Make $(prefix)/lib before trying to copy the lib into it.
case $enableval in
yes|shared)
PHP_EMBED_TYPE=shared
- INSTALL_IT="\$(INSTALL) -m 0755 $SAPI_SHARED \$(INSTALL_ROOT)/lib"
+ INSTALL_IT="\$(mkinstalldirs) \$(prefix)/lib; \$(INSTALL) -m 0755 $SAPI_SHARED \$(prefix)/lib"
;;
static)
PHP_EMBED_TYPE=static
- INSTALL_IT="\$(INSTALL) -m 0755 $SAPI_STATIC \$(INSTALL_ROOT)/lib"
+ INSTALL_IT="\$(mkinstalldirs) \$(prefix)/lib; \$(INSTALL) -m 0644 $SAPI_STATIC \$(prefix)/lib"
;;
*)
PHP_EMBED_TYPE=no