[tlbuild] icu-76.2 in TL source tree, requires C++17

[Norbert Preining]

Hi Karl,

> (libs/icu). It requires C++17 (see "ICU4C Platform Support" near the

Ohh.

> So I thought I'd send a note here in case people want to adjust their
> builds now. There is no escaping it (apart from not building xetex et al.).

As expected, most CI building failed. x86_64 linux failed like this
https://github.com/TeX-Live/texlive-source/actions/runs/11544453432/job/32130019796

2024-10-27T23:00:10.1863534Z /work/repo/Work/libs/icu/include/unicode/stringpiece.h:135:66: error: template argument 1
 is invalid
2024-10-27T23:00:10.1864665Z   135 |                 (std::is_same_v<decltype(T().data()), const char*>
2024-10-27T23:00:10.1865590Z       |                                                                  ^

I guess that is too old a gcc :-(

> For Red Hat-based systems, I was able to complete the build by
> installing the package "gcc-toolset-13" and then running the build as
>   scl enable gcc-toolset-13 -- ./Build ...other args...

At the moment we have the following code on almalinux:

(for x86_64-linux)

     almalinux)
       yum update -y
       yum install -y gcc-toolset-9 fontconfig-devel libX11-devel libXmu-devel libXaw-devel
       . /opt/rh/gcc-toolset-9/enable
       ;;

Any suggestion what needs to be done? I am not aware what "scl" is ...


For i386-linux we use ubuntu xenial, I will see to which version bumping
this is necessary.

Best regards

Norbert

--
PREINING Norbert                              https://www.preining.info
arXiv / Cornell University   +   IFMGA Guide   +   TU Wien  +  TeX Live
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