1 files changed, 29 insertions, 0 deletions
diff --git a/clang/test/Modules/cstd.m b/clang/test/Modules/cstd.m
new file mode 100644
index 0000000..1752cd3
--- /dev/null
+++ b/clang/test/Modules/cstd.m
@@ -0,0 +1,29 @@
+// RUN: rm -rf %t
+// RUN: %clang -fsyntax-only -isystem %S/Inputs/System/usr/include -fmodules -fmodule-cache-path %t -D__need_wint_t -Werror=implicit-function-declaration %s
+
+// Supplied by compiler, but referenced from the "/usr/include" module map.
+@__experimental_modules_import cstd.float_constants;
+
+float getFltMax() { return FLT_MAX; }
+
+// Supplied by the "/usr/include" module map.
+@__experimental_modules_import cstd.stdio;
+
+void test_fprintf(FILE *file) {
+  fprintf(file, "Hello, modules\n");
+}
+
+// Supplied by compiler, which forwards to the the "/usr/include" version.
+@__experimental_modules_import cstd.stdint;
+
+my_awesome_nonstandard_integer_type value;
+
+// Supplied by the compiler; that version wins.
+@__experimental_modules_import cstd.stdbool;
+
+#ifndef bool
+#  error "bool was not defined!"
+#endif
+
+
+