9
9
AC_SUBST([URCU_LIBRARY_VERSION], [1:0:0])
11
11
AC_CONFIG_AUX_DIR([config])
12
AC_CONFIG_MACRO_DIR([config])
12
13
AC_CANONICAL_TARGET
14
15
AM_INIT_AUTOMAKE([foreign dist-bzip2 no-dist-gzip])
15
16
m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
17
18
AC_CONFIG_SRCDIR([urcu.h])
20
20
AC_CONFIG_HEADERS([config.h urcu/config.h])
22
# Keep at the end to do not pollute installed header.
23
22
AH_TEMPLATE([CONFIG_RCU_SMP], [Enable SMP support. With SMP support enabled, uniprocessors are also supported. With SMP support disabled, UP systems work fine, but the behavior of SMP systems is undefined.])
24
23
AH_TEMPLATE([CONFIG_RCU_HAVE_FENCE], [Defined when on a system that has memory fence instructions.])
25
24
AH_TEMPLATE([CONFIG_RCU_HAVE_FUTEX], [Defined when on a system with futex support.])
26
AH_TEMPLATE([CONFIG_RCU_COMPAT_ARCH], [Compatibility mode for i386 which lacks
27
cmpxchg instruction.])
28
AH_TEMPLATE([CONFIG_RCU_ARM_HAVE_DMB], [Use the dmb instruction is available for use on ARM.])
25
AH_TEMPLATE([CONFIG_RCU_COMPAT_ARCH], [Compatibility mode for i386 which lacks cmpxchg instruction.])
26
AH_TEMPLATE([CONFIG_RCU_ARM_HAVE_DMB], [Use the dmb instruction if available for use on ARM.])
30
28
# Checks for programs.
43
41
AC_CHECK_FUNCS([bzero gettimeofday munmap sched_getcpu strtoul sysconf])
47
i386) ARCHTYPE="x86"; SUBARCHTYPE="x86compat" ;;
48
i486) ARCHTYPE="x86";;
49
i586) ARCHTYPE="x86";;
50
i686) ARCHTYPE="x86";;
51
amd64) ARCHTYPE="x86";;
52
x86_64) ARCHTYPE="x86";;
53
powerpc) ARCHTYPE="ppc" ;;
54
ppc64) ARCHTYPE="ppc" ;;
55
powerpc64) ARCHTYPE="ppc" ;;
56
ppc) ARCHTYPE="ppc" ;;
57
s390) ARCHTYPE="s390" ;;
58
s390x) ARCHTYPE="s390" ;;
59
sparc64) ARCHTYPE="sparc64" ;;
60
alpha*) ARCHTYPE="alpha" ;;
61
ia64) ARCHTYPE="gcc" ;;
62
arm*) ARCHTYPE="arm" ;;
63
*) ARCHTYPE="unknown";;
66
if test "x$ARCHTYPE" = "xarm" ; then
67
AC_MSG_CHECKING([checking for dmb instruction])
68
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
70
asm volatile("dmb":::"memory");
73
AC_DEFINE([CONFIG_RCU_ARM_HAVE_DMB], [1])
45
[i386], [ARCHTYPE="x86" && SUBARCHTYPE="x86compat"],
46
[i486], [ARCHTYPE="x86"],
47
[i586], [ARCHTYPE="x86"],
48
[i686], [ARCHTYPE="x86"],
49
[amd64], [ARCHTYPE="x86"],
50
[x86_64], [ARCHTYPE="x86"],
51
[powerpc], [ARCHTYPE="ppc"],
52
[ppc64], [ARCHTYPE="ppc"],
53
[powerpc64], [ARCHTYPE="ppc"],
54
[ppc], [ARCHTYPE="ppc"],
55
[s390], [ARCHTYPE="s390"],
56
[s390x], [ARCHTYPE="s390"],
57
[sparc64], [ARCHTYPE="sparc64"],
58
[alpha*], [ARCHTYPE="alpha"],
59
[ia64], [ARCHTYPE="gcc"],
60
[arm*], [ARCHTYPE="arm"],
81
67
UATOMICSRC=urcu/uatomic/$ARCHTYPE.h
82
68
ARCHSRC=urcu/arch/$ARCHTYPE.h
83
if test "$ARCHTYPE" == "armv7l"; then
84
CFLAGS="-mcpu=cortex-a9 -mtune=cortex-a9 -O"
91
#if test "x$ARCHTYPE" = "xx86" -a "x$host_cpu" != "xi386" -a "x$host_cpu" != "xi486" -a "x$host_cpu" != "xi586"; then
92
#For now, using lock; addl compatibility mode even for i686, because the
93
#Pentium III is seen as a i686, but lacks mfence instruction.
94
#Only using fence for x86_64.
95
if test "x$ARCHTYPE" = "xx86" -a "x$host_cpu" != "xi386" -a "x$host_cpu" != "xi486" -a "x$host_cpu" != "xi586" -a "x$host_cpu" != "xi686"; then
97
AC_DEFINE([CONFIG_RCU_HAVE_FENCE], [1])
102
AC_MSG_CHECKING([sys_futex()])
70
AS_IF([test "x$SUBARCHTYPE" = xx86compat],[
71
AC_DEFINE([CONFIG_RCU_COMPAT_ARCH], [1])
74
AS_IF([test "$host_cpu" = "armv7l"],[
75
CFLAGS="$CFLAGS -mcpu=cortex-a9 -mtune=cortex-a9 -O1"
79
AS_IF([test "x$ARCHTYPE" = "xarm"],[
80
AC_MSG_CHECKING([for dmb instruction])
81
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[asm volatile("dmb":::"memory");]])],[
83
AC_DEFINE([CONFIG_RCU_ARM_HAVE_DMB], [1])
90
AS_IF([test "x$ARCHTYPE" = "xx86"],[
91
AC_MSG_CHECKING([if architecture really supports the mfence instruction])
92
#For now, using lock; addl compatibility mode even for i686, because the
93
#Pentium III is seen as a i686, but lacks mfence instruction.
94
#Only using fence for x86_64.
95
AS_IF([test "x$host_cpu" != "xi386" -a "x$host_cpu" != "xi486" -a "x$host_cpu" != "xi586" -a "x$host_cpu" != "xi686"],[
97
AC_DEFINE([CONFIG_RCU_HAVE_FENCE], [1])
103
# Check if sys_futex() is available
104
AC_MSG_CHECKING([for sys_futex()])
103
105
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
104
#include <sys/syscall.h>
107
#error "futexes not available"
106
#include <sys/syscall.h>
109
#error "futexes not available"
110
113
AC_MSG_RESULT([yes])
111
114
AC_DEFINE([CONFIG_RCU_HAVE_FUTEX], [1])
112
115
compat_futex_test=0
115
117
AC_MSG_RESULT([no])
116
118
compat_futex_test=1
120
AM_CONDITIONAL([COMPAT_FUTEX], [ test "x$compat_futex_test" = "x1" ])
122
AM_CONDITIONAL([COMPAT_ARCH], [test "x$SUBARCHTYPE" = xx86compat ])
125
if test "x$SUBARCHTYPE" = xx86compat; then
127
AC_DEFINE([CONFIG_RCU_COMPAT_ARCH], [1])
132
AC_ARG_ENABLE([smp-support], [ --disable-smp-support Disable SMP support. Warning: only use this
133
on uniprocessor systems. [[default=enabled]]], [def_smp_support=$enableval], [def_smp_support="yes"])
136
if test "$def_smp_support" = "no"; then
137
echo "SMP support disabled."
140
AC_DEFINE([CONFIG_RCU_SMP], [1])
142
echo "SMP support enabled."
121
AM_CONDITIONAL([COMPAT_FUTEX], [test "x$compat_futex_test" = "x1"])
122
AM_CONDITIONAL([COMPAT_ARCH], [test "x$SUBARCHTYPE" = "xx86compat"])
124
# smp-support configure option
125
AC_ARG_ENABLE([smp-support],
126
AS_HELP_STRING([--disable-smp-support], [Disable SMP support. Warning: only use this on uniprocessor systems. [default=enabled]]),
127
[def_smp_support=$enableval],
128
[def_smp_support="yes"])
129
AS_IF([test "x$def_smp_support" = "xyes"], [AC_DEFINE([CONFIG_RCU_SMP], [1])])
146
132
# From the sched_setaffinity(2)'s man page:
169
155
# int sched_setaffinity (pid_t __pid, const cpu_set_t *__mask);
172
dnl Since we define _GNU_SOURCE in the sources, must do so too in the
173
dnl autoconf tests, as defining _GNU_SOURCE or not exposes
174
dnl sched_setaffinity bits differently.
158
# Since we define _GNU_SOURCE in the sources, must do so too in the
159
# autoconf tests, as defining _GNU_SOURCE or not exposes
160
# sched_setaffinity bits differently.
175
161
saved_CFLAGS=$CFLAGS
176
162
CFLAGS="$CFLAGS -D_GNU_SOURCE"
178
164
# First check if the function is available at all.
181
[ # Okay, we have it. Check if also have cpu_set_t. If we don't,
182
# then we have the first version using unsigned long, and no
183
# CPU_ZERO, etc. macros. If we do have cpu_set_t, we may have the
184
# version with 2 or 3 arguments. In that case, CPU_ZERO, etc.,
185
# should also be present, but we confirm nonetheless.
189
[ # We do have it. Confirm that we have CPU_ZERO, and it actually works.
190
AC_MSG_CHECKING([whether CPU_ZERO works])
191
AH_TEMPLATE([HAVE_CPU_ZERO],
192
[Define to 1 if we have CPU_ZERO and if it works])
197
[cpu_set_t foo; CPU_ZERO (&foo);])
200
AC_DEFINE(HAVE_CPU_ZERO, 1)
203
[AC_MSG_RESULT([no])]
206
# Check how many arguments does sched_setaffinity take.
208
AC_MSG_CHECKING([how many arguments sched_setaffinity takes])
211
[#include <sched.h>],
212
[cpu_set_t foo; sched_setaffinity (0, sizeof (foo), &foo);])
214
[sched_set_affinity_args=3],
215
[sched_set_affinity_args=2])
216
AC_DEFINE_UNQUOTED(SCHED_SETAFFINITY_ARGS, $sched_set_affinity_args,
217
[Define to sched_setaffinity's number of arguments.])
218
AC_MSG_RESULT([$sched_set_affinity_args])
220
[ # No cpu_set_t, always 3 args.
221
AC_DEFINE(SCHED_SETAFFINITY_ARGS, 3) ],
165
AC_CHECK_FUNCS([sched_setaffinity],[
166
# Okay, we have it. Check if also have cpu_set_t. If we don't,
167
# then we have the first version using unsigned long, and no
168
# CPU_ZERO, etc. macros. If we do have cpu_set_t, we may have the
169
# version with 2 or 3 arguments. In that case, CPU_ZERO, etc.,
170
# should also be present, but we confirm nonetheless.
172
AC_CHECK_TYPES([cpu_set_t],[
173
# We do have it. Confirm that we have CPU_ZERO, and it actually works.
174
AC_MSG_CHECKING([whether CPU_ZERO works])
175
AH_TEMPLATE([HAVE_CPU_ZERO], [Defined to 1 if we have CPU_ZERO and it works])
176
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
180
cpu_set_t foo; CPU_ZERO (&foo);
184
AC_DEFINE(HAVE_CPU_ZERO, 1)
190
# Check how many arguments does sched_setaffinity take.
192
AC_MSG_CHECKING([how many arguments sched_setaffinity takes])
193
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
197
sched_setaffinity (0, sizeof (foo), &foo);
200
[sched_set_affinity_args=3],
201
[sched_set_affinity_args=2])
202
AC_DEFINE_UNQUOTED(SCHED_SETAFFINITY_ARGS, $sched_set_affinity_args,
203
[Defined to sched_setaffinity's number of arguments.])
204
AC_MSG_RESULT([$sched_set_affinity_args])
206
# No cpu_set_t, always 3 args.
207
AC_DEFINE(SCHED_SETAFFINITY_ARGS, 3)
209
[#include <sched.h>])
227
212
CFLAGS=$saved_CFLAGS