third_party/rules_ruby_allow_empty.patch

diff --git a/ruby/private/bundle/create_bundle_build_file.rb b/ruby/private/bundle/create_bundle_build_file.rb
index b283b40..10dce4e 100755
--- a/ruby/private/bundle/create_bundle_build_file.rb
+++ b/ruby/private/bundle/create_bundle_build_file.rb
@@ -38,6 +38,7 @@ GEM_TEMPLATE = <<~GEM_TEMPLATE
         {gem_binaries}
       ],
       exclude = {exclude},
+      allow_empty = True,
     ),
     deps = {deps},
     includes = ["lib/ruby/{ruby_version}/gems/{name}-{version}/lib"],
@@ -47,7 +48,7 @@ GEM_TEMPLATE
 ALL_GEMS = <<~ALL_GEMS
   ruby_library(
     name = "gems",
-    srcs = glob([{bundle_lib_files}]) + glob(["bin/*"]),
+    srcs = glob([{bundle_lib_files}], allow_empty = True) + glob(["bin/*"]),
     includes = {bundle_lib_paths},
   )
 
diff --git a/ruby/private/toolchains/BUILD.runtime.tpl b/ruby/private/toolchains/BUILD.runtime.tpl
index fbb3e64..18fb412 100644
--- a/ruby/private/toolchains/BUILD.runtime.tpl
+++ b/ruby/private/toolchains/BUILD.runtime.tpl
@@ -24,14 +24,20 @@ sh_binary(
 
 cc_import(
     name = "libruby",
-    hdrs = glob({hdrs}),
+    hdrs = glob(
+        include = {hdrs},
+        allow_empty = True,
+    ),
     shared_library = {shared_library},
     static_library = {static_library},
 )
 
 cc_library(
     name = "headers",
-    hdrs = glob({hdrs}),
+    hdrs = glob(
+        include = {hdrs},
+        allow_empty = True,
+    ),
     includes = {includes},
 )