[flang-commits] [clang] [flang] [flang] Generalize -pedantic to take an optional argument (PR #196410)

[KAWASHIMA Takahiro via flang-commits]

kawashima-fj wrote:

> Do we know if the -std= flag is widely used by applications in the wild?

FYI: My colleagues tried to build many Fortran softwares by [Spack](https://spack.io/) using Flang two years ago. They encountered many `-std=legacy` GFortran options, one `-std=f2003` option, and one `-std=gnu`  option.

https://github.com/llvm/llvm-project/pull/196410