Re: [Tinycc-devel] [FreeBSD support] __aligned(n) + __pure issues

[grischka]

Christian Jullien wrote:
> Ok,
> The point is that it compiles ROOTB but then a single line program using only 
> ISO include and std C library fails because of __aligned in a **system** header.
> I agree that __aligned is a probably a macro or a gcc FreeBSD specific 
> extension, but no one wants to change it source file (or Makefile) when he the 
> switch from gcc to tcc
> To be more clear, let me start again from scratch (Don’t miss *Linux* in banner 
> with -v and -vv)

Please!  You were clear.  Anyway, maybe this helps:
   
http://repo.or.cz/tinycc.git/commitdiff/f3c1ea6c2d7dca7883985820e46ec536e2d7e8cc
It is expected that this could break system xyz whatever.

Some background research:

- obviously FreeBSD headers expect __GNUC__
  http://pcc.ludd.ltu.se/jira/browse/PCC-18

- patch for sys/cdefs.h suggested by PCC
  http://pcc.ludd.ltu.se/ftp/pub/patches/openbsd-include-sys-081220.diff

- __GNUC__ nowadays seems to mean the C dialect rather than the compiler
  https://gcc.gnu.org/ml/gcc/2008-07/msg00026.html

Not sure whether we really want to define __GNUC__.  This might
cause all kind of problems.  However if we don't then sys/cdefs.h does
    #define __attribute__(xyz)

-- gr