All targets (at least on sanitizer builds) unconditionally depend on //build/config/sanitizers:deps (which is a no-op on non-sanitizer builds).
It is necessary for bug 593874 that all targets now also depend on //buildtools/third_party/libc++:libcxx_proxy. This suggests a new "global dependency" should be added. Something like //build/config:exe_and_shlib_deps
Comment 1 by bugdroid1@chromium.org
, May 18 2017