[Gdal-dev] MrSID Cross-Compiler Information

[Bill Binko]

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