$(SED) 's/^CFG_IPV6IFNAME=auto/CFG_IPV6IFNAME=no/' $(QTOPIA4_TARGET_DIR)/configure
 endif
        $(SED) 's/^CFG_XINERAMA=auto/CFG_XINERAMA=no/' $(QTOPIA4_TARGET_DIR)/configure
-       $(SED) 's/-O2/$(TARGET_CFLAGS)/' $(QTOPIA4_TARGET_DIR)/mkspecs/qws/linux-$(BR2_PACKAGE_QTOPIA4_EMB_PLATFORM)-g++/qmake.conf
+       $(SED) 's,-O2,$(TARGET_CFLAGS),' $(QTOPIA4_TARGET_DIR)/mkspecs/qws/linux-$(BR2_PACKAGE_QTOPIA4_EMB_PLATFORM)-g++/qmake.conf
        -[ -f $(QTOPIA4_QCONFIG_FILE) ] && cp $(QTOPIA4_QCONFIG_FILE) \
                $(QTOPIA4_TARGET_DIR)/$(QTOPIA4_QCONFIG_FILE_LOCATION)
        (cd $(QTOPIA4_TARGET_DIR); rm -rf config.cache; \
        $(SED) 's/^CFG_IPV6IFNAME=auto/CFG_IPV6IFNAME=no/' $(QTOPIA4_HOST_DIR)/configure
 endif
        $(SED) 's/^CFG_XINERAMA=auto/CFG_XINERAMA=no/' $(QTOPIA4_HOST_DIR)/configure
-       $(SED) 's/-O2/$(TARGET_CFLAGS)/' $(QTOPIA4_HOST_DIR)/mkspecs/qws/linux-$(BR2_PACKAGE_QTOPIA4_EMB_PLATFORM)-g++/qmake.conf
+       $(SED) 's,-O2,$(TARGET_CFLAGS),' $(QTOPIA4_HOST_DIR)/mkspecs/qws/linux-$(BR2_PACKAGE_QTOPIA4_EMB_PLATFORM)-g++/qmake.conf
        -[ -f $(QTOPIA4_QCONFIG_FILE) ] && cp $(QTOPIA4_QCONFIG_FILE) \
                $(QTOPIA4_HOST_DIR)/$(QTOPIA4_QCONFIG_FILE_LOCATION)
        (cd $(QTOPIA4_HOST_DIR); rm -rf config.cache; \