Re: FreeBSD make fails on BUILT_SOURCES file

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Subject: Re: FreeBSD make fails on BUILT_SOURCES file
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* On 2025 25 Sep 13:41 -0500, Jan Engelhardt wrote:
>=20
> * diff produces a "line-by-line comparison" (terminology from the manpage=
).
>   This is highly wasteful, because in the context of Makefile, we are only
>   interested in a byte-by-byte comparison and stopping at the first misma=
tch.
>   Use cmp.
>=20
> * It is odd to see that they properly used --format=3D%cd for the first p=
art,
>   but then completely forget that there is --format=3D%h for the second p=
art and
>   instead did... barbershop nonsense with | head | cut .

I won't speculate.  I do thank you for your assistance, Jan.

> Anyway. Altogether, something like
>=20
> hamlibdatetime.h: hamlibdatetime.h.in FORCE
> 	${AM_V_at}if test -d $(top_srcdir)/.git; then \
> 		echo "/* This date time is from the last non-merge commit to Hamlib. */=
" >[email protected]; \
> 		echo "#define HAMLIBDATETIME "\"$$(TZ=3DUTC git --git-dir=3D$(top_srcdi=
r)/.git log --no-merges --date=3D'format-local:%Y-%m-%dT%H:%M:%SZ SHA=3D' -=
-format=3D'%cd' -n 1)$$(git --git-dir=3D$(top_srcdir)/.git log --no-merges =
-n 1 --format=3D'%h'\" >[email protected]; \
> 	else \
>  		cp ${srcdir}/hamlibdatetime.h.in [email protected]; \
> 	fi
> 	${AM_V_at}if ! cmp $@ [email protected] >/dev/null 2>/dev/null; then mv [email protected] $@; =
fi; rm -f [email protected]
>=20
> might just fix it for good.

Except I did have to close a parentheses at the end of the second 'echo'
line and then add a '>' to append to the .tmp file instead of
overwriting the line from the first 'echo'.

I really appreciate the refactor and so far it seems to be working.
With your permission I will credit you as the author when I commit the
changes.

- Nate

--=20
"The optimist proclaims that we live in the best of all
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Web: https://www.n0nb.us
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