From b14b1f779c74dff779a2c45fc2e912a732078157 Mon Sep 17 00:00:00 2001
From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Tue, 12 Jan 2021 18:27:52 +0000
Subject: [PATCH] cargo: filter out stupid doc output warnings

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>
---
 .cargo-doc-suppress-errors | 6 ++++++
 Makefile                   | 2 +-
 2 files changed, 7 insertions(+), 1 deletion(-)
 create mode 100644 .cargo-doc-suppress-errors

diff --git a/.cargo-doc-suppress-errors b/.cargo-doc-suppress-errors
new file mode 100644
index 00000000..8ae18ff3
--- /dev/null
+++ b/.cargo-doc-suppress-errors
@@ -0,0 +1,6 @@
+The lib target `.*` in package `.*` has the same output filename as the lib target `.*` in package `.*`.
+Colliding filename is:.*
+The targets should have unique names.
+This is a known bug where multiple crates with the same name use
+the same path; see <https://github\.com/rust-lang/cargo/issues/6313>\.
+warning: output filename collision\.
diff --git a/Makefile b/Makefile
index de000664..aeaef80e 100644
--- a/Makefile
+++ b/Makefile
@@ -162,7 +162,7 @@ stamp/cargo-wdt.debug: $(call rsrcs,.)
 	$(stamp)
 
 stamp/cargo.doc: $(call rsrcs,.)
-	$(CARGO) doc --workspace
+	$(CARGO) doc --workspace 2>&1 | egrep -vf .cargo-doc-suppress-errors
 	$(stamp)
 
 $(addprefix stamp/cargo.wasm-,$(DR)):: \
-- 
2.30.2