[PATCH] D93987: [ASTMatchers] Fix build when no targets are enabled

[Stephen Kelly via Phabricator via llvm-commits]

steveire created this revision.
steveire added a reviewer: aaron.ballman.
Herald added a subscriber: mgorny.
steveire requested review of this revision.
Herald added a project: LLVM.
Herald added a subscriber: llvm-commits.

This makes sense to do when building only tools like clang-tidy for
example.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D93987

Files:
  llvm/cmake/modules/LLVM-Config.cmake


Index: llvm/cmake/modules/LLVM-Config.cmake
===================================================================
--- llvm/cmake/modules/LLVM-Config.cmake
+++ llvm/cmake/modules/LLVM-Config.cmake
@@ -28,7 +28,9 @@
     string(TOUPPER "${LLVM_TARGETS_TO_BUILD}" targets)
   elseif(ARG_OMITTED_TARGETS)
     set(omitted_targets ${LLVM_ALL_TARGETS})
-    list(REMOVE_ITEM omitted_targets ${LLVM_TARGETS_TO_BUILD})
+    if (LLVM_TARGETS_TO_BUILD)
+      list(REMOVE_ITEM omitted_targets ${LLVM_TARGETS_TO_BUILD})
+    endif()
     string(TOUPPER "${omitted_targets}" targets)
   else()
     string(TOUPPER "${LLVM_ALL_TARGETS}" targets)


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