syscall: support sparc64 (and maybe other big-endian systems)

Thanks to the GCC compile farm project, we can wire up syscalls
for sparc64 and set system-specific SFD_* constants properly.

I've FINALLY figured out how to use POSIX::SigSet to generate
a usable buffer for the syscall perlfunc.  This is required
for endian-neutral behavior and relevant to sparc64, at least.

There's no need for signalfd-related stuff to be constants,
either.  signalfd initialization is never a hot path and a stub
subroutine for constants uses several KB of memory in the
interpreter.

We'll drop the needless SEEK_CUR import while we're importing
O_NONBLOCK, too.

1 files changed, 2 insertions, 2 deletions

diff --git a/script/public-inbox-watch b/script/public-inbox-watch
index c07d45d7..20534bf2 100755
--- a/script/public-inbox-watch
+++ b/script/public-inbox-watch
@@ -7,7 +7,7 @@ use PublicInbox::WatchMaildir;
 use PublicInbox::Config;
 use PublicInbox::DS;
 use PublicInbox::Sigfd;
-use PublicInbox::Syscall qw(SFD_NONBLOCK);
+use PublicInbox::Syscall qw($SFD_NONBLOCK);
 my $oldset = PublicInbox::Sigfd::block_signals();
 STDOUT->autoflush(1);
 STDERR->autoflush(1);
@@ -35,7 +35,7 @@ if ($watch_md) {
         unless (grep(/\A--no-scan\z/, @ARGV)) {
                 PublicInbox::DS::requeue($scan);
         }
-        my $sigfd = PublicInbox::Sigfd->new($sig, SFD_NONBLOCK);
+        my $sigfd = PublicInbox::Sigfd->new($sig, $SFD_NONBLOCK);
         local %SIG = (%SIG, %$sig) if !$sigfd;
         if (!$sigfd) {
                 PublicInbox::Sigfd::set_sigmask($oldset);