tests: Verify there are no duplicate symbols exported

tests/Makefile.am

@@ -8,7 +8,8 @@ dist_noinst_SCRIPTS = common.sh \
                       test-pkcs11-tool-allowed-mechanisms.sh
 
 TESTS = \
-	test-manpage.sh \
+        test-manpage.sh \
+        test-duplicate-symbols.sh \
         test-pkcs11-tool-sign-verify.sh \
         test-pkcs11-tool-test.sh \
         test-pkcs11-tool-allowed-mechanisms.sh

tests/test-duplicate-symbols.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+SOURCE_PATH=../
+
+EXPORTS=`find "${SOURCE_PATH}" -name "*exports"`
+
+ERRORS=0
+for E in $EXPORTS; do
+	NUM_DUPES=`sort $E | uniq -D | wc -l`
+	if [[ "$NUM_DUPES" != 0 ]]; then
+		echo "There are duplicate symbols in '$E'"
+		ERRORS=1
+	fi
+done
+
+if [[ "$ERRORS" = 1 ]]; then
+	echo "There are duplicate symbols"
+	exit 1
+fi
+
+exit $ERRORS