[LEDE-DEV] [PATCH] tools/cmake: Fix building with openssl libs in non-default location

[Felix Fietkau]

On 2016-09-19 17:49, Alexey Brodkin wrote:
> So with help of our IT guys I was able to get both libssl and libcrypto of the same version in /usr/local/lib
> but now another problem hits me. CMake determines openssl version reading opensslv.h file where ever it is found.
> 
> In my case there're no headers in "/usr/local" tree instead there's one in "/usr/include/openssl" which is a part
> of openssl 1.0.1x installation that exist in "/usr/lib64" folder.
> 
> So in absence of libssl.pc in "staging_dir/host/lib/pkgconfig/" it is a real nightmare to get
> cmake configured and built with multiple openssl versions installed on the host.
> 
> In that light I'm wondering why don't we build openssl for host?
> What's even more interesting why OpenSSL building for host was once introduced in
> https://git.lede-project.org/?p=source.git;a=commit;h=c8ad508d37297400364ee276733de90d29e94778
> and almost immediately after was reverted by
> https://git.lede-project.org/?p=source.git;a=commit;h=82c182f828b3741c494d9014cedb9d0edd9af94e
> ?
I guess it did not work properly back then. We do have tools/libressl
now, but it is only used on Darwin at the moment.
Maybe we should enable it unconditionally and add proper dependencies
instead of introducing more search path hacks.

- Felix