RE: how could make gcc link static library default?

["Anandkumar, CB IN BLR STS" <anand.cb@siemens.com>]

Hi Terry,
        I agree that below mentioned step is needed when you are aware of type of library and this is need for interlinking static and dynamic library. But for the scenario you mentioned below then existing mechanism will do the trick. For example you have library named libfoo.so and libfoo.a in folder named /usr/lib/custom/ and you compile you program test.c to use this library.

        gcc -o test test.c -lfoo -L/usr/lib/custom

        Then first priority is given for dynamic in case dynamic does not exist it uses static.

With Regards,
Anand

-----Original Message-----
From: net_robber [mailto:net_robber@timectrl.net]
Sent: Thursday, October 17, 2013 12:09 PM
To: Terry Guo
Cc: Anandkumar, CB IN BLR STS; gcc-help@gcc.gnu.org
Subject: Re: how could make gcc link static library default?

thanks for your share,
but this is can be use in case you know what type of the library is.
could it be done by gcc auto??

On Thu, Oct 17, 2013 at 1:48 PM, Terry Guo <flameroc@gmail.com> wrote:
> On Thu, Oct 17, 2013 at 1:05 PM, Anandkumar, CB IN BLR STS
> <anand.cb@siemens.com> wrote:
>> Hi Terry,
>>         Normally dynamic is given more preference over static so this should work.
>>
>
> Got your point. Thanks.
>
> BR,
> Terry
>
>> With Regards,
>> Anand
>>
>> -----Original Message-----
>> From: Terry Guo [mailto:flameroc@gmail.com]
>> Sent: Thursday, October 17, 2013 10:09 AM
>> To: Anandkumar, CB IN BLR STS
>> Cc: net_robber@timectrl.net; gcc-help@gcc.gnu.org
>> Subject: Re: how could make gcc link static library default?
>>
>> On Thu, Oct 17, 2013 at 12:21 PM, Anandkumar, CB IN BLR STS <anand.cb@siemens.com> wrote:
>>> Hi,
>>>         You try both static and dynamic linking with following options with example mentioned below:
>>>         If you have want to compile a program test.c which is dependent on 2 static library foo1 and foo2 and one dynamic library foo3 then below mentioned command will do the trick.
>>>
>>>         gcc test.c -W1,-Bstatic -lfoo1 -lfoo2 -W1,-Bdynamic -lfoo3
>>> -o test
>>>
>>>
>>>         Try this trick on any number of static and dynamic libraries.
>>
>> Thanks for sharing and sorry for interrupting. I am thinking another similar scenario: sometimes the foo3 exists in dynamic library, sometimes it exists in static library. Is it possible to let gcc search the dynamic one first and then search the static one if dynamic doesn't exist? Does command like below works?
>>
>> gcc test.c -Wl,-Bdynamic -lfoo3 -Wl,-Bstatic -lfoo3 -o test
>>
>> And if both dynamic one and static exist, is it possible to let gcc choose the dynamic one over the static one or choose the static one over the dynamic one? Thanks.
>>
>> BR,
>> Terry
>>
>>>
>>> With Regards,
>>> Anand
>>>
>>> -----Original Message-----
>>> From: gcc-help-owner@gcc.gnu.org [mailto:gcc-help-owner@gcc.gnu.org]
>>> On Behalf Of net_robber
>>> Sent: Thursday, October 17, 2013 9:10 AM
>>> To: gcc-help@gcc.gnu.org
>>> Subject: how could make gcc link static library default?
>>>
>>> hi,
>>>
>>> i know a option -static to force gcc link static library, which will ignore shared library.
>>>  but in my case, some library just have shared library.
>>>  so, is want gcc linlk static library first, then shared library if
>>> static one was not found
>>>
>>> how to do that?