fixincludes: skip stdio_stdarg_h on modern darwin

All macOS SDK since at least macOS 10.9, and until macOS 10.12
(included), feature these lines in <stdio.h>:

/* DO NOT REMOVE THIS COMMENT: fixincludes needs to see:
 * __gnuc_va_list and include <stdarg.h> */

The clear intent (and effect) was to bypass gcc’s stdio_stdarg_h
fixinclude.

However, since macOS 10.13, these lines have been moved to <_stdio.h>,
which is itself included at the top of <stdio.h>. The unintended
consequence is that the stdio_stdarg_h fixinclude is now applied to
macOS <stdio.h>, where it is not needed. This useless fixinclude makes
the compiler more fragile and less portable.

A previous attempt to skip the stdio_stdarg_h fix entirely had to be
reverted, since it broken some very old macOS versions. The new fix is
to bypass the fix based on the detection of <_stdio.h> inclusion, which
is more robust.

fixincludes/ChangeLog:

	* fixincl.x: Regenerate.
	* inclhack.def (stdio_stdarg_h): Skip on darwin.

0 files changed, 0 insertions, 0 deletions