GCC 16, the -MD -MF<file-for-dependencies> is not filled when compilation fails.

Basile STARYNKEVITCH <[email protected]> Wed, 27 May 2026 08:24:35 +0200

Newsgroups	gmane.comp.gcc.devel
Message-ID	<[email protected]>

Hello all,

(see https://github.com/RefPerSys/RefPerSys compiled on RaspBerryPi
Linux for an example)

When compiling a source code with GCC 16.1 (on RaspberryPi
Linux/Debian, using GNU make 4.4 with guile) the file written for
dependencies with -MF is not filled on compilation failure

Is there any way (without patching GCC 16 source code or writing a
plugin for it) to get the dependency file filled?

It would be very useful to help debugging rather complex makefiles.

Thanks
-- 

Basile STARYNKEVITCH                           
<[email protected]>
8 rue de la Faïencerie                      
http://starynkevitch.net/Basile/  
92340 Bourg-la-Reine                        
https://github.com/bstarynk
France                               
https://github.com/RefPerSys/RefPerSys
                  https://orcid.org/0000-0003-0908-5250