1 files changed, 38 insertions, 0 deletions
diff --git a/conf/m4/kde/AC_FIND_PNG.m4 b/conf/m4/kde/AC_FIND_PNG.m4
new file mode 100644
index 0000000..404a647
--- /dev/null
+++ b/conf/m4/kde/AC_FIND_PNG.m4
@@ -0,0 +1,38 @@
+AC_DEFUN(AC_FIND_PNG,
+[
+AC_REQUIRE([AC_FIND_ZLIB])
+AC_REQUIRE([KDE_CHECK_EXTRA_LIBS])
+AC_MSG_CHECKING([for libpng])
+AC_CACHE_VAL(ac_cv_lib_png,
+[
+kde_save_LIBS="$LIBS"
+LIBS="$LIBS $all_libraries -lpng $LIBZ -lm -lX11 $LIBSOCKET"
+kde_save_CFLAGS="$CFLAGS"
+CFLAGS="$CFLAGS $all_includes"
+AC_LANG_C
+AC_TRY_LINK(dnl
+    [
+    #include<png.h>
+    ],
+    [
+    png_structp png_ptr = png_create_read_struct(  /* image ptr */
+		PNG_LIBPNG_VER_STRING, 0, 0, 0 );
+    return( png_ptr != 0 );
+    ],
+    eval "ac_cv_lib_png='-lpng $LIBZ -lm'",
+    eval "ac_cv_lib_png=no"
+)
+LIBS="$kde_save_LIBS"
+CFLAGS="$kde_save_CFLAGS"
+])dnl
+if eval "test ! \"`echo $ac_cv_lib_png`\" = no"; then
+  AC_DEFINE_UNQUOTED(HAVE_LIBPNG, 1, [Define if you have libpng])
+  LIBPNG="$ac_cv_lib_png"
+  AC_SUBST(LIBPNG)
+  AC_MSG_RESULT($ac_cv_lib_png)
+else
+  AC_MSG_RESULT(no)
+  LIBPNG=""
+  AC_SUBST(LIBPNG)
+fi
+])