WillAyd commented on code in PR #45596:
URL: https://github.com/apache/arrow/pull/45596#discussion_r1964262214


##########
cpp/src/arrow/meson.build:
##########
@@ -289,6 +373,49 @@ install_headers(
     install_dir: 'arrow',
 )
 
+if needs_tests
+    filesystem_dep = dependency('boost', modules: ['filesystem'])
+    gtest_main_dep = dependency('gtest_main')
+    gmock_dep = dependency('gmock')
+else
+    filesystem_dep = disabler()
+    gtest_main_dep = disabler()
+    gmock_dep = disabler()
+endif
+
+arrow_test_lib = static_library(

Review Comment:
   The static_library is required here because the Meson wrap dependency for 
gtest only provides consumers with the source files, and when using that in two 
different shared libraries then linking together you get an ODR violation.
   
   See also https://github.com/mesonbuild/wrapdb/issues/1937



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