Building C++ extensions

Ok, so I've built an extension that uses a C++ library. It compiles fine but the build system is insisting on linking with gcc no matter what I tell it. Is there some simple trick I'm missing as far as convincing it to use g++ goes? Here is the config.m4 in case I've missed something in there... PHP_ARG_ENABLE(mmsr, whether to enable mmsr support,

[  --enable-mmsr=dir       Enable mmsr support])

if test "$PHP_MMSR" != "no"; then PHP_ADD_LIBRARY_WITH_PATH(mmsr, "$PHP_MMSR") PHP_ADD_INCLUDE("$PHP_MMSR/MMSR") PHP_NEW_EXTENSION(mmsr, mmsr.c "$PHP_MMSR/MMSR/mmsr_bridge.cpp", $ext_shared) PHP_REQUIRE_CXX() fi I had expected the PHP_REQUIRE_CXX() macro to trigger a change to the link command, but it does not seem to have done anything beyond influencing what is used to compile the extension itself. -Stut