[fpc-devel] link search order

[Vittorio Giovara]

On 22/feb/2013, at 16:59, Tomas Hajny <XHajT03 at hajny.biz> wrote:

> On Fri, February 22, 2013 16:33, Vittorio Giovara wrote:
>
>
> Hi,
>
>> yes I was talking about linux. I didn't include much information because I
>> didn't want to confuse people with details.
>>
>> In this branch of Hedgewars
>> https://code.google.com/p/hedgewars/source/list?name=physfslayer we are
>> using physfs library version 2.1.0.
>> However many people out there have version 2.0.3 installed and (of course)
>> it doesn't contain many of the APIs present in 2.1.0.
>> So when libphysfs is not found (or an old one is detected) we provide a
>> copy of the right physfs and have CMake (our build system) compile and
>> install it. However even if I hardcode the right path of the right library
>> of the right version, the installed system library takes precedence, and
>> thus if another version of physfs is installed, hedgewars doesn't link any
>> more.
>>
>> I would refrain from using a different library name; looking at the
>> generated link.res file it seems that the first lib search path is
>> /urs/lib
>> and /lib and the custom one (where the right libphysfs resides) is found
>> only later on. Is there a way to prevent this? I tried to play with the
>> -Xd
>> flag but the result didn't change.
>
> I don't know enough about the library path setting (I leave commenting on
> this to others). However, if you require a specific version number of a
> library (and even distribute that version with your code), explicitly
> linking to that library version seems to be the appropriate solution from
> my point of view. Another option may be linking the respective library
>

As mentioned, I've been doing only static builds so far. Plus I passed
the linker (with -k) the full path of the library it should link, but
the system one is somehow always dragged in and linked before my
command takes effect.

Vittorio