llvm dev - Jul 2018 - Building clang and llvm

Hello all
I'm new to clang and llvm. Yesterday I built the newest version of clang
and llvm (version 7.0). But today I came to know clang uses -libstdc++ as a
default c++ standard library. Unfortunately, my gcc is 5.4.0, so clang
still points to the old libstdc++ which doesn't support some features of
c++17. Is there any way to build clang and llvm based on already
pre-installed clang,llvm and make it use libc++ by default?
There was one solution I came across the internet but it suggests me to
update the gcc to the newest version, so that clang can use the newest
version of libstdc++ and I can make use of c++17 features. But I don't want
to update gcc. I would like to have a solution with clang and llvm. Any
answers or suggestions are highly appreciated.
Thanks
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://lists.llvm.org/pipermail/llvm-dev/attachments/20180729/fef038de/attachment.html>

Hi Praveen,

When configuring your LLVM & Clang build you can set the CMAKE_CXX_COMPILER
and CMAKE_C_COMPILER options on your CMake command line. To use libc++, you can
set LLVM_ENABLE_LIBCXX=On during configuration time.

If you haven’t already, I suggest you look over the documentation of LLVM’s
build system here:
http://www.llvm.org/docs/CMake.html <http://www.llvm.org/docs/CMake.html>

It lists many commonly used options and gives a basic explanation of how to use
CMake.

-Chris
> On Jul 29, 2018, at 8:08 AM, Praveen Velliengiri via llvm-dev <llvm-dev
at lists.llvm.org> wrote:
> 
> Hello all
> I'm new to clang and llvm. Yesterday I built the newest version of
clang and llvm (version 7.0). But today I came to know clang uses -libstdc++ as
a default c++ standard library. Unfortunately, my gcc is 5.4.0, so clang still
points to the old libstdc++ which doesn't support some features of c++17. Is
there any way to build clang and llvm based on already pre-installed clang,llvm
and make it use libc++ by default?
> There was one solution I came across the internet but it suggests me to
update the gcc to the newest version, so that clang can use the newest version
of libstdc++ and I can make use of c++17 features. But I don't want to
update gcc. I would like to have a solution with clang and llvm. Any answers or
suggestions are highly appreciated.
> Thanks
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://lists.llvm.org/pipermail/llvm-dev/attachments/20180731/3a0b11ec/attachment.html>