Fix several issues with compiler extensions

- Update documentation now that the move to monorepo has been made
- Do not tie compiler extension testing to LLVM_BUILD_EXAMPLES
- No need to specify LLVM libraries for plugins
- Add NO_MODULE option to match Polly specific requirements (i.e. building the
  module *and* linking it statically)
- Issue a warning when building the compiler extension with
  LLVM_BYE_LINK_INTO_TOOLS=ON, as it modifies the behavior of clang, which only
  makes sense for testing purpose.

Still mark llvm/test/Feature/load_extension.ll as XFAIL because of a
ManagedStatic dependency that's going to be fixed in a seperate commit.

Differential Revision: https://reviews.llvm.org/D72327

1 files changed, 2 insertions, 2 deletions

diff --git a/llvm/test/lit.cfg.py b/llvm/test/lit.cfg.py
index e785b220540..b57b87ad657 100644
--- a/llvm/test/lit.cfg.py
+++ b/llvm/test/lit.cfg.py
@@ -200,13 +200,13 @@ if config.has_plugins:
 if config.build_examples:
     config.available_features.add('examples')
 
-if config.linked_bye_extension and config.build_examples:
+if config.linked_bye_extension:
     config.substitutions.append(('%llvmcheckext', 'CHECK-EXT'))
     config.substitutions.append(('%loadbye', ''))
 else:
     config.substitutions.append(('%llvmcheckext', 'CHECK-NOEXT'))
     config.substitutions.append(('%loadbye',
-                                 '-load={}/libBye{}'.format(config.llvm_shlib_dir,
+                                 '-load={}/Bye{}'.format(config.llvm_shlib_dir,
                                                                   config.llvm_shlib_ext)))
 
 # Static libraries are not built if BUILD_SHARED_LIBS is ON.