Subject: Re: [Boost-build] msvc: shared objects and static libs problem
From: Karsten Ahnert (karsten.ahnert_at_[hidden])
Date: 2012-01-30 06:52:22
On 01/30/2012 11:51 AM, Jaros³aw Bober wrote:
> Good to hear :)
> You could also link statically for example:
Yes, I know. Actually the project consisted of static libraries before.
Now, we have shared libraries for Linux. Porting everything to work with
windows-dlls will be time-consuming. As workaround I added
to the project requirements.
> lib some_lib : some_source.cpp<link>static ;
> Which could be simpler but would also extend you linking time if you
> plan to do big project.
> W dniu 30 stycznia 2012 11:34 u¿ytkownik Karsten Ahnert
> <karsten.ahnert_at_[hidden] <mailto:karsten.ahnert_at_[hidden]>> napisa³:
> Ok, thank you! That solved the problem. I only had to use _WIN32 in
> There is also a boost preprocessor symbol for this declaration:
> On 01/30/2012 10:31 AM, Jaros³aw Bober wrote:
> > 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]
> > <mailto: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]
> >> <mailto: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]
> >>> <mailto: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
> >>> I attached a small self contained example. Any ideas how
> >>> I can fix this?
> >>> Thank you,
> >>> Karsten
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