https://issues.dlang.org/show_bug.cgi?id=16746

Iain Buclaw <ibuclaw@gdcproject.org> changed:

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--- Comment #1 from Iain Buclaw <ibuclaw@gdcproject.org> ---
(In reply to Matthias Klumpp from comment #0)
> Outputting both formats would be helpful, GDC has `-fdeps=` and `-fmake-deps=` for that (with the latter option leading to a crash unfortunately).

Where's the bug report?

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https://issues.dlang.org/show_bug.cgi?id=16746

--- Comment #2 from Matthias Klumpp <matthias@tenstral.net> ---
(In reply to Iain Buclaw from comment #1)
> (In reply to Matthias Klumpp from comment #0)
> > Outputting both formats would be helpful, GDC has `-fdeps=` and `-fmake-deps=` for that (with the latter option leading to a crash unfortunately).
> 
> Where's the bug report?

I didn't create one yet because I was under time pressure when finding that out - and for a proper bug report I would need a bit more information (or else the first question after telling "it crashes" would be "can you provide an example", since a simple "Hello world" doesn't seem to trigger this).

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https://issues.dlang.org/show_bug.cgi?id=16746

Johannes Pfau <johannespfau@gmail.com> changed:

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--- Comment #3 from Johannes Pfau <johannespfau@gmail.com> ---
@Matthias a GDC test case would be really appreciated. This should be easily reducible with Dustmite https://github.com/CyberShadow/DustMite . But if you don't have the time to reduce the code you can also send the complete code to my email address. Alternatively if it's a OSS project anyway just provide some instructions to reproduce the problem and I'll get a reduced test case.

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https://issues.dlang.org/show_bug.cgi?id=16746

Vladimir Panteleev <thecybershadow@gmail.com> changed:

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--- Comment #4 from Vladimir Panteleev <thecybershadow@gmail.com> ---
Matthias, have you seen rdmd's --makedepend flag? I think it may do what you need.

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https://issues.dlang.org/show_bug.cgi?id=16746

--- Comment #5 from Matthias Klumpp <matthias@tenstral.net> ---
(In reply to Johannes Pfau from comment #3)
> @Matthias a GDC test case would be really appreciated. This should be easily reducible with Dustmite https://github.com/CyberShadow/DustMite . But if you don't have the time to reduce the code you can also send the complete code to my email address. Alternatively if it's a OSS project anyway just provide some instructions to reproduce the problem and I'll get a reduced test case.

Looks like this is all resolved with GDC 6 \o/ - I can't reproduce any of the issues and -fmake-deps seems to work pretty well, unless https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=807491 is still a thing.

Anyway, I submitted a patch to Meson to use this by default for GDC now: https://github.com/ximion/meson/commit/0deb7a9e0c5e358dc7d1d07d8ac10b5c82ce33cd

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https://issues.dlang.org/show_bug.cgi?id=16746

--- Comment #6 from Matthias Klumpp <matthias@tenstral.net> ---
(In reply to Vladimir Panteleev from comment #4)
> Matthias, have you seen rdmd's --makedepend flag? I think it may do what you need.

This is indeed what I am looking for - does dmd have this too and I am just not
seeing it?
(dmd --help didn't show something useful)

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https://issues.dlang.org/show_bug.cgi?id=16746

greenify <greeenify@gmail.com> changed:

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--- Comment #7 from greenify <greeenify@gmail.com> ---
> This is indeed what I am looking for - does dmd have this too and I am just not seeing it?
(dmd --help didn't show something useful)

No - it's implemented here:

https://github.com/dlang/tools/blob/master/rdmd.d#L346

You package `rdmd` as well, right? Or is there a problem with using `rdmd`?

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https://issues.dlang.org/show_bug.cgi?id=16746

--- Comment #8 from Matthias Klumpp <matthias@tenstral.net> ---
(In reply to greenify from comment #7)
> [...]
> You package `rdmd` as well, right?

No, there is nothing using it in Debian (and we already lack manpower for the
existing packages).

> Or is there a problem with using `rdmd`?

Yes, it doesn't support all command-line flags one would use with ldc, gdc or dmd. Any wrapper is not an option.

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https://issues.dlang.org/show_bug.cgi?id=16746

--- Comment #9 from Vladimir Panteleev <thecybershadow@gmail.com> ---
(In reply to Matthias Klumpp from comment #8)
> Yes, it doesn't support all command-line flags one would use with ldc, gdc or dmd.

rdmd simply forwards flags it doesn't recognize to the compiler.

> Any wrapper is not an option.

Why?

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https://issues.dlang.org/show_bug.cgi?id=16746

--- Comment #10 from Matthias Klumpp <matthias@tenstral.net> ---
(In reply to Vladimir Panteleev from comment #9)
> (In reply to Matthias Klumpp from comment #8)
> > Yes, it doesn't support all command-line flags one would use with ldc, gdc or dmd.
> 
> rdmd simply forwards flags it doesn't recognize to the compiler.
> 
> > Any wrapper is not an option.
> 
> Why?

Because the wrapper is not available everywhere, and going through a wrapper in
order to fix a missing thing in dmd is just a workaround. DMD(FE) should be
able to do this natively.
When adding support to Meson/CMake/Automake/Makefiles, telling users that they
need the compiler but also this other tool which - in the Meson world - has the
sole purpose of supplying a missing functionality in DMD is pretty cumbersome.
It's a workaround, but no real solution to the issue.

At the moment, Debian/Uhuntu/Fedora/OpenSUSE and probably a couple of other don't ehip rdmd at all, which makes demanding it just to work around this bug not worthwile anyway.

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