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Re: Cross-build issues in gdb/gnulib
From: |
Pedro Alves |
Subject: |
Re: Cross-build issues in gdb/gnulib |
Date: |
Tue, 25 Aug 2015 14:39:56 +0100 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.5.0 |
Adding gnulib@
Original thread here:
https://sourceware.org/ml/gdb/2015-08/msg00037.html
Thanks,
Pedro Alves
On 08/25/2015 02:12 PM, address@hidden wrote:
>
>> On Aug 25, 2015, at 5:56 AM, Pedro Alves <address@hidden> wrote:
>>
>> On 08/24/2015 10:20 PM, address@hidden wrote:
>>> I'm running into strange problems cross-building with V7.7.1; it looks like
>>> the same configure machinery is present in later versions as well.
>>>
>>> The problem is that the configure script in gdb/gnulib tries to run a
>>> number of tests, by building and then executing "conftest". It does so
>>> unconditionally, there are no checks for whether this is a cross-build,
>>> specifically build = x86_64-linux, host = target = netbsd.
>>
>> I have no idea why configure is trying to run the test in your case, but I
>> just yesterday
>> updated master's gnulib copy to current upstream gnulib master. Previously
>> we had
>> a 2012 copy. I don't see any AC_TRY_RUN in current master, for instance,
>> though I didn't check older versions. In any case, try seeing if current
>> master makes
>> a difference.
>
> I tracked down the spot in the configure sources where the problem
> originates. There is no AC_TRY_RUN involved. Instead, the issue is this bit
> of code in gnulib/import/m4/locale-ja.m4:
>
> # Test for the AIX locale name.
> if (LC_ALL=ja_JP LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null;
> then
> gt_cv_locale_ja=ja_JP
>
> The comment refers to AIX, but it is in fact executed in the "*" case of a
> case statement, i.e., for everything other than Windows. The same code
> pattern also appears in the two other locale-*.m4 files.
>
> So it looks like that code needs some sort of guard checking for cross-build,
> and some sort of default action if so. I'm not particularly fluent in
> configure unfortunately.
>
> A quick look at the latest master shows that these files are unchanged by
> yesterday's update (other than copyright year).
>
> paul
>
- Re: Cross-build issues in gdb/gnulib,
Pedro Alves <=