LOGCXX-424: liblog4cxx.pc.in should reflect dependency on apr-1, apr-1-util
LOGCXX-424: liblog4cxx.pc.in should reflect dependency on apr-1, apr-1-util

Changing from Requires to Requires.private on reflection and re-reading
the pkg-config materials.  In particular, the discussion of overlinking.

Currently produces, on my system, the following:

# Compilation brings in APR installation at include time
$ pkg-config --cflags ./liblog4cxx.pc
-DLINUX=2 -D_REENTRANT -D_GNU_SOURCE -pthread -I/h2/rhys/Stow/log4cxx-0.10.1/include -I/usr/include/apr-1

# Dynamic linking brings in only a dynamic library, avoiding overlinking
$ pkg-config --libs ./liblog4cxx.pc
-L/h2/rhys/Stow/log4cxx-0.10.1/lib -llog4cxx

# Static linking brings in APR and all its dependencies at link time
$ pkg-config --libs --static ./liblog4cxx.pc
-L/h2/rhys/Stow/log4cxx-0.10.1/lib -llog4cxx -laprutil-1 -lldap -llber -lexpat -ldb-4.7 -lapr-1 -lpthread



git-svn-id: 8cac002d40702dd3daf332427dac850c287e9308@1562826 13f79535-47bb-0310-9956-ffa450edef68

antoine1fr/log4cxx,antoine1fr/log4cxx,antoine1fr/log4cxx,antoine1fr/log4cxx