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Subject: Re: [Boost-users] How to compile boost with non-standard clang installations.
From: Bill White (bill.white_at_[hidden])
Date: 2014-02-11 13:49:20

Please ignore my message. I think figured it out. The problem went away
when I didn't specify -std=c++11.

Sorry for the spam.

On Mon, Feb 10, 2014 at 6:29 PM, Bill White <bill.white_at_[hidden]> wrote:
> I am trying to build boost using clang. I know there are many sources of
> advice for doing this, but I can't seem to find a description of my exact
> system, and my attempts to adapt them have not been notably successful.
> Here are my configuration constraints:
> 1.) Clang is not the system compiler. It is compiled in installed in
> separately,
> with prefix $a/clang. So, $a/clang/bin/clang++ is the C++
> compiler, and so forth.
> I am using the tip of the llvm/clang tree.
> 2.) I want to use libc++, which is installed in
> $a/clang/lib/ I also want
> to use the libc++ abi, which is installed in $a/clang/lib/
> 3.) The libc++ standard library include files are installed in
> $a/include/c++/v1.
> For most programs I compile with the options
> -nostdinc++ -isystem $a/clang/include/c++/v1 -std=c++11
> and link with
> -stdlib=libc++ -L$a/clang/lib -lcxxabi
> This seems to work pretty well for most circumstances. However, I
> can't figure out
> how to translate this to boost 1.55.0. I tried:
> ./ --with-toolset=clang --prefix=$a/clang
> ./b2 toolset=clang \
> cxxflags="-std=c++11 -nostdinc++ -isystem
> $a/clang/include/c++/v1 -stdlib=libc++" \
> linkflags="-stdlib=c++ -L$a/clang/lib" \
> --prefix=$a/clang -j10 define=BOOST_SYSTEM_NO_DEPRECATED stage release
> However, the compilations failed. They all seemed to fail compiling
> type_traits. A typical
> failure is:
> clang-linux.compile.c++.without-pth
> bin.v2/libs/regex/build/clang-linux-3.0/release/threading-multi/icu.o
> In file included from libs/regex/build/../src/icu.cpp:20:
> In file included from ./boost/regex/config.hpp:43:
> In file included from ./boost/config.hpp:40:
> In file included from ./boost/config/select_stdlib_config.hpp:37:
> In file included from ./boost/config/no_tr1/utility.hpp:21:
> In file included from
> /local/billw/arch/glnxa64/clang/include/c++/v1/utility:157:
> In file included from /local/billw/arch/glnxa64/clang/include/c++/v1/__tuple:16:
> /local/billw/arch/glnxa64/clang/include/c++/v1/type_traits:3308:31:
> error: expected expression
> static const bool value = decltype(__test<_Tp>(nullptr))::value;
> ^
> 1 error generated.
> "clang++" -c -x c++ -std=c++11 -nostdinc++ -isystem
> /local/billw/arch/glnxa64/clang/include/c++/v1 -O3 -finline-functions
> -Wno-inline -Wall -pedantic -pthread -fPIC -std=c++11 -nostdinc++
> -isystem /local/billw/arch/glnxa64/clang/include/c++/v1
> "bin.v2/libs/regex/build/clang-linux-3.0/release/threading-multi/icu.o"
> "libs/regex/build/../src/icu.cpp"
> ...failed clang-linux.compile.c++.without-pth
> bin.v2/libs/regex/build/clang-linux-3.0/release/threading-multi/icu.o...
> (Here $a is /local/billw/arch/glnxa64.)
> I apologize for the length of this, but I didn't know what to leave out.
> Thanks in advance.

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