Re: [Gc] FreeBSD/ia64 build error: ./include/private/gcconfig.h:2436:3: error: #error --> undefined ALIGNMENT

On 2014-04-24 15:41, Anton Shterenlikht wrote:
> ===>  Building for boehm-gc-7.2e
> /bin/sh ./libtool  --tag=CC    --mode=compile cc -DHAVE_CONFIG_H    -I./include -I./include  -I./libatomic_ops/src -I./libatomic_ops/src   -fexceptions -O2 -pipe  -fno-strict-aliasing -fno-strict-aliasing -MT allchblk.lo -MD -MP -MF .deps/allchblk.Tpo -c -o allchblk.lo allchblk.c
> libtool: compile:  cc -DHAVE_CONFIG_H -I./include -I./include -I./libatomic_ops/src -I./libatomic_ops/src -fexceptions -O2 -pipe -fno-strict-aliasing -fno-strict-aliasing -MT allchblk.lo -MD -MP -MF .deps/allchblk.Tpo -c allchblk.c  -fPIC -DPIC -o .libs/allchblk.o
> In file included from ./include/private/gc_priv.h:94,
>                  from allchblk.c:17:
> ./include/private/gcconfig.h:2436:3: error: #error --> undefined ALIGNMENT
> *** Error code 1
> 
> [...]
> 
> I'm not sure if this is a regression, or that boehm-gc never
> built on ia64, and some recent changes in the FreeBSD ports
> infrastructure made lots of ports to depend on it.
> 
> I'm happy to try patches, or provide other log files.

It never built on FreeBSD/ia64 (which is why the port is marked with
NOT_FOR_ARCHS=ia64). See gcconfig.h [1]: the "ifdef IA64" section
doesn't have "ifdef FREEBSD" clause in it. Perhaps you could add
something like this to that section:

  # ifdef FREEBSD
  #  define OS_TYPE "FREEBSD"
  #  define CPP_WORDSZ 64
  #  define ALIGNMENT 8
  #  define SEARCH_FOR_DATA_START
  #  define FREEBSD_STACKBOTTOM
  #  ifdef __ELF__
  #   define DYNAMIC_LOADING
  #  endif
  # endif

... and see if it builds and passes regression tests.

(This is a wild guess though; even if it will compile, applications may
still crash or leak memory; unfortunately more knowledge of the process
memory layout in FreeBSD/ia64 is needed than I have).

[1] https://github.com/ivmai/bdwgc/blob/master/include/private/gcconfig.h#L1814
[2] https://github.com/ivmai/bdwgc/blob/master/doc/porting.html