[PATCH] D94422: [flang][driver] Unify f18_version.h.in and Version.inc.in

[Andrzej Warzynski via Phabricator via llvm-commits]

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Flang has two CMake configurable header files that define compiler
version numbers:

- f18_version.h.in - only used in f18.cpp (uses version numbers from LLVM's macro definitions)
- Version.inc.in - not currently used (uses version numbers hard-coded in Flang's top CMake script)

Currently only f18_version.h.in provides version numbers consistent with
other subprojects in llvm-project. However, its location and name is
inconsistent with other subprojects (e.g. Clang). This patch merges the
two headers together:

- hard-coded version numbers in Flang's top CMake script are deleted
- Version.inc.in is updated to provide string versions of version numbers (required by f18.cpp)
- f18_version.h.in is deleted as it's no longer needed


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D94422

Files:
  flang/CMakeLists.txt
  flang/include/flang/Version.inc.in
  flang/tools/f18/CMakeLists.txt
  flang/tools/f18/f18.cpp
  flang/tools/f18/f18_version.h.in

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