Poison the threads.h header by default in gnu.port.mk

This will avoid threads.h from devel/libstdthreads being picked up by
gnulib's threadlib.m4, potentially breaking due to dpb junking in bulk
builds. The header is included and some weak symbol magic is performed,
but it doesn't bring any useful feature as it doesn't even link against
libstdthreads.so. That gnulib module already falls back to
a pthreads-based implementation anyway.

Ultimately it probably makes sense for C11 threads support to go into
the base system, as already discussed several times by matthieu@ and
others.  But now isn't the right time as we're approaching release.

ok ajacoutot@ sthen@

infrastructure/db/config.no-stdthreads

@@ -0,0 +1,3 @@
+# $OpenBSD: config.no-stdthreads,v 1.1 2024/09/15 18:15:17 jca Exp $
+# included unless devel/libstdthreads
+ac_cv_header_threads_h=${ac_cv_header_threads_h=no}

infrastructure/mk/gnu.port.mk

@@ -1,6 +1,6 @@
 #-*- mode: Fundamental; tab-width: 4; -*-
 # ex:ts=4 sw=4 filetype=make:
-# $OpenBSD: gnu.port.mk,v 1.61 2019/05/14 14:59:56 naddy Exp $
+# $OpenBSD: gnu.port.mk,v 1.62 2024/09/15 18:15:17 jca Exp $
 #	Based on bsd.port.mk, originally by Jordan K. Hubbard.
 #	This file is in the public domain.
 
@@ -43,7 +43,8 @@ CONFIG_SITE_LIST += config.site
 	textproc/gsed gsed \
 	archivers/gtar* gtar \
 	lang/gawk gawk \
-	sysutils/coreutils coreutils
+	sysutils/coreutils coreutils \
+	devel/libstdthreads stdthreads
 .  if !defined(BUILD_DEPENDS) || !${BUILD_DEPENDS:M$d}
 CONFIG_SITE_LIST += config.no-${name}
 .  endif

math/octave/Makefile

@@ -2,7 +2,7 @@ COMMENT =      Scientific Programming Language
 
 VERSION =	7.3.0
 DISTNAME =	octave-${VERSION}
-REVISION =	8
+REVISION =	9
 EXTRACT_SUFX =	.tar.xz
 CATEGORIES =	math
 
@@ -40,7 +40,6 @@ MODULES =	fortran \
 		x11/qt5
 
 BUILD_DEPENDS =	${MODFORTRAN_BUILD_DEPENDS} \
-		devel/libstdthreads \
 		math/gnuplot \
 		print/texinfo \
 		textproc/gsed

math/pspp/Makefile

@@ -1,6 +1,6 @@
 COMMENT =	program for statistical analysis of sampled data
 DISTNAME =	pspp-1.4.1
-REVISION =	5
+REVISION =	6
 CATEGORIES =	math x11
 
 HOMEPAGE =	https://www.gnu.org/software/pspp/
@@ -30,7 +30,6 @@ MODULES =	lang/python
 MODPY_RUNDEP =	No
 
 BUILD_DEPENDS =	devel/gettext,-tools \
-		devel/libstdthreads \
 		print/texinfo
 
 LIB_DEPENDS =	databases/postgresql \