Use linker script to make __start/stop_link_set_modules be present

in libs built with binutils >=2.19.  This is a less error-prone
method than the previous where components had to be tagged in the
Makefile as modules (and if they weren't, things broke.  and vice
versa).

sys/rump/Makefile.rump

@@ -1,4 +1,4 @@
-#	$NetBSD: Makefile.rump,v 1.44 2009/11/27 13:36:30 pooka Exp $
+#	$NetBSD: Makefile.rump,v 1.45 2009/12/12 17:10:19 pooka Exp $
 #
 
 WARNS?=		3	# XXX: src/sys won't compile with -Wsign-compare yet
@@ -24,6 +24,7 @@ CPPFLAGS+=	-I${RUMPTOP}/../../common/include -I${RUMPTOP}/../arch
 CPPFLAGS+=	-I${RUMPTOP}/include
 CPPFLAGS+=	-I${RUMPTOP}/librump/rumpkern/opt
 CPPFLAGS+=	-nostdinc -I${RUMPTOP}/..
+LDFLAGS+=	-T ${RUMPTOP}/ldscript.rump
 #CPPFLAGS+=	-DDEBUG
 
 # kernel libs should not get linked against libc
@@ -45,15 +46,6 @@ CPPFLAGS+=	-DPPC_OEA
 # If this file changes, we need a full rebuild
 DPSRCS+=	${RUMPTOP}/Makefile.rump
 
-.ifdef RUMP_ISMODULE
-.PATH:		${RUMPTOP}/librump
-SRCS+=		rump_module.c
-.endif
-.ifdef RUMP_ISDOMAIN
-.PATH:		${RUMPTOP}/librump
-SRCS+=		rump_domain.c
-.endif
-
 #
 # Rename library symbols before use.  If a symbol does not already belong
 # to a rump namespace ("rump" or "RUMP"), prefix it with "rumpns".  This

sys/rump/fs/lib/Makefile.inc

@@ -1,7 +1,6 @@
-#	$NetBSD: Makefile.inc,v 1.13 2009/09/13 22:51:41 pooka Exp $
+#	$NetBSD: Makefile.inc,v 1.14 2009/12/12 17:10:19 pooka Exp $
 #
 
 RUMPTOP=	${.CURDIR}/../../..
-RUMP_ISMODULE=	# defined
 
 .include "${RUMPTOP}/Makefile.rump"

sys/rump/ldscript.rump

@@ -0,0 +1,28 @@
+/*	$NetBSD: ldscript.rump,v 1.1 2009/12/12 17:10:19 pooka Exp $	*/
+
+/*
+ * From binutils 2.19 onwards (in NetBSD) binutils ld PROVIDEs
+ * __start/__stop for orphaned sections.  This means that
+ * __start_link_set_modules/__stop_link_set_modules will no
+ * longer automatically be present in shared libraries.  This
+ * ldscript forces those symbols to be present for all rump
+ * shared lib components.
+ */
+
+SECTIONS
+{
+	link_set_modules :
+	{
+		__start_link_set_modules = .;
+		*(link_set_modules);
+		__stop_link_set_modules = .;
+	}
+
+	link_set_domains :
+	{
+		__start_link_set_domains = .;
+		*(link_set_domains);
+		__stop_link_set_domains = .;
+	}
+}
+INSERT AFTER .data;

sys/rump/librump/rump_domain.c

@@ -1,14 +0,0 @@
-/*	$NetBSD: rump_domain.c,v 1.1 2009/09/13 22:51:42 pooka Exp $	*/
-
-/*
- * Force reference to __start_link_set_domains, so that the
- * binutils 2.19 linker does not lose the symbol due to it being
- * PROVIDEd in 2.19 as opposed to earlier versions where it was
- * defined.
- *
- * Note: look into this again when all platforms use 2.19
- */
-extern void *__start_link_set_domains;
-void *rump_start_domains = &__start_link_set_domains;
-extern void *__stop_link_set_domains;
-void *rump_stop_domains = &__stop_link_set_domains;

sys/rump/librump/rump_module.c

@@ -1,14 +0,0 @@
-/*	$NetBSD: rump_module.c,v 1.1 2009/09/13 22:51:42 pooka Exp $	*/
-
-/*
- * Force reference to __start_link_set_modules, so that the
- * binutils 2.19 linker does not lose the symbol due to it being
- * PROVIDEd in 2.19 as opposed to earlier versions where it was
- * defined.
- *
- * Note: look into this again when all platforms use 2.19
- */
-extern void *__start_link_set_modules;
-void *rump_start_modules = &__start_link_set_modules;
-extern void *__stop_link_set_modules;
-void *rump_stop_modules = &__stop_link_set_modules;

sys/rump/net/lib/liblocal/Makefile

@@ -1,4 +1,4 @@
-#	$NetBSD: Makefile,v 1.3 2009/09/13 22:51:42 pooka Exp $
+#	$NetBSD: Makefile,v 1.4 2009/12/12 17:10:19 pooka Exp $
 #
 
 .PATH:	${.CURDIR}/../../../../kern
@@ -10,7 +10,5 @@ SRCS+=	component.c
 
 CFLAGS+= -Wno-pointer-sign
 
-RUMP_ISDOMAIN=
-
 .include <bsd.lib.mk>
 .include <bsd.klinks.mk>

sys/rump/net/lib/libnet/Makefile

@@ -1,4 +1,4 @@
-#	$NetBSD: Makefile,v 1.6 2009/09/13 22:51:42 pooka Exp $
+#	$NetBSD: Makefile,v 1.7 2009/12/12 17:10:19 pooka Exp $
 #
 
 .PATH:	${.CURDIR}/../../../../net
@@ -12,8 +12,6 @@ SRCS+=	component.c
 
 CPPFLAGS+=	-I${.CURDIR}/opt -I${.CURDIR}/../libnetinet/opt
 
-RUMP_ISDOMAIN=
-
 .include "${.CURDIR}/../libnetinet/Makefile.inc"
 
 .include <bsd.lib.mk>

sys/rump/net/lib/libsockin/Makefile

@@ -1,4 +1,4 @@
-#	$NetBSD: Makefile,v 1.4 2009/09/13 22:51:42 pooka Exp $
+#	$NetBSD: Makefile,v 1.5 2009/12/12 17:10:20 pooka Exp $
 #
 
 LIB=	rumpnet_sockin
@@ -8,7 +8,5 @@ SRCS+=	component.c
 
 CPPFLAGS+= -I${RUMPTOP}/librump/rumpkern
 
-RUMP_ISDOMAIN=
-
 .include <bsd.lib.mk>
 .include <bsd.klinks.mk>