Re: [PATCH] Makefile: make COMPUTE_HEADER_DEPENDENCIES=auto work with DEVOPTS=pedantic

On Wed, Sep 22, 2021 at 05:03:58PM -0700, Junio C Hamano wrote:

Jeff King [off-list ref] writes:

quoted

I almost suggested using "git.c" as the dummy file, since we know it
must compile anyway. But that probably has other problems (it's more
expensive, and if it _does_ have an error, the results may be
confusing).

It's a shame we can't just try to do the _real_ compiles using the
auto-dependency stuff, and then fall back if they fail. But I think
there's a chicken-and-egg problem there with "make" doing real work, and
figuring out the dependencies to do real work.

Yeah, if compiling any of the real sources is inexpensive enough, I
would think that would be the happy way to go.  Do we have a trivial
source that almost never changes?  Perhaps version.c (especially if
we kick out two helper functions that do not really belong there)?

Perhaps. TBH, I find Ævar's latest patch to just add -Wno-pedantic to be
the simplest and most obviously-correct fix.

-Peff