https://bugs.llvm.org/show_bug.cgi?id=51837
Bug ID: 51837
Summary: inconsistent handling of #pragma message
Product: clang
Version: trunk
Hardware: PC
OS: Windows NT
Status: NEW
Severity: normal
Priority: P
Component: Frontend
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected],
[email protected]
// Given a simple source like
#pragma message("foobar")
we get a warning when compiled with no extra options, -Werror, or
-W#pragma-messages:
> clang -c test2.cpp
test2.cpp:1:9: warning: foobar [-W#pragma-messages]
#pragma message("foobar")
^
1 warning generated.
> clang -c -Werror test2.cpp
test2.cpp:1:9: warning: foobar [-W#pragma-messages]
#pragma message("foobar")
^
1 warning generated.
> clang -c -W#pragma-messages test2.cpp
test2.cpp:1:9: warning: foobar [-W#pragma-messages]
#pragma message("foobar")
^
1 warning generated.
However, when compiled with both -Werror and -W#pragma-messages we get an
error:
> clang -c -Werror -W#pragma-messages test2.cpp
test2.cpp:1:9: error: foobar [-Werror,-W#pragma-messages]
#pragma message("foobar")
^
1 error generated.
The reason seems to be that the "NoWarningAsError" flag (which is present in
the descriptor for the pragma messages warning) is dropped during warning
options processing (probably in DiagnosticsEngine::setSeverity()) or
thereabouts.
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