Description Thierry Thomas 2017-10-22 16:27:52 UTC

Created attachment 187371 [details]
Using pkg-config to detect openssl.pc

When built in a clean environment (e.g. poudriere, like on the packages cluster), libevent is linked against libcrypto provided by the base system:

ldd /usr/local/lib/libevent-2.1.so.6
/usr/local/lib/libevent-2.1.so.6:
        libcrypto.so.8 => /lib/libcrypto.so.8 (0x801400000)
        libthr.so.3 => /lib/libthr.so.3 (0x801869000)
        libc.so.7 => /lib/libc.so.7 (0x800825000)

When you link it from another port, you get this warning:

/usr/bin/ld: warning: libcrypto.so.8, needed by /usr/local/lib/libevent-2.1.so.6, may conflict with libcrypto.so.9

and actually this might cause hard to debug problems.

Just adding pkg-config to detect openssl.pc solves the problem.
(Warning: the problem exists if the package has been built in poudriere, but when built from a port on a machine where pkg-config is installed, configure is smart enough to detect it)

After this fix:
ldd /usr/local/lib/libevent_openssl-2.1.so.6
/usr/local/lib/libevent_openssl-2.1.so.6:
        libssl.so.9 => /usr/local/lib/libssl.so.9 (0x801206000)
        libcrypto.so.9 => /usr/local/lib/libcrypto.so.9 (0x801600000)
        libthr.so.3 => /lib/libthr.so.3 (0x801a75000)
        libc.so.7 => /lib/libc.so.7 (0x800825000)