The PR I opened prior to discovering the scope of this issue is pkg/31138.
Whoever gets to these would probably use __NetBSD_Version__ >= 299000900
instead of what I supplied (I'm assuming the earlier releases didn't have
their version numbers changed retroactively), but I'll butt out now.

Dave

> 
> From: David H. Gutteridge <dhgutteridge@sympatico.ca>
> Date: 2005/09/04 Sun AM 03:54:18 EST
> To: <pkgsrc-bugs@netbsd.org>, <tech-pkg@netbsd.org>
> Subject: Patch files assuming old-style __NetBSD_Version__ which cause failures with 2.1
> 
> Hi all,
> 
> I don't know if this is already a known issue, but there are a bunch of
> patch files in pkgsrc which were coded to conditionally substitute new
> features in what was then the NetBSD-current branch (e.g. "2.0D"), and
> when the version numbering scheme changed, they were not updated to match.
> As a result, 2.1, which is __NetBSD_Version__ 201000000, is being taken to
> have features it does not, causing compile failures and more subtle problems
> in one case.
> 
> Most commonly, statvfs elements are being substituted for statfs, which
> simply causes compile failures in packages like audio/xmms (which I've
> filed a PR for, I haven't gotten an automated reply back yet so I can't
> give a reference to its PR number).  In the case of Mozilla/Firebird/
> Thunderbird, there's an assumption that DNS queries can use a thread-safe
> resolver, which does compile, but I can attest empirically that it
> causes some obnoxious behaviour in 2.1_RC3 (tons of hung DNS queries that
> never resolve).
> 
> I grepped the pkgsrc tree for problems of this nature, and examined the
> results by eye.  The following packages are adversely affected by this
> problem.  The majority will not compile under 2.1 in their present state.
> 
> (The grep results I've gone through:)
> 
> archivers/arj/patches/patch-aa:+  #if defined(__QNXNTO__)||defined(__sco__)||defined(SUNOS)||defined(__INTERIX)||(defined(__NetBSD__) && (__NetBSD_Version__ > 200030000))
> audio/gqmpeg/patches/patch-ab:+#if defined(__NetBSD__) && (__NetBSD_Version__ > 200030000)
> audio/libcdaudio/patches/patch-aa:+#if (defined(__NetBSD__) && __NetBSD_Version__ >= 200040000) /* NetBSD 2.0D */
> audio/snd/patches/patch-ah:+  #if (__NetBSD_Version__ >= 200040000) /* NetBSD 2.0D */
> audio/xmms/patches/patch-aa:+#if (defined(__NetBSD__) && __NetBSD_Version__ >= 200040000) /* NetBSD 2.0D */
> audio/tunepimp/patches/patch-ab:+#if defined(__NetBSD__) && (__NetBSD_Version__ >= 200040000) /* NetBSD 2.0D */
> chat/centericq/patches/patch-aa:+#if defined(__sun__) || (defined(__NetBSD__) && (__NetBSD_Version__ >= 200040000))
> comms/mgetty+sendfax/patches/patch-ah:+#if defined(__NetBSD__) && (__NetBSD_Version__ > 200030000)
> devel/physfs/patches/patch-ac:+#if defined(__NetBSD__) && (__NetBSD_Version__ >= 200040000)
> devel/pwlib/patches/patch-ad:+#if defined(__NetBSD__) && __NetBSD_Version__ > 200040000
> devel/libaura/patches/patch-aa:+#if (__NetBSD_Version__ >= 200040000)
> devel/libinstaller/patches/patch-aa:+#if (__NetBSD_Version__ >= 200040000)
> emulators/pcemu/patches/patch-ac:+#if defined(SOLARIS) || (defined(__NetBSD__) && __NetBSD_Version__ >= 200040000)
> graphics/blender/patches/patch-ab:+#if defined (__NetBSD__) && __NetBSD_Version__ >= 200040000 /* 2.0D */
> ham/dpbox/patches/patch-af:+#if defined(__NetBSD__) && (__NetBSD_Version__ >= 200040000)
> mail/exim/patches/patch-af:+#if __NetBSD_Version__ >= 200040000
> mail/exim3/patches/patch-ah:+#if __NetBSD_Version__ >= 200040000
> mail/postfix/patches/patch-ag:+#if (defined(__NetBSD__) && __NetBSD_Version__ >= 200040000) /* NetBSD 2.0D */
> mail/thunderbird/patches/patch-br:+#if defined(__NetBSD_Version__) && __NetBSD_Version__ < 200060000
> mail/sendmail812/patches/patch-ag:+#if defined(__NetBSD__) && (__NetBSD_Version__ > 200030000)
> misc/gnuls/patches/patch-ac:+# if defined(__NetBSD__) && (__NetBSD_Version__ > 200030000)
> misc/kdeutils3/patches/patch-ac:+#if __NetBSD_Version__ >= 200040000    /* 2.0D */
> misc/openoffice/patches/patch-as:+# if __NetBSD_Version__ >= 200040000
> misc/openoffice/patches/patch-at:+#  if __NetBSD_Version__ >= 200040000
> misc/openoffice/patches/patch-au:+#  if __NetBSD_Version__ >= 200040000
> multimedia/kdemultimedia3/patches/patch-ad:+# if __NetBSD_Version__ >= 200040000	 /* 2.0D */
> multimedia/libmpeg3/patches/patch-ae:+# if __NetBSD_Version__ >= 200040000	/* 2.0D */
> net/netatalk/patches/patch-ag:+#if defined(__svr4__) || (defined(__NetBSD__) && (__NetBSD_Version__ >= 200040000))
> net/rdist6/patches/patch-ae:+#if __NetBSD_Version__ < 200060000
> net/sharity-light/patches/patch-ab:+#if __NetBSD_Version__ >= 200040000
> net/sharity-light/patches/patch-ad:+#if defined(__NetBSD__) && __NetBSD_Version__ >= 200040000
> net/spegla/patches/patch-ab:+#if defined(Solaris) || (defined(__NetBSD__) && __NetBSD_Version__ >= 200040000)
> parallel/mpi-ch/patches/patch-ca:+#if __NetBSD_Version__ >= 200040000
> security/cfs/patches/patch-ag:+#if defined(__NetBSD_Version__) && __NetBSD_Version__ >= 200050000
> sysutils/coreutils/patches/patch-ab:+# if defined(__NetBSD__) && (__NetBSD_Version__ > 200030000)
> sysutils/coreutils/patches/patch-ac:+#if (defined(__NetBSD__) && (__NetBSD_Version__ > 200030000)) || defined(__INTERIX)
> sysutils/dvd+rw-tools/patches/patch-aa:+#if __NetBSD_Version__ >= 200040000
> sysutils/e2fsprogs/patches/patch-af:+#if defined(__NetBSD__) && __NetBSD_Version__ >= 200060000
> sysutils/gkrellm/patches/patch-aa:+#if (defined(__NetBSD__) && __NetBSD_Version__ >= 200040000) /* NetBSD 2.0D */
> sysutils/gkrellm1/patches/patch-ad:+#if defined(__NetBSD__) && (__NetBSD_Version__ >= 200040000) /* NetBSD 2.0D */
> sysutils/vobcopy/patches/patch-aa:+#if !defined(__NetBSD__) || (__NetBSD_Version__ < 200040000)
> sysutils/vobcopy/patches/patch-ab:+#if (defined(BSD) && (BSD >= 199306) && !defined(__NetBSD__)) ||(defined(__APPLE__) && defined(__GNUC__)) || (defined(__NetBSD__) && (__NetBSD_Version__ < 200040000))
> sysutils/ntfsprogs/patches/patch-af:+#  if __NetBSD_Version__ >= 200040000
> www/firefox/patches/patch-br:+#if defined(__NetBSD_Version__) && __NetBSD_Version__ < 200060000
> www/mozilla/patches/patch-br:+#if defined(__NetBSD_Version__) && __NetBSD_Version__ < 200060000
> x11/filerunner/patches/patch-ab:+#if defined(__NetBSD__) && (__NetBSD_Version__ >= 200040000) /* NetBSD 2.0D */
> 
> Regards,
> 
> Dave
> 
>