get extensiondir

[xantares 09]

Hello,

I'd want to get extensiondir value from %guile-build-info dictionnary:

print %guile-build-info

$1 = ((buildstamp . "2012-02-28 05:38:10") (CFLAGS . " -pthread") (LIBS . "-Wl,-Bsymbolic-functions -Wl,-z,relro -lcrypt -lm ") (libguileinterface . "26:0:4") (guileversion . "2.0.5-deb+1-1") (extensiondir . "/usr/lib/guile/2.0/extensions") (pkgincludedir . "/usr/include/guile") (pkglibdir . "/usr/lib/guile") (pkgdatadir . "/usr/share/guile") (includedir . "/usr/include") (mandir . "/usr/share/man") (infodir . "/usr/share/info") (ccachedir . "/usr/lib/guile/2.0/ccache") (libdir . "/usr/lib") (localstatedir . "/usr/var") (sharedstatedir . "/usr/com") (sysconfdir . "/usr/etc") (datadir . "/usr/share") (libexecdir . "/usr/libexec") (sbindir . "/usr/sbin") (bindir . "/usr/bin") (exec_prefix . "/usr") (prefix . "/usr") (top_srcdir . "/build/buildd/guile-2.0-2.0.5+1") (srcdir . "/build/buildd/guile-2.0-2.0.5+1/libguile"))

How do I do that ?