no symlinks on windows

recipe/meta.yaml

@@ -16,9 +16,10 @@ source:
     # backport of zlib patches, can be dropped for v>15.0.3, see
     # https://reviews.llvm.org/D135457 & https://reviews.llvm.org/D136065
     - patches/0002-CMake-Fix-Findzstd-module-for-shared-DLL-on-Windows.patch
+    - patches/no-windows-symlinks.patch
 
 build:
-  number: 0
+  number: 1
   merge_build_host: false
 
 requirements:
@@ -65,8 +66,11 @@ outputs:
         - test -f $PREFIX/include/llvm/Pass.h                           # [not win]
         - test -f $PREFIX/lib/libLLVMCore.a                             # [not win]
         - $PREFIX/libexec/llvm/not false                                # [not win]
+        - $PREFIX/bin/llvm-nm --help                                    # [not win]
         - if not exist %LIBRARY_INC%\\llvm\\Pass.h exit 1               # [win]
         - if not exist "%LIBRARY_PREFIX%"\\libexec\llvm\not.exe exit 1  # [win]
+        - if not exist "%LIBRARY_BIN%"\\llvm-nm.exe exit 1              # [win]
+        - llvm-nm.exe --help                                            # [win]
 
   # Contains the shared libraries. To make different LLVM libraries co-installable
   # soversion is appended to the package name.

recipe/patches/no-windows-symlinks.patch

@@ -0,0 +1,27 @@
+commit ca5eab8b706d4307b954f39254efdfa6cad47cb5
+Author: Isuru Fernando <idf2@illinois.edu>
+Date:   Tue Nov 8 13:34:20 2022 -0600
+
+    Always copy on windows
+
+    The conda package build machine may have permissions to
+    create symlinks, but conda doesn't handle symlinks on windows
+    properly
+
+diff --git a/llvm/cmake/modules/LLVMInstallSymlink.cmake b/llvm/cmake/modules/LLVMInstallSymlink.cmake
+index e9be04aceb3d..1ff77f28385a 100644
+--- a/llvm/cmake/modules/LLVMInstallSymlink.cmake
++++ b/llvm/cmake/modules/LLVMInstallSymlink.cmake
+@@ -13,10 +13,11 @@ function(install_symlink name target outdir)
+
+   message(STATUS "Creating ${name}")
+
++  if(NOT CMAKE_HOST_WIN32)
+   execute_process(
+     COMMAND "${CMAKE_COMMAND}" -E create_symlink "${target}" "${name}"
+     WORKING_DIRECTORY "${outdir}" ERROR_VARIABLE has_err)
+-  if(CMAKE_HOST_WIN32 AND has_err)
++  else()
+     execute_process(
+       COMMAND "${CMAKE_COMMAND}" -E copy "${target}" "${name}"
+       WORKING_DIRECTORY "${outdir}")