[lldb-dev] cmake question and [PATCH] for Undefined symbol "_liblldb_coreVersionString"

[Zachary Turner via lldb-dev]

If I remember correctly the CMake stuff relating to LLDB_vers.c is kind of
confusing.  I can have a look when I'm back in the office on Monday if
nobody else beats me.

On Fri, Sep 25, 2015 at 10:29 AM via lldb-dev <lldb-dev at lists.llvm.org>
wrote:

> Due to recent changes, rebuilding with cmake and ninja in an existing
> build on
> OSX gets the following linker errors (note: it builds fine from scratch):
>
>     $ ninja
>     . . .
>     Undefined symbols for architecture x86_64:
>     "_liblldb_coreVersionString", referenced from:
>         lldb_private::GetVersion() in lldb.cpp.o
>     ld: symbol(s) not found for architecture x86_64
>     clang: error: linker command failed with exit code 1 (use -v to see
> invocation)
>     . . .
>     ninja: build stopped: subcommand failed.
>
>
> I've tried to fix this wirth the attached patch, but it gets a warning
> about
> multiple rules for LLDB_vers.c:
>
>     $ ninja
>     [1/1] Re-running CMake...
>     . . .
>     ninja: warning: multiple rules generate tools/lldb/source/LLDB_vers.c.
> builds involving this target will not be correct; continuing anyway
>     . . .
>     [13/13] Creating executable symlink bin/lldb
>
> Does anyone know how to fix this the right way to avoid these warnings?
>
>
> BTW, anyone know why I also get the following warnings?  (They are
> unrelated to
> the linker error or the patch, but just curious):
>
>     . . .
>     [6/13] Linking CXX shared library lib/liblldb.3.8.0.dylib
>     ld: warning: cannot export hidden symbol lldb::SBListener::GetSP()
> from tools/lldb/source/API/CMakeFiles/liblldb.dir/SBAttachInfo.cpp.o
>     ld: warning: cannot export hidden symbol lldb::SBListener::GetSP()
> from tools/lldb/source/API/CMakeFiles/liblldb.dir/SBLaunchInfo.cpp.o
>     . . .
>     ld: warning: cannot export hidden symbol
> lldb::endian::InlHostByteOrder() from
> lib/liblldbExpression.a(IRForTarget.cpp.o)
>     [13/13] Creating executable symlink bin/lldb
>
> Thanks in advance,
> -Dawn
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