add extra_flags option to OpenSSL

[Enhex]

Summary

Changes to recipe: openssl/3.4.1

Motivation

the recipe is missing some build flags as options, so having extra_flags enables working around that.

Details

looking at https://git.symas.net/symas-public/openssl/-/blob/openssl-3.4/INSTALL.md?ref_type=heads#enable-and-disable-features
some flags are missing, for example: no-http, no-scrypt, no-siphash, ...

haven't tested it locally.

---

• Read the contributing guidelines
• Checked that this PR is not a duplicate: list of PRs by recipe
• Tested locally with at least one configuration using a recent version of Conan

[uilianries]

@Enhex Hello! Thank you for your suggestion of expanding OpenSSL configure arguments. Please, consider the new Conan configuration for extra configure variables added in Conan 1.17.0: conan-io/conan#18333 -

tools.gnu:extra_configure_args: List of extra arguments to pass to configure when using AutotoolsToolchain and GnuToolchain

Please, read more about Conan configuration in the documentation: https://docs.conan.io/2/reference/config_files/global_conf.html

In this case, you can add new arguments to OpenSSL configure without touching the recipe. For instance:

conan install -r conancenter --requires=openssl/3.4.1 --build=openssl/3.4.1 -c tools.gnu:extra_configure_args='["no-http", "no-scrypt"]'

Or, you can add it to your profile as well:

include(default)

[conf]
openssl/* :tools.gnu:extra_configure_args=["no-http", "no-scrypt"]

This will be active for OpenSSL only, for any version.

However, the package ID will not be affected, which means it will override the same package with a different build. But you can change the package ID in order to follow the configuration by using a second configuration:

-c tools.info.package_id:confs='["tools.gnu:extra_configure_args"]'

The same can be added to your profile as well.

I commented about using this alternative because the OpenSSL recipe in CCI has +60 options available and most of them are not tested, which implies a fragile recipe with several issues. Accepting one more option like yours, will open another non-tested option by the CI, which is really hard to maintain.

Please, feel free to share your thoughts about using the Conan configuration instead. Regards!

[Enhex]

@uilianries is it possible to set extra_configure_args in a python recipe file?

[uilianries]

@uilianries is it possible to set extra_configure_args in a python recipe file?

Yes, it's possible, but I don't see much advantage as you are touching the recipe already, you can change the configure arguments directly in the recipe without needing the configuration.

Usually, Conan confs are changed in cpp_info but only to forward its values when consuming the recipe, for instance: https://github.com/conan-io/conan-center-index/blob/master/recipes/android-ndk/all/conanfile.py#L300

What scenario are you trying to achieve? Maybe we can explore a solution.