# HG changeset patch
# User Eric Blake <ebb9@byu.net>
# Date 1260400287 25200
# Node ID 8885cbc8bfe0e603f44048b22b6b0ddfcee0a51b
# Parent  ad699b96bf6b6fa826eb15a83e587df3e34d8bdd
link-warning: optimize generation

Avoid a useless use of cat.

* modules/link-warning (Makefile.am): Reduce process usage.

Signed-off-by: Eric Blake <ebb9@byu.net>

diff --git a/ChangeLog b/ChangeLog
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,10 +1,15 @@
+2009-12-09  Eric Blake  <ebb9@byu.net>
+
+	link-warning: optimize generation
+	* modules/link-warning (Makefile.am): Reduce process usage.
+
 2009-12-09  Bruno Haible  <bruno@clisp.org>
 
 	* doc/posix-functions/unsetenv.texi: Mention Solaris 10 bug for which a
 	workaround was added on 2009-11-17.
 
 2009-12-09  Jim Meyering  <meyering@redhat.com>
-            Bruno Haible  <bruno@clisp.org>
+	    Bruno Haible  <bruno@clisp.org>
 
 	link-warning: Allow extra lines at the top of build-aux/link-warning.h.
 	* modules/link-warning (Makefile.am): Make the comment-removing sed
@@ -16,7 +21,7 @@
 	most one group.
 
 2009-12-09  Simon Josefsson <simon@josefsson.org>
-            Bruno Haible  <bruno@clisp.org>
+	    Bruno Haible  <bruno@clisp.org>
 
 	* build-aux/link-warning.h: Add copyright notice.
 	* modules/link-warning (Makefile.am): Generate link-warning.h from
diff --git a/modules/link-warning b/modules/link-warning
--- a/modules/link-warning
+++ b/modules/link-warning
@@ -14,9 +14,8 @@
 # build-aux/link-warning.h, except that it has the copyright header cut off.
 link-warning.h: $(top_srcdir)/build-aux/link-warning.h
 	$(AM_V_GEN)rm -f $@-t $@ && \
-	cat $(top_srcdir)/build-aux/link-warning.h \
-	  | sed -e '1,/www\.gnu\.org\/licenses/d' | sed -e '1d' \
-	  > $@-t && \
+	sed -n '/GL_LINK_WARNING/,$$p' \
+	  $(top_srcdir)/build-aux/link-warning.h > $@-t && \
 	mv $@-t $@
 MOSTLYCLEANFILES += link-warning.h link-warning.h-t