We used to have a flag to enable module maps, and two more flags to enable
implicit module maps. This is all redundant; we don't need any flag for
enabling module maps in the abstract, and we don't usually have -fno- flags for
-cc1. We now have just a single flag, -fimplicit-module-maps, that enables
implicitly searching the file system for module map files and loading them.
The driver interface is unchanged for now. We should probably rename
-fmodule-maps to -fimplicit-module-maps at some point.
llvm-svn: 239789
with a subset of the existing target CPU features or mismatched CPU
names.
While we can't check that the CPU name used to build the module will end
up being able to codegen correctly for the translation unit, we actually
check that the imported features are a subset of the existing features.
While here, rewrite the code to use std::set_difference and have it
diagnose all of the differences found.
Test case added which walks the set relationships and ensures we
diagnose all the right cases and accept the others.
No functional change for implicit modules here, just better diagnostics.
llvm-svn: 232248
Adrian Prantl