[BZ #19239] Issue deprecation warnings on macro expansion.

By using __glibc_macro_warning instead of __attribute_deprecated__,
we get the deprecation warnings whenever the macros are expanded,
not just when they compile to a function call.  This is important
for unintentional uses like the test case in #19239 (C++ var(value)
initialization syntax, with a variable named "major").  It's also
simpler, because __REDIRECT is no longer required.

	* misc/sys/sysmacros.h (__SYSMACROS_DM, __SYSMACROS_DM1): New macros.
	(__SYSMACROS_DEPRECATION_MSG, __SYSMACROS_FST_DECL_TEMPL)
	(__SYSMACROS_FST_IMPL_TEMPL): Delete.
	(major, minor, makedev): Use __SYSMACROS_DM in definition, instead
	of redirected function names.

	* misc/sys/cdefs.h (__glibc_macro_warning): Activate for clang >= 3.5
	as well.  Document that MESSAGE must be a single string literal.

1 files changed, 11 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index 7521477dab..f2b6683003 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,14 @@
+2016-11-14  Zack Weinberg  <zackw@panix.com>
+
+	* misc/sys/sysmacros.h (__SYSMACROS_DM, __SYSMACROS_DM1): New macros.
+	(__SYSMACROS_DEPRECATION_MSG, __SYSMACROS_FST_DECL_TEMPL)
+	(__SYSMACROS_FST_IMPL_TEMPL): Delete.
+	(major, minor, makedev): Use __SYSMACROS_DM in definition, instead
+	of redirected function names.
+
+	* misc/sys/cdefs.h (__glibc_macro_warning): Activate for clang >= 3.5
+	as well.  Document that MESSAGE must be a single string literal.
+
 2016-11-11  Joseph Myers  <joseph@codesourcery.com>
 
 	* scripts/build-many-glibcs.py: New file.