Thanks!

From the ldmd2 --version output, I conjecture that the compiler version is too old: That LDC version is based on DMD 2.074. D (the language) occasionally introduces new features with minor releases of the reference compiler DMD, which is at 2.083.0.

The exact failure is: In a dependency of Lix, your LDC trips over static foreach, a feature introduced into D in late 2017.

But Fedora 27 offers no newer LDC than what you have. Ideas:

• Install the Fedora package of the reference compiler DMD 2.083.
• Maybe my binary Linux 64-bit Lix 0.9.21 works? It was built on Arch Linux and thus might rely on too new shared objects.
• If the binary fails, maybe Windows Lix runs in Wine.

We could also try to build older versions of Lix that use older dependencies and thus don't rely on new D features. E.g., especially the dependency Optional >= 0.6 requires nearly cutting-edge D. But it would be a guessing game and reintroduce old bugs (which might break the build in other ways). I'd recommend the bullet points above first.

That Fedora is really old, there is no need to support it. I will try to build it on Fedora 29 with ldc-1.11.0.

Yes, that's worth a try. LDC 1.11 is based on DMD 2.081.2 and should work; I know that LDC based on DMD 2.082 works.

There's a small chance that LDC based on DMD 2.081.2 is still too old because Optional relies on cutting-edge D. In that case, you could try to build Lix commit d667af7 instead of master; then, Lix depends on Optional 0.4 instead of 0.6.

I was able to build it from master on Fedora 29 with:

$ ldc2 --version
LDC - the LLVM D compiler (1.11.0):
  based on DMD v2.081.2 and LLVM 6.0.1
  built with LDC - the LLVM D compiler (1.11.0)
  Default target: x86_64-unknown-linux-gnu
  Host CPU: haswell
  http://dlang.org - http://wiki.dlang.org/LDC

One more note for the Fedora users. It was required to install (in addition to allegro5-devel) also allegro5-addon-{acodec,image,audio,ttf}-devel.

Thanks for you help.

Thanks for the good report! Seems like Fedora packages the addons separately. I'll add your findings to the build notes.

I have: LDC - the LLVM D compiler (1.12.0):
based on DMD v2.082.1 and LLVM 6.0.1
built with LDC - the LLVM D compiler (1.12.0)
get the same error

That compiler is even newer than szpak's, thus it's strange that you still get an error for static foreach.

Can you post the full build log?

Idea: dub prefers DMD over LDC or LDC2. Do you get a line à la Performing "release" build using ldc2 for x86_64. ? You can force compilation with LDC2 via dub <otherSwitches> --compiler=ldc2.