[lldb-dev] Unable to build lldb 3.5

[Zachary Turner]

If I have this correct, you want LLDB to be able to debug software compiled
with clang 3.5.  You don't care what version LLDB is built against, it just
has to be able to debug clang 3.5 executables.

If this is the case, you will need to create a separate repository for
building clang and lldb.  The repository you build LLDB against should have
LLVM, clang, and LLDB all at trunk.  You can still build clang against 3.5
in your separate repository.

The issue here seems to be that an API change was made in LLVM 3.5 which
LLDB at trunk won't build against.

On Mon Dec 15 2014 at 11:29:09 AM Enrico Granata <egranata at apple.com> wrote:

> To be honest, things have been compiling just fine around here for a
> while, but I work on OS X with clang, so your luck may vary.
>
> Do you have a trunk LLVM as well?
> As for bugs, LLVM has a bugzilla you could use.
>
> On Dec 15, 2014, at 10:40 AM, Richard Hadsell <hadsell at blueskystudios.com>
> wrote:
>
>  I misunderstood what my sys admin told me.  He was building lldb from the
> trunk, when g++ 4.8.3 gave that error.  Has there been a fix for it in the
> last few days?  How do I report a bug like this?
>
> On 12/12/2014 07:58 PM, Richard Hadsell wrote:
>
> Thanks.  I'll recommend that to my guy.  We didn't realize that lldb
> wasn't vetted the way clang is for an llvm release.
>
> On 12/12/2014 05:26 PM, Enrico Granata wrote:
>
> Have you tried checking out LLDB trunk?
> As far as I know, for LLDB specifically, the LLVM versioning does not mark
> any specific stable release point - following trunk (or at least something
> reasonably close to trunk) is usually a good bet though - at least, if that
> is broken, somebody will chime in and fix it!
>
>  On Dec 12, 2014, at 2:21 PM, Richard Hadsell <hadsell at blueskystudios.com>
> wrote:
>
> Our sys admin has been unsuccessful building lldb 3.5 on CentOS 6.5.  We
> are trying to install it for the first time, because we are compiling
> software with clang 3.5, and TotalView does not yet support the weird debug
> info produced by clang.  We hope that lldb will do better.
>
> He was unable to build lldb 3.5 with clang 3.5, so he is using gcc 4.8.3,
> which we are using as the gcc-toolchain for clang builds.  It dies with
> this error:
>
> llvm[2]: Compiling SBDebugger.cpp for Release+Asserts build
> /usr/local/src/llvm-3.5.0.src/tools/lldb/source/API/SBDebugger.cpp: In
> function ‘llvm::sys::DynamicLibrary LoadPlugin(const DebuggerSP&, const
> lldb_private::FileSpec&, lldb_private::Error&)’:
> /usr/local/src/llvm-3.5.0.src/tools/lldb/source/API/SBDebugger.cpp:87:137:
> warning: ISO C++ forbids casting between pointer-to-function and
> pointer-to-object [-Wpedantic]
>         LLDBCommandPluginInit init_func = (LLDBCommandPluginInit)dynlib.
> getAddressOfSymbol("_ZN4lldb16PluginInitializeENS_10SBDebuggerE");
> ^
> In file included from /usr/local/src/llvm-3.5.0.src/tools/lldb/source/API/
> SBDebugger.cpp:47:0:
> /usr/local/src/llvm-3.5.0.src/include/llvm/Support/DynamicLibrary.h:46:14:
> error: ‘llvm::sys::DynamicLibrary::DynamicLibrary(void*)’ is private
>     explicit DynamicLibrary(void *data = &Invalid) : Data(data) {}
>              ^
> /usr/local/src/llvm-3.5.0.src/tools/lldb/source/API/SBDebugger.cpp:107:38:
> error: within this context
>     return llvm::sys::DynamicLibrary();
>                                      ^
>
> How can we download, build, and install a version of lldb that will debug
> our clang-3.5-built software on CentOS 6.5?
>
>
>    Thanks,
> *- Enrico*
> 📩 egranata@.com ☎️ 27683
>
>
> --
> Dick Hadsell			203-992-6320  Fax: 203-992-6001
> Reply-to:			hadsell at blueskystudios.com
> Blue Sky Studios                http://www.blueskystudios.com
> 1 American Lane, Greenwich, CT 06831-2560
>
>
> Thanks,
> *- Enrico*
> 📩 egranata@.com ☎️ 27683
>
>
>
>
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