1 files changed, 7 insertions, 0 deletions
diff --git a/clang/test/Sema/format-string-percentm.c b/clang/test/Sema/format-string-percentm.c
new file mode 100644
index 0000000..1ffc439
--- /dev/null
+++ b/clang/test/Sema/format-string-percentm.c
@@ -0,0 +1,7 @@
+// RUN: %clang_cc1 -fsyntax-only -verify %s -triple i686-pc-linux-gnu
+
+// PR 4142 - support glibc extension to printf: '%m' (which prints strerror(errno)).
+int printf(char const*,...);
+void percentm(void) {
+  printf("%m");
+}