diff --git a/configure/os/CONFIG.linux-x86.linux-x86 b/configure/os/CONFIG.linux-x86.linux-x86
index 32e09429d..13a6cc4fc 100644
--- a/configure/os/CONFIG.linux-x86.linux-x86
+++ b/configure/os/CONFIG.linux-x86.linux-x86
@@ -14,4 +14,6 @@ GNU_DIR = /usr
 CC = $(GNU_BIN)/gcc
 CCC = $(GNU_BIN)/g++
 
-SHRLIB_LDFLAGS +=  -shared -z defs
+SHRLIB_ALLOW_UNDEFINEDS=NO
+SHRLIB_LDFLAGS_NO = -z defs
+SHRLIB_LDFLAGS +=  -shared $(SHRLIB_LDFLAGS_$(SHRLIB_ALLOW_UNDEFINEDS))