[Bug 271821] devel/llvm16: broken CMake suport in -lite flavor

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=271821

            Bug ID: 271821
           Summary: devel/llvm16: broken CMake suport in -lite flavor
           Product: Ports & Packages
           Version: Latest
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: Individual Port(s)
          Assignee: brooks@FreeBSD.org
          Reporter: jbeich@FreeBSD.org
             Flags: maintainer-feedback?(brooks@FreeBSD.org)
          Assignee: brooks@FreeBSD.org

I'd like to use llvm16-lite in RPCS3 CI but CMake references a backend only
exposed in shared library. find_package(LLVM 16.0) is enough to reproduce.

Found via https://cirrus-ci.com/task/6573386822844416
For easier testing use the port:

$ make clean all -C emulators/rpcs3
[...]
CMake Error at /usr/local/llvm16/lib/cmake/llvm/LLVMExports.cmake:996
(message):
  The imported target "LLVMDemangle" references the file

     "/usr/local/llvm16/lib/libLLVMDemangle.a"

  but this file does not exist.  Possible reasons include:

  * The file was deleted, renamed, or moved to another location.

  * An install or uninstall procedure did not complete successfully.

  * The installation package was faulty and contained

     "/usr/local/llvm16/lib/cmake/llvm/LLVMExports.cmake"

  but not all the files it references.

Call Stack (most recent call first):
  /usr/local/llvm16/lib/cmake/llvm/LLVMConfig.cmake:252 (include)
  3rdparty/llvm.cmake:54 (find_package)
  3rdparty/CMakeLists.txt:331 (include)

with the following patch

diff --git a/Mk/Uses/llvm.mk b/Mk/Uses/llvm.mk
index 931ad99156f8..2f7cc26a30a1 100644
--- a/Mk/Uses/llvm.mk
+++ b/Mk/Uses/llvm.mk
@@ -96,7 +96,11 @@ _LLVM_MK_SUFFIX_${_ver}?=    ${_ver}
 .  endfor

 # === define variables to depend on and export ===
+.if ${_LLVM_MK_VERSION} >= 15
+_LLVM_MK_PORT=         devel/llvm${_LLVM_MK_SUFFIX_${_LLVM_MK_VERSION}}@lite
+.else
 _LLVM_MK_PORT=         devel/llvm${_LLVM_MK_SUFFIX_${_LLVM_MK_VERSION}}
+.endif
 _LLVM_MK_LIBLLVM=      libLLVM-${_LLVM_MK_VERSION}.so
 _LLVM_MK_PATH=         llvm-config${_LLVM_MK_SUFFIX_${_LLVM_MK_VERSION}}
 _LLVM_MK_PREFIX=       ${PREFIX}/llvm${_LLVM_MK_SUFFIX_${_LLVM_MK_VERSION}}

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