HTTPD won't start with latest sasl
 

Unless I did something wrong, but with latest sasl version I see this:

# ls -l /usr/lib64/libsasl2.so*
... /usr/lib64/libsasl2.so -> libsasl2.so.3.0.0*
... /usr/lib64/libsasl2.so.3 -> libsasl2.so.3.0.0*

But HTTPD is still looking for /usr/lib64/libsasl2.so.2 which I created by linking it to libsasl2.so.3.0.0 (dirty like surrounder said).

# slackpkg search sasl

Looking for sasl in package list. Please wait... DONE

The list below shows all packages with name matching "sasl".

[ installed ] - qca-cyrus-sasl-2.0.0_beta3-x86_64-2
[ installed ] - cyrus-sasl-2.1.26-x86_64-1

you probably have to update your httpd too: here

And yet...

installed version is httpd-2.4.17-x86_64-2

$ objdump -x /usr/sbin/httpd | grep NEEDED | grep sasl
NEEDED libsasl2.so.3

and

# ldd /usr/sbin/httpd
linux-vdso.so.1 (0x00007ffe4bdb8000)
libpcre.so.1 => /lib64/libpcre.so.1 (0x00007f34a30b8000)
libaprutil-1.so.0 => /usr/lib64/libaprutil-1.so.0 (0x00007f34a2e8e000)
libexpat.so.1 => /usr/lib64/libexpat.so.1 (0x00007f34a2c64000)
libsqlite3.so.0 => /usr/lib64/libsqlite3.so.0 (0x00007f34a2996000)
libicui18n.so.56 => /usr/lib64/libicui18n.so.56 (0x00007f34a2509000)
libicuuc.so.56 => /usr/lib64/libicuuc.so.56 (0x00007f34a2171000)
libicudata.so.56 => /usr/lib64/libicudata.so.56 (0x00007f34a078e000)
libdb-4.4.so => /lib64/libdb-4.4.so (0x00007f34a047f000)
libldap-2.4.so.2 => /usr/lib64/libldap-2.4.so.2 (0x00007f34a0236000)
libsasl2.so.3 => /usr/lib64/libsasl2.so.3 (0x00007f34a001a000)
libssl.so.1 => /lib64/libssl.so.1 (0x00007f349fda1000)
libcrypto.so.1 => /lib64/libcrypto.so.1 (0x00007f349f952000)
liblber-2.4.so.2 => /usr/lib64/liblber-2.4.so.2 (0x00007f349f744000)
libresolv.so.2 => /lib64/libresolv.so.2 (0x00007f349f529000)
libapr-1.so.0 => /usr/lib64/libapr-1.so.0 (0x00007f349f2f5000)
libuuid.so.1 => /lib64/libuuid.so.1 (0x00007f349f0f1000)
librt.so.1 => /lib64/librt.so.1 (0x00007f349eee9000)
libcrypt.so.1 => /lib64/libcrypt.so.1 (0x00007f349ecb0000)
libpthread.so.0 => /lib64/libpthread.so.0 (0x00007f349ea92000)
libdl.so.2 => /lib64/libdl.so.2 (0x00007f349e88e000)
libc.so.6 => /lib64/libc.so.6 (0x00007f349e4c1000)
libm.so.6 => /lib64/libm.so.6 (0x00007f349e1c0000)
libstdc++.so.6 => /usr/lib64/libstdc++.so.6 (0x00007f349de45000)
libgcc_s.so.1 => /usr/lib64/libgcc_s.so.1 (0x00007f349dc2f000)
/lib64/ld-linux-x86-64.so.2 (0x0000555b2685a000)

but
# /etc/rc.d/rc.httpd start
/usr/sbin/httpd: error while loading shared libraries: libsasl2.so.2: cannot open shared object file: No such file or directory

you probably have other stuff in your system still linking to the old libsasl2.
if you want to find what is you can check it using objdump: run it like this
then repeat this with every library you got in output from the first step and so on until you get what links to the old version of libsasl2.

Thanks for the tip:
for lib in $(objdump -x /usr/sbin/httpd | grep NEEDED | awk '{print $NF}'); do echo "Now checking $lib:"; objdump -x $(locate $lib); done > file
and indeed looking into file I see that libldap-2.4.so.2 is looking for the problematic file, which is a part of aaa_elflibs or
openldap-client which is not installed on my machine. Installing the later fixed this issue, thanks a lot.