Re: Unexpected tag `anchor` found in struct compound in tagfile

I still don't understand what's going on here.

I made a small example that displays this issue's behaviour in a Github
repo, it should be reproducible, and the README gives (AFAIK) all the info
needed to understand the situation.

https://github.com/trosh/doxygen-struct-anchor-issue

Here's a copy of the README:

This is a pair of fake C projects, *low* and *high*, with *high* depending
on *low*. They each have a header file, which has a typedef to a struct and
a typedef to a pointer to that (all of this documented).

/** ... */
typedef struct {...} OBJECT_s;
/** ... */
typedef OBJECT_s * OBJECT_p;

That is not necessarily a practice I particularly condone, but valid C
nontheless.

Doxyfiles and Makefiles have been provided to generate the documentation
and tagfile for *low*, and the documentation for *high* using *low*'s
tagfile.

A simple call to make in this repo's root will make both docs, and should
hopefully reproduce the warning I am trying to understand / avoid / fix
when building the *high* doc.

low/doxygen.tag:26: warning: Unexpected tag `anchor' found

The mentioned line is the following:

23  <compound kind="struct">
24    <name>object</name>
25    <filename>low_8h.html</filename>
26    <anchor>structobject</anchor>    <!-- CULPRIT LINE -->
27    <member kind="variable">
28      <type>int</type>
29      <name>val</name>
30      <anchorfile>low_8h.html</anchorfile>

To see how the Doxyfiles were made, I included references (made with doxygen
-g) and the differences can be displayed with a simple call to make
Doxyfile-diff which will call diff in both projects.

For info, these are the relevant changes at the time of writing this :

make -C low  Doxyfile-diff

> INLINE_SIMPLE_STRUCTS  = YES
> INPUT                  = .
> GENERATE_LATEX         = NO
> GENERATE_TAGFILE       = doxygen.tag

make -C high Doxyfile-diff

> INPUT                  = .
> GENERATE_LATEX         = NO
> TAGFILES               = ../low/doxygen.tag=../../low/html




Thanks for reading, and I really hope someone can shed some light into
what's going on :-)

> --
John Gliksberg
M2 MIHPS @ UVSQ
mobile : +33.6.40.60.76.95

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