Re: gmake and ccache conspiring together in creating gremlins

[Dmitry Goncharov]

On Mon, Feb 8, 2021 at 12:36 PM Edward Welbourne <edward.welbourne@qt.io> wrote:
> Sounds to me like that's a bug: when the descriptors are closed, the
> part of MAKEFLAGS that claims they're make's jobserver file descriptors
> should be removed, since that's when the claim stops being true.

make uses posix_spawn by default to create children.
posix_spawn makes it difficult to modify env per child.
As a workaround the user can have the recipe remove (or modify) MAKEFLAGS
E.g.

%.o: %.c ; unset MAKEFLAGS && $(CC)  $(CFLAGS) -o $@ -c $<

regards, Dmitry