[lldb][dotest] Add #include <algorithm> to libc++ detection

rupprecht · rupprecht · commit 786b6db8e6fd · 2019-12-11T14:06:14.000-08:00
Summary: Speculative fix after 34ef51b broke the lldb buildbot on libc++ tests. Reviewers: echristo, EricWF Subscribers: ldionne, lldb-commits Tags: #lldb Differential Revision: https://reviews.llvm.org/D71376
diff --git a/lldb/packages/Python/lldbsuite/test/dotest.py b/lldb/packages/Python/lldbsuite/test/dotest.py
@@ -856,7 +856,7 @@ def canRunLibcxxTests():
         with tempfile.NamedTemporaryFile() as f:
             cmd = [configuration.compiler, "-xc++", "-stdlib=libc++", "-o", f.name, "-"]
             p = subprocess.Popen(cmd, stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE, universal_newlines=True)
-            _, stderr = p.communicate("int main() {}")
+            _, stderr = p.communicate("#include <algorithm>\nint main() {}")
             if not p.returncode:
                 return True, "Compiling with -stdlib=libc++ works"
             return False, "Compiling with -stdlib=libc++ fails with the error: %s" % stderr
