[llvm] Export empty vt_gen target (for standalone builds) (PR #109817)

[Evan Wilde via llvm-commits]

https://github.com/etcwilde updated https://github.com/llvm/llvm-project/pull/109817

>From af97bd22fd75eb84f27b0106ae7a7080dd06669b Mon Sep 17 00:00:00 2001
From: Evan Wilde <etceterawilde at gmail.com>
Date: Tue, 24 Sep 2024 08:18:51 -0700
Subject: [PATCH] Export empty vt_gen target

Fixing the standalone builds by exporting the vt_gen target so that the
sources of the clangCodeGen target can form an explicit dependency edge
on it.
---
 llvm/cmake/modules/CMakeLists.txt      | 3 +++
 llvm/cmake/modules/LLVMConfig.cmake.in | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/llvm/cmake/modules/CMakeLists.txt b/llvm/cmake/modules/CMakeLists.txt
index d99af79aa38e0e..ef4cfa3acdb596 100644
--- a/llvm/cmake/modules/CMakeLists.txt
+++ b/llvm/cmake/modules/CMakeLists.txt
@@ -36,6 +36,9 @@ endif()
 if(omp_gen IN_LIST LLVM_COMMON_DEPENDS)
   list(REMOVE_ITEM LLVM_COMMON_DEPENDS omp_gen)
 endif()
+if(vt_gen IN_LIST LLVM_COMMON_DEPENDS)
+  list(REMOVE_ITEM LLVM_COMMON_DEPENDS vt_gen)
+endif()
 
 #
 # Generate LLVMConfig.cmake for the build tree.
diff --git a/llvm/cmake/modules/LLVMConfig.cmake.in b/llvm/cmake/modules/LLVMConfig.cmake.in
index 7e1501a89354c8..c49f10b9343ff8 100644
--- a/llvm/cmake/modules/LLVMConfig.cmake.in
+++ b/llvm/cmake/modules/LLVMConfig.cmake.in
@@ -151,6 +151,9 @@ endif()
 if(NOT TARGET intrinsics_gen)
   add_custom_target(intrinsics_gen)
 endif()
+if(NOT TARGET vt_gen)
+  add_custom_target(vt_gen)
+endif()
 if(NOT TARGET omp_gen)
   add_custom_target(omp_gen)
 endif()