"spl" module is OK if compiling into PHP, but not as external module

Hello, I've built Php5 with "--with-spl" correctly. There are no errors that I see. Now, I'm trying to build & install module "spl.so" separately from Php. As is usual, I execute php-src/etc/spl phpize ./configure make install But, now 'make' display the error, ... config.status: config.h is unchanged Installing shared extensions: /usr/local/lib/php/extensions/no-debug-zts-20060613/ cp: target `/usr/local/lib/php/extensions/no-debug-zts-20060613/#INST@1466#' is not a directory make: *** [install-modules] Error 1 Exploring in 'Makefile', I see the install-modules: build-modules @test -d modules && \ $(mkinstalldirs) $(INSTALL_ROOT)$(EXTENSION_DIR) @echo "Installing shared extensions: $(INSTALL_ROOT)$(EXTENSION_DIR)/" @rm -f modules/*.la >/dev/null 2>&1 @$(INSTALL) modules/* $(INSTALL_ROOT)$(EXTENSION_DIR) And, build-modules: $(PHP_MODULES) libphp$(PHP_MAJOR_VERSION).la: $(PHP_GLOBAL_OBJS) $(PHP_SAPI_OBJS) $(LIBTOOL) --mode=link $(CC) $(CFLAGS) $(EXTRA_CFLAGS) -rpath $(phptempdir) $(EXTRA_LDFLAGS) $(LDFLAGS) $(PHP_RPATHS) $(PHP_GLOBAL_OBJS) $(PHP_SAPI_OBJS) $(EXTRA_LIBS) $(ZEND_EXTRA_LIBS) -o $@ -@$(LIBTOOL) --silent --mode=install cp $@ $(phptempdir)/$@ >/dev/null 2>&1 Where, I think, the problem is with, --mode=install cp $@ $(phptempdir)/$@ in the last line I've included. I'm not certain why this is OK when building "--with-spl" into Php, but not standing alone. Can someone, perhaps, see & explain the problem? Thanks. John