[newlib-cygwin] Remove unused __gnu_inline() attribute.

[newlib-cygwin] Remove unused __gnu_inline() attribute.

[Corinna Vinschen]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=e1563a05b714f42502496466f12df7b461f40dd1

commit e1563a05b714f42502496466f12df7b461f40dd1
Author: pfg <pfg@FreeBSD.org>
Date:   Tue Apr 4 09:04:56 2017 +0200

    Remove unused __gnu_inline() attribute.
    
    This was meant to be used by a future FORTIFY_SOURCE implementation.
    Probably for good, FORTIFY_SOURCE and this particular GCCism were never
    well supported by clang or other compilers. Furthermore, the technology
    has long since been replaced by either static checkers, sanitizers, or
    even just the strong stack protector that was enabled by default.
    
    Drop __gnu_inline to avoid cluttering the headers.
    
    MFC after:	5 days

Diff:
---
 newlib/libc/include/sys/cdefs.h | 16 ----------------
 1 file changed, 16 deletions(-)

diff --git a/newlib/libc/include/sys/cdefs.h b/newlib/libc/include/sys/cdefs.h
index ad23232..679425a 100644
--- a/newlib/libc/include/sys/cdefs.h
+++ b/newlib/libc/include/sys/cdefs.h
@@ -537,22 +537,6 @@
 	    __attribute__((__format__ (__strftime__, fmtarg, firstvararg)))
 #endif
 
-/*
- * FORTIFY_SOURCE, and perhaps other compiler-specific features, require
- * the use of non-standard inlining.  In general we should try to avoid
- * using these but GCC-compatible compilers tend to support the extensions
- * well enough to use them in limited cases.
- */ 
-#if defined(__GNUC_GNU_INLINE__) || defined(__GNUC_STDC_INLINE__)
-#if __GNUC_PREREQ__(4, 3) || __has_attribute(__artificial__)
-#define	__gnu_inline	__attribute__((__gnu_inline__, __artificial__))
-#else
-#define	__gnu_inline	__attribute__((__gnu_inline__))
-#endif /* artificial */
-#else
-#define	__gnu_inline
-#endif
-
 /* Compiler-dependent macros that rely on FreeBSD-specific extensions. */
 #if defined(__FreeBSD_cc_version) && __FreeBSD_cc_version >= 300001 && \
     defined(__GNUC__) && !defined(__INTEL_COMPILER)