[PATCH 2/2] f3: define F3_NS in cflags rather than C code

[Eric Wong <e@80x24.org>]

This enhances reusability in other projects which use the same C
shim.  The executable will also be `lei.fuse' rather than `leifs',
because `leifs' is likely confused as `leafs' which makes no
sense.
---
 lib/PublicInbox/LeiF3.pm | 5 +++--
 lib/PublicInbox/f3.h     | 6 ++++--
 2 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/lib/PublicInbox/LeiF3.pm b/lib/PublicInbox/LeiF3.pm
index 74ad135d..1121340a 100644
--- a/lib/PublicInbox/LeiF3.pm
+++ b/lib/PublicInbox/LeiF3.pm
@@ -13,11 +13,12 @@ use PublicInbox::Spawn;
 my $dir = ($ENV{PERL_INLINE_DIRECTORY} //
 	die('BUG: PERL_INLINE_DIRECTORY unset')) . '/f3';
 my $F3_NS = 'lei';
-my $bin = "$dir/${F3_NS}fs.fuse";
+my $bin = "$dir/${F3_NS}.fuse";
 my ($srcpfx) = (__FILE__ =~ m!\A(.+/)[^/]+\z!);
 my @srcs = map { $srcpfx.$_ } qw(f3.h);
 my $xflags = ($ENV{CFLAGS} // '-Wall -ggdb3 -O0') . ' ' .
-	($ENV{LDFLAGS} // '-Wl,-O1 -Wl,--compress-debug-sections=zlib');
+	($ENV{LDFLAGS} // '-Wl,-O1 -Wl,--compress-debug-sections=zlib') .
+	qq{ -DF3_NS='"$F3_NS"'};
 
 sub xflags_chg () {
 	open my $fh, '<', "$dir/XFLAGS" or return 1;
diff --git a/lib/PublicInbox/f3.h b/lib/PublicInbox/f3.h
index 4494e61b..4572f7f2 100644
--- a/lib/PublicInbox/f3.h
+++ b/lib/PublicInbox/f3.h
@@ -8,7 +8,9 @@
  */
 
 /* another project may use this: */
-#define F3_NS "lei"
+#ifndef F3_NS
+#error F3_NS not defined
+#endif
 
 #define _GNU_SOURCE
 #define _FILE_OFFSET_BITS 64
@@ -126,7 +128,7 @@ static struct f3_data f3 = {
 };
 
 static const struct fuse_opt f3_opt[] = {
-	/* *-fd and root-vid are internal knobs */
+	/* *-fd and root-vid are internal knobs used by perl mount wrapper */
 	{ "reader-fd=%d", offsetof(struct f3_data, rfd) },
 	{ "worker-fd=%d", offsetof(struct f3_data, wfd) },
 	{ "root-vid=%"PRId64, offsetof(struct f3_data, vroot.vid) },