[flang-commits] [clang] [flang] [flang][driver] Introduce FCC_OVERRIDE_OPTIONS. (PR #140556)

[Kiran Chandramohan via flang-commits]

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@@ -0,0 +1,12 @@
+! RUN: env FCC_OVERRIDE_OPTIONS="#+-Os +-Oz +-O +-O3 +-Oignore +a +b +c xb Xa Omagic ^-###  " %flang -target x86_64-unknown-linux-gnu %s -O2 b -O3 2>&1 | FileCheck %s
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kiranchandramohan wrote:

Does `+`, `x`,`X` have special meanings? Is that documented anywhere?

I think we should document `FCC_OVERRIDE_OPTIONS`.  One possible location is https://github.com/llvm/llvm-project/blob/main/flang/docs/FlangDriver.md

https://github.com/llvm/llvm-project/pull/140556