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-rw-r--r--lib/PublicInbox/XapHelperCxx.pm1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/PublicInbox/XapHelperCxx.pm b/lib/PublicInbox/XapHelperCxx.pm
index 74852ad1..922bd583 100644
--- a/lib/PublicInbox/XapHelperCxx.pm
+++ b/lib/PublicInbox/XapHelperCxx.pm
@@ -34,6 +34,7 @@ my $ldflags = '-Wl,-O1';
 $ldflags .= ' -Wl,--compress-debug-sections=zlib' if $^O ne 'openbsd';
 my $xflags = ($ENV{CXXFLAGS} // '-Wall -ggdb3 -pipe') . ' ' .
         ' -DTHREADID=' . PublicInbox::Search::THREADID .
+        ' -DSHARD_COST=' . PublicInbox::Search::SHARD_COST .
         ' -DXH_SPEC="'.join('',
                 map { s/=.*/:/; $_ } @PublicInbox::Search::XH_SPEC) . '" ' .
         ($ENV{LDFLAGS} // $ldflags);