[PATCH] Make the path to etags used in the build system configurable [PR103021]

Eric Gallager egall@gwmail.gwu.edu
Mon Nov 29 01:34:18 GMT 2021

The attached patch allows users to specify a path to their `etags`
executable for use when doing `make tags`, which is meant to close PR
other/103021: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103021
I based this patch off of this one from upstream automake:
This means that I just supplied variables that the user can override
for the tags programs, rather than having the configure scripts
actually check for them. I handle etags and ctags separately because
the intl subdirectory has separate targets for them. Tested with `make
tags`; the changes I made work successfully, but some of the
subdirectories still have broken tags targets, so I had to switch to
`make -k tags` part way through. This isn't because of anything I did,
though; the `-k` flag is only necessary because of errors that were
already there before I touched anything. Also note that this patch
only affects the subdirectories that use handwritten Makefiles; the
ones that use automake will have to wait until we update the version
of automake used to be 1.16.4 or newer before they'll be fixed.
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