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_linuxaio.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

# minix has all the header files, but no implementation. won-der-ful.
my $can_kqueue = have_inc "sys/event.h" && $^O ne "minix";
$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;

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


Libev contains numerous internal assert() invocations to check for
consistency and user errors. These are normally enabled, but most
perl builds disable this error reporting mechanism by default. You
can re-enable these asserts here. Enabling them might help you catch
programming bugs earlier, but might cause a small slowdown. Also, failures
will be reported by aboritng your program, instead of throwing a perl
exception.

If unsure, enable this if you only use this perl installation for
development, and leave it off for use in production environments.

EOF

my $enable_assertions = 0;
$enable_assertions = 0 + (prompt ("Make sure assertions are enabled? (y/n)?", $enable_assertions ? "y" : "n") =~ /[yY]/);
$DEFINE .= " -DEV_ENABLE_ASERTIONS=1" if $enable_assertions;

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 >$(DISTVNAME)/README; chmod -R u=rwX,go=rX . ;',
                    COMPRESS    => 'gzip -9v',
                    SUFFIX      => '.gz',
                   },
    depend => {
       "EV.c" => "EV/EVAPI.h "
               . "libev/ev.c libev/ev.h libev/ev_epoll.c libev/ev_select.c libev/ev_kqueue.c libev/ev_poll.c libev/ev_linuxaio.c "
               . "libev/ev_vars.h libev/ev_wrap.h",
    },
    INC       => "-Ilibev",
    DEFINE    => "$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:	1.63
Committed:	Fri Jul 12 06:18:37 2019 UTC (4 years, 10 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.62:	+2 -1 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.37	use strict qw(vars subs);
2	root	1.57	use Canary::Stability EV => 1, 5.008002;
3	root	1.7	use Config;
4	root	1.1	use ExtUtils::MakeMaker;
5
6	root	1.55	sub have_inc($) {
7			scalar grep -r "$_/$_[0]", $Config{usrinc}, split / /, $Config{incpth}
8			}
9
10	root	1.56	my $DEFINE;
11
12	root	1.61	unless (-e "libev/ev_linuxaio.c") {
13	root	1.10	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	root	1.11	print <<EOF;
26
27	root	1.22	* * * * * * * * * * * * * * * * * *
28	root	1.11
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	root	1.22	* * * * * * * * * * * * * * * * * *
42	root	1.11
43
44	root	1.14	POSIX optionally offers support for a monotonic clock source. EV
45	root	1.45	can take advantage of this clock source to detect time jumps more
46	root	1.14	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	root	1.29	will otherwise be autodetected at both compile- and runtime. (this setting
50			currently affects the use of nanosleep over select as well).
51	root	1.11
52			EOF
53
54	root	1.56	unless (prompt ("Enable optional support for CLOCK_MONOTONIC (y/n)?", "y") =~ /[yY]/) {
55			$DEFINE .= " -DEV_USE_MONOTONIC=0";
56			}
57	root	1.11
58			print <<EOF;
59
60	root	1.22	* * * * * * * * * * * * * * * * * *
61	root	1.11
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	root	1.39	is also bound to be broken on some systems, and current EV versions do not
67	root	1.45	actually call gettimeofday very often, so it defaults to no.
68	root	1.11
69			EOF
70
71	root	1.39	$DEFINE .= " -DEV_USE_REALTIME=" . (0 + (prompt ("Prefer clock_gettime (CLOCK_REALTIME) over gettimeofday (y/n)?", "n") =~ /[yY]/));
72	root	1.11
73			print <<EOF;
74
75	root	1.22	* * * * * * * * * * * * * * * * * *
76	root	1.11
77
78	root	1.46	EV can use various backends with various portability issues. The select
79	root	1.19	backend is the most portable and makes for a good fallback, but it can be
80	root	1.22	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	root	1.19	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	root	1.22	$DEFINE .= " -DEV_USE_SELECT=1";
89	root	1.19
90			print <<EOF;
91
92	root	1.22	* * * * * * * * * * * * * * * * * *
93	root	1.19
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	root	1.55	}
106	root	1.22	} else {
107			$DEFINE .= " -DEV_USE_SELECT=0";
108	root	1.55	}
109	root	1.19
110			print <<EOF;
111
112	root	1.22	* * * * * * * * * * * * * * * * * *
113	root	1.19
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	root	1.55	$DEFINE .= " -DEV_USE_POLL=" . (0 + (prompt ("Enable poll backend (y/n)?", (have_inc "poll.h") ? "y" : "n") =~ /[yY]/));
123	root	1.19
124			print <<EOF;
125
126	root	1.22	* * * * * * * * * * * * * * * * * *
127	root	1.19
128
129	root	1.24	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	root	1.11
137			EOF
138
139	root	1.55	my $can_epoll = have_inc "sys/epoll.h";
140	root	1.37	$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	root	1.15
143			print <<EOF;
144
145	root	1.22	* * * * * * * * * * * * * * * * * *
146	root	1.15
147
148	root	1.58	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	root	1.60	$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	root	1.58
185			print <<EOF;
186
187			* * * * * * * * * * * * * * * * * *
188
189
190	root	1.23	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	root	1.31	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	root	1.40	loop with kqueue backend if you ask specifically for it.
197	root	1.31
198			Here is what we know:
199	root	1.23
200	root	1.45	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	root	1.28	sockets likely work, ptys definitely don't.
203	root	1.23	OpenBSD: reports indicate that it likely doesn't work
204			(similar problems as on FreeBSD).
205	root	1.45	OS X: completely, utterly broken on at least <= 10.6.
206	root	1.11
207	root	1.15	EOF
208
209	root	1.63	# 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	root	1.37	$can_kqueue = $ENV{EV_KQUEUE} if exists $ENV{EV_KQUEUE};
212	root	1.23	$DEFINE .= " -DEV_USE_KQUEUE=" . (0 + (prompt ("Enable kqueue backend (y/n)?", $can_kqueue ? "y" : "n") =~ /[yY]/));
213	root	1.11
214			print <<EOF;
215
216	root	1.22	* * * * * * * * * * * * * * * * * *
217	root	1.11
218
219	root	1.21	Similarly to the kqueue backend above, EV can take advantage of the
220	root	1.26	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	root	1.21
223			EOF
224
225	root	1.55	$DEFINE .= " -DEV_USE_PORT=" . (0 + (prompt ("Enable event port backend (y/n)?", (have_inc "sys/port.h") ? "y" : "n") =~ /[yY]/));
226	root	1.21
227			print <<EOF;
228
229	root	1.22	* * * * * * * * * * * * * * * * * *
230	root	1.21
231
232	root	1.11	EV needs the functions pthread_atfork and clock_gettime. On most systems
233	root	1.15	you need some special libraries for this (such as -lrt and -lpthread). You
234	root	1.23	can specify additional libraries to provide these calls (and any other
235			required by EV) now, or accept the default.
236	root	1.11
237	root	1.53	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	root	1.11	EOF
242
243	root	1.38	my $solaris_libs = $^O =~ /solaris/i ? "-lsocket -lnsl" : "";
244	root	1.53	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	root	1.15
248	root	1.11
249			print <<EOF;
250
251	root	1.22	* * * * * * * * * * * * * * * * * *
252	root	1.11
253
254	root	1.25	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	root	1.40	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	root	1.25
259			EOF
260
261	root	1.55	my $can_inotify = have_inc "sys/inotify.h";
262	root	1.37	$can_inotify = $ENV{EV_INOTIFY} if exists $ENV{EV_INOTIFY};
263	root	1.25	$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	root	1.36	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	root	1.55	my $can_eventfd = have_inc "sys/eventfd.h";
279	root	1.37	$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	root	1.36
282			print <<EOF;
283
284			* * * * * * * * * * * * * * * * * *
285
286
287	root	1.42	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	root	1.44	wrapper. Glibc 2.7 and later should have this wrapper.
291	root	1.42
292			EOF
293
294	root	1.55	my $can_signalfd = have_inc "sys/signalfd.h";
295	root	1.42	$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	root	1.61	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	root	1.48	Very rarely, people want to tweak EV even more, e.g. to exclude
326	root	1.52	or include certain watcher types or backends. This can be done by adding
327	root	1.48	extra -D options here, or via the EV_EXTRA_DEFS environment variable.
328	root	1.52
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	root	1.48	Normal persons just press enter.
334
335			EOF
336
337	root	1.49	$DEFINE .= " " . prompt "Any extra -D options?", "$ENV{EV_EXTRA_DEFS}";
338	root	1.48
339			print <<EOF;
340
341			* * * * * * * * * * * * * * * * * *
342
343
344	root	1.11	EOF
345
346	root	1.47	my @anyevent = eval { require AnyEvent; $AnyEvent::VERSION < 5.29 } ? (AnyEvent => 5.29) : ();
347	root	1.20
348	root	1.1	WriteMakefile(
349			dist => {
350	root	1.2	PREOP => 'pod2text EV.pm \| tee README >$(DISTVNAME)/README; chmod -R u=rwX,go=rX . ;',
351	root	1.1	COMPRESS => 'gzip -9v',
352			SUFFIX => '.gz',
353			},
354	root	1.10	depend => {
355	root	1.13	"EV.c" => "EV/EVAPI.h "
356	root	1.62	. "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	root	1.30	. "libev/ev_vars.h libev/ev_wrap.h",
358	root	1.10	},
359	root	1.8	INC => "-Ilibev",
360	root	1.11	DEFINE => "$DEFINE",
361	root	1.2	NAME => "EV",
362	root	1.11	LIBS => [$LIBS],
363	root	1.20	PREREQ_PM => {
364			@anyevent,
365	root	1.41	"common::sense" => 0,
366	root	1.20	},
367	root	1.57	CONFIGURE_REQUIRES => { "ExtUtils::MakeMaker" => 6.52, "Canary::Stability" => 0 },
368	root	1.2	VERSION_FROM => "EV.pm",
369	root	1.5	PM => {
370	root	1.54	'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' => '$(INST_LIB)/EV/libev.pod',
375	root	1.5	},
376	root	1.34	MAN3PODS => {
377			'EV.pm' => '$(INST_MAN3DIR)/EV.$(MAN3EXT)',
378			'EV/MakeMaker.pm' => '$(INST_MAN3DIR)/EV::MakeMaker.$(MAN3EXT)',
379	root	1.35	'libev/ev.pod' => '$(INST_MAN3DIR)/EV::libev.$(MAN3EXT)',
380	root	1.34	},
381	root	1.1	);
382