On Tue, Feb 5, 2019 at 12:36 AM Khem Raj <raj.k...@gmail.com> wrote:
>
> 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
>
> Signed-off-by: Khem Raj <raj.k...@gmail.com>

Something about this is breaking a local recipe (for tlsdate fwiw, but
I don't think that's relevant):

| checking openssl/ssl.h usability... no
| checking openssl/ssl.h presence... yes
| configure: WARNING: openssl/ssl.h: present but cannot be compiled
| configure: WARNING: openssl/ssl.h:     check for missing prerequisite headers?
| configure: WARNING: openssl/ssl.h: see the Autoconf documentation
| configure: WARNING: openssl/ssl.h:     section "Present But Cannot
Be Compiled"
| configure: WARNING: openssl/ssl.h: proceeding with the compiler's result
| configure: WARNING:     ## ------------------------------------- ##
| configure: WARNING:     ## Report this to jacob at appelbaum.net ##
| configure: WARNING:     ## ------------------------------------- ##
| checking for openssl/ssl.h... no
| configure: error: OpenSSL is not installed, openssl/sslh is missing

Somehow it's not getting the definition for THIRTY_TWO_BIT from
openssl/opensslconf.h (from openssl10) when testing for openssl/ssl.h
so BN_ULONG ends up undefined... still digging as to what's going on.

-- 
Alex Kiernan
-- 
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