Situation
Last time we compared the distribution binary with the self compiled one and noticed missing libraries. Now we need the packages libbz2-dev and libgnutls28-dev to be installed. To trigger usage of GnuTLS, the configuration needs to be invoked with environment variables set.
cd /tmp/canary/compile/gnupg-2.5.5 LIBGNUTLS_CFLAGS="-I /usr/include/gnutls" LIBGNUTLS_LIBS="-L /usr/lib/x86_64-linux-gnu -l gnutls" ./configure --prefix=/tmp/canary/install make make install
The install procedure is odd. Something is wrong with the doc folder, and some kind of recursion warning is given as output message. But this is not the topic to focus on today...
The Improved Binary
$ LD_LIBRARY_PATH="/tmp/canary/install/lib" ldd /tmp/canary/install/bin/gpg linux-vdso.so.1 (0x00007ffc86d51000) libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (...) libbz2.so.1.0 => /lib/x86_64-linux-gnu/libbz2.so.1.0 (...) libgcrypt.so.20 => /tmp/canary/install/lib/libgcrypt.so.20 (...) libassuan.so.9 => /tmp/canary/install/lib/libassuan.so.9 (...) libnpth.so.0 => /tmp/canary/install/lib/libnpth.so.0 (...) libgpg-error.so.0 => /tmp/canary/install/lib/libgpg-error.so.0 (...) libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (...) /lib64/ld-linux-x86-64.so.2 (...)
The libbz2 support is visible. Support for GnuTLS is not visible. There is a replacement option with ntbTLS. This library is offered by GnuPG upstream, but there is the warning NOT WELL TESTED on the page. It is even unclear whether GnuTLS is expected to appear or not. There are a lot of questioins remaining open for further investigation.
To be continued...