From 0f37f9f05fa4b3b45b419cf83e6b8a2c5b814ebb Mon Sep 17 00:00:00 2001
From: Kent Overstreet <kent.overstreet@linux.dev>
Date: Thu, 20 Apr 2023 12:35:27 -0400
Subject: [PATCH] Add a NO_RUST option

For systems without working rust/llvm/bindgen, add an option for
building without Rust. This will be less of an option in the future, as
more code gets rewritten in Rust.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
---
 Makefile   | 10 +++++++++-
 bcachefs.c |  9 ++++++++-
 2 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index 0793f2a..31fb9ac 100644
--- a/Makefile
+++ b/Makefile
@@ -108,7 +108,15 @@ OBJS=$(SRCS:.c=.o)
 	@echo "    [CC]     $@"
 	$(Q)$(CC) $(CPPFLAGS) $(CFLAGS) -c -o $@ $<
 
-bcachefs: libbcachefs.a rust-src/target/release/libbcachefs_rust.a
+BCACHEFS_DEPS=libbcachefs.a
+
+ifndef NO_RUST
+	BCACHEFS_DEPS+=rust-src/target/release/libbcachefs_rust.a
+else
+	CFLAGS+=-DBCACHEFS_NO_RUST
+endif
+
+bcachefs: $(BCACHEFS_DEPS)
 	@echo "    [LD]     $@"
 	$(Q)$(CC) $(LDFLAGS) -Wl,--whole-archive $+ $(LOADLIBES) -Wl,--no-whole-archive $(LDLIBS) -o $@
 
diff --git a/bcachefs.c b/bcachefs.c
index f6148e2..8616d55 100644
--- a/bcachefs.c
+++ b/bcachefs.c
@@ -35,9 +35,11 @@ static void usage(void)
 	     "  show-super               Dump superblock information to stdout\n"
 	     "  set-option               Set a filesystem option\n"
 	     "\n"
+#ifndef BCACHEFS_NO_RUST
 	     "Mount:\n"
 	     "  mount                    Mount a filesystem\n"
 	     "\n"
+#endif
 	     "Repair:\n"
 	     "  fsck                     Check an existing filesystem for errors\n"
 	     "\n"
@@ -85,7 +87,9 @@ static void usage(void)
 	     "Debug:\n"
 	     "These commands work on offline, unmounted filesystems\n"
 	     "  dump                     Dump filesystem metadata to a qcow2 image\n"
+#ifndef BCACHEFS_NO_RUST
 	     "  list                     List filesystem metadata in textual form\n"
+#endif
 	     "  list_journal             List contents of journal\n"
 	     "\n"
 	     "Miscellaneous:\n"
@@ -231,8 +235,10 @@ int main(int argc, char *argv[])
 
 	if (!strcmp(cmd, "dump"))
 		return cmd_dump(argc, argv);
+#ifndef BCACHEFS_NO_RUST
 	if (!strcmp(cmd, "list"))
 		return cmd_list(argc, argv);
+#endif
 	if (!strcmp(cmd, "list_journal"))
 		return cmd_list_journal(argc, argv);
 	if (!strcmp(cmd, "kill_btree_node"))
@@ -240,11 +246,12 @@ int main(int argc, char *argv[])
 
 	if (!strcmp(cmd, "setattr"))
 		return cmd_setattr(argc, argv);
-
+#ifndef BCACHEFS_NO_RUST
 	if (!strcmp(cmd, "mount")) {
 		cmd_mount(argc, argv);
 		return 0;
 	}
+#endif
 
 #ifdef BCACHEFS_FUSE
 	if (!strcmp(cmd, "fusemount"))
-- 
2.39.2