In 3.1.1 c-m branch there is a (transient) bug in GPLUSPLUS_INCLUDE_DIR caused by this patch to libstdc++
2002-06-27 Benjamin Kosnik <[EMAIL PROTECTED]> * configure.in (INTERFACE): Remove. (release_VERSION): Remove. * acinclude.m4 (GLIBCPP_EXPORT_INSTALL_INFO): Change include placement. (libstdcxx_interface): Change. Use gcc methods to determine version. * configure: Regenerate. * aclocal.m4: Regenerate. which results in a non-existent g++ path (at least for me). It is fixed now by this: http://gcc.gnu.org/ml/gcc-patches/2002-06/msg02253.html Danny http://www.sold.com.au - SOLD.com.au - Find yourself a bargain!