Avoid infinite include loops, especially with bits/wordsize.h which is
now possible with the synthesized headers since we now also synthesize
bits/wordsize.h itelf for some arches e.g. arm/aarch64
In cases where extra preprocessing tools are used such as clang-tidy
e.g. and these tools are not passed the knowledge about architecture
then case comes where we enter into header include loop for
bits/wordsize.h, since this template does explicitly include
bits/wordsize.h
To fix this emits the pragma once at beginning of file, this is better
solution than include guards, and pragma once is practically supported
on all compilers except few e.g. cray c/c++ compiler
(From OE-Core rev: 6ab11ac25bb987642d5ca1a07f4bd5f30c66c9c5)
Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
When building with `clang -target bpf` using the
multilib_header, a recursion was unavoidable because
bits/wordsize.h would #include itself, still lacking
a definition for __MHWORDSIZE or __WORDSIZE.
(From OE-Core rev: 70b41b3c335a80b4ac243f468f22331d261299db)
Signed-off-by: Daniel Díaz <daniel.diaz@linaro.org>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Having arm 32/64 bit headers coexisting turns out to be tricky. Unfortunately
our wrapper works using wordsize.h and this differs on arm so we can't use it.
Therefore replicate the logic here for arm. I did look into writing our
own wordsize.h but we also need to remap kernel headers on arm and
since wordsize.h comes from libc, that doesn't work for kernel headers.
(From OE-Core rev: 141dc7136c9c62da1d30132df4b3244fe6d8898d)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This helper function and associated header will allow us to
resolve two/three header files that conflict due to contents
that change based on wordsize and ABI.
(From OE-Core rev: 1fe66d01b7bce70a37245d47b1abce155fae926e)
Signed-off-by: Mark Hatle <mark.hatle@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
