Index: configure
===================================================================
--- configure (revision 62657)
+++ configure (revision 63138)
@@ -1,4 +1,4 @@
 #! /bin/sh
-# From configure.in Id: configure.in 58872 2009-02-13 09:18:23Z CE .
+# From configure.in Id.
 # Guess values for system-dependent variables and create Makefiles.
 # Generated by GNU Autoconf 2.59 for wxWidgets 2.8.10.
@@ -26380,7 +26380,7 @@
 
             if test "$ac_cv_header_png_h" = "yes"; then
-                echo "$as_me:$LINENO: checking for png_check_sig in -lpng" >&5
-echo $ECHO_N "checking for png_check_sig in -lpng... $ECHO_C" >&6
-if test "${ac_cv_lib_png_png_check_sig+set}" = set; then
+                echo "$as_me:$LINENO: checking for png_sig_cmp in -lpng" >&5
+echo $ECHO_N "checking for png_sig_cmp in -lpng... $ECHO_C" >&6
+if test "${ac_cv_lib_png_png_sig_cmp+set}" = set; then
   echo $ECHO_N "(cached) $ECHO_C" >&6
 else
@@ -26400,9 +26400,9 @@
 /* We use char because int might match the return type of a gcc2
    builtin and then its argument prototype would still apply.  */
-char png_check_sig ();
+char png_sig_cmp ();
 int
 main ()
 {
-png_check_sig ();
+png_sig_cmp ();
   ;
   return 0;
@@ -26430,10 +26430,10 @@
   echo "$as_me:$LINENO: \$? = $ac_status" >&5
   (exit $ac_status); }; }; then
-  ac_cv_lib_png_png_check_sig=yes
+  ac_cv_lib_png_png_sig_cmp=yes
 else
   echo "$as_me: failed program was:" >&5
 sed 's/^/| /' conftest.$ac_ext >&5
 
-ac_cv_lib_png_png_check_sig=no
+ac_cv_lib_png_png_sig_cmp=no
 fi
 rm -f conftest.err conftest.$ac_objext \
@@ -26441,7 +26441,7 @@
 LIBS=$ac_check_lib_save_LIBS
 fi
-echo "$as_me:$LINENO: result: $ac_cv_lib_png_png_check_sig" >&5
-echo "${ECHO_T}$ac_cv_lib_png_png_check_sig" >&6
-if test $ac_cv_lib_png_png_check_sig = yes; then
+echo "$as_me:$LINENO: result: $ac_cv_lib_png_png_sig_cmp" >&5
+echo "${ECHO_T}$ac_cv_lib_png_png_sig_cmp" >&6
+if test $ac_cv_lib_png_png_sig_cmp = yes; then
   PNG_LINK=" -lpng -lz"
 fi
Index: docs/changes.txt
===================================================================
--- docs/changes.txt (revision 62511)
+++ docs/changes.txt (revision 63138)
@@ -128,4 +128,5 @@
 - Added wxBORDER_THEME to XRC.
 - Speeded up wxTreeCtrl by caching text size (botg).
+- Fix building with using system libpng 1.4 (Volker Grabsch).
 
 wxMSW:
Index: configure.in
===================================================================
--- configure.in (revision 62657)
+++ configure.in (revision 63138)
@@ -3051,5 +3051,5 @@
 
             if test "$ac_cv_header_png_h" = "yes"; then
-                AC_CHECK_LIB(png, png_check_sig, PNG_LINK=" -lpng -lz", , [-lz -lm])
+                AC_CHECK_LIB(png, png_sig_cmp, PNG_LINK=" -lpng -lz", , [-lz -lm])
             fi