Getting error in dmd testsuite

[Joakim via Digitalmars-d-learn]

On Saturday, 26 August 2017 at 21:59:10 UTC, Thomas Mader wrote:
> Hello,
>
> I am building ldc on Nix (https://nixos.org/nix/) but keep 
> getting an error while running the cppa.d test from the dmd 
> testsuite (https://github.com/ldc-developers/dmd-testsuite).
>
> 1588:  ... runnable/cppa.d                 -L-lstdc++ (-g) -O
> 1588: Test failed.  The logged output:
> 1588: /tmp/nix-build-ldc-1.3.0.drv-0/build/bin/ldmd2 -conf= 
> -m64 -Irunnable  -L-lstdc++  
> -od/tmp/nix-build-ldc-1.3.0.drv-0/build/dmd-testsuite/runnable 
> -of/tmp/nix-build-ldc-1.3.0.drv-0/build/dmd-testsuite/runnable/cppa_0 runnable/cppa.d /tmp/nix-build-ldc-1.3.0.drv-0/build/dmd-testsuite/runnable/cppb.cpp.o
> 1588: 
> /tmp/nix-build-ldc-1.3.0.drv-0/build/dmd-testsuite/runnable/cppa_0.o: In function `_Dmain':
> 1588: runnable/cppa.d:(.text._Dmain[_Dmain]+0x49f): undefined 
> reference to `int foo15372<int>(int)'
> 1588: runnable/cppa.d:(.text._Dmain[_Dmain]+0x4b2): undefined 
> reference to `Foo15802<int>::boo(int)'
> 1588: 
> /tmp/nix-build-ldc-1.3.0.drv-0/build/dmd-testsuite/runnable/cppa_0.o:(.data.rel.ro._D4cppa6C131616__vtblZ[_D4cppa6C131616__vtblZ]+0x0): undefined reference to `C13161::dummyfunc()'
> 1588: 
> /tmp/nix-build-ldc-1.3.0.drv-0/build/dmd-testsuite/runnable/cppa_0.o:(.data.rel.ro._D4cppa4Test6__vtblZ[_D4cppa4Test6__vtblZ]+0x0): undefined reference to `C13161::dummyfunc()'
> 1588: 
> /tmp/nix-build-ldc-1.3.0.drv-0/build/dmd-testsuite/runnable/cppa_0.o:(.data.rel.ro._D4cppa7C13161a6__vtblZ[_D4cppa7C13161a6__vtblZ]+0x0): undefined reference to `C13161a::dummyfunc()'
> 1588: 
> /tmp/nix-build-ldc-1.3.0.drv-0/build/dmd-testsuite/runnable/cppa_0.o:(.data.rel.ro._D4cppa5Testa6__vtblZ[_D4cppa5Testa6__vtblZ]+0x0): undefined reference to `C13161a::dummyfunc()'
> 1588: collect2: error: ld returned 1 exit status
> 1588: Error: 
> /nix/store/df84hkmhrhx1c2zpvrhmk6aprhlzkasx-gcc-wrapper-6.4.0/bin/gcc failed with status: 1
> 1588:
> 1588:
> 1588: ==============================
> 1588: Test failed: expected rc == 0, exited with rc == 1
> 1588:
> 1588: make[2]: *** [Makefile:335: 
> /tmp/nix-build-ldc-1.3.0.drv-0/build/dmd-testsuite/runnable/cppa.d.out] Error 1
>
> Apart from that all other tests pass.
> Any ideas?
>
> It's running on Linux with gcc 6.4.0.

That module tests linking with C++ files, looks like you have 
some symbols that don't match up.  That's weird, because those 
normally work with gcc.  For each of them, use the readelf 
command from binutils to compare the symbols generated and see 
how they differ.  For example,

readelf -sW 
/tmp/nix-build-ldc-1.3.0.drv-0/build/dmd-testsuite/runnable/cppb.cpp.o |grep foo15372

Then run the same command on the D side, ie for cppa_0.o, and 
compare the symbols.

File a bug on the ldc github if you can't figure it out:

https://github.com/ldc-developers/ldc/issues