posix_spawn issues on i686

[Corinna Vinschen]

On Jan 10 11:38, Jeremy Drake via Cygwin wrote:
> >From https://github.com/msys2/MSYS2-packages/issues/2801
> 
> MSYS2 recently rebuilt GNU make 4.3, and I found that after rebuilding, it
> broke rather horribly on i686, where any attempt to run a command resulted
> in "Invalid argument" errors.  Some debugging revealed that rebuilding
> make resulted in it using posix_spawn now instead of vfork.  Passing
> --disable-posix-spawn to make's configure script results in a working i686
> make.
> 
> >From the MSYS2 bug report:
> 
> """
> For reference, I tried to rebuild "make" in cygwin 32 bit and it has the
> same problem:
> 
> rebuilding cygport make.cygport all results in a broken make
> Adding CYGCONF_ARGS="--disable-posix-spawn" to the cygport file and
> rebuilding again results in a good make
> A Makefile to reproduce the issue:
> 
> all:
> 	echo hi
> """
> 
> In addition, make check fails rather horribly as well.
> 
> I know that 32-bit is on the way out, but it is concerning to me that
> there is some latent bug lurking in this code path that is apparently not
> well exercised.

Can you create a simple, self-contained testcase in plain C?


Thanks,
Corinna