From ff570c3705e02a80c46435d5127222a2a380ab7e Mon Sep 17 00:00:00 2001
From: Andreas Herrmann <andreas.herrmann@tweag.io>
Date: Tue, 24 Nov 2020 10:34:55 +0100
Subject: [PATCH] Test C and C++ compilation explicitly

---
 tests/BUILD.bazel | 5 +++++
 tests/c-test.c    | 7 +++++++
 tests/cc-test.cc  | 6 +++++-
 3 files changed, 17 insertions(+), 1 deletion(-)
 create mode 100644 tests/c-test.c

diff --git a/tests/BUILD.bazel b/tests/BUILD.bazel
index 077c0c845..6c80584fd 100644
--- a/tests/BUILD.bazel
+++ b/tests/BUILD.bazel
@@ -82,6 +82,11 @@ cc_binary(
     srcs = ["cc-test.cc"],
 )
 
+cc_binary(
+    name = "c-test",
+    srcs = ["c-test.c"],
+)
+
 # Test that nixpkgs_cc_configure is selected.
 cc_toolchain_test(
     name = "cc-toolchain",
diff --git a/tests/c-test.c b/tests/c-test.c
new file mode 100644
index 000000000..304d0d872
--- /dev/null
+++ b/tests/c-test.c
@@ -0,0 +1,7 @@
+#include "stdio.h"
+int main() {
+        puts("Hello world\n");
+        // Ensure that this is compiled as C, template is a keyword in C++.
+        int template = 0;
+        return template;
+}
diff --git a/tests/cc-test.cc b/tests/cc-test.cc
index 76e819701..0e7f60bbd 100644
--- a/tests/cc-test.cc
+++ b/tests/cc-test.cc
@@ -1 +1,5 @@
-int main() { return 0; }
+#include <iostream>
+int main() {
+        std::cout << "Hello world\n";
+        return 0;
+}