``import std`` doesn't work on windows

[ClausKlein]

No SOURCES given to target: __CMAKE__CXX26 on ubuntu 25.04

Whoever packaged the compiler. If the packagers need support for their use case from the compiler, ex, they need to be able to tell the compiler “I’m going to put these files here” to make -print-file-name work, then it is on the packagers to communicate that the various compiler upstreams. The compiler upstreams can decide on a case-by-case basis if they want to support the packagers conventions, or if it is on the packagers to align themselves with the compiler’s expectations. CMake’s invol…