--- EV/Makefile.PL	2007/12/22 05:47:52	1.29
+++ EV/Makefile.PL	2014/09/06 19:03:28	1.56
@@ -1,8 +1,15 @@
-use 5.006;
+use 5.008002;
 
+use strict qw(vars subs);
 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;
 
@@ -36,7 +43,7 @@
 
 
 POSIX optionally offers support for a monotonic clock source. EV
-can take advantage of this clock source to detect time jumps
+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
@@ -45,7 +52,9 @@
 
 EOF
 
-$DEFINE .= " -DEV_USE_MONOTONIC=" . (0 + (prompt ("Enable optional support for CLOCK_MONOTONIC (y/n)?", "y") =~ /[yY]/));
+unless (prompt ("Enable optional support for CLOCK_MONOTONIC (y/n)?", "y") =~ /[yY]/) {
+   $DEFINE .= " -DEV_USE_MONOTONIC=0";
+}
 
 print <<EOF;
 
@@ -55,20 +64,19 @@
 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, so you can disable use and
-probing of this feature altogether here. Otherwise support for this clock
-type will be autodetected at compiletime.
+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
 
-$DEFINE .= " -DEV_USE_REALTIME=" . (0 + (prompt ("Prefer clock_gettime (CLOCK_REALTIME) over gettimeofday (y/n)?", "y") =~ /[yY]/));
+$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 issue. The select
+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
@@ -95,10 +103,10 @@
 
    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;
 
@@ -112,7 +120,7 @@
 
 EOF
 
-$DEFINE .= " -DEV_USE_POLL=" . (0 + (prompt ("Enable poll backend (y/n)?", (-e "/usr/include/poll.h") ? "y" : "n") =~ /[yY]/));
+$DEFINE .= " -DEV_USE_POLL=" . (0 + (prompt ("Enable poll backend (y/n)?", (have_inc "poll.h") ? "y" : "n") =~ /[yY]/));
 
 print <<EOF;
 
@@ -129,7 +137,9 @@
 
 EOF
 
-$DEFINE .= " -DEV_USE_EPOLL=" . (0 + (prompt ("Enable epoll backend (y/n)?", (-e "/usr/include/sys/epoll.h") ? "y" : "n") =~ /[yY]/));
+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;
 
@@ -140,20 +150,23 @@
 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 it defaults to
-'n' on everything but netbsd. Here is what we know:
+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.
 
-NetBSD:  partially working in at least 3.1. Yeah! :)
-FreeBSD: broken on at least 6.2-STABLE,
+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 < 10.5.
+OS X:    completely, utterly broken on at least <= 10.6.
 
 EOF
 
-my $can_kqueue = -e "/usr/include/sys/event.h";
-
+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;
@@ -167,7 +180,7 @@
 
 EOF
 
-$DEFINE .= " -DEV_USE_PORT=" . (0 + (prompt ("Enable event port backend (y/n)?", (-e "/usr/include/sys/port.h") ? "y" : "n") =~ /[yY]/));
+$DEFINE .= " -DEV_USE_PORT=" . (0 + (prompt ("Enable event port backend (y/n)?", (have_inc "sys/port.h") ? "y" : "n") =~ /[yY]/));
 
 print <<EOF;
 
@@ -179,11 +192,16 @@
 can specify additional libraries to provide these calls (and any other
 required by EV) now, or accept the default.
 
-EOF
+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.
 
-$SOLARIS_LIBS = $^O =~ /solaris/ ? " -lsocket -lnsl" : "";
+EOF
 
-$LIBS = prompt "Extra libraries for pthread_atfork and clock_gettime?", "-lpthread -lrt$SOLARIS_LIBS";
+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;
@@ -193,12 +211,13 @@
 
 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 it, it is usually a good idea to enable it.
+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 = -e "/usr/include/sys/inotify.h";
-
+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;
@@ -206,9 +225,61 @@
 *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
 
 
+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 < 2.6 } ? (AnyEvent => 2.6) : ();
+my @anyevent = eval { require AnyEvent; $AnyEvent::VERSION < 5.29 } ? (AnyEvent => 5.29) : ();
 
 WriteMakefile(
     dist	=> {
@@ -219,7 +290,7 @@
     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/event.h libev/event.c libev/ev_vars.h libev/ev_wrap.h",
+               . "libev/ev_vars.h libev/ev_wrap.h",
     },
     INC       => "-Ilibev",
     DEFINE    => "$DEFINE",
@@ -227,14 +298,21 @@
     LIBS => [$LIBS],
     PREREQ_PM => {
        @anyevent,
+       "common::sense" => 0,
     },
     VERSION_FROM => "EV.pm",
     PM           => {
-    		    'EV.pm'		=> '$(INST_LIBDIR)/EV.pm',
-    		    'EV/EVAPI.h'	=> '$(INST_LIBDIR)/EV/EVAPI.h',
-    		    'EV/MakeMaker.pm'	=> '$(INST_LIBDIR)/EV/MakeMaker.pm',
-    		    'libev/ev.h'	=> '$(INST_LIBDIR)/EV/ev.h',
+		    '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)',
+                },
 );