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Re: GNU AutoGen Version 5.11.6/AutoOpts Version 34.0

From: Ludovic Courtès
Subject: Re: GNU AutoGen Version 5.11.6/AutoOpts Version 34.0
Date: Tue, 22 Feb 2011 21:42:44 +0100
User-agent: Gnus/5.110011 (No Gnus v0.11) Emacs/23.2 (gnu/linux)

Hi Bruce,

Bruce Korb <address@hidden> writes:

> On 02/22/11 05:27, Ludovic Courtès wrote:
>> It seems there’s still an issue:
>> --8<---------------cut here---------------start------------->8---
>> gcc -std=gnu99 -DHAVE_CONFIG_H -I. -I.. -I.. -I../autoopts   -pthread 
>> -I/nix/store/x8n3bs4jyy1im0jw1xikkqhfijgm36hz-libunistring-0.9.3/include 
>> -I/nix/store/7z0h50prh7iyqwylr9sikgkhn4kqsh2q-guile-2.0.0/include/guile/2.0 
>> -I/nix/store/j78gdcwhr5q38c2f5ipcr2h4xfnjr0gj-boehm-gc-7.2pre20110122/include
>>    -g -O2 -c -o autogen-ag.o `test -f 'ag.c' || echo './'`ag.c
>> In file included from 
>> /nix/store/7z0h50prh7iyqwylr9sikgkhn4kqsh2q-guile-2.0.0/include/guile/2.0/libguile.h:47:0,
>>                  from autogen.h:35,
>>                  from ag.c:5:
>> /nix/store/7z0h50prh7iyqwylr9sikgkhn4kqsh2q-guile-2.0.0/include/guile/2.0/libguile/eval.h:82:0:
>>  warning: "scm_primitive_eval_x" redefined
>> ../config.h:530:0: note: this is the location of the previous definition
> This gets inserted into config.h, presumably, when trying to use
> the function fails in a config script macro:
>>   AC_MSG_CHECKING([whether scm_primitive_eval_x links])
>>   AC_CACHE_VAL([ag_cv_link_eval_string],[
>>     ag_save_CPPFLAGS="${CPPFLAGS}"
>>     CPPFLAGS="${ag_cv_with_libguile_cflags} ${CPPFLAGS}"
>>     ag_save_LIBS="${LIBS}"
>>     LIBS="${ag_cv_with_libguile_libs} ${LIBS}"
>>   AC_TRY_LINK(address@hidden:@include <guile/gh.h>
>> @%:@include <libguile.h>],
>>     [SCM res = scm_primitive_eval_x( SCM_UNDEFINED );],
>>     [ag_cv_link_eval_string=yes],[ag_cv_link_eval_string=no]
>>   ) # end of TRY_LINK
>>     CPPFLAGS="${ag_save_CPPFLAGS}"
>>     LIBS="${ag_save_LIBS}"
>>   ]) # end of AC_CACHE_VAL for ag_cv_link_eval_string
>>   AC_MSG_RESULT([${ag_cv_link_eval_string}])
>>   if test "X${ag_cv_link_eval_string}" = Xno
>>   then
>>     AC_DEFINE([scm_primitive_eval_x], [scm_eval_x],
>>         [Define this if no scm_primitive_eval_x])
>> AC_DEFINE([scm_t_port], [scm_port], [Define this if no scm_t_port])
>>   fi
>> ]) # end of AC_DEFUN of AG_LINK_EVAL_STRING
> At this point, I *THINK* I can presume Guile 1.4 to be dead and gone.
> Thus I *THINK* I can presume that a working libguile has scm_primitive_eval_x.
> Consequently, I can simply remove this test and fix this part of the problem.
> Confirmation would be appreciated.  Still, this macro ought to have worked
> correctly.  Oh, wait, maybe the "#include <guile/gh.h>" messed things up?
> Is that true?

Yes, GH was deprecated in 1.8 (and 1.6, IIRC), and it’s no longer in 2.0.

>> In file included from ag.c:17:0:
>> expState.c: In function 'find_entry_value':
>> expState.c:155:18: error: 'scm_listofnull' undeclared (first use in this 
>> function)
> So, what happened to scm_listofnull?  Is this another interface change?

Oops, yes.  It apparently vanished unintentionally as a side-effect of
e7efe8e793fa51ea898aea4477939c598b3e9fac in Dec. 2009, which is why NEWS
doesn’t mention it.

All I can recommend is another AC_LINK_IFELSE, or better yet, using your
own variable instead:

  scm_listofnull = scm_list_1 (SCM_EOL);

Hope this helps,

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