bug#14361: Building guile 2.0.9 under mingw + msys

[Eli Zaretskii <eliz@gnu.org>]

> From: Andy Wingo <wingo@pobox.com>
> Cc: ludo@gnu.org,  10474-done@debbugs.gnu.org
> Date: Sun, 24 Feb 2013 14:25:06 +0100
> 
> So with these last commits, hopefully native MinGW builds are supported.
> Would you mind testing again?  Please send a new mail to
> bug-guile@gnu.org to track any new failures.

Thanks, and sorry for a long delay.

I tried today building Guile 2.0.9.  The C compilation went very
smoothly, with only a couple of warnings (one is the known iconv
prototype "issue", the other a variable that is set and not used).
However, once it got to compiling Scheme files, it repeatedly failed
after writing each .go file.  Here are a few typical failures:

       GEN      guile-procedures.texi
     Backtrace:
     In unknown file:
	?: 3 [apply-smob/1 #<boot-closure 234da60 (_ _ _)> #t ...]
	?: 2 [apply-smob/1 #<catch-closure 2e07050> quit #<unspecified>]
	?: 1 [apply-smob/1 #<boot-closure 234da60 (_ _ _)> #t ...]
	?: 0 [apply-smob/1 #<catch-closure 3f7eea0>]

     ERROR:

The program then sits at the ERROR: prompt, but does not accept any
input.

Seems that this comes from smob.c:

     static SCM
     scm_smob_trampoline (unsigned int nreq, unsigned int nopt,
			  unsigned int rest)
     {
       SCM trampoline;

       if (SCM_UNLIKELY (rest > 1 || nreq + nopt + rest > 3))
	 scm_out_of_range ("make-smob", scm_from_uint (nreq + nopt + rest));

       trampoline = SCM_SMOB_TRAMPOLINE (nreq, nopt, rest);

       if (SCM_LIKELY (SCM_UNPACK (trampoline)))
	 return trampoline;

       switch (nreq + nopt + rest)
	 {
	   /* The + 1 is for the smob itself.  */
	 case 0:
	   trampoline = scm_c_make_gsubr ("apply-smob/0", nreq + 1, nopt, rest,
					  apply_0);
	   break;
	 case 1:
	   trampoline = scm_c_make_gsubr ("apply-smob/1", nreq + 1, nopt, rest,
					  apply_1);

But I have no idea what it means.

When this happens, guile.exe still runs (actually, there are 2 Guile
processes, one a child of the other), so it is impossible to delete
guile-procedures.texi, because one of these processes holds it open.
I needed to kill guile.exe (the child) to be able to try again.

I tried "make -k" to see how far I can advance.  The next compilation
of ice-9/eval.scm then stops with the same error:

     make[2]: Entering directory `/d/usr/eli/utils/guile-2.0.9/module'
       GUILEC ice-9/eval.go
     wrote `ice-9/eval.go'
     Backtrace:
     In unknown file:
	?: 3 [apply-smob/1 #<boot-closure 26cca60 (_ _ _)> #t ...]
	?: 2 [apply-smob/1 #<catch-closure 2b12100> quit #<unspecified>]
	?: 1 [apply-smob/1 #<boot-closure 26cca60 (_ _ _)> #t ...]
	?: 0 [apply-smob/1 #<catch-closure 3af6340>]

     ERROR:

Similarly after compiling ice-9/readline.scm:

     wrote `ice-9/readline.go'
     Backtrace:
     In unknown file:
	?: 4 [apply-smob/1 #<catch-closure 246faf0> quit #<unspecified>]
     In ice-9/eval.scm:
      484: 3 [eval # #]
      481: 2 [lp (#<fluid 13>) (#<procedure 40d9d20 at ice-9/eval.scm:264:7 %args>)]
     In unknown file:
	?: 1 [apply-smob/1 #<catch-closure 3ccb440>]
     In ice-9/eval.scm:
      481: 0 [lp (#<fluid 12>) ((#<catch-closure 3ccb420>))]

     ice-9/eval.scm:481:19:

Any ideas?  Where should I look for the source of this problem?

TIA