EV/Makefile.PL

use strict qw(vars subs);
use Canary::Stability EV => 1, 5.008002;
use Config;
use ExtUtils::MakeMaker;

sub have_inc($) {
   scalar grep -r "$_/$_[0]", $Config{usrinc}, split / /, $Config{incpth}
}

my $DEFINE;

unless (-e "libev/ev_epoll.c") {
   print <<EOF;

***
*** ERROR: libev is missing or damaged. If you used a CVS check-out of EV,
*** you also have to check-out the "libev" module from the same CVS
*** repository into the EV dir (i.e. EV/libev from outside).
***

EOF
   exit 1;
}

print <<EOF;

*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***


Welcome to EV configuration. If you are in a hurry, just press return here
and hope for the best. The defaults should usually do.

EOF

if (prompt ("Skip further questions and use defaults (y/n)?", "y") =~ /[yY]/) {
   $ENV{PERL_MM_USE_DEFAULT} = 1;
}

print <<EOF;

*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***


POSIX optionally offers support for a monotonic clock source. EV
can take advantage of this clock source to detect time jumps more
reliably. Unfortunately, some systems are bound to be broken, so you can
disable this here: you can completely disable the detection and use of
the monotonic clock by answering 'n' here. Support for this clock type
will otherwise be autodetected at both compile- and runtime. (this setting
currently affects the use of nanosleep over select as well).

EOF

unless (prompt ("Enable optional support for CLOCK_MONOTONIC (y/n)?", "y") =~ /[yY]/) {
   $DEFINE .= " -DEV_USE_MONOTONIC=0";
}

print <<EOF;

*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***


POSIX optionally offers support for a (potentially) high-resolution
realtime clock interface. In a good implementation, using it is faster
than the normal method of using gettimeofday. Unfortunately, this option
is also bound to be broken on some systems, and current EV versions do not
actually call gettimeofday very often, so it defaults to no.

EOF

$DEFINE .= " -DEV_USE_REALTIME=" . (0 + (prompt ("Prefer clock_gettime (CLOCK_REALTIME) over gettimeofday (y/n)?", "n") =~ /[yY]/));

print <<EOF;

*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***


EV can use various backends with various portability issues. The select
backend is the most portable and makes for a good fallback, but it can be
limited to a low number of file descriptors and/or might not compile. If
you have problems with compiling ev_select.c, you might try to play around
with disabling it here, or forcing it to use the fd_set provided by your
OS, via the next question. I highly recommend keeping it in.

EOF

if (prompt ("Enable select backend (y/n)?", "y") =~ /[yY]/) {
   $DEFINE .= " -DEV_USE_SELECT=1";

   print <<EOF;

*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***


The select backend can operate in two modes. One uses the system-provided
fd_set and is usually limited to 1024 file descriptors (64 on windows),
the other requires your header files to define NFDBITS and declare a
suitable fd_mask type. If you run into problems compiling ev_select.c, you
can try forcing the use of the system fd_set here.

EOF

   if (prompt ("Force use of system fd_set for select backend (y/n)?", "n") =~ /[yY]/) {
      $DEFINE .= " -DEV_SELECT_USE_FD_SET";
   }
} else {
   $DEFINE .= " -DEV_USE_SELECT=0";
}

print <<EOF;

*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***


The second very portable backend is poll(2). It does not exist on windows
and various versions of Mac OS X (and on the other versions it simply
doesn't work), but works basically everywhere else. It is recommended to use
the default here unless you run into compile problems in ev_poll.c.

EOF

$DEFINE .= " -DEV_USE_POLL=" . (0 + (prompt ("Enable poll backend (y/n)?", (have_inc "poll.h") ? "y" : "n") =~ /[yY]/));

print <<EOF;

*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***


Select and poll make it hard to write efficient servers, especially if the
number of active connections is much lower than the watched ones. GNU/Linux
systems have a more scalable method called "epoll", which EV can use. For
this to work, both your kernel and glibc have to support epoll, but if you
can compile it, the detection will be done at runtime, and EV will safely
fall back to using select when epoll isn't available. If unsure, accept
the default.

EOF

my $can_epoll = have_inc "sys/epoll.h";
$can_epoll = $ENV{EV_EPOLL} if exists $ENV{EV_EPOLL};
$DEFINE .= " -DEV_USE_EPOLL=" . (0 + (prompt ("Enable epoll backend (y/n)?", $can_epoll ? "y" : "n") =~ /[yY]/));

print <<EOF;

*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***


Linux 4.18 introduced another event polling interface, this time using
the Linux AIO API. While this API is far superior to epoll and almost
rivals kqueue, it also suffers from the same issues as kqueue typically
does: only a subset of file types are supported (as of 4.19, I have seen
eventfd, pipes, sockets files and some devices, but no ttys). It also
is subject arbitrary system-wide limits imposed on it. Therefore, this
backend is not used by default, even when it is compiled in, and you have
to request it explicitly, e.g. with LIBEV_FLAGS=64. If unsure, accept the
default.

EOF

my $can_linuxaio = have_inc "linux/aio_abi.h";
$can_linuxaio = $ENV{EV_LINUXAIO} if exists $ENV{EV_LINUXAIO};
$can_linuxaio = 0 + (prompt ("Enable linux aio backend (y/n)?", $can_linuxaio ? "y" : "n") =~ /[yY]/);
$DEFINE .= " -DEV_USE_LINUXAIO=$can_linuxaio";

if ($can_linuxaio) {
print <<EOF;

*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***


The previously mentioned Linux AIO backend is experimental and will not
be used unless requested explicitly. You can, howeer, choose to make ti a
recommended basckend, which means it will be chosen if available even when
not explicitly asked for, in preference to epoll on GNU/Linux. This option
is likely temporary. When unsure, accept the default.

EOF

my $recommend_linuxaio = 0;
$recommend_linuxaio = $ENV{EV_RECOMMEND_LINUXAIO} if exists $ENV{EV_RECOMMEND_LINUXAIO};
$recommend_linuxaio = 0 + (prompt ("Treat linux aio as a recommended backend (y/n)?", $recommend_linuxaio ? "y" : "n") =~ /[yY]/);
$DEFINE .= " -DEV_RECOMMEND_LINUXAIO=$recommend_linuxaio";
}

print <<EOF;

*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***


Similarly to the epoll backend above, EV can take advantage of kqueue on
many BSD systems. Support for kqueue will be detected at runtime, with a
safe fallback to other methods when it cannot be used.

Note that kqueue is broken on most operating systems, so by default it
won't be used on many platforms, but you can still create your own event
loop with kqueue backend if you ask specifically for it.

Here is what we know:

NetBSD:  partially working in at least 3.1 and later. Yeah! :)
FreeBSD: broken on at least 6.2-STABLE, spotty in later versions,
         sockets *likely* work, ptys definitely don't.
OpenBSD: reports indicate that it likely doesn't work
         (similar problems as on FreeBSD).
OS X:    completely, utterly broken on at least <= 10.6.

EOF

my $can_kqueue = have_inc "sys/event.h";
$can_kqueue = $ENV{EV_KQUEUE} if exists $ENV{EV_KQUEUE};
$DEFINE .= " -DEV_USE_KQUEUE=" . (0 + (prompt ("Enable kqueue backend (y/n)?", $can_kqueue ? "y" : "n") =~ /[yY]/));

print <<EOF;

*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***


Similarly to the kqueue backend above, EV can take advantage of the
solaris 10 event port interface. Support for event ports will be detected
at runtime, with a safe fallback to other methods when it cannot be used.

EOF

$DEFINE .= " -DEV_USE_PORT=" . (0 + (prompt ("Enable event port backend (y/n)?", (have_inc "sys/port.h") ? "y" : "n") =~ /[yY]/));

print <<EOF;

*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***


EV needs the functions pthread_atfork and clock_gettime. On most systems
you need some special libraries for this (such as -lrt and -lpthread). You
can specify additional libraries to provide these calls (and any other
required by EV) now, or accept the default.

On GNU/Linux systems, EV uses the LSB 3.1 __register_atfork function
to avoid the dependency on libpthread, and directly uses the clock_gettime
syscall to avoid a dependency on librt.

EOF

my $solaris_libs = $^O =~ /solaris/i ? "-lsocket -lnsl" : "";
my $librt = $^O =~ /linux/i ? "" : "-lpthread -lrt";
my $LIBS = exists $ENV{EV_LIBS} ? $ENV{EV_LIBS} : "$librt $solaris_libs";
$LIBS = prompt "Extra libraries for pthread_atfork and clock_gettime?", $LIBS;


print <<EOF;

*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***


A backend of a different kind is the Linux inotify(7) interface, which can
be used to speed up (and reduce resource consumption) of stat watchers. If
you have the include file and libc support for it, it is usually a good
idea to enable it, as kernel availability is detected at runtime.

EOF

my $can_inotify = have_inc "sys/inotify.h";
$can_inotify = $ENV{EV_INOTIFY} if exists $ENV{EV_INOTIFY};
$DEFINE .= " -DEV_USE_INOTIFY=" . (0 + (prompt ("Enable inotify support (y/n)?", $can_inotify ? "y" : "n") =~ /[yY]/));

print <<EOF;

*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***


Another useful bit of functionality is the Linux eventfd, which is useful
for faster signal handling (don't care) and intra-thread communications
(more relevant). Kernel support for this will be probed at runtime, but
your libc must contain the necessary wrapper. Glibc 2.7 and later should
have this wrapper.

EOF

my $can_eventfd = have_inc "sys/eventfd.h";
$can_eventfd = $ENV{EV_EVENTFD} if exists $ENV{EV_EVENTFD};
$DEFINE .= " -DEV_USE_EVENTFD=" . (0 + (prompt ("Enable linux eventfd support (y/n)?", $can_eventfd ? "y" : "n") =~ /[yY]/));

print <<EOF;

*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***


Another sometimes useful bit of functionality is the Linux signalfd, which
is useful for faster signal handling (don't care). Kernel support for
this will be probed at runtime, but your libc must contain the necessary
wrapper. Glibc 2.7 and later should have this wrapper.

EOF

my $can_signalfd = have_inc "sys/signalfd.h";
$can_signalfd = $ENV{EV_SIGNALFD} if exists $ENV{EV_SIGNALFD};
$DEFINE .= " -DEV_USE_SIGNALFD=" . (0 + (prompt ("Enable linux signalfd support (y/n)?", $can_signalfd ? "y" : "n") =~ /[yY]/));

print <<EOF;

*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***


Very rarely, people want to tweak EV even more, e.g. to exclude
or include certain watcher types or backends. This can be done by adding
extra -D options here, or via the EV_EXTRA_DEFS environment variable.

For example, if you run into compile problems because of missing memory
fences (or you just want extra performance), you can tell EV to not support
smp and threads via -DEV_NO_THREADS.

Normal persons just press enter.

EOF

$DEFINE .= " " . prompt "Any extra -D options?", "$ENV{EV_EXTRA_DEFS}";

print <<EOF;

*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***


EOF

my @anyevent = eval { require AnyEvent; $AnyEvent::VERSION < 5.29 } ? (AnyEvent => 5.29) : ();

WriteMakefile(
    dist        => {
                    PREOP       => 'pod2text EV.pm | tee README >$(DISTVNAME)/README; chmod -R u=rwX,go=rX . ;',
                    COMPRESS    => 'gzip -9v',
                    SUFFIX      => '.gz',
                   },
    depend => {
       "EV.c" => "EV/EVAPI.h "
               . "libev/ev.c libev/ev.h libev/ev_epoll.c libev/ev_select.c libev/ev_kqueue.c libev/ev_poll.c "
               . "libev/ev_vars.h libev/ev_wrap.h",
    },
    INC       => "-Ilibev",
    DEFINE    => "$DEFINE",
    NAME => "EV",
    LIBS => [$LIBS],
    PREREQ_PM => {
       @anyevent,
       "common::sense" => 0,
    },
    CONFIGURE_REQUIRES => { "ExtUtils::MakeMaker" => 6.52, "Canary::Stability" => 0 },
    VERSION_FROM => "EV.pm",
    PM           => {
                    'EV.pm'             => '$(INST_LIB)/EV.pm',
                    'EV/EVAPI.h'        => '$(INST_LIB)/EV/EVAPI.h',
                    'EV/MakeMaker.pm'   => '$(INST_LIB)/EV/MakeMaker.pm',
                    'libev/ev.h'        => '$(INST_LIB)/EV/ev.h',
                    'libev/ev.pod'      => '$(INST_LIB)/EV/libev.pod',
                 },
    MAN3PODS => {
                    'EV.pm'           => '$(INST_MAN3DIR)/EV.$(MAN3EXT)',
                    'EV/MakeMaker.pm' => '$(INST_MAN3DIR)/EV::MakeMaker.$(MAN3EXT)',
                    'libev/ev.pod'    => '$(INST_MAN3DIR)/EV::libev.$(MAN3EXT)',
                },
);


Revision:	1.60
Committed:	Mon Jun 24 21:38:08 2019 UTC (4 years, 10 months ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	EV-rel-4_26
Changes since 1.59:	+22 -1 lines
Log Message:	* empty log message *
#	Content
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_epoll.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	my $can_kqueue = have_inc "sys/event.h";
210	$can_kqueue = $ENV{EV_KQUEUE} if exists $ENV{EV_KQUEUE};
211	$DEFINE .= " -DEV_USE_KQUEUE=" . (0 + (prompt ("Enable kqueue backend (y/n)?", $can_kqueue ? "y" : "n") =~ /[yY]/));
212
213	print <<EOF;
214
215	* * * * * * * * * * * * * * * * * *
216
217
218	Similarly to the kqueue backend above, EV can take advantage of the
219	solaris 10 event port interface. Support for event ports will be detected
220	at runtime, with a safe fallback to other methods when it cannot be used.
221
222	EOF
223
224	$DEFINE .= " -DEV_USE_PORT=" . (0 + (prompt ("Enable event port backend (y/n)?", (have_inc "sys/port.h") ? "y" : "n") =~ /[yY]/));
225
226	print <<EOF;
227
228	* * * * * * * * * * * * * * * * * *
229
230
231	EV needs the functions pthread_atfork and clock_gettime. On most systems
232	you need some special libraries for this (such as -lrt and -lpthread). You
233	can specify additional libraries to provide these calls (and any other
234	required by EV) now, or accept the default.
235
236	On GNU/Linux systems, EV uses the LSB 3.1 __register_atfork function
237	to avoid the dependency on libpthread, and directly uses the clock_gettime
238	syscall to avoid a dependency on librt.
239
240	EOF
241
242	my $solaris_libs = $^O =~ /solaris/i ? "-lsocket -lnsl" : "";
243	my $librt = $^O =~ /linux/i ? "" : "-lpthread -lrt";
244	my $LIBS = exists $ENV{EV_LIBS} ? $ENV{EV_LIBS} : "$librt $solaris_libs";
245	$LIBS = prompt "Extra libraries for pthread_atfork and clock_gettime?", $LIBS;
246
247
248	print <<EOF;
249
250	* * * * * * * * * * * * * * * * * *
251
252
253	A backend of a different kind is the Linux inotify(7) interface, which can
254	be used to speed up (and reduce resource consumption) of stat watchers. If
255	you have the include file and libc support for it, it is usually a good
256	idea to enable it, as kernel availability is detected at runtime.
257
258	EOF
259
260	my $can_inotify = have_inc "sys/inotify.h";
261	$can_inotify = $ENV{EV_INOTIFY} if exists $ENV{EV_INOTIFY};
262	$DEFINE .= " -DEV_USE_INOTIFY=" . (0 + (prompt ("Enable inotify support (y/n)?", $can_inotify ? "y" : "n") =~ /[yY]/));
263
264	print <<EOF;
265
266	* * * * * * * * * * * * * * * * * *
267
268
269	Another useful bit of functionality is the Linux eventfd, which is useful
270	for faster signal handling (don't care) and intra-thread communications
271	(more relevant). Kernel support for this will be probed at runtime, but
272	your libc must contain the necessary wrapper. Glibc 2.7 and later should
273	have this wrapper.
274
275	EOF
276
277	my $can_eventfd = have_inc "sys/eventfd.h";
278	$can_eventfd = $ENV{EV_EVENTFD} if exists $ENV{EV_EVENTFD};
279	$DEFINE .= " -DEV_USE_EVENTFD=" . (0 + (prompt ("Enable linux eventfd support (y/n)?", $can_eventfd ? "y" : "n") =~ /[yY]/));
280
281	print <<EOF;
282
283	* * * * * * * * * * * * * * * * * *
284
285
286	Another sometimes useful bit of functionality is the Linux signalfd, which
287	is useful for faster signal handling (don't care). Kernel support for
288	this will be probed at runtime, but your libc must contain the necessary
289	wrapper. Glibc 2.7 and later should have this wrapper.
290
291	EOF
292
293	my $can_signalfd = have_inc "sys/signalfd.h";
294	$can_signalfd = $ENV{EV_SIGNALFD} if exists $ENV{EV_SIGNALFD};
295	$DEFINE .= " -DEV_USE_SIGNALFD=" . (0 + (prompt ("Enable linux signalfd support (y/n)?", $can_signalfd ? "y" : "n") =~ /[yY]/));
296
297	print <<EOF;
298
299	* * * * * * * * * * * * * * * * * *
300
301
302	Very rarely, people want to tweak EV even more, e.g. to exclude
303	or include certain watcher types or backends. This can be done by adding
304	extra -D options here, or via the EV_EXTRA_DEFS environment variable.
305
306	For example, if you run into compile problems because of missing memory
307	fences (or you just want extra performance), you can tell EV to not support
308	smp and threads via -DEV_NO_THREADS.
309
310	Normal persons just press enter.
311
312	EOF
313
314	$DEFINE .= " " . prompt "Any extra -D options?", "$ENV{EV_EXTRA_DEFS}";
315
316	print <<EOF;
317
318	* * * * * * * * * * * * * * * * * *
319
320
321	EOF
322
323	my @anyevent = eval { require AnyEvent; $AnyEvent::VERSION < 5.29 } ? (AnyEvent => 5.29) : ();
324
325	WriteMakefile(
326	dist => {
327	PREOP => 'pod2text EV.pm \| tee README >$(DISTVNAME)/README; chmod -R u=rwX,go=rX . ;',
328	COMPRESS => 'gzip -9v',
329	SUFFIX => '.gz',
330	},
331	depend => {
332	"EV.c" => "EV/EVAPI.h "
333	. "libev/ev.c libev/ev.h libev/ev_epoll.c libev/ev_select.c libev/ev_kqueue.c libev/ev_poll.c "
334	. "libev/ev_vars.h libev/ev_wrap.h",
335	},
336	INC => "-Ilibev",
337	DEFINE => "$DEFINE",
338	NAME => "EV",
339	LIBS => [$LIBS],
340	PREREQ_PM => {
341	@anyevent,
342	"common::sense" => 0,
343	},
344	CONFIGURE_REQUIRES => { "ExtUtils::MakeMaker" => 6.52, "Canary::Stability" => 0 },
345	VERSION_FROM => "EV.pm",
346	PM => {
347	'EV.pm' => '$(INST_LIB)/EV.pm',
348	'EV/EVAPI.h' => '$(INST_LIB)/EV/EVAPI.h',
349	'EV/MakeMaker.pm' => '$(INST_LIB)/EV/MakeMaker.pm',
350	'libev/ev.h' => '$(INST_LIB)/EV/ev.h',
351	'libev/ev.pod' => '$(INST_LIB)/EV/libev.pod',
352	},
353	MAN3PODS => {
354	'EV.pm' => '$(INST_MAN3DIR)/EV.$(MAN3EXT)',
355	'EV/MakeMaker.pm' => '$(INST_MAN3DIR)/EV::MakeMaker.$(MAN3EXT)',
356	'libev/ev.pod' => '$(INST_MAN3DIR)/EV::libev.$(MAN3EXT)',
357	},
358	);
359
360