Some NaCl system headers live in a special directory and the toolchain doesn't propagate the -I compiler flag [2]. A common workaround in Chromium is to use 'public_deps' in order to propagate //native_client_sdk/src/libraries/nacl_io:nacl_io_include_dirs one step further in the build graph. [1] - https://cs.chromium.org/chromium/src/native_client_sdk/src/libraries/nacl_io/ [2] - -Inative_client_sdk/src/libraries/third_party/newlib-extras Bug: chromium:925028 Change-Id: I5145b80c2ae6969f79fcbfcf93a6b05c8a122746 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/129701 Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org> Reviewed-by: Nico Weber <thakis@chromium.org> Reviewed-by: Niels Moller <nisse@webrtc.org> Reviewed-by: Karl Wiberg <kwiberg@webrtc.org> Cr-Commit-Position: refs/heads/master@{#27373}