Re: [Boost-build] msvc: shared objects and static libs problem

Subject: Re: [Boost-build] msvc: shared objects and static libs problem
From: Jaros³aw Bober (jaroslaw.bober_at_[hidden])
Date: 2012-01-30 04:31:28

Ahh sorry I didn't looked at your project before and assumed that you have
problem with boost itself. Yes, those flags are only for boost libs.

What you're trying to do is to make shared libs (this is the default
behaviour of boost-build), in linux it works out of the box.
In Windows however you have to declare export symbols with something like
this:

__declspec(dllexport) void tree_func( int a );

To support multiplatform you can do something like this:

#ifdef WIN32
#define EXPORTED __declspec(dllexport)
#else
#define EXPORTED
#endif

and then have your declaration:

EXPORTED void tree_func( int a );

Regards

2012/1/30 Karsten Ahnert <karsten.ahnert_at_[hidden]>

>  Ok, I also tried this. It does not work. I thought that BOOST_ALL_NO_LIBS
> is only for the boost libraries (filesystem, program_option, etc..).
>
> Am 30.01.2012 09:43, schrieb Jaros³aw Bober:
>
> The flag I was talking about is BOOST_ALL_NO_LIB not BOOST_ALL_NO_LIBS.
> You are right that this flags controll automatic linking. So when you do
> it manually, you're linking to shared libraries (unless you're directly
> linking to static version).
> But automatic linking wants static if you haven't declared
> BOOST_ALL_DYN_LINK somewhere.
> I had the same problem. Try this in jamroot:
>
> project :
>     requirements
>     <define>BOOST_ALL_NO_LIB
> ;
>
> Hope this helps.
>
> 2012/1/30 Karsten Ahnert <karsten.ahnert_at_[hidden]>
>
>>  I defined BOOST_ALL_NO_LIBS=1, but the problem is still the same. I
>> think BOOST_ALL_NO_LIBS controlls automatic linking of the boost libraries.
>> Any other ideas?
>>
>> Am 30.01.2012 09:05, schrieb Jaros³aw Bober:
>>
>> >From first sight it looks like you have automatic linking turned on.
>> This thing works only on windows, that's why you're fine on linux.
>> Perhaps you should turn this off by defining flag BOOST_ALL_NO_LIB.
>>
>> Regards
>>
>> 2012/1/28 Dr. Karsten Ahnert <karsten.ahnert_at_[hidden]>
>>
>>> Hi,
>>>
>>> I have a a project with several dynamic libraries and some applications.
>>> Some of these libraries depend on other libraries.
>>>
>>> In the Jamroot I created aliases to all libraries and in the Jamfiles
>>> for the single library I include all depend libraries via these aliases.
>>> This works fine on linux (boost 1.48) but does not work on Windows
>>> machines. The problem is that bjam tries to find the static versions of the
>>> depended libraries which have not been build:
>>>
>>> LINK : fatal error LNK1181: cannot open input file '*.lib'
>>>
>>> I attached a small self contained example. Any ideas how I can fix this?
>>>
>>> Thank you,
>>>
>>> Karsten
>>>
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