Passing LDFLAGS to Apache modules for hardened build flags

[Moritz Muehlenhoff <jmm@debian.org>]

Hi,
I'm working on hardened build flags for Squeeze and I'm looking into
how to pass hardened build flags to Apache modules. 

According to the apxs2 manpage the following should work:

APACHE_CFLAGS = `dpkg-buildflags --get CFLAGS`
APACHE_CFLAGS += `dpkg-buildflags --get CPPFLAGS`
APACHE_LDFLAGS = `dpkg-buildflags --get LDFLAGS`

(..)

apxs2 -S CFLAGS="$(APACHE_CFLAGS)" -S LDFLAGS_SHLIB="$(APACHE_LDFLAGS)" (..)

The CFLAGS stuff is handled correctly. However for LDFLAGS, this
results in the following error:

apxs:Error: no config variable LDFLAGS_SHLIB
Usage: apxs -g [-S <var>=<val>] -n <modname>
       apxs -q [-S <var>=<val>] <query> ...
       apxs -c [-S <var>=<val>] [-o <dsofile>] [-D <name>[=<value>]]
               [-I <incdir>] [-L <libdir>] [-l <libname>] [-Wc,<flags>]
               [-Wl,<flags>] [-p] <files> ...
       apxs -i [-S <var>=<val>] [-a] [-A] [-n <modname>] <dsofile> ...
       apxs -e [-S <var>=<val>] [-a] [-A] [-n <modname>] <dsofile> ...
make: *** [install] Fehler 1

Any idea, what might be wrong here?

Cheers,
        Moritz