wgtmac commented on code in PR #760:
URL: https://github.com/apache/iceberg-cpp/pull/760#discussion_r3440101305


##########
cmake_modules/IcebergThirdpartyToolchain.cmake:
##########
@@ -421,6 +421,62 @@ function(resolve_croaring_dependency)
       PARENT_SCOPE)
 endfunction()
 
+# ----------------------------------------------------------------------
+# utf8proc
+
+function(resolve_utf8proc_dependency)
+  prepare_fetchcontent()
+
+  if(DEFINED ENV{ICEBERG_UTF8PROC_URL})
+    set(UTF8PROC_URL "$ENV{ICEBERG_UTF8PROC_URL}")
+  else()
+    set(UTF8PROC_URL
+        
"https://github.com/JuliaStrings/utf8proc/archive/refs/tags/v2.10.0.tar.gz";)
+  endif()
+
+  fetchcontent_declare(utf8proc
+                       ${FC_DECLARE_COMMON_OPTIONS}
+                       URL ${UTF8PROC_URL}
+                           FIND_PACKAGE_ARGS
+                           NAMES
+                           utf8proc
+                           CONFIG)
+  fetchcontent_makeavailable(utf8proc)
+
+  if(utf8proc_SOURCE_DIR)
+    if(NOT TARGET utf8proc::utf8proc)
+      add_library(utf8proc::utf8proc INTERFACE IMPORTED)
+      target_link_libraries(utf8proc::utf8proc INTERFACE utf8proc)
+      target_include_directories(utf8proc::utf8proc INTERFACE 
${utf8proc_SOURCE_DIR})
+    endif()
+
+    set(UTF8PROC_VENDORED TRUE)

Review Comment:
   `utf8proc` is licensed under the permissive MIT License (along with some 
Unicode data under a similarly permissive license). We need to update the 
LICENSE File by adding a separator at the bottom similar to this:
   
   ```
   ---
   This product bundles utf8proc, which is available under the MIT License:
   Copyright © 2014-2021 by Steven G. Johnson, Jiahao Chen, Tony Kelman, Jonas 
Fonseca, and other contributors listed in the git history.
   Permission is hereby granted, free of charge, to any person obtaining a copy 
of this software and associated documentation files (the "Software"), to deal 
in the Software without restriction, including without limitation the rights to 
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies 
of the Software... (include the rest of the utf8proc MIT license text here)
   ```



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