symbols file: To hide or not to hide...

[Mathieu Malaterre <malat@debian.org>]

Hi,

  So I finally managed to get my C++ symbols file generated. However
before shooting myself in the foot, I'd like to know if I need to
generate the symbol file using -fvisibility=hidden or not ? The output
of pkgkde-gensymbols/pkgkde-symbolshelper[1] seems to be drastically
affected by having/not having this compiler flag.
  I could not find any explanation in §8.6

Here is my d/rules when using hidden flag:

#!/usr/bin/make -f
[...]
export DEB_CFLAGS_MAINT_APPEND=-fvisibility=hidden
export DEB_CXXFLAGS_MAINT_APPEND=-fvisibility=hidden


Thanks !
-M
[1] http://www.eyrie.org/~eagle/journal/2012-01/008.html