CompileFeatures test fails with gcc 8 (#17740) · Issues · CMake / CMake

CompileFeatures test fails with gcc 8

``` 33: Scanning dependencies of target default_dialect_C 33: [ 13%] Building C object CMakeFiles/default_dialect_C.dir/default_dialect.c.o 33: /builddir/build/BUILD/cmake-3.10.2/Tests/CompileFeatures/default_dialect.c:4:2: error: #error Unexpected value for __STDC_VERSION__. 33: #error Unexpected value for __STDC_VERSION__. 33: ^~~~~ ``` This is happening as part of Fedora 28 development.

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