xerces: only add -liconv when locale are disabled

The iconv library can only be present when locale are disabled in the
toolchain. When locale are enabled in the toolchain, iconv is directly
implemented by the C library.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/xerces/xerces.mk

@@ -39,6 +39,10 @@ XERCES_APPS:= \
 
 XERCES_INCLUDES:=/usr/include/xercesc
 
+ifneq ($(BR2_ENABLE_LOCALE),y)
+XERCES_MAKE_OPT=LIBS="-liconv"
+endif
+
 $(DL_DIR)/$(XERCES_SOURCE):
 	 $(call DOWNLOAD,$(XERCES_SITE),$(XERCES_SOURCE))
 
@@ -74,7 +78,7 @@ $(XERCES_DIR)/.configured: $(XERCES_DIR)/.unpacked
 	touch $@
 
 $(XERCES_DIR)/src/.libs/$(LIBXERCES_BINARY): $(XERCES_DIR)/.configured
-	$(MAKE) $(TARGET_CONFIGURE_OPTS) LIBS="-liconv" -C $(XERCES_DIR)
+	$(MAKE) $(TARGET_CONFIGURE_OPTS) $(XERCES_MAKE_OPT) -C $(XERCES_DIR)
 
 $(STAGING_DIR)/usr/lib/$(LIBXERCES_BINARY): $(XERCES_DIR)/src/.libs/$(LIBXERCES_BINARY)
 	$(MAKE) $(TARGET_CONFIGURE_OPTS) DESTDIR=$(STAGING_DIR) \