set uname to linux

package/zlib/Makefile

@@ -40,6 +40,7 @@ endif
 
 do-configure:
 	(cd $(WRKBUILD); $(COPTS) \
+		uname="Linux" \
 		CFLAGS="$(TARGET_CFLAGS) -fPIC" \
 		CPPFLAGS="-I$(STAGING_DIR)/usr/include" \
 		LDFLAGS="-L$(STAGING_DIR)/usr/lib" \