Re: CFLAGS vs COPTS in mk.conf for pkgsrc compiling

[Ramiro Aceves <ea1abz%gmail.com@localhost>]

El 7/9/24 a las 11:12, Roland Illig escribió:
> Am 07.09.2024 um 08:37 schrieb Ramiro Aceves:
> > Hello,

Hi Roland,

> > I started reading mk.conf page to see what variables could be tuned:
>
> The mk.conf manual page applies primarily to the NetBSD base system.
> Some parts of it may not apply to pkgsrc.
>
> The pkgsrc guide at https://www.netbsd.org/docs/pkgsrc/pkgsrc.html
> mentions CFLAGS several times and never COPTS, so that should be the way
> to go.

Yes, also in this PDF document where it is easier to do a global search, 
COPTS is missing (https://www.netbsd.org/docs/pkgsrc/pkgsrc.pdf)

> > "Also note that CFLAGS should never be set in mk.conf."
>
> In the context where this sentence occurs, it can also be interpreted as
> "appending to CFLAGS is fine, just don't override it, as its default
> value includes the DBG variable". Not sure why nobody fixed this
> ambiguous wording in the past 17 years.

Thanks so much for the explanation. Yes, it is a bit confusing and can 
be interpreted as you say.

> > so I used COPTS instead of CFLAGS
>
> That doesn't work in pkgsrc since in
> pkgtools/bootstrap-mk-files/files/sys.mk, the default value for CFLAGS
> does not include COPTS.
>
> To find this out, I ran this command in emulators/dosbox:
> > bmake -V CFLAGS -dA  2>&1 | less
>
> In the output, I searched for "Global: CFLAGS" and then went backwards
> to "Parse_PushInput" to see which file caused the variable assignment.
>
> In the NetBSD base system, COPTS is not added to CFLAGS unconditionally,
> as the output of this command reveals:
> > grep 'CFLAGS.*COPTS' /usr/share/mk/*.mk
>
>  From the filenames in the output, you can see that COPTS only applies to
> host libraries, kernel modules, libraries and programs. Notably, this
> excludes pkgsrc packages.


Thanks so much for the detailed information. All this pkgsrc makefiles 
structure appears very overhelming for newbies. :-)

Anyway, I am learning lots of things.

Regards.
Ramiro.


> Roland