_CC"; then
CC="$CROSS_CC"
fi
case "$host" in
*-*-cygwin* | *-*-mingw* | *-*-msys*)
# Cygwin and Mingw[-w32/64] do not need -fPIC.
AC_MSG_RESULT([not needed])
;;
*)
AC_MSG_RESULT(-fPIC)
PICFLAG=-fPIC
AC_MSG_CHECKING(whether -fPIC compiler option causes __PIC__ definition)
# Workaround: at least GCC 3.4.6 (Solaris) does not define this macro.
old_CFLAGS="$CFLAGS"
CFLAGS="$PICFLAG $CFLAGS"
AC_COMPILE_IFELSE(
[AC_LANG_SOURCE([
#ifndef __PIC__
# error
#endif
])], [ac_cv_pic_macro=yes], [ac_cv_pic_macro=no])
CFLAGS="$old_CFLAGS"
AC_MSG_RESULT($ac_cv_pic_macro)
AS_IF([test "$ac_cv_pic_macro" = yes], [],
[PICFLAG="-D__PIC__=1 $PICFLAG"])
;;
esac
# Output all warnings.
AC_MSG_CHECKING([whether compiler supports -Wextra])
old_CFLAGS="$CFLAGS"
CFLAGS="-Wextra $CFLAGS"
AC_COMPILE_IFELSE([AC_LANG_SOURCE([])],
[ac_cv_cc_wextra=yes], [ac_cv_cc_wextra=no])
CFLAGS="$old_CFLAGS"
AC_MSG_RESULT($ac_cv_cc_wextra)
AS_IF([test "$ac_cv_cc_wextra" = yes], [WEXTRA="-Wextra"], [WEXTRA="-W"])
AC_MSG_CHECKING([whether compiler supports -Wpedantic])
CFLAGS="-Wpedantic -Wno-long-long $CFLAGS"
AC_COMPILE_IFELSE([AC_LANG_SOURCE([
extern int quiet;
])], [ac_cv_cc_pedantic=yes], [ac_cv_cc_pedantic=no])
CFLAGS="$old_CFLAGS"
AC_MSG_RESULT($ac_cv_cc_pedantic)
WPEDANTIC=
AS_IF([test "$ac_cv_cc_pedantic" = yes],
[WPEDANTIC="-Wpedantic -Wno-long-long"])
CFLAGS="-Wall $WEXTRA $WPEDANTIC $CFLAGS"
AC_ARG_ENABLE(werror, [AS_HELP_STRING([--enable-werror],
[Pass -Werror to the C compiler])])
if test "$enable_werror" = yes; then
CFLAGS="-Werror $CFLAGS"
fi
CC="$old_CC"
else
case "$host" in
*-*-hpux*)
AC_MSG_RESULT([+Z])
PICFLAG="+Z"
CFLAGS="+O2 -mt $CFLAGS"
;;
*-*-solaris*)
AC_MSG_RESULT(-Kpic)
PICFLAG=-Kpic
CFLAGS="-O $CFLAGS"
need_asm=true
;;
*-*-linux*)
AC_MSG_RESULT(-fPIC)
PICFLAG=-fPIC
# Any Linux compiler had better be gcc compatible.
;;
*)
AC_MSG_RESULT([none])
;;
esac
fi
AC_ARG_ENABLE(assertions,
[AS_HELP_STRING([--enable-assertions], [Assertion checking])])
if test "$enable_assertions" != yes; then
AC_DEFINE([NDEBUG], 1, [Define to disable assertion checking.])
fi
AC_ARG_ENABLE(atomic-intrinsics,
[AS_HELP_STRING([--disable-atomic-intrinsics],
[Do not use GCC atomic intrinsics])])
if test "$enable_atomic_intrinsics" = no; then
AC_DEFINE([AO_DISABLE_GCC_ATOMICS], 1,
[Define to avoid GCC atomic intrinsics even if available.])
fi
AC_ARG_ENABLE(gcov, AS_HELP_STRING([--enable-gcov],
[Turn on code coverage analysis]))
if test "$enable_gcov" = "yes"; then
CFLAGS="$CFLAGS --coverage"
# Turn off code optimization to get accurate line numbers.
CFLAGS=`echo "$CFLAGS" | sed -e 's/-O\(1\|2\|3\|4\|s\|fast\)\?//g'`
fi
AC_ARG_ENABLE(gpl,
[AS_HELP_STRING([--disable-gpl],
[Do not build atomic_ops_gpl library])])
AM_CONDITIONAL(ENABLE_GPL, test x$enable_gpl != xno)
AC_ARG_ENABLE(docs,
[AS_HELP_STRING([--disable-docs],
[Do not build and install documentation])])
AM_CONDITIONAL(ENABLE_DOCS, test x$enable_docs != xno)
AC_SUBST(PICFLAG)
AC_SUBST(DEFS)
dnl Extra user-defined C flags.
AC_SUBST([CFLAGS_EXTRA])
AH_TEMPLATE([_PTHREADS], [Indicates the use of pthreads (NetBSD).])
AH_TEMPLATE([AO_USE_NANOSLEEP],
[Use nanosleep() instead of select() (only if atomic operations \
are emulated)])
AH_TEMPLATE([AO_USE_NO_SIGNALS],
[Do not block signals in compare_and_swap (only if atomic operations \
are emulated)])
AH_TEMPLATE([AO_USE_WIN32_PTHREADS],
[Use Win32 Sleep() instead of select() (only if atomic operations \
are emulated)])
AH_TEMPLATE([AO_TRACE_MALLOC], [Trace AO_malloc/free calls (for debug only)])
dnl These macros are tested in public headers.
AH_TEMPLATE([AO_GENERALIZE_ASM_BOOL_CAS],
[Force compare_and_swap definition via fetch_compare_and_swap])
AH_TEMPLATE([AO_PREFER_GENERALIZED],
[Prefer generalized definitions to direct assembly-based ones])
AH_TEMPLATE([AO_USE_PTHREAD_DEFS],
[Emulate atomic operations via slow and async-signal-unsafe \
pthread locking])
AH_TEMPLATE([AO_CMPXCHG16B_AVAILABLE],
[Assume target is not old AMD Opteron chip (only x86_64)])
AH_TEMPLATE([AO_FORCE_USE_SWP],
[Force test_and_set to use SWP instruction instead of LDREX/STREX \
(only arm v6+)])
AH_TEMPLATE([AO_NO_SPARC_V9], [Assume target is not sparc v9+ (only sparc)])
AH_TEMPLATE([AO_UNIPROCESSOR],
[Assume single-core target (only arm v6+ or GCC intrinsics)])
AH_TEMPLATE([AO_USE_PENTIUM4_INSTRS],
[Use Pentium 4 'mfence' instruction (only x86)])
AH_TEMPLATE([AO_USE_SYNC_CAS_BUILTIN],
[Prefer GCC built-in CAS intrinsics in favor of inline assembly \
(only gcc/x86, gcc/x86_64)])
AH_TEMPLATE([AO_WEAK_DOUBLE_CAS_EMULATION],
[Emulate double-width CAS via pthread locking in case of no hardware \
support (only gcc/x86_64, the emulation is unsafe)])
AH_TEMPLATE([AO_PREFER_BUILTIN_ATOMICS],
[Prefer GCC atomic intrinsics over assembly-based implementation \
even in case of inefficient implementation (do not use assembly for \
any atomic_ops primitive if the atomic intrinsics are available)])
AC_DEFINE(_REENTRANT, 1, [Required define if using POSIX threads.])
# Libraries needed to support threads (if any).
have_pthreads=false
AC_CHECK_LIB(pthread, pthread_self, have_pthreads=true)
if test x$have_pthreads = xtrue; then
THREADDLLIBS=-lpthread
case "$host" in
*-*-netbsd*)
# Indicates the use of pthreads.
AC_DEFINE(_PTHREADS)
;;
*-*-openbsd* | *-*-kfreebsd*-gnu | *-*-dgux*)
THREADDLLIBS=-pthread
;;
*-*-cygwin* | *-*-darwin*)
# Cygwin does not have a real libpthread, so Libtool cannot link
# against it.
THREADDLLIBS=
;;
*-*-mingw* | *-*-msys*)
# Use Win32 threads for tests anyway.
THREADDLLIBS=
# Skip test_atomic_pthreads.
have_pthreads=false
;;
esac
else
AC_DEFINE([AO_NO_PTHREADS], 1, [No pthreads library available])
# Assume VxWorks or Win32.
THREADDLLIBS=
fi
AC_SUBST(THREADDLLIBS)
# AO API symbols export control.
# Compile with AO_DLL defined unless building static libraries.
if test x$enable_shared = xyes -a x$enable_static = xno; then
CFLAGS="-DAO_DLL $CFLAGS"
fi
AM_CONDITIONAL(ENABLE_SHARED, test x$enable_shared = xyes)
AM_CONDITIONAL(HAVE_PTHREAD_H, test x$have_pthreads = xtrue)
AM_CONDITIONAL(NEED_ASM, test x$need_asm = xtrue)
AC_CONFIG_FILES([
Makefile
src/Makefile
tests/Makefile
pkgconfig/atomic_ops.pc
pkgconfig/atomic_ops-uninstalled.pc ])
AC_CONFIG_COMMANDS([default],[[]],[[
PICFLAG="${PICFLAG}"
CC="${CC}"
DEFS="${DEFS}"
]])
AC_OUTPUT
|
