[libpng16] Check for __has_extension before using it in pngconf.h, to
support older Clang versions (Jeremy Sequoia).
diff --git a/ANNOUNCE b/ANNOUNCE
index c4ffef0..a3384d0 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -1,5 +1,5 @@
-Libpng 1.6.10beta02 - February 17, 2014
+Libpng 1.6.10beta02 - February 20, 2014
This is not intended to be a public release. It will be replaced
within a few weeks by a public version or by another test version.
@@ -55,7 +55,7 @@
and it adds corresponding code to pngimage.c to handle such options
by not attempting to test them.
-Version 1.6.10beta02 [February 17, 2014]
+Version 1.6.10beta02 [February 20, 2014]
Moved redefines of png_error(), png_warning(), png_chunk_error(),
and png_chunk_warning() from pngpriv.h to png.h to make them visible
to libpng-calling applications.
@@ -70,6 +70,8 @@
run all the png_handle_*() and depend on them to return if info_ptr == NULL.
This improves the performance of png_read_end(png_ptr, NULL) and makes
it more robust against future programming errors.
+ Check for __has_extension before using it in pngconf.h, to
+ support older Clang versions (Jeremy Sequoia).
Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit
diff --git a/CHANGES b/CHANGES
index 3d1fa89..1a1b68a 100644
--- a/CHANGES
+++ b/CHANGES
@@ -4829,7 +4829,7 @@
and it adds corresponding code to pngimage.c to handle such options
by not attempting to test them.
-Version 1.6.10beta02 [February 17, 2014]
+Version 1.6.10beta02 [February 20, 2014]
Moved redefines of png_error(), png_warning(), png_chunk_error(),
and png_chunk_warning() from pngpriv.h to png.h to make them visible
to libpng-calling applications.
@@ -4844,6 +4844,8 @@
run all the png_handle_*() and depend on them to return if info_ptr == NULL.
This improves the performance of png_read_end(png_ptr, NULL) and makes
it more robust against future programming errors.
+ Check for __has_extension before using it in pngconf.h, to
+ support older Clang versions (Jeremy Sequoia).
Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit
diff --git a/pngconf.h b/pngconf.h
index 8ab109e..3c26c79 100644
--- a/pngconf.h
+++ b/pngconf.h
@@ -1,7 +1,7 @@
/* pngconf.h - machine configurable file for libpng
*
- * libpng version 1.6.10beta02 - February 9, 2014
+ * libpng version 1.6.10beta02 - February 20, 2014
*
* Copyright (c) 1998-2013 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -376,9 +376,11 @@
# define PNG_DEPRECATED __attribute__((__deprecated__))
# endif
# if !defined(PNG_PRIVATE)
-# if __has_extension(attribute_unavailable_with_message)
-# define PNG_PRIVATE __attribute__((__unavailable__(\
- "This function is not exported by libpng.")))
+# ifdef __has_extension
+# if __has_extension(attribute_unavailable_with_message)
+# define PNG_PRIVATE __attribute__((__unavailable__(\
+ "This function is not exported by libpng.")))
+# endif
# endif
# endif
# ifndef PNG_RESTRICT
