better example.

testdupsym/compile.sh

 gcc -shared -o libl1.so lib1.c 
 gcc -shared -o libl2.so lib2.c
-gcc -o main main.c -L. -ll1 -ll2
+gcc -o main main.c -L. -ll2 -ll1
 

testdupsym/lib1.c

@@ -3,3 +3,7 @@ int testfun(int x)
     return x+1;
 }
 
+int abc(int x)
+{
+    return x+11;
+}

testdupsym/lib2.c

@@ -3,3 +3,7 @@ int testfun(int x)
     return x+2;
 }
 
+int def(int x)
+{
+    return x+22;
+}

testdupsym/main.c

 #include <stdio.h>
 
 int testfun(int);
+int abc(int);
+int def(int);
 
 int main(void)
 {
     printf("%d\n", testfun(42));
+    printf("%d\n", abc(42));
+    printf("%d\n", def(42));
     return 0;
 }