Re: [release] Boost 1.85.0 Release Candidate 1 is available.

From: Peter Dimov (pdimov_at_[hidden])
Date: 2024-03-12 10:11:17

Rainer Deyke wrote:
> I am trying to produce portable binaries while using modern C++, so my policy
> is this:
>    - Compile on a Docker image with an older OS installed (currently Ubuntu
> 16.04 LTS) so that I can link to an older libc.
>    - Build my own compiler (currently gcc 13.2.0) instead of relying on the OS
> package manager.  This means libraries are installed in
> /usr/local/lib64 instead of /usr/lib.
>    - Statically link everything except libc, including libstdc++ (by setting
> CXXFLAGS=-static-libstdc++).
>    - Deliberately don't point LD_LIBRARY_PATH to /usr/local/lib64, because
> these libraries won't exist on the target system and should only be statically
> linked.
> 
> The problem is that while tools/build/src/engine/build.sh respects CXXFLAGS,
> bootstrap.sh deliberately clobbers CXXFLAGS from the environment, so b2 is
> built dynamically linked to a version of libstdc++ that it can't find at runtime.

You should use the --cxxflags option.