dmd on ubuntu 64: how to unittest phobos with -m32?

[Andrei Alexandrescu via Digitalmars-d]

On 8/6/15 12:09 PM, Andrei Alexandrescu wrote:
> On 8/6/15 10:37 AM, rsw0x wrote:
>> On Thursday, 6 August 2015 at 14:18:09 UTC, Andrei Alexandrescu wrote:
>>> So I am trying to unittest phobos in its 32-bit build on a Ubuntu64
>>> machine. I installed these additional packages:
>>>
>>> sudo apt-get install libc6-dev-i386 libcurl3:i386
>>>
>>> When I try to unittest a phobos module, e.g.:
>>>
>>> make -f posix.mak MODEL=32 std/conv.test
>>>
>>> I get:
>>>
>>> /usr/bin/ld: cannot find -lcurl
>>>
>>> What do I need to do to link libcurl/32 properly on my 64-bit
>>> platform? I've searched around for a while, no avail.
>>>
>>>
>>> Thanks,
>>>
>>> Andrei
>>
>> do you have gcc-multilib and g++multilib? It probably includes some
>> necessary libraries for 32 bit compilation.
>
> Yes to the first. Just installed the second as well.
>
> In the meantime I figured I need this:
>
> sudo apt-get install libcurl4-openssl-dev:i386
>
> However, when I tried to install it, I got:
>
> dpkg: error processing archive
> /var/cache/apt/archives/libcurl4-openssl-dev_7.37.1-1ubuntu3.4_i386.deb
> (--unpack):
>   trying to overwrite shared '/usr/bin/curl-config', which is different
> from other instances of package libcurl4-openssl-dev:i386
>
> Does this mean libcurl cannot have both 32- and 64-bit builds installed
> on the same machine?

Update: I installed libcurl4-gnutls-dev:i386 instead. That seems to not 
conflict with libcurl4-openssl-dev and did go through. Subsequently 
things do seem to work. I've updated the intro:

http://wiki.dlang.org/Starting_as_a_Contributor#0._Prerequisites


Andrei