[lldb-dev] lldb 3.4 rc1 is failing with gcc 4.6

[Sylvestre Ledru]

AFAIK, gcc 4.8 is not part of the repositories of Ubuntu 12.04... So, it
would need to add extra packages to build lldb ... :/


On 24/11/2013 18:04, Todd Fiala wrote:
> FWIW I have the build process we're using over here on Ubuntu 12.04
> building with gcc 4.8.2 since I hit build errors on that path as well.
>  I tried several other paths that each failed for different reasons
> before settling on that one.
>
>
> On Sun, Nov 24, 2013 at 7:22 AM, Colin Riley <colin at codeplay.com
> <mailto:colin at codeplay.com>> wrote:
>
>     We noticed this too, but assumed it was just progress on the
>     uptake of cpp11 features. We would rather not need to upgrade to
>     4.8 either, but understand if this is just the path that is being
>     taken.
>
>     Colin
>     ------------------------------------------------------------------------
>     From: Sylvestre Ledru <mailto:sylvestre at debian.org>
>     Sent: 24/11/2013 11:17
>     To: lldb-dev at cs.uiuc.edu <mailto:lldb-dev at cs.uiuc.edu>
>     Subject: [lldb-dev] lldb 3.4 rc1 is failing with gcc 4.6
>
>     Hello,
>
>     I am working on the port of lldb on the various Debian architectures
>     [1]. On some of them (sparc, s390x, powerpc, ia64, ...),
>     the version of gcc used is 4.6 and lldb fails to build because of this
>     declaration.
>         Mutex *m_mutex = nullptr;
>     in include/lldb/Utility/Iterable.h
>
>     It fails with:
>
>     /«BUILDDIR»/llvm-toolchain-3.4-3.4~+rc1/tools/lldb/source/../include/lldb/Utility/Iterable.h:197:22:
>     sorry, unimplemented: non-static data member initializers
>     /«BUILDDIR»/llvm-toolchain-3.4-3.4~+rc1/tools/lldb/source/../include/lldb/Utility/Iterable.h:197:22:
>     error: 'constexpr' needed for in-class initialization of static
>     data member 'm_mutex' of non-integral type
>     /«BUILDDIR»/llvm-toolchain-3.4-3.4~+rc1/tools/lldb/source/../include/lldb/Utility/Iterable.h:
>     In constructor 'lldb_private::LockingAdaptedIterable<C, E,
>     A>::LockingAdaptedIterable(C&, lldb_private::Mutex&)':
>     /«BUILDDIR»/llvm-toolchain-3.4-3.4~+rc1/tools/lldb/source/../include/lldb/Utility/Iterable.h:201:9:
>     error: class 'lldb_private::LockingAdaptedIterable<C, E, A>' does
>     not have any field named 'm_mutex'
>     /«BUILDDIR»/llvm-toolchain-3.4-3.4~+rc1/tools/lldb/source/../include/lldb/Utility/Iterable.h:203:9:
>     error: 'm_mutex' was not declared in this scope
>     /«BUILDDIR»/llvm-toolchain-3.4-3.4~+rc1/tools/lldb/source/../include/lldb/Utility/Iterable.h:
>     In constructor 'lldb_private::LockingAdaptedIterable<C, E,
>     A>::LockingAdaptedIterable(lldb_private::LockingAdaptedIterable<C,
>     E, A>&&)':
>     /«BUILDDIR»/llvm-toolchain-3.4-3.4~+rc1/tools/lldb/source/../include/lldb/Utility/Iterable.h:208:9:
>     error: class 'lldb_private::LockingAdaptedIterable<C, E, A>' does
>     not have any field named 'm_mutex'
>     /«BUILDDIR»/llvm-toolchain-3.4-3.4~+rc1/tools/lldb/source/../include/lldb/Utility/Iterable.h:
>     In destructor 'lldb_private::LockingAdaptedIterable<C, E,
>     A>::~LockingAdaptedIterable()':
>     /«BUILDDIR»/llvm-toolchain-3.4-3.4~+rc1/tools/lldb/source/../include/lldb/Utility/Iterable.h:215:13:
>     error: 'm_mutex' was not declared in this scope
>
>
>     Is there a workaround to tackle this limitation ? I could switch
>     to gcc
>     4.8 but it would break the backport of lldb on http://llvm.org/apt/
>     (especially on old Ubuntu without gcc 4.8)
>
>     Thanks,
>     Sylvestre
>
>
>
>     [1] https://buildd.debian.org/status/package.php?p=llvm-toolchain-3.4
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