GCC 8.0.0 status on x86_64-w64-mingw32, some issues

[Rainer Emrich]

Here's a short status report for trunk on x86_64-w64-mingw32 host.

I know this is only a secondary platform, but there are some serius issues.

Especially the ada part is in a bad shape compared to 7.3.0, see
https://gcc.gnu.org/ml/gcc-testresults/2018-02/msg00439.html
and
https://gcc.gnu.org/ml/gcc-testresults/2018-02/msg00308.html

At least 20 of the acats tests catch all memory until the host memory is exhausted.
Same holds for the two libstdc++ tests
23_containers/unordered_set/requirements/exception/basic.cc
and
23_containers/unordered_set/requirements/exception/propagation_consistent.cc

For gcc 8.0.0 I had to disable lto due to the recent changes.

A second headsup, bintuils 2.30 breaks bootstraping for x86_64-w64-mingw32.
I get ICEs for the stage 2 compiler when configuring libgcc in stage 2, see
https://gcc.gnu.org/ml/gcc/2018-02/msg00034.html

Rainer


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