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-rw-r--r--gcc-4.9/gcc/testsuite/gcc.dg/cpp/undef-opt-1.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/testsuite/gcc.dg/cpp/undef-opt-1.c b/gcc-4.9/gcc/testsuite/gcc.dg/cpp/undef-opt-1.c
new file mode 100644
index 000000000..99c524662
--- /dev/null
+++ b/gcc-4.9/gcc/testsuite/gcc.dg/cpp/undef-opt-1.c
@@ -0,0 +1,8 @@
+/* Test -undef. A bug in its handling broke glibc builds because
+ "linux" was wrongly defined. */
+/* { dg-do preprocess } */
+/* { dg-options "-undef" } */
+
+#ifdef linux
+#error -undef broken
+#endif