Flatbuffer header files should not have a flatbuffers include prefix

[rweickelt]

The generated flatbuffer header expects the flatbuffer headers to be located in a flatbuffers folder:

#include "flatbuffers/flatbuffers.h"

This is problematic when cross-building for embedded targets using the host installation of flatbuffers. The includes are located under /usr/include/flatbuffers in most Linux distributions. The generated flatbuffer header and also flatbuffers/flatbuffers.h require the compiler include path set to /usr/include which takes precedence over default compiler include paths. Various problems arise, like the compiler finding the wrong standard lib and so on.

There are ways to work around that problem like creating symlinks to /usr/include/flatbuffers somewhere in the project or build directory so that the compiler include path can be set to the folder containing the symlink. But that is neither portable nor maintainable.

I would prefer the flatbuffer headers if the flatbuffer did not require a flatbuffers include prefix at all or at least, if it would be configurable in the generated header.

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