Re: guile 2.2.3 crashing on osx 10.11?

[Dan Kegel <dank@kegel.com>]

On Sat, Dec 30, 2017 at 3:31 PM, Matt Wette <matt.wette@gmail.com> wrote:
>> On Dec 30, 2017, at 2:32 PM, Dan Kegel <dank@kegel.com> wrote:
>> osx 10.11, though, crashes when I just evaluate (display (version)),
>> or sometimes while building.
>
> I have not seen that on macOS before,  but previously ran into other issues.  This may help to chase it down:
>
> build with use
>         CFLAGS=-g LDFLAGS=-g ./configure --disable-shared --prefix=/opt/local
>
> in meta/gdb-uninstalled-guile, change:
>     gdb --args ${top_builddir}/libguile/guile "$@"
> to
>     lldb -- ${top_builddir}/libguile/guile "$@"
>
> and, IIRC, run meta/gdb-installed-guile

Thanks.  Also had to do
   sudo /usr/sbin/DevToolsSecurity --enable

Here's a backtrace:

* thread #1: tid = 0x1628f8, 0x00000001003e95be
libgmp.10.dylib`__gmpn_mul_1 + 94, queue = 'com.apple.main-thread',
stop reason = EXC_BAD_INSTRUCTION (code=EXC_I386_INVOP, subcode=0x0)
    frame #0: 0x00000001003e95be libgmp.10.dylib`__gmpn_mul_1 + 94
libgmp.10.dylib`__gmpn_mul_1:
->  0x1003e95be <+94>:  mulxq  (%rsi), %rbx, %rax

Guess what?  This machine is a i7-3720QM (in a Macbook Pro 9,1), which
doesn't support MULX.  (It's 2012 Ivy Bridge, which is just
pre-Haswell.)

$ gobjdump -d libgmp.dylib | grep mulx
confirms the presence of the mulx instruction.

So my gmp was built wrong for this machine.  (There was a related
bugfix for low-end cpus in gmp 6.1.1, but I've got 6.1.2, and no
low-end cpus.)

Bit of a mystery, then, but nothing to do with guile.
- Dan