Compiling C++ FMU runtime and FMUs with -D_GLIBCXX_USE_CXX11_ABI=0 does not work on Windows

[Adrian Pop]

We get linker errors if we compiled the C++ FMU runtime and FMU code with
-D_GLIBCXX_USE_CXX11_ABI=0
​https://test.openmodelica.org/hudson/job/OM_Win/lastCompletedBuild/testReport/openmodelica_cppruntime_fmu_modelExchange_1/0/Crane_FMU1_CPP_mos/

If we remove the flag compilation of FMUs works fine.
The problem is that this is used for cross-compilation of Windows on Linux so the question is how could we disable this flag only on msys2 mingw on Windows and not in Linux. Looks like a configure problem.

[Rüdiger Franke]

It was me who tweaked the ABI recently. I wanted to wait for the new Windows version being available and then fix FMU compilation and packaging under Windows at once. The available nightly still dates back to June 2:

​https://build.openmodelica.org/omc/builds/windows/nightly-builds/32bit/

Shall I fix it upfront and hoping it would work?

[Rüdiger Franke]

Have a look at 0a6dd266cc0d5e80548e9fa7702d55f92e55af69/OMCompiler. I had only tested gcc4.9 with static full runtime and cross compiled runtime -- which worked because gcc4.9 uses the old ABI anyway. My gcc5.3 test only covered a cross compiled runtime which also uses the old ABI -- under Windows we seem to have a static full runtime with new ABI.

[Volker Waurich]

That fixes the issue. Thank you for the quick response.

[Adrian Pop]

I can also confirm this as fixed, the models no longer fail in the windows testing.