https://llvm.org/bugs/show_bug.cgi?id=25546
Bug ID: 25546
Summary: Bad diagnostic when using -Wunused-macros and building
.S files
Product: clang
Version: 3.7
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: -New Bugs
Assignee: unassignedclangb...@nondot.org
Reporter: eyal.lo...@gmail.com
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
If you build even the empty.S file:
echo > /tmp/empty.S
clang -Wunused-macros -c /tmp/empty.S
You get a bad "unused macro" diagnostics on all the built-in macros:
<built-in>:1:9: warning: macro is not used [-Wunused-macros]
#define __llvm__ 1
^
<built-in>:2:9: warning: macro is not used [-Wunused-macros]
#define __clang__ 1
^
...
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