| 1 |
use strict qw(vars subs); |
| 2 |
use Canary::Stability EV => 1, 5.008002; |
| 3 |
use Config; |
| 4 |
use ExtUtils::MakeMaker; |
| 5 |
|
| 6 |
sub have_inc($) { |
| 7 |
scalar grep -r "$_/$_[0]", $Config{usrinc}, split / /, $Config{incpth} |
| 8 |
} |
| 9 |
|
| 10 |
my $DEFINE; |
| 11 |
|
| 12 |
unless (-e "libev/ev_linuxaio.c") { |
| 13 |
print <<EOF; |
| 14 |
|
| 15 |
*** |
| 16 |
*** ERROR: libev is missing or damaged. If you used a CVS check-out of EV, |
| 17 |
*** you also have to check-out the "libev" module from the same CVS |
| 18 |
*** repository into the EV dir (i.e. EV/libev from outside). |
| 19 |
*** |
| 20 |
|
| 21 |
EOF |
| 22 |
exit 1; |
| 23 |
} |
| 24 |
|
| 25 |
print <<EOF; |
| 26 |
|
| 27 |
*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** |
| 28 |
|
| 29 |
|
| 30 |
Welcome to EV configuration. If you are in a hurry, just press return here |
| 31 |
and hope for the best. The defaults should usually do. |
| 32 |
|
| 33 |
EOF |
| 34 |
|
| 35 |
if (prompt ("Skip further questions and use defaults (y/n)?", "y") =~ /[yY]/) { |
| 36 |
$ENV{PERL_MM_USE_DEFAULT} = 1; |
| 37 |
} |
| 38 |
|
| 39 |
print <<EOF; |
| 40 |
|
| 41 |
*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** |
| 42 |
|
| 43 |
|
| 44 |
POSIX optionally offers support for a monotonic clock source. EV |
| 45 |
can take advantage of this clock source to detect time jumps more |
| 46 |
reliably. Unfortunately, some systems are bound to be broken, so you can |
| 47 |
disable this here: you can completely disable the detection and use of |
| 48 |
the monotonic clock by answering 'n' here. Support for this clock type |
| 49 |
will otherwise be autodetected at both compile- and runtime. (this setting |
| 50 |
currently affects the use of nanosleep over select as well). |
| 51 |
|
| 52 |
EOF |
| 53 |
|
| 54 |
unless (prompt ("Enable optional support for CLOCK_MONOTONIC (y/n)?", "y") =~ /[yY]/) { |
| 55 |
$DEFINE .= " -DEV_USE_MONOTONIC=0"; |
| 56 |
} |
| 57 |
|
| 58 |
print <<EOF; |
| 59 |
|
| 60 |
*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** |
| 61 |
|
| 62 |
|
| 63 |
POSIX optionally offers support for a (potentially) high-resolution |
| 64 |
realtime clock interface. In a good implementation, using it is faster |
| 65 |
than the normal method of using gettimeofday. Unfortunately, this option |
| 66 |
is also bound to be broken on some systems, and current EV versions do not |
| 67 |
actually call gettimeofday very often, so it defaults to no. |
| 68 |
|
| 69 |
EOF |
| 70 |
|
| 71 |
$DEFINE .= " -DEV_USE_REALTIME=" . (0 + (prompt ("Prefer clock_gettime (CLOCK_REALTIME) over gettimeofday (y/n)?", "n") =~ /[yY]/)); |
| 72 |
|
| 73 |
print <<EOF; |
| 74 |
|
| 75 |
*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** |
| 76 |
|
| 77 |
|
| 78 |
EV can use various backends with various portability issues. The select |
| 79 |
backend is the most portable and makes for a good fallback, but it can be |
| 80 |
limited to a low number of file descriptors and/or might not compile. If |
| 81 |
you have problems with compiling ev_select.c, you might try to play around |
| 82 |
with disabling it here, or forcing it to use the fd_set provided by your |
| 83 |
OS, via the next question. I highly recommend keeping it in. |
| 84 |
|
| 85 |
EOF |
| 86 |
|
| 87 |
if (prompt ("Enable select backend (y/n)?", "y") =~ /[yY]/) { |
| 88 |
$DEFINE .= " -DEV_USE_SELECT=1"; |
| 89 |
|
| 90 |
print <<EOF; |
| 91 |
|
| 92 |
*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** |
| 93 |
|
| 94 |
|
| 95 |
The select backend can operate in two modes. One uses the system-provided |
| 96 |
fd_set and is usually limited to 1024 file descriptors (64 on windows), |
| 97 |
the other requires your header files to define NFDBITS and declare a |
| 98 |
suitable fd_mask type. If you run into problems compiling ev_select.c, you |
| 99 |
can try forcing the use of the system fd_set here. |
| 100 |
|
| 101 |
EOF |
| 102 |
|
| 103 |
if (prompt ("Force use of system fd_set for select backend (y/n)?", "n") =~ /[yY]/) { |
| 104 |
$DEFINE .= " -DEV_SELECT_USE_FD_SET"; |
| 105 |
} |
| 106 |
} else { |
| 107 |
$DEFINE .= " -DEV_USE_SELECT=0"; |
| 108 |
} |
| 109 |
|
| 110 |
print <<EOF; |
| 111 |
|
| 112 |
*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** |
| 113 |
|
| 114 |
|
| 115 |
The second very portable backend is poll(2). It does not exist on windows |
| 116 |
and various versions of Mac OS X (and on the other versions it simply |
| 117 |
doesn't work), but works basically everywhere else. It is recommended to use |
| 118 |
the default here unless you run into compile problems in ev_poll.c. |
| 119 |
|
| 120 |
EOF |
| 121 |
|
| 122 |
$DEFINE .= " -DEV_USE_POLL=" . (0 + (prompt ("Enable poll backend (y/n)?", (have_inc "poll.h") ? "y" : "n") =~ /[yY]/)); |
| 123 |
|
| 124 |
print <<EOF; |
| 125 |
|
| 126 |
*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** |
| 127 |
|
| 128 |
|
| 129 |
Select and poll make it hard to write efficient servers, especially if the |
| 130 |
number of active connections is much lower than the watched ones. GNU/Linux |
| 131 |
systems have a more scalable method called "epoll", which EV can use. For |
| 132 |
this to work, both your kernel and glibc have to support epoll, but if you |
| 133 |
can compile it, the detection will be done at runtime, and EV will safely |
| 134 |
fall back to using select when epoll isn't available. If unsure, accept |
| 135 |
the default. |
| 136 |
|
| 137 |
EOF |
| 138 |
|
| 139 |
my $can_epoll = have_inc "sys/epoll.h"; |
| 140 |
$can_epoll = $ENV{EV_EPOLL} if exists $ENV{EV_EPOLL}; |
| 141 |
$DEFINE .= " -DEV_USE_EPOLL=" . (0 + (prompt ("Enable epoll backend (y/n)?", $can_epoll ? "y" : "n") =~ /[yY]/)); |
| 142 |
|
| 143 |
print <<EOF; |
| 144 |
|
| 145 |
*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** |
| 146 |
|
| 147 |
|
| 148 |
Linux 4.18 introduced another event polling interface, this time using |
| 149 |
the Linux AIO API. While this API is far superior to epoll and almost |
| 150 |
rivals kqueue, it also suffers from the same issues as kqueue typically |
| 151 |
does: only a subset of file types are supported (as of 4.19, I have seen |
| 152 |
eventfd, pipes, sockets files and some devices, but no ttys). It also |
| 153 |
is subject arbitrary system-wide limits imposed on it. Therefore, this |
| 154 |
backend is not used by default, even when it is compiled in, and you have |
| 155 |
to request it explicitly, e.g. with LIBEV_FLAGS=64. If unsure, accept the |
| 156 |
default. |
| 157 |
|
| 158 |
EOF |
| 159 |
|
| 160 |
my $can_linuxaio = have_inc "linux/aio_abi.h"; |
| 161 |
$can_linuxaio = $ENV{EV_LINUXAIO} if exists $ENV{EV_LINUXAIO}; |
| 162 |
$can_linuxaio = 0 + (prompt ("Enable linux aio backend (y/n)?", $can_linuxaio ? "y" : "n") =~ /[yY]/); |
| 163 |
$DEFINE .= " -DEV_USE_LINUXAIO=$can_linuxaio"; |
| 164 |
|
| 165 |
if ($can_linuxaio) { |
| 166 |
print <<EOF; |
| 167 |
|
| 168 |
*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** |
| 169 |
|
| 170 |
|
| 171 |
The previously mentioned Linux AIO backend is experimental and will not |
| 172 |
be used unless requested explicitly. You can, howeer, choose to make ti a |
| 173 |
recommended basckend, which means it will be chosen if available even when |
| 174 |
not explicitly asked for, in preference to epoll on GNU/Linux. This option |
| 175 |
is likely temporary. When unsure, accept the default. |
| 176 |
|
| 177 |
EOF |
| 178 |
|
| 179 |
my $recommend_linuxaio = 0; |
| 180 |
$recommend_linuxaio = $ENV{EV_RECOMMEND_LINUXAIO} if exists $ENV{EV_RECOMMEND_LINUXAIO}; |
| 181 |
$recommend_linuxaio = 0 + (prompt ("Treat linux aio as a recommended backend (y/n)?", $recommend_linuxaio ? "y" : "n") =~ /[yY]/); |
| 182 |
$DEFINE .= " -DEV_RECOMMEND_LINUXAIO=$recommend_linuxaio"; |
| 183 |
} |
| 184 |
|
| 185 |
print <<EOF; |
| 186 |
|
| 187 |
*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** |
| 188 |
|
| 189 |
|
| 190 |
Similarly to the epoll backend above, EV can take advantage of kqueue on |
| 191 |
many BSD systems. Support for kqueue will be detected at runtime, with a |
| 192 |
safe fallback to other methods when it cannot be used. |
| 193 |
|
| 194 |
Note that kqueue is broken on most operating systems, so by default it |
| 195 |
won't be used on many platforms, but you can still create your own event |
| 196 |
loop with kqueue backend if you ask specifically for it. |
| 197 |
|
| 198 |
Here is what we know: |
| 199 |
|
| 200 |
NetBSD: partially working in at least 3.1 and later. Yeah! :) |
| 201 |
FreeBSD: broken on at least 6.2-STABLE, spotty in later versions, |
| 202 |
sockets *likely* work, ptys definitely don't. |
| 203 |
OpenBSD: reports indicate that it likely doesn't work |
| 204 |
(similar problems as on FreeBSD). |
| 205 |
OS X: completely, utterly broken on at least <= 10.6. |
| 206 |
|
| 207 |
EOF |
| 208 |
|
| 209 |
# minix has all the header files, but no implementation. won-der-ful. |
| 210 |
my $can_kqueue = have_inc "sys/event.h" && $^O ne "minix"; |
| 211 |
$can_kqueue = $ENV{EV_KQUEUE} if exists $ENV{EV_KQUEUE}; |
| 212 |
$DEFINE .= " -DEV_USE_KQUEUE=" . (0 + (prompt ("Enable kqueue backend (y/n)?", $can_kqueue ? "y" : "n") =~ /[yY]/)); |
| 213 |
|
| 214 |
print <<EOF; |
| 215 |
|
| 216 |
*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** |
| 217 |
|
| 218 |
|
| 219 |
Similarly to the kqueue backend above, EV can take advantage of the |
| 220 |
solaris 10 event port interface. Support for event ports will be detected |
| 221 |
at runtime, with a safe fallback to other methods when it cannot be used. |
| 222 |
|
| 223 |
EOF |
| 224 |
|
| 225 |
$DEFINE .= " -DEV_USE_PORT=" . (0 + (prompt ("Enable event port backend (y/n)?", (have_inc "sys/port.h") ? "y" : "n") =~ /[yY]/)); |
| 226 |
|
| 227 |
print <<EOF; |
| 228 |
|
| 229 |
*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** |
| 230 |
|
| 231 |
|
| 232 |
EV needs the functions pthread_atfork and clock_gettime. On most systems |
| 233 |
you need some special libraries for this (such as -lrt and -lpthread). You |
| 234 |
can specify additional libraries to provide these calls (and any other |
| 235 |
required by EV) now, or accept the default. |
| 236 |
|
| 237 |
On GNU/Linux systems, EV uses the LSB 3.1 __register_atfork function |
| 238 |
to avoid the dependency on libpthread, and directly uses the clock_gettime |
| 239 |
syscall to avoid a dependency on librt. |
| 240 |
|
| 241 |
EOF |
| 242 |
|
| 243 |
my $solaris_libs = $^O =~ /solaris/i ? "-lsocket -lnsl" : ""; |
| 244 |
my $librt = $^O =~ /linux/i ? "" : "-lpthread -lrt"; |
| 245 |
my $LIBS = exists $ENV{EV_LIBS} ? $ENV{EV_LIBS} : "$librt $solaris_libs"; |
| 246 |
$LIBS = prompt "Extra libraries for pthread_atfork and clock_gettime?", $LIBS; |
| 247 |
|
| 248 |
|
| 249 |
print <<EOF; |
| 250 |
|
| 251 |
*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** |
| 252 |
|
| 253 |
|
| 254 |
A backend of a different kind is the Linux inotify(7) interface, which can |
| 255 |
be used to speed up (and reduce resource consumption) of stat watchers. If |
| 256 |
you have the include file and libc support for it, it is usually a good |
| 257 |
idea to enable it, as kernel availability is detected at runtime. |
| 258 |
|
| 259 |
EOF |
| 260 |
|
| 261 |
my $can_inotify = have_inc "sys/inotify.h"; |
| 262 |
$can_inotify = $ENV{EV_INOTIFY} if exists $ENV{EV_INOTIFY}; |
| 263 |
$DEFINE .= " -DEV_USE_INOTIFY=" . (0 + (prompt ("Enable inotify support (y/n)?", $can_inotify ? "y" : "n") =~ /[yY]/)); |
| 264 |
|
| 265 |
print <<EOF; |
| 266 |
|
| 267 |
*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** |
| 268 |
|
| 269 |
|
| 270 |
Another useful bit of functionality is the Linux eventfd, which is useful |
| 271 |
for faster signal handling (don't care) and intra-thread communications |
| 272 |
(more relevant). Kernel support for this will be probed at runtime, but |
| 273 |
your libc must contain the necessary wrapper. Glibc 2.7 and later should |
| 274 |
have this wrapper. |
| 275 |
|
| 276 |
EOF |
| 277 |
|
| 278 |
my $can_eventfd = have_inc "sys/eventfd.h"; |
| 279 |
$can_eventfd = $ENV{EV_EVENTFD} if exists $ENV{EV_EVENTFD}; |
| 280 |
$DEFINE .= " -DEV_USE_EVENTFD=" . (0 + (prompt ("Enable linux eventfd support (y/n)?", $can_eventfd ? "y" : "n") =~ /[yY]/)); |
| 281 |
|
| 282 |
print <<EOF; |
| 283 |
|
| 284 |
*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** |
| 285 |
|
| 286 |
|
| 287 |
Another sometimes useful bit of functionality is the Linux signalfd, which |
| 288 |
is useful for faster signal handling (don't care). Kernel support for |
| 289 |
this will be probed at runtime, but your libc must contain the necessary |
| 290 |
wrapper. Glibc 2.7 and later should have this wrapper. |
| 291 |
|
| 292 |
EOF |
| 293 |
|
| 294 |
my $can_signalfd = have_inc "sys/signalfd.h"; |
| 295 |
$can_signalfd = $ENV{EV_SIGNALFD} if exists $ENV{EV_SIGNALFD}; |
| 296 |
$DEFINE .= " -DEV_USE_SIGNALFD=" . (0 + (prompt ("Enable linux signalfd support (y/n)?", $can_signalfd ? "y" : "n") =~ /[yY]/)); |
| 297 |
|
| 298 |
print <<EOF; |
| 299 |
|
| 300 |
*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** |
| 301 |
|
| 302 |
|
| 303 |
Libev contains numerous internal assert() invocations to check for |
| 304 |
consistency and user errors. These are normally enabled, but most |
| 305 |
perl builds disable this error reporting mechanism by default. You |
| 306 |
can re-enable these asserts here. Enabling them might help you catch |
| 307 |
programming bugs earlier, but might cause a small slowdown. Also, failures |
| 308 |
will be reported by aboritng your program, instead of throwing a perl |
| 309 |
exception. |
| 310 |
|
| 311 |
If unsure, enable this if you only use this perl installation for |
| 312 |
development, and leave it off for use in production environments. |
| 313 |
|
| 314 |
EOF |
| 315 |
|
| 316 |
my $enable_assertions = 0; |
| 317 |
$enable_assertions = 0 + (prompt ("Make sure assertions are enabled? (y/n)?", $enable_assertions ? "y" : "n") =~ /[yY]/); |
| 318 |
$DEFINE .= " -DEV_ENABLE_ASERTIONS=1" if $enable_assertions; |
| 319 |
|
| 320 |
print <<EOF; |
| 321 |
|
| 322 |
*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** |
| 323 |
|
| 324 |
|
| 325 |
Very rarely, people want to tweak EV even more, e.g. to exclude |
| 326 |
or include certain watcher types or backends. This can be done by adding |
| 327 |
extra -D options here, or via the EV_EXTRA_DEFS environment variable. |
| 328 |
|
| 329 |
For example, if you run into compile problems because of missing memory |
| 330 |
fences (or you just want extra performance), you can tell EV to not support |
| 331 |
smp and threads via -DEV_NO_THREADS. |
| 332 |
|
| 333 |
Normal persons just press enter. |
| 334 |
|
| 335 |
EOF |
| 336 |
|
| 337 |
$DEFINE .= " " . prompt "Any extra -D options?", "$ENV{EV_EXTRA_DEFS}"; |
| 338 |
|
| 339 |
print <<EOF; |
| 340 |
|
| 341 |
*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** |
| 342 |
|
| 343 |
|
| 344 |
EOF |
| 345 |
|
| 346 |
my @anyevent = eval { require AnyEvent; $AnyEvent::VERSION < 5.29 } ? (AnyEvent => 5.29) : (); |
| 347 |
|
| 348 |
WriteMakefile( |
| 349 |
dist => { |
| 350 |
PREOP => 'pod2text EV.pm | tee README >$(DISTVNAME)/README; chmod -R u=rwX,go=rX . ;', |
| 351 |
COMPRESS => 'gzip -9v', |
| 352 |
SUFFIX => '.gz', |
| 353 |
}, |
| 354 |
depend => { |
| 355 |
"EV.c" => "EV/EVAPI.h " |
| 356 |
. "libev/ev.c libev/ev.h libev/ev_epoll.c libev/ev_select.c libev/ev_kqueue.c libev/ev_poll.c libev/ev_linuxaio.c " |
| 357 |
. "libev/ev_vars.h libev/ev_wrap.h", |
| 358 |
}, |
| 359 |
INC => "-Ilibev", |
| 360 |
DEFINE => "$DEFINE", |
| 361 |
NAME => "EV", |
| 362 |
LIBS => [$LIBS], |
| 363 |
PREREQ_PM => { |
| 364 |
@anyevent, |
| 365 |
"common::sense" => 0, |
| 366 |
}, |
| 367 |
CONFIGURE_REQUIRES => { "ExtUtils::MakeMaker" => 6.52, "Canary::Stability" => 0 }, |
| 368 |
VERSION_FROM => "EV.pm", |
| 369 |
PM => { |
| 370 |
'EV.pm' => '$(INST_LIB)/EV.pm', |
| 371 |
'EV/EVAPI.h' => '$(INST_LIB)/EV/EVAPI.h', |
| 372 |
'EV/MakeMaker.pm' => '$(INST_LIB)/EV/MakeMaker.pm', |
| 373 |
'libev/ev.h' => '$(INST_LIB)/EV/ev.h', |
| 374 |
'libev/ev.pod' => '$(INST_LIB)/EV/libev.pod', |
| 375 |
}, |
| 376 |
MAN3PODS => { |
| 377 |
'EV.pm' => '$(INST_MAN3DIR)/EV.$(MAN3EXT)', |
| 378 |
'EV/MakeMaker.pm' => '$(INST_MAN3DIR)/EV::MakeMaker.$(MAN3EXT)', |
| 379 |
'libev/ev.pod' => '$(INST_MAN3DIR)/EV::libev.$(MAN3EXT)', |
| 380 |
}, |
| 381 |
); |
| 382 |
|
