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use 5.008002; |
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|
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use strict qw(vars subs); |
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use Config; |
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use ExtUtils::MakeMaker; |
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|
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sub have_inc($) { |
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scalar grep -r "$_/$_[0]", $Config{usrinc}, split / /, $Config{incpth} |
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} |
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|
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my $DEFINE; |
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|
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unless (-e "libev/ev_epoll.c") { |
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print <<EOF; |
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|
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*** |
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*** ERROR: libev is missing or damaged. If you used a CVS check-out of EV, |
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*** you also have to check-out the "libev" module from the same CVS |
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*** repository into the EV dir (i.e. EV/libev from outside). |
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*** |
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|
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EOF |
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exit 1; |
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} |
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|
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print <<EOF; |
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|
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*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** |
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|
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|
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Welcome to EV configuration. If you are in a hurry, just press return here |
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and hope for the best. The defaults should usually do. |
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|
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EOF |
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|
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if (prompt ("Skip further questions and use defaults (y/n)?", "y") =~ /[yY]/) { |
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$ENV{PERL_MM_USE_DEFAULT} = 1; |
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} |
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|
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print <<EOF; |
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|
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*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** |
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|
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|
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POSIX optionally offers support for a monotonic clock source. EV |
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can take advantage of this clock source to detect time jumps more |
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reliably. Unfortunately, some systems are bound to be broken, so you can |
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disable this here: you can completely disable the detection and use of |
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the monotonic clock by answering 'n' here. Support for this clock type |
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will otherwise be autodetected at both compile- and runtime. (this setting |
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currently affects the use of nanosleep over select as well). |
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|
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EOF |
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|
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unless (prompt ("Enable optional support for CLOCK_MONOTONIC (y/n)?", "y") =~ /[yY]/) { |
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$DEFINE .= " -DEV_USE_MONOTONIC=0"; |
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} |
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|
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print <<EOF; |
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|
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*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** |
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|
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|
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POSIX optionally offers support for a (potentially) high-resolution |
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realtime clock interface. In a good implementation, using it is faster |
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than the normal method of using gettimeofday. Unfortunately, this option |
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is also bound to be broken on some systems, and current EV versions do not |
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actually call gettimeofday very often, so it defaults to no. |
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|
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EOF |
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|
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$DEFINE .= " -DEV_USE_REALTIME=" . (0 + (prompt ("Prefer clock_gettime (CLOCK_REALTIME) over gettimeofday (y/n)?", "n") =~ /[yY]/)); |
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|
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print <<EOF; |
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|
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*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** |
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|
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|
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EV can use various backends with various portability issues. The select |
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backend is the most portable and makes for a good fallback, but it can be |
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limited to a low number of file descriptors and/or might not compile. If |
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you have problems with compiling ev_select.c, you might try to play around |
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with disabling it here, or forcing it to use the fd_set provided by your |
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OS, via the next question. I highly recommend keeping it in. |
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|
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EOF |
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|
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if (prompt ("Enable select backend (y/n)?", "y") =~ /[yY]/) { |
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$DEFINE .= " -DEV_USE_SELECT=1"; |
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|
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print <<EOF; |
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|
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*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** |
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|
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|
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The select backend can operate in two modes. One uses the system-provided |
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fd_set and is usually limited to 1024 file descriptors (64 on windows), |
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the other requires your header files to define NFDBITS and declare a |
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suitable fd_mask type. If you run into problems compiling ev_select.c, you |
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can try forcing the use of the system fd_set here. |
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|
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EOF |
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|
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if (prompt ("Force use of system fd_set for select backend (y/n)?", "n") =~ /[yY]/) { |
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$DEFINE .= " -DEV_SELECT_USE_FD_SET"; |
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} |
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} else { |
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$DEFINE .= " -DEV_USE_SELECT=0"; |
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} |
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|
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print <<EOF; |
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|
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*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** |
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|
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|
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The second very portable backend is poll(2). It does not exist on windows |
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and various versions of Mac OS X (and on the other versions it simply |
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doesn't work), but works basically everywhere else. It is recommended to use |
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the default here unless you run into compile problems in ev_poll.c. |
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|
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EOF |
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|
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$DEFINE .= " -DEV_USE_POLL=" . (0 + (prompt ("Enable poll backend (y/n)?", (have_inc "poll.h") ? "y" : "n") =~ /[yY]/)); |
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|
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print <<EOF; |
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|
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*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** |
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|
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|
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Select and poll make it hard to write efficient servers, especially if the |
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number of active connections is much lower than the watched ones. GNU/Linux |
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systems have a more scalable method called "epoll", which EV can use. For |
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this to work, both your kernel and glibc have to support epoll, but if you |
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can compile it, the detection will be done at runtime, and EV will safely |
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fall back to using select when epoll isn't available. If unsure, accept |
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the default. |
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|
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EOF |
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|
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my $can_epoll = have_inc "sys/epoll.h"; |
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$can_epoll = $ENV{EV_EPOLL} if exists $ENV{EV_EPOLL}; |
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$DEFINE .= " -DEV_USE_EPOLL=" . (0 + (prompt ("Enable epoll backend (y/n)?", $can_epoll ? "y" : "n") =~ /[yY]/)); |
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|
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print <<EOF; |
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|
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*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** |
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|
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|
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Similarly to the epoll backend above, EV can take advantage of kqueue on |
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many BSD systems. Support for kqueue will be detected at runtime, with a |
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safe fallback to other methods when it cannot be used. |
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|
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Note that kqueue is broken on most operating systems, so by default it |
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won't be used on many platforms, but you can still create your own event |
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loop with kqueue backend if you ask specifically for it. |
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|
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Here is what we know: |
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|
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NetBSD: partially working in at least 3.1 and later. Yeah! :) |
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FreeBSD: broken on at least 6.2-STABLE, spotty in later versions, |
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sockets *likely* work, ptys definitely don't. |
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OpenBSD: reports indicate that it likely doesn't work |
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(similar problems as on FreeBSD). |
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OS X: completely, utterly broken on at least <= 10.6. |
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|
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EOF |
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|
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my $can_kqueue = have_inc "sys/event.h"; |
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$can_kqueue = $ENV{EV_KQUEUE} if exists $ENV{EV_KQUEUE}; |
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$DEFINE .= " -DEV_USE_KQUEUE=" . (0 + (prompt ("Enable kqueue backend (y/n)?", $can_kqueue ? "y" : "n") =~ /[yY]/)); |
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|
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print <<EOF; |
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|
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*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** |
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|
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|
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Similarly to the kqueue backend above, EV can take advantage of the |
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solaris 10 event port interface. Support for event ports will be detected |
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at runtime, with a safe fallback to other methods when it cannot be used. |
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|
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EOF |
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|
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$DEFINE .= " -DEV_USE_PORT=" . (0 + (prompt ("Enable event port backend (y/n)?", (have_inc "sys/port.h") ? "y" : "n") =~ /[yY]/)); |
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|
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print <<EOF; |
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|
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*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** |
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|
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|
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EV needs the functions pthread_atfork and clock_gettime. On most systems |
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you need some special libraries for this (such as -lrt and -lpthread). You |
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can specify additional libraries to provide these calls (and any other |
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required by EV) now, or accept the default. |
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|
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On GNU/Linux systems, EV uses the LSB 3.1 __register_atfork function |
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to avoid the dependency on libpthread, and directly uses the clock_gettime |
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syscall to avoid a dependency on librt. |
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|
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EOF |
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|
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my $solaris_libs = $^O =~ /solaris/i ? "-lsocket -lnsl" : ""; |
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my $librt = $^O =~ /linux/i ? "" : "-lpthread -lrt"; |
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my $LIBS = exists $ENV{EV_LIBS} ? $ENV{EV_LIBS} : "$librt $solaris_libs"; |
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$LIBS = prompt "Extra libraries for pthread_atfork and clock_gettime?", $LIBS; |
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|
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|
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print <<EOF; |
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|
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*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** |
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|
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|
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A backend of a different kind is the Linux inotify(7) interface, which can |
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be used to speed up (and reduce resource consumption) of stat watchers. If |
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you have the include file and libc support for it, it is usually a good |
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idea to enable it, as kernel availability is detected at runtime. |
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|
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EOF |
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|
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my $can_inotify = have_inc "sys/inotify.h"; |
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$can_inotify = $ENV{EV_INOTIFY} if exists $ENV{EV_INOTIFY}; |
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$DEFINE .= " -DEV_USE_INOTIFY=" . (0 + (prompt ("Enable inotify support (y/n)?", $can_inotify ? "y" : "n") =~ /[yY]/)); |
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|
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print <<EOF; |
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|
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*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** |
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|
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|
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Another useful bit of functionality is the Linux eventfd, which is useful |
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for faster signal handling (don't care) and intra-thread communications |
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(more relevant). Kernel support for this will be probed at runtime, but |
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your libc must contain the necessary wrapper. Glibc 2.7 and later should |
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have this wrapper. |
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|
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EOF |
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|
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my $can_eventfd = have_inc "sys/eventfd.h"; |
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$can_eventfd = $ENV{EV_EVENTFD} if exists $ENV{EV_EVENTFD}; |
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$DEFINE .= " -DEV_USE_EVENTFD=" . (0 + (prompt ("Enable linux eventfd support (y/n)?", $can_eventfd ? "y" : "n") =~ /[yY]/)); |
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|
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print <<EOF; |
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|
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*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** |
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|
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|
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Another sometimes useful bit of functionality is the Linux signalfd, which |
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is useful for faster signal handling (don't care). Kernel support for |
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this will be probed at runtime, but your libc must contain the necessary |
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wrapper. Glibc 2.7 and later should have this wrapper. |
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|
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EOF |
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|
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my $can_signalfd = have_inc "sys/signalfd.h"; |
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$can_signalfd = $ENV{EV_SIGNALFD} if exists $ENV{EV_SIGNALFD}; |
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$DEFINE .= " -DEV_USE_SIGNALFD=" . (0 + (prompt ("Enable linux signalfd support (y/n)?", $can_signalfd ? "y" : "n") =~ /[yY]/)); |
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|
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print <<EOF; |
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|
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*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** |
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|
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|
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Very rarely, people want to tweak EV even more, e.g. to exclude |
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or include certain watcher types or backends. This can be done by adding |
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extra -D options here, or via the EV_EXTRA_DEFS environment variable. |
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|
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For example, if you run into compile problems because of missing memory |
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fences (or you just want extra performance), you can tell EV to not support |
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smp and threads via -DEV_NO_THREADS. |
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|
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Normal persons just press enter. |
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|
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EOF |
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|
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$DEFINE .= " " . prompt "Any extra -D options?", "$ENV{EV_EXTRA_DEFS}"; |
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|
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print <<EOF; |
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|
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*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** |
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|
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|
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EOF |
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|
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my @anyevent = eval { require AnyEvent; $AnyEvent::VERSION < 5.29 } ? (AnyEvent => 5.29) : (); |
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|
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WriteMakefile( |
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dist => { |
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PREOP => 'pod2text EV.pm | tee README >$(DISTVNAME)/README; chmod -R u=rwX,go=rX . ;', |
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COMPRESS => 'gzip -9v', |
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SUFFIX => '.gz', |
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}, |
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depend => { |
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"EV.c" => "EV/EVAPI.h " |
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. "libev/ev.c libev/ev.h libev/ev_epoll.c libev/ev_select.c libev/ev_kqueue.c libev/ev_poll.c " |
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. "libev/ev_vars.h libev/ev_wrap.h", |
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}, |
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INC => "-Ilibev", |
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DEFINE => "$DEFINE", |
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NAME => "EV", |
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LIBS => [$LIBS], |
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PREREQ_PM => { |
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@anyevent, |
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"common::sense" => 0, |
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}, |
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VERSION_FROM => "EV.pm", |
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PM => { |
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'EV.pm' => '$(INST_LIB)/EV.pm', |
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'EV/EVAPI.h' => '$(INST_LIB)/EV/EVAPI.h', |
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'EV/MakeMaker.pm' => '$(INST_LIB)/EV/MakeMaker.pm', |
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'libev/ev.h' => '$(INST_LIB)/EV/ev.h', |
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'libev/ev.pod' => '$(INST_LIB)/EV/libev.pod', |
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}, |
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MAN3PODS => { |
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'EV.pm' => '$(INST_MAN3DIR)/EV.$(MAN3EXT)', |
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'EV/MakeMaker.pm' => '$(INST_MAN3DIR)/EV::MakeMaker.$(MAN3EXT)', |
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'libev/ev.pod' => '$(INST_MAN3DIR)/EV::libev.$(MAN3EXT)', |
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}, |
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); |
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|
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|