macosx_deployment_target - building for previous versions from MacOS 10.13

[Ryan Schmidt]

On Sep 4, 2020, at 05:53, Friedrich Beckmann wrote:

> :info:configure checking if /usr/bin/clang++ works... no
> :info:configure configure: WARNING: Ignore /usr/bin/clang++, since it cannot compile hello-world.
> :info:configure configure: WARNING: You don't have any C++ compiler, too bad
> 
> because the 10.5 and libc++ does not fit as you say.

You'd need to examine the config.log to see why it failed.

> When I install the port with
> 
> port -v install ncurses configure.cxx_stdlib="libstdc++“
> 
> then I can install ncurses (MacOS 10.13 with XCode 10.1).
> 
> When I try to compile icu with this setting to go further down then I hit the c++11 problem that you mention below (not compatible with libstdc++). 

Correct, the version of icu we use now requires C++11, which the system's libstdc++ does not support. Newer libstdc++ does support C++11.