Still getting multiple -march with LDC

[p0nce]

OS Mac OS X

Project to reproduce https://github.com/p0nce/dplug/blob/master/examples/distort/dub.json

DUB version master @ 548dc1b

Problem
$ dub build --compiler=ldc2 => OK

Performing "debug" build using ldc2 for x86_64.
gfm:core 3.0.4: target for configuration "library" is up to date.
dplug:core 1.1.28: target for configuration "library" is up to date.
gfm:math 3.0.4: target for configuration "library" is up to date.
dplug:dsp 1.1.28: target for configuration "library" is up to date.
ae-graphics 0.0.7: target for configuration "library" is up to date.
dplug:plugin 1.1.28: target for configuration "library" is up to date.
derelict-util 2.0.3: target for configuration "library" is up to date.
derelict-cocoa 0.0.25: target for configuration "library" is up to date.
x11 1.0.8: target for configuration "library" is up to date.
dplug:window 1.1.28: target for configuration "library" is up to date.
imageformats 4.2.2: target for configuration "library" is up to date.
gfm:image 3.0.4: target for configuration "library" is up to date.
dplug:gui 1.1.28: target for configuration "library" is up to date.
dplug:vst 1.1.28: target for configuration "library" is up to date.
distort ~master: target for configuration "library" is up to date.
To force a rebuild of up-to-date targets, run again with --force.

$ dub build --compiler=ldc2 -a x86 => FAIL

Performing "debug" build using ldc2 for x86.
gfm:core 3.0.4: target for configuration "library" is up to date.
dplug:core 1.1.28: target for configuration "library" is up to date.
gfm:math 3.0.4: target for configuration "library" is up to date.
dplug:dsp 1.1.28: target for configuration "library" is up to date.
ae-graphics 0.0.7: target for configuration "library" is up to date.
dplug:plugin 1.1.28: building configuration "library"...
ldc2: for the -march option: may only occur zero or one times!
ldc2 failed with exit code 1.

$ dub build --compiler=ldc2 -a x86_64 => FAIL

Performing "debug" build using ldc2 for x86_64.
gfm:core 3.0.4: target for configuration "library" is up to date.
dplug:core 1.1.28: target for configuration "library" is up to date.
gfm:math 3.0.4: target for configuration "library" is up to date.
dplug:dsp 1.1.28: target for configuration "library" is up to date.
ae-graphics 0.0.7: target for configuration "library" is up to date.
dplug:plugin 1.1.28: building configuration "library"...
ldc2: for the -march option: may only occur zero or one times!
ldc2 failed with exit code 1.

In other words, it generates multiple -march in non-trivial projects whenever the --arch switch is used.

[p0nce]

Would you take BountySource donations? What would be the price for this item?

[tsbockman]

This affects me also (I'm on Linux x64).

[p0nce]

Whoa thanks @tsbockman 👍

[tsbockman]

@p0nce Don't thank me - my patch turned out not to be good.

@s-ludwig did all the work on the one he actually merged.