Re: an experiment using mbed TLS

I wrote:
> I wrote:
> > Nick wrote:
> > > OK, what do I need to do to build this after an hour of head scratching:
> > > 
> > > checking mbedtls/ssl.h usability... no
> > > checking mbedtls/ssl.h presence... yes
> > > configure: WARNING: mbedtls/ssl.h: present but cannot be compiled
> > > configure: WARNING: mbedtls/ssl.h:     check for missing prerequisite
> > > headers? configure: WARNING: mbedtls/ssl.h: see the Autoconf
> > > documentation configure: WARNING: mbedtls/ssl.h:     section "Present
> > > But Cannot Be Compiled" configure: WARNING: mbedtls/ssl.h: proceeding
> > > with the compiler's result checking for mbedtls/ssl.h... no
> > > configure: WARNING: *** mbed TLS 2 not found. Disabling SSL/HTTPS/TLS
> > > support. ***
> > 
> > IIRC, Jeremy was the closest we had to an autoconf expert, but he hasn't
> > been around.
> > 
> > Is anything interesting in the mbedtls region of the config.log file?
> > 
> > I don't remember ever seeing quite that sort of set of warnings out
> > of autoconf before.
> 
> I was able to reproduce the problem by uninstalling mbed tls and then
> pointing to it during configuration with CPPFLAGS to the include dir
> and LDFLAGS to the lib dir.
> 
> Making the attached changes makes it succeed, although I've only
> gotten just that far at the moment and haven't looked into whether
> it's an error on their part or what...

Their bug: https://github.com/ARMmbed/mbedtls/issues/522