[LLVMbugs] [Bug 11642] New: -fvisibility-inlines-hidden should not hide explicit instantiations

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=11642

             Bug #: 11642
           Summary: -fvisibility-inlines-hidden should not hide explicit
                    instantiations
           Product: clang
           Version: trunk
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: LLVM Codegen
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: benny.kra at gmail.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified


Created attachment 7798
  --> http://llvm.org/bugs/attachment.cgi?id=7798
preprocessed testcase for a.cc

Clang with -fvisibility-inlines-hidden generates a hidden definition for
explicitly instantiated inlines.

Now think of the following scenario:
a.h defines class Foo.
a.cc has the instantiation for Foo<int>
b.cc uses Foo<int>

Now we build a shared library from a.cc, Foo::foo is not exported. When b.cc is
compiled it won't include a definition for Foo::foo and linking against the
shared library will cause a linker error.

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