Using PIE to build extensions for FrankenPHP: is it possible?

[gggeek]

Hello.

I am currently using FP as part of a testing suite, which runs both locally in a Docker container, and on GitHub. The test suite is also run using other webservers, which led me to the decision of installing FP via apt, rather than running it as a container.

All is good so far, and I am now at the point where I need to pull in php extensions brotli and zstd into the tests.

I have been adding to my scripts usage of PIE to get those two extensions installed, and the .so that get built seem to be working fine with php-fpm, but not with FP.

I suspect that the issue might have to do with the fact that the php-cli / php-fpm which is used outside of frankenphp is an nts build, whereas the one built in FP is a zts build.

I have seen that the FP Docker image comes with its own install-php-extensions, and I think I could use that in a multi-stage container build to build the zts version of the .so and copy them over to the container which will run FP, but that seems wasteful and brittle.

Is there a known way to use PIE instead to build the extra extensions for FP? In its docs I could not find any mention of forcing zts builds...

At this page:https://pkg.go.dev/github.com/dunglas/frankenphp#section-readme, I see a mention of pie-zts, but that binary does not seem to be available for debian/ubuntu, nor when manually installing pie from https://github.com/php/pie/releases/. Also, there is this post: https://discourse.thephp.foundation/t/php-dev-pre-rfc-deprecating-nts-and-making-zts-the-default-build-mode/5754.