Bug#1118272: dh-fortran-mod

[Santiago Vila]

On Mon, Oct 20, 2025 at 07:32:59AM +0100, Alastair McKinstry wrote:

> Yes. I did a number of uploads yesterday and its probably down to only one
> case left - slepc; but there may be follow-ons; Leave this bug open for
> tracking;

Note: The "dcl" package (which I put in the affects) behaves in a very
particular way:

- On systems with only one CPU, tried a lot of times, it builds ok.

- On systems with 2 CPUs, tried also a lot of times, it fails to build in this way:

dh_missing: warning: usr/include/vst_interface.mod exists in debian/tmp but is not installed to anywhere 
dh_missing: warning: usr/include/xfc_interface.mod exists in debian/tmp but is not installed to anywhere 
dh_missing: error: missing files, aborting
        The following debhelper tools have reported what they installed (with files per package)
         * dh_install: dcl-f77 (0), dcl-f77-docs (3), fonts-dclfonts (4), libf77dcl-dev (5), libf77dcl7 (3)
         * dh_installdocs: dcl-f77 (1), dcl-f77-docs (1), fonts-dclfonts (1), libf77dcl-dev (1), libf77dcl7 (1)
         * dh_installman: dcl-f77 (0), dcl-f77-docs (0), fonts-dclfonts (0), libf77dcl-dev (2), libf77dcl7 (0)
        If the missing files are installed by another tool, please file a bug against it.
        When filing the report, if the tool is not part of debhelper itself, please reference the
        "Logging helpers and dh_missing" section from the "PROGRAMMING" guide for debhelper (10.6.3+).
          (in the debhelper package: /usr/share/doc/debhelper/PROGRAMMING.md.gz)
        Be sure to test with dpkg-buildpackage -A/-B as the results may vary when only a subset is built
        If the omission is intentional or no other helper can take care of this consider adding the
        paths to debian/not-installed.
make: *** [debian/rules:17: binary] Error 255
dpkg-buildpackage: error: debian/rules binary subprocess returned exit status 2


This erratic behaviour started happening only after the upload of
dh-fortran-mod on 2025-10-16, while the version of the "dcl" package
has not changed at all since trixie, so I believe dh-fortran-mod
is still to blame for the FTBFS issue in "dcl".

If you need a VM to reproduce this odd issue, please contact me
privately.

Thanks.