Update compiler extension integration into the build system
The approach here is to create a new (empty) component, `Extensions', where all
statically compiled extensions dynamically register their dependencies. That way
we're more natively compatible with LLVMBuild and llvm-config.
Fixes: https://bugs.llvm.org/show_bug.cgi?id=44870
Differential Revision: https://reviews.llvm.org/D78192
diff --git a/llvm/lib/Extensions/CMakeLists.txt b/llvm/lib/Extensions/CMakeLists.txt
new file mode 100644
index 0000000..701e9c4
--- /dev/null
+++ b/llvm/lib/Extensions/CMakeLists.txt
@@ -0,0 +1,3 @@
+add_llvm_component_library(LLVMExtensions
+ Extensions.cpp
+)