Avoid overwriting unchanged output files in genbki.pl and Gen_fmgrtab.pl. If a particular output file already exists with the contents it should have, leave it alone, so that its mod timestamp is not advanced.
In builds using --enable-depend, this can avoid the need to recompile .c files whose included files didn't actually change. It's not clear whether it saves much of anything for users of ccache; but the cost of doing the file comparisons seems to be negligible, so we might as well do it. For developers using the MSVC toolchain, this will create a regression: msvc/Solution.pm will sometimes run genbki.pl or Gen_fmgrtab.pl unnecessarily. I'll look into fixing that separately. Discussion: https://postgr.es/m/16925.1525376...@sss.pgh.pa.us Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/1f1cd9b5ddc6e7464c1c7416bcce7007fe3bc88c Modified Files -------------- src/backend/catalog/Catalog.pm | 23 ++++++++++++++++++++--- 1 file changed, 20 insertions(+), 3 deletions(-)
