Re: pkg/59430: Revive pkgsrc on modern AIX

["Thomas Klausner via gnats" <gnats-admin%NetBSD.org@localhost>]

The following reply was made to PR pkg/59430; it has been noted by GNATS.

From: Thomas Klausner <wiz%gatalith.at@localhost>
To: "Callahan, Brian Robert" <callab5%rpi.edu@localhost>
Cc: "bcallah%openbsd.org@localhost" <bcallah%openbsd.org@localhost>,
	NetBSD bugtracking <gnats-bugs%NetBSD.org@localhost>
Subject: Re: pkg/59430: Revive pkgsrc on modern AIX
Date: Sat, 17 May 2025 19:08:03 +0200

 Hi Brian!
 
 Thanks for the information.
 
 I don't have a solution for you, but here are some hints, perhaps you
 can come up with something:
 
 OS_VERSION is set in pkgsrc/mk/bsd.prefs.mk, and there's a special
 case for AIX:
 
 .elif ${NATIVE_OPSYS} == "AIX"
 .  if exists(/usr/bin/oslevel)
 _NATIVE_OS_VERSION!=    /usr/bin/oslevel
 .  else
 _NATIVE_OS_VERSION!=    echo `${UNAME} -v`.`${UNAME} -r`
 .  endif
 NATIVE_OS_VERSION=              ${_NATIVE_OS_VERSION:C/([0-9]*\.[0-9]*).*/\1/}
 
 (OS_VERSION is later set using NATIVE_OS_VERSION).
 
 This means, if /usr/bin/oslevel is installed, its output is used as a
 version; if not, 'uname -v' and 'uname -r' are concatenated, which
 would lead to the 7.2 you see.
 
 (Is oslevel installed? What does it return?)
 
 The other version number to compare against is in
 pkgsrc/pkgtools/pkg_install/files/add/perform.c:
 
                   if (uname(&host_uname) < 0) {
 		      ...
 		  }
 
                   normalise_platform(host_name: &host_uname);
                   effective_opsys = OPSYS_NAME;
                   effective_os_version = host_uname.release;
 
 I.e. here, just host_uname.release is used, which is equivalent to
 'uname -r'.
 
 I didn't find any preprocessor symbol I could use in the C code to add
 AIX-specific changes to use the combination of host_uname.version and
 host_uname.release here. There[1] are some that check for the xlc
 compiler, but you're using gcc, so they won't help. Do you know of
 any?
 
 Btw, I think it would be a good idea to send your blog post as an
 email to the tech-pkg mailing list, I think you might get useful
 feedback there.
 
 Cheers,
  Thomas
 
 [1] https://www.ibm.com/docs/en/xl-c-aix/13.1.3?topic=macros-indicating-xl-compiler