[PATCH] D150966: [clang] Don't define predefined macros multiple times

[Sergei Barannikov via Phabricator via cfe-commits]

barannikov88 added a comment.

Q: What is it the -Wsystem-header can warn about? I mean, no system header is included by the test, what can go wrong?



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Comment at: clang/test/Preprocessor/predefined-macros-no-warnings.c:2
+// Check that the predefined macros don't contain anything that causes a warning with -Wsystem-headers
+// RUN: %clang_cc1 %s -E -o - -Wsystem-headers -Werror -triple arc
+// RUN: %clang_cc1 %s -E -o - -Wsystem-headers -Werror -triple xcore
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https://reviews.llvm.org/D150966