From 6ef9f70bdbe3fdb7b16d7c9726e624700d774136 Mon Sep 17 00:00:00 2001
From: Ulrich Drepper <drepper@redhat.com>
Date: Sat, 4 Jul 1998 10:17:03 +0000
Subject: [PATCH] [versioning=yes]: Build the mapfiles with a pattern rule that
 lists all of them as targets. (sysd-versions): Depend only on Versions.def. 
 Write a Makefile fragment that defines $(vers-libs) based on contents of that
 file; then include it. (lib-noranlib): Depend on lib-mapfiles not
 sysd-versions. (lib-mapfiles): New target, depends on sysd-versions and
 $(vers-libs). Predicate all this on avoid-generated unset as well as
 versioning.

---
 Makefile | 24 ++++++++++++++++++------
 1 file changed, 18 insertions(+), 6 deletions(-)

diff --git a/Makefile b/Makefile
index c36f1acf59..ea36637def 100644
--- a/Makefile
+++ b/Makefile
@@ -78,7 +78,7 @@ install-others += $(inst_includedir)/gnu/lib-names.h
 endif
 
 ifeq ($(versioning),yes)
-lib-noranlib: $(common-objpfx)sysd-versions
+lib-noranlib: lib-mapfiles
 endif
 
 include Makerules
@@ -318,10 +318,22 @@ remove-old-headers:
 
 # Generate version maps.
 ifeq ($(versioning),yes)
-$(common-objpfx)sysd-versions: versions.awk \
-			       $(wildcard $(all-subdirs:%=%/Versions)) \
-			       $(wildcard $(+sysdep_dirs:%=%/Versions))
+ifndef avoid-generated
+$(common-objpfx)sysd-versions: Versions.def
+	(echo define vers-libs; \
+	sed -n 's/\(lib[a-zA-Z0-9_][a-zA-Z0-9_]*\) {/$$(common-objpfx)\1%map/p' $<; \
+	echo endef) > $@T
+	mv -f $@T $@
+-include $(common-objpfx)sysd-versions
+vers-libs := $(subst $(\n), ,$(vers-libs))
+
+$(vers-libs): versions.awk \
+	       $(wildcard $(subdirs:%=%/Versions)) \
+	       $(wildcard $(+sysdep_dirs:%=%/Versions))
 	$(AWK) -v 'buildroot=$(common-objpfx)' -f $^
-	rm -f $@
-	echo > $@
+
+lib-mapfiles: $(common-objpfx)sysd-versions $(subst %,.,$(vers-libs))
+else
+lib-mapfiles:
+endif
 endif