Commit Graph

2 Commits

Author SHA1 Message Date
Brad King
ea0294c281 Flang: Implement MSVC runtime library abstraction
In commit fb3370b6a1 (MSVC: Add abstraction for runtime library
selection, 2019-04-10, v3.15.0-rc1~229^2) we overlooked updating flags
for Flang on Windows.  Add them now and update the MSVCRuntimeLibrary
Fortran test to work with Flang.  Base the flags on those we already
use for the GNU-like Clang targeting the MSVC ABI.

Fixes: #19583
2019-08-09 10:18:54 -04:00
Brad King
fb3370b6a1 MSVC: Add abstraction for runtime library selection
Replace our hard-coded defaults for `/MD` and `/MDd` with a first-class
abstraction to select the runtime library from an enumeration of logical
names.  We've long hesitated to do this because the idea of "runtime
library selection" touches on related concepts on several platforms.
Avoid that scope creep by simply defining an abstraction that applies
only when targeting the MSVC ABI on Windows.

Removing the old default flags requires a policy because existing
projects may rely on string processing to edit them and choose a runtime
library under the old behavior.  Add policy CMP0091 to provide
compatibility.

Fixes: #19108
2019-04-17 11:00:44 -04:00