http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50044
Martin Lederhilger <m...@convergent-it.at> changed:
What |Removed |Added
----------------------------------------------------------------------------
Version|4.5.2 |4.6.1
--- Comment #7 from Martin Lederhilger <m...@convergent-it.at> 2011-08-16
13:17:44 UTC ---
I have also tried it with a newer version of gcc, but I receive the same
results. Information about the new gcc version is listed below:
Using built-in specs.
COLLECT_GCC=i686-mingw32-g++
COLLECT_LTO_WRAPPER=/home/martin/mingw-4.6.1/install-i686-pc-linux-gnu/libexec/gcc/i686-mingw32/4.6.1/lto-wrapper
Target: i686-mingw32
Configured with: ../configure --build=i686-pc-linux-gnu
--host=i686-pc-linux-gnu --target=i686-mingw32
--prefix=/home/martin/mingw-4.6.1/install-i686-pc-linux-gnu
--with-gmp=/home/martin/mingw-4.6.1/install-i686-pc-linux-gnu
--with-mpfr=/home/martin/mingw-4.6.1/install-i686-pc-linux-gnu
--with-mpc=/home/martin/mingw-4.6.1/install-i686-pc-linux-gnu
--with-ppl=/home/martin/mingw-4.6.1/install-i686-pc-linux-gnu
--with-cloog=/home/martin/mingw-4.6.1/install-i686-pc-linux-gnu
--enable-cloog-backend=isl --enable-threads=win32 --enable-tls
--enable-languages=c,c++
--with-sysroot=/home/martin/mingw-4.6.1/install-i686-pc-linux-gnu/i686-mingw32
--disable-win32-registry --enable-sjlj-exceptions --disable-libstdcxx-pch
--with-host-libstdcxx='-lstdc++ -lsupc++'
Thread model: win32
gcc version 4.6.1 (GCC)
I think I should use
extern template class INTERFACE A<int>;
in A.h, and then
template class A<int>;
to explicitly instantiate it in A.cpp.
Is my use of "extern template ..." right - in the meaning that I should specify
the attributes there? Does the warning "type attributes ignored after type is
already defined" just wants to protect me of having instances of the same type
with different attributes in one translation unit (if that is even possible)?
In general (not 100 % related to my problem) "extern template ..." would also
help me to have the same attributes on the type, if I used it in other
translation units as well - I could think that it makes problems (which version
should the linker use?) while linking if there are template instantiations with
different attributes (I got this enlightenment from bug #38175) - have I
understood this correctly?
Then since I should probably use "extern template ...", what should I do about
the undefined reference to the typeinfo? Could this be related to bug #21243?
Thank you,
Martin
