[Gdal-dev] MrSID Cross-Compiler Information

[William Kyngesburye]

Sounds cool.  No waiting for LizardTech to get crackin' on that GCC 4  
version of the libs.

But, are you sure that's CONFIG_LIBS?  That doesn't affect the GDAL  
build, just how other software links to GDAL.

Shouldn't that go in LIBS?


On Aug 22, 2005, at 4:14 PM, Bill Binko wrote:

> Hi everyone,
>
> I have some good news on this front.  After discussing this with  
> Frank, I
> went digging and found a way to link GDAL with a version of the  
> MrSID SDK
> that was built with a different version of GCC.
>
> This page gives the (very) gory details: http://gcc.gnu.org/ 
> onlinedocs/libstdc++/abi.html
>
> Bug basically, if you're having linking troubles that look like this:
>
>  ../.libs/libgdal.so: undefined reference to  
> `std::__default_alloc_template<true, 0>::allocate(unsigned int)'
>  ../.libs/libgdal.so: undefined reference to  
> `std::basic_string<wchar_t, std::char_traits<wchar_t>,  
> std::allocator<wchar_t> >::_Rep::_S_create(unsigned int,  
> std::allocator<wchar_t> const&)'
>
> You probably are running against a library linked with an older GCC  
> C++
> library.
>
> In the past the only solution known (at least to Frank and I) was  
> to build
> a version of GDAL using the same GCC version.  After reading the above
> link, I found that you can instead just manually force the linker  
> to link
> to both stdc++ libraries (assuming you have both on your system)
>
> So: to accomplish this, simply make the following change in  
> GDALmake.opt:
>
> CONFIG_LIBS     =       $(LIBGDAL)
>
> becomes
>
> CONFIG_LIBS     =       $(LIBGDAL) /usr/lib/libstdc++.so.5 /usr/lib/ 
> libstdc++.so.6
>
> A clean rebuild should solve your link errors.  I am interested to  
> see how
> people do with this, so please contact me with any issues.
>
> Bill
>
>
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>

-----
William Kyngesburye <kyngchaos at kyngchaos.com>
http://www.kyngchaos.com/

"Oh, look, I seem to have fallen down a deep, dark hole.  Now what  
does that remind me of?  Ah, yes - life."

- Marvin