Re: Recent change to xfns.c breaks compilation

[Kai Großjohann]

Richard Stallman <address@hidden> writes:

>     However, I think the simpler form to find the header (and define
>     either HAVE_LIBPNG_PNG_H or HAVE_PNG_H) should work:
>
>       AC_CHECK_HEADERS(libpng/png.h,,
>                        [AC_CHECK_HEADERS(png.h)])
>
> Can someone tell me if that really works?
> If it does, I'd like to install it.

I'm using the following, which appears to compile for me (after
running autoconf and then configure and then make bootstrap).  I only
tested the png.h case and not the libpng/png.h case, though.

Warning: I don't know what I'm doing.

Changed configure.in:

--- configure.in.~1.345.~       Mon Jul 21 09:57:17 2003
+++ configure.in        Tue Jul 22 10:43:55 2003
@@ -2145,14 +2145,20 @@
 
 ### Use -lpng if available, unless `--with-png=no'.
 HAVE_PNG=no
+HAVE_LIBPNG_PNG=no
 if test "${HAVE_X11}" = "yes"; then
   if test "${with_png}" != "no"; then
     AC_CHECK_HEADER(png.h,
       AC_CHECK_LIB(png, png_get_channels, HAVE_PNG=yes, , -lz -lm))
+    AC_CHECK_HEADER(libpng/png.h,
+      AC_CHECK_LIB(png, png_get_channels, HAVE_LIBPNG_PNG=yes, , -lz -lm))
   fi
 
   if test "${HAVE_PNG}" = "yes"; then
     AC_DEFINE(HAVE_PNG, 1, [Define to 1 if you have the png library (-lpng).])
+  fi
+  if test "${HAVE_LIBPNG_PNG}" = "yes"; then
+    AC_DEFINE(HAVE_LIBPNG_PNG, 1, [Define to 1 if you have the png library 
(-lpng).])
   fi
 fi
 

Changed src/xnfs.c:

--- xfns.c.~1.585.~     Mon Jul 14 09:58:20 2003
+++ xfns.c      Tue Jul 22 10:45:20 2003
@@ -7564,8 +7564,13 @@
  ***********************************************************************/
 
 #if HAVE_PNG
-
+#include <png.h>
+#endif
+#if HAVE_LIBPNG_PNG
 #include <libpng/png.h>
+#endif
+
+#if (HAVE_PNG||HAVE_LIBPNG_PNG)
 
 /* Function prototypes.  */
 


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