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Lix should provide pragmas for major, minor, and patch version. #1038

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opened 2025-11-18 05:49:02 +00:00 by bacchanalia · 3 comments
bacchanalia commented 2025-11-18 05:49:02 +00:00
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When linking against lix from external tools, it would be nice to have numeric LIX_MAJOR, LIX_MINOR, and LIX_PATCH pragmas available to make it easier to build tools that can be build against multiple lix versions. PACKAGE_VERSION is not sufficient because it's not possible (or at least not easy) to parse in CPP.

I ran into this issue when updating nix-serve-ng to work with lix-2.93, which I solved by using

 #if __has_include (<lix/libutil/async.hh>)

but future cases such a work around might not be available.

When linking against lix from external tools, it would be nice to have numeric LIX_MAJOR, LIX_MINOR, and LIX_PATCH pragmas available to make it easier to build tools that can be build against multiple lix versions. PACKAGE_VERSION is not sufficient because it's not possible (or at least not easy) to parse in CPP. I ran into this issue when updating nix-serve-ng to work with lix-2.93, which I solved by using ```cpp #if __has_include (<lix/libutil/async.hh>) ``` but future cases such a work around might not be available.
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lix-bot commented 2025-11-18 20:26:22 +00:00
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This issue was mentioned on Gerrit on the following CLs:

  • commit message in cl/4609 ("libutil: include LIX_MAJOR, LIX_MINOR, and LIX_PATCH macros")
<!-- GERRIT_LINKBOT: {"cls": [{"backlink": "https://gerrit.lix.systems/c/lix/+/4609", "number": 4609, "kind": "commit message"}], "cl_meta": {"4609": {"change_title": "libutil: include LIX_MAJOR, LIX_MINOR, and LIX_PATCH macros"}}} --> This issue was mentioned on Gerrit on the following CLs: * commit message in [cl/4609](https://gerrit.lix.systems/c/lix/+/4609) ("libutil: include LIX_MAJOR, LIX_MINOR, and LIX_PATCH macros")
raito commented 2025-11-19 14:15:22 +00:00
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@qyriad I think it makes sense to backport this for 2.93.4 and 2.94.1 I suppose?

@qyriad I think it makes sense to backport this for 2.93.4 and 2.94.1 I suppose?
qyriad commented 2025-11-20 12:02:44 +00:00
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Probably, yes

Probably, yes
qyriad reopened this issue 2025-11-20 12:02:44 +00:00
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Probably affects CppNix. This is a best-effort tag for troubles in old code; it exists to inform the CppNix team about problems they might care about also.

  
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make lix go faster

  
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makes the user experience better :)

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