[LLVMbugs] [Bug 19817] New: libc++ has no minor or patch version, and no version symbols

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=19817

            Bug ID: 19817
           Summary: libc++ has no minor or patch version, and no version
                    symbols
           Product: libc++
           Version: unspecified
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: All Bugs
          Assignee: unassignedclangbugs at nondot.org
          Reporter: richardg.work at gmail.com
                CC: llvmbugs at cs.uiuc.edu, mclow.lists at gmail.com
    Classification: Unclassified

The libc++.so.1 library symlink points to libc++.so.1.0 for both llvm 3.3 and
3.4. However, these libraries contain different symbols. For example, I can see
std::__1::shared_mutex::lock is present in the llvm 3.4 libc++.so. This may
cause a problem for distributing binaries built on llvm 3.4 to a machine with
llvm 3.3 installed.

Correct me if I'm wrong, but I believe the libc++.so library should distinguish
these ambiguous libraries using patch versions, ie. create libc++.so.1.0.1, and
include version symbols similar to GLIBCXX_* symbols in the libstdc++.so
library.

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