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Re: ORed build profiles

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On Sun, 23 Nov 2025 at 08:07:15 +0100, Matthias Klose wrote:
>Trying to work with ORed build profiles, either I fail to understand 
>how to work with these, or something is wrong with the implementation.

Some working examples, from src:glib2.0, which illustrate both ORed and 
ANDed build-deps:

# B-D on dbus-daemon, etc. if (!nocheck) || (!noinsttest)
Build-Depends:
  dbus-daemon <!nocheck> <!noinsttest>,

# B-D-A on cross-exe-wrapper if (cross && !nogir)
Build-Depends-Arch:
  cross-exe-wrapper <cross !nogir>,

To vary whether a package is built, you use the same syntax, but in the 
Build-Profiles field. So for example libglib2.0-tests is only built if 
installed tests and GIR are both enabled, which is written like this:

# Build if (!noinsttest) && (!nogir)
Package: libglib2.0-tests
Build-Profiles: <!noinsttest !nogir>

I can never remember that <a b> means "a AND b" and <a> <b> means "a OR 
b" (half the time I try to use them the other way round, which is 
wrong), so I've got into the habit of always adding a comment to 
indicate intent whenever something depends on a combination of two or 
more build profiles.

The different syntax involving commas and plus signs as described in 
https://wiki.debian.org/BuildProfileSpec#The_Package-List_field is 
specific to the Package-List field, and is not used in Build-Depends or 
Build-Profiles. In fact, that section of the wiki page does have a 
concrete example of a valid Build-Profiles field (followed by its 
translation into Package-List syntax).

The comma and plus sign are also quite confusing - if the Package-List 
is a context where whitespace and angle brackets can't be used, I would 
have expected something more like cross&!nocheck|nopython, but 
presumably there are syntax restrictions that rule out & and | in that 
context as well?

     smcv

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ORed build profiles Matthias Klose <doko@debian.org> - 2025-11-23 08:10 +0100
  Re: ORed build profiles Bastian Blank <waldi@debian.org> - 2025-11-23 08:40 +0100
  Re: ORed build profiles Ben Hutchings <ben@decadent.org.uk> - 2025-11-24 00:10 +0100
    Re: ORed build profiles Johannes Schauer Marin Rodrigues <josch@debian.org> - 2025-11-24 00:20 +0100
      Re: ORed build profiles Matthias Klose <doko@debian.org> - 2025-11-24 06:50 +0100
  Re: ORed build profiles Simon McVittie <smcv@debian.org> - 2025-11-24 18:30 +0100
    Re: ORed build profiles Guillem Jover <guillem@debian.org> - 2025-12-03 02:30 +0100

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