Subject: Re: [RFC] building postgres with meson
From: Andrew Dunstan <andrew@dunslane.net>
To: Andres Freund <andres@anarazel.de>
Cc: pgsql-hackers@postgresql.org
References: <20211012083721.hvixq4pnh2pixr3j@alap3.anarazel.de>
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Message-ID: <87809c01-0e65-6c42-49e7-e8f2b02984f7@dunslane.net>
Date: Tue, 12 Oct 2021 15:16:56 -0400
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On 10/12/21 2:37 PM, Andrew Dunstan wrote:
> On 10/12/21 2:09 PM, Andres Freund wrote:
>> Hi,
>>
>> On 2021-10-12 09:59:26 -0700, Andres Freund wrote:
>>> On 2021-10-12 11:50:03 -0400, Andrew Dunstan wrote:
>>>> It hung because it expected the compiler to be 'ccache cc'. Hanging in
>>>> such a case is kinda unforgivable. I remedied that by setting 'CC=gcc'
>>>> but it then errored out looking for perl libs. I think msys2 is going to
>>>> be a bit difficult here :-(
>>> Hm. Yea, the perl thing is my fault - you should be able to get past it with
>>> -Dperl=disabled, and I'll take a look at fixing the perl detection. (*)
>> This is a weird one. I don't know much about msys, so it's probably related to
>> that. Perl spits out /usr/lib/perl5/core_perl/ as its archlibexp. According to
>> shell commands that exists, but not according to msys's own python
>>
>> $ /mingw64/bin/python -c "import os; p = '/usr/lib/perl5/core_perl/CORE'; print(f'does {p} exist:', os.path.exists(p))"
>> does /usr/lib/perl5/core_perl/CORE exist: False
>>
>> $ ls -ld /usr/lib/perl5/core_perl/CORE
>> drwxr-xr-x 1 anfreund anfreund 0 Oct 10 10:19 /usr/lib/perl5/core_perl/CORE
>
> Looks to me like a python issue:
>
>
> # perl -e 'my $p = "/usr/lib/perl5/core_perl/CORE"; print qq(does $p
> exist: ), -e $p, qq{\n};'
> does /usr/lib/perl5/core_perl/CORE exist: 1
>
> # python -c "import os; p = '/usr/lib/perl5/core_perl/CORE';
> print(f'does {p} exist:', os.path.exists(p))"
> does /usr/lib/perl5/core_perl/CORE exist: False
>
> # cygpath -m /usr/lib/perl5/core_perl/CORE
> C:/tools/msys64/usr/lib/perl5/core_perl/CORE
>
> # python -c "import os; p =
> 'C:/tools/msys64/usr/lib/perl5/core_perl/CORE'; print(f'does {p}
> exist:', os.path.exists(p))"
> does C:/tools/msys64/usr/lib/perl5/core_perl/CORE exist: True
>
>
> Clearly python is not understanding msys virtualized paths.


It's a matter of which python you use. The one that understands msys
paths is msys/python. The mingw64 packages are normally pure native
windows and so don't understand msys paths. I know it's confusing :-(


# /usr/bin/python -c "import os; p = '/usr/lib/perl5/core_perl/CORE';
print(f'does {p} exist:', os.path.exists(p))"
does /usr/lib/perl5/core_perl/CORE exist: True


cheers


andrew

--
Andrew Dunstan
EDB: https://www.enterprisedb.com