================
@@ -4417,7 +4417,8 @@ void Driver::BuildActions(Compilation &C, DerivedArgList
&Args,
// Use the -mcpu=? flag as the dummy input to cc1.
Actions.clear();
- Action *InputAc = C.MakeAction<InputAction>(*A, types::TY_C);
+ Action *InputAc = C.MakeAction<InputAction>(
+ *A, IsFlangMode() ? types::TY_Fortran : types::TY_C);
----------------
tarunprabhu wrote:
This is actually needed.
The `-mcpu=help` argument is used as a "dummy input" (there is a comment a few
lines above that says as much).
The input action created here eventually gets used in `ShouldUseFlangCompiler`
which checks if the input type is accepted by `flang`. `flang` does not accept
inputs of type `TY_C` (even if they are "dummies"). If `ShouldUseFlangCompiler`
returns `false`, a `cc1` command line is created - which is, obviously, not
correct.
https://github.com/llvm/llvm-project/pull/117199
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