Re: make segfault building cross-glibc with latest cygwin

[Dan Kegel <dank at kegel dot com>]

Dan Kegel wrote:
> > I've been adding cygwin support to http://kegel.com/crosstool
> > so I can build hetrogenous distcc clusters targeting e.g. Red Hat 6.2.
> > I have a nice automated shell script to do this;
> > works great under Linux, and I'm slowly chipping away at the problems
> > under Cygwin.  The latest one is a Heisenbug: a submake crashes,
> > but only if I don't run it under gdb :-(

Aha.  Using 'make -d' shows more detail:

Report bugs to <bug-make@gnu.org>.

Reading makefiles...
Reading makefile `Makefile'...
Reading makefile `../Makeconfig' (search path) (no ~ expansion)...
...
Reading makefile 
`/cygdrive/c/dank/test/crosstool-0.28-pre8c/build/i686-unknown-
linux-gnu/gcc-2.95.3-glibc-2.1.3/build-glibc/iconvdata/iconv-rules' 
(search path) (don't care) (no ~ expansion)...
Reading makefile `extra-module.mk' (search path) (no ~ expansion)...
Reading makefile `extra-module.mk' (search path) (no ~ expansion)...
[ 129 repeats of above line ]
Reading makefile `extra-module.mk' (search path) (no ~ expansion)...
Got a SIGCHLD; 1 unreaped children.
Reaping losing child 0x0a07a738 PID 492
make[1]: *** [iconvdata/lib] Segmentation fault (core dumped)
Removing child 0x0a07a738 PID 492  from chain.

so the recursion in extra-module.mk (which is expected, though
I don't know how many repeats are normal) is going awry somehow.

I'll look into it more when I don't have a sqiggly baby on my lap
who wants to help.
- Dan

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