Slackware :: Regex In Blacklist For Slackpkg - How To Use

Today I moved my Slackware64-current installations to multilib. I blacklisted the gcc and glib packages in the blacklist-file for slackpkg. In the blacklistfile they say:

Code:
# Now we can blacklist using regular expressions.
# This one will blacklist all SBo packages:
#[0-9]+_SBo
I have blacklisted

Code:
...
# The gcc compiler suite:
gcc
gcc-g++
gcc-gfortran
gcc-gnat
gcc-java
gcc-objc

# The GNU libc libraries:
glibc
glibc-i18n
glibc-profile
glibc-solibs
glibc-zoneinfo
glibc-debug
...

How I can use the mentioned regular expressions in order to make blacklisting more efficient?