Re: make_ctags: use -I option to ignore pg_node_attr macro

>> Since this commit, make_etags has started failing to generate
>> tags files with the following error messages, on my MacOS.
>>
>> $ src/tools/make_etags
>> /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ctags:
>> illegal option -- e
>> usage: ctags [-BFadtuwvx] [-f tagsfile] file ...
>> sort: No such file or directory
>>
>>
>> In my MacOS, non-Exuberant ctags is installed and doesn't support
>> -e option. But the commit changed make_etags so that it always
>> calls ctags with -e option via make_ctags. This seems the cause of
>> the above failure.
>>
>> IS_EXUBERANT=""
>> ctags --version 2>&1 | grep Exuberant && IS_EXUBERANT="Y"
>>
>> make_ctags has the above code and seems to support non-Exuberant
>> ctags.
>> If so, we should revert the changes of make_etags by the commit and
>> make make_etags work with that ctags? Or, we should support
>> only Exuberant-type ctags (btw, I'm ok with this) and get rid of
>> something like the above code?
>
> Thanks for the report. I will look into this.

Previous make_etags relied on etags command:

#!/bin/sh

# src/tools/make_etags

command -v etags >/dev/null || \
{ echo "'etags' program not found" 1>&2; exit 1; }
:
:

My Mac (M1 Mac running macOS 12.6) does not have etags. Thus before
the commit make_etags on Mac failed anyway. Do we want make_etags to
restore the previous behavior? i.e. 'etags' program not found

>> If so, we should revert the changes of make_etags by the commit and
>> make make_etags work with that ctags?

I think ctags on Mac cannot produce tags file for emacs.

Best reagards,
--
Tatsuo Ishii
SRA OSS LLC
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