[mapguide-internals] mapguide 2 trunk cmake patches andinstructions - with links instead of patches

[Zac Spitzer]

Helio,

Are able to get a working build with these underlying issues present?

z


On Fri, Oct 24, 2008 at 7:56 AM, Helio Chissini de Castro <helio at kde.org>wrote:

> On Quinta 23 Outubro 2008 17:34:22 Helio Chissini de Castro wrote:
> > Hi
> >
> > Except for Geos one, most of the changes of headers are done due new gcc
> > been more restrictive on their requires ( not confuse with -pedantic )
> and
> > i prefer avoid use flag to "compat" old code, enabling me to fix this
> > compile issues.
> >
> > But i even avoid now to use the most common new flags used in distros
> > today, like --as-needed and --no-undefined
> >
> > Believe me, we will have some unpleasant surprises if you add this ones
> ion
> > current mg build :-(
> >
> > []'s
>
> Just for clarify what i means about unpleasant surprises, a quick example,
> compiling with -Wl, --as-needed and -Wl,--no-undefined in linker flags we
> fall
> in:
>
> ...
> Linking CXX shared library libMgServerTileService.so
> CMakeFiles/MgServerTileService.dir/ServerTileServiceBuild.cpp.o: In
> function
> `MgServerTileService::ClearMapCache(std::basic_string<wchar_t,
> std::char_traits<wchar_t>, std::allocator<wchar_t> > const&)':
> ServerTileServiceBuild.cpp:(.text+0x5db): undefined reference to
> `MgLogManager::GetInstance()'
>
> libMgServerTileService need MgLogManager, which is part of
> libMgServerManager,
> so lets add that as depends
>
> compiling again
> ....
> Scanning dependencies of target MgServerManager
> Linking CXX shared library libMgServerManager.so
> CMakeFiles/MgServerManager.dir/ServerManagerBuild.cpp.o: In function
>
> `MgServiceManager::NotifyTileServiceOnResourcesChanged(MgSerializableCollection*,
> bool)':
> ServerManagerBuild.cpp:(.text+0x282f1): undefined reference to `typeinfo
> for
> MgServerTileService'
> CMakeFiles/MgServerManager.dir/ServerManagerBuild.cpp.o: In function
>
> `MgServiceManager::NotifyFeatureServiceOnResourcesChanged(MgSerializableCollection*,
> bool)':
>
> And now we see that libMgServerManager depends on MgServerTileService
>
> A cyclic dependency between two shared libs
> Mg is working today because is using blind compilation for symbols assuming
> that will be there after everything is finished, but if you just tweak
> right
> flags, we fall in this design flaw.
>
> The pratical solution would be static libraries, but then we will need do
> whole mg static :-(
>
> --
> Helio Chissini de Castro
> KDE Project
> Brasil and South America Primary Contact
> _______________________________________________
> mapguide-internals mailing list
> mapguide-internals at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/mapguide-internals
>



-- 
Zac Spitzer -
http://zacster.blogspot.com (My Blog)
+61 405 847 168