$(INSTALL) -d $(INSTALL_DIR)/$(LIB_DIR)
$(INSTALL) -m 644 $(TOP)/include/GL/*.h $(INSTALL_DIR)/include/GL
@if [ -e $(TOP)/$(LIB_DIR)/$(GL_LIB_NAME) ]; then \
$(INSTALL) -d $(INSTALL_DIR)/$(LIB_DIR)
$(INSTALL) -m 644 $(TOP)/include/GL/*.h $(INSTALL_DIR)/include/GL
@if [ -e $(TOP)/$(LIB_DIR)/$(GL_LIB_NAME) ]; then \