[LLVMbugs] [Bug 13658] New: Bad diagnostic for #pragma visibility collision with attribute.

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=13658

             Bug #: 13658
           Summary: Bad diagnostic for #pragma visibility collision with
                    attribute.
           Product: clang
           Version: unspecified
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: C++
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: benny.kra at gmail.com
                CC: dgregor at apple.com, llvmbugs at cs.uiuc.edu
    Classification: Unclassified


for

#pragma GCC visibility push(hidden)
class basic_string;
class __attribute__((__visibility__("default"))) basic_string;

clang emits:

t.cpp:4:22: error: visibility does not match previous declaration
class __attribute__((__visibility__("default"))) basic_string;
                     ^
t.cpp:1:13: note: previous attribute is here
#pragma GCC visibility push(hidden)


#pragma is not an attribute and it would be really helpful if we had a note
pointing at the forward declaration.

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