Build failure on macos with OCaml 4.05: implicit declaration of function 'Assert' is invalid in C99

[shonfeder]

Hi!

I'm seeing the following build failure on our MacOS github runner:

- File "dune", line 9, characters 9-25:
- 9 |   (names stdcompat__stubs))
-              ^^^^^^^^^^^^^^^^
- (cd _build/default && /usr/bin/cc -O2 -fno-strict-aliasing -fwrapv -D_FILE_OFFSET_BITS=64 -D_REENTRANT -O2 -fno-strict-aliasing -fwrapv -D_FILE_OFFSET_BITS=64 -D_REENTRANT -g -I /Users/runner/work/omd/omd/_opam/lib/ocaml -o stdcompat__stubs.o -c stdcompat__stubs.c)
- In file included from stdcompat__stubs.c:25:
- In file included from /Users/runner/work/omd/omd/_opam/lib/ocaml/caml/memory.h:28:
- /Users/runner/work/omd/omd/_opam/lib/ocaml/caml/minor_gc.h:102:3: error: implicit declaration of function 'Assert' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
-   Assert(ephe_ref->offset < Wosize_val(ephe_ref->ephe));
-   ^
- 1 error generated.

This is on

• MacOS 11.6.8
• OCaml 4.05

You can see the build failure here: https://github.com/ocaml/omd/runs/8197411068?check_suite_focus=true

Thanks for the great utility and please let me know if I can help.