libxml: fix compilation without large file support

package/libxml2/libxml2.mk

@@ -11,6 +11,10 @@ LIBXML2_AUTORECONF = NO
 LIBXML2_INSTALL_STAGING = YES
 LIBXML2_INSTALL_TARGET = YES
 
+ifneq ($(BR2_LARGEFILE),y)
+LIBXML2_CONF_ENV = CC="$(TARGET_CC) $(TARGET_CFLAGS) -DNO_LARGEFILE_SOURCE"
+endif
+
 LIBXML2_CONF_OPT = --target=$(GNU_TARGET_NAME) --host=$(GNU_TARGET_NAME) \
 		--build=$(GNU_HOST_NAME) --prefix=/usr \
 		--exec-prefix=/usr --bindir=/usr/bin \