license: Fix copyright years in source files.

[liblbx.git] / m4 / libpng.m4

diff --git a/m4/libpng.m4 b/m4/libpng.m4
index 5adeb0f35ecb1ae3aefa48a4f5841b05f9dd882c..da3bac90a0bb4bc2f175b43c75c0307636f2a14f 100644 (file)
--- a/m4/libpng.m4
+++ b/m4/libpng.m4
@@ -1,4 +1,4 @@
-dnl Copyright (C) 2009 Nick Bowler
+dnl Copyright (C) 2009-2010 Nick Bowler
 dnl Copying and distribution of this file, with or without modification,
 dnl are permitted in any medium without royalty provided the copyright
 dnl notice and this notice are preserved.  This file is offered as-is,
@@ -6,17 +6,22 @@ dnl without any warranty.
 
 dnl _LIBPNG_TRY_VERSION(min-version)
 AC_DEFUN([_LIBPNG_TRY_VERSION], [dnl
-sedhead='s/@<:@0-9@:>@@<:@0-9@:>@*/<<<&>>>/'
-sedtail='s/.*<<<\(.*\)>>>.*/\1/;t;s/.*/0/'
-png_min_major=`printf   '%s' '$1' | sed -e "$sedhead"1 -e "$sedtail"`
-png_min_minor=`printf   '%s' '$1' | sed -e "$sedhead"2 -e "$sedtail"`
-png_min_release=`printf '%s' '$1' | sed -e "$sedhead"3 -e "$sedtail"`
-png_min_build=`printf   '%s' '$1' | sed -e "$sedhead"4 -e "$sedtail"`
+shead='s/@<:@0-9@:>@@<:@0-9@:>@*/<<<&>>>/'
+sbody='s/.*<<<\(.*\)>>>.*/\1/;t'
+stail='s/.*/0/'
+png_min_major=`printf   '%s' '$1' | sed -e "$shead"1 -e "$sbody" -e "$stail"`
+png_min_minor=`printf   '%s' '$1' | sed -e "$shead"2 -e "$sbody" -e "$stail"`
+png_min_release=`printf '%s' '$1' | sed -e "$shead"3 -e "$sbody" -e "$stail"`
+png_min_build=`printf   '%s' '$1' | sed -e "$shead"4 -e "$sbody" -e "$stail"`
 png_min_status=`printf  '%s' '$1' | sed '
-       t; s/.*alpha.*/PNG_LIBPNG_BUILD_ALPHA/
-       t; s/.*beta.*/PNG_LIBPNG_BUILD_BETA/
-       t; s/.*rc.*/PNG_LIBPNG_BUILD_RC/
-       t; s/.*/PNG_LIBPNG_BUILD_STABLE/
+       t
+       s/.*alpha.*/PNG_LIBPNG_BUILD_ALPHA/
+       t
+       s/.*beta.*/PNG_LIBPNG_BUILD_BETA/
+       t
+       s/.*rc.*/PNG_LIBPNG_BUILD_RC/
+       t
+       s/.*/PNG_LIBPNG_BUILD_STABLE/
 '`
 
 AC_CACHE_CHECK([for libpng version at least $1],