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Antoine Pitrou authored and GitHub committed f522bc625fb
MINOR: [CI][C++] Re-enable optimizations in Valgrind build (#36507) ARROW_CXXFLAGS does not take priority anymore, need to pass optimization flags differently. Authored-by: Antoine Pitrou <antoine@python.org> Signed-off-by: Sutou Kouhei <kou@clear-code.com>