Don't spawn subprocess if codegen spec uses flags but not the prelude #14904
+13
−4
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The
run
spec helper always spawns a subprocess if any compile-time flags are specified. In practice, the only specs using theflags
parameter are the ones for-Dstrict_multi_assign
and the obsolete ones for-Dpreview_overload
in #7206, which all separately require the prelude anyway. (There is one outlier that is addressed in #14903.) This PR allows specs specifyingflags
but not requiring the prelude to use LLVM's JIT.