Merge branch 'ps/rust-balloon'

Dip our toes a bit to (optionally) use Rust implemented helper
called from our C code.

* ps/rust-balloon:
  ci: enable Rust for breaking-changes jobs
  ci: convert "pedantic" job into full build with breaking changes
  BreakingChanges: announce Rust becoming mandatory
  varint: reimplement as test balloon for Rust
  varint: use explicit width for integers
  help: report on whether or not Rust is enabled
  Makefile: introduce infrastructure to build internal Rust library
  Makefile: reorder sources after includes
  meson: add infrastructure to build internal Rust library

1 files changed, 2 insertions, 2 deletions

diff --git a/varint.h b/varint.h
index f78bb0ca52..eb401935bd 100644
--- a/varint.h
+++ b/varint.h
@@ -1,7 +1,7 @@
 #ifndef VARINT_H
 #define VARINT_H
 
-int encode_varint(uintmax_t, unsigned char *);
-uintmax_t decode_varint(const unsigned char **);
+uint8_t encode_varint(uint64_t, unsigned char *);
+uint64_t decode_varint(const unsigned char **);
 
 #endif /* VARINT_H */