------- Comment #11 from ktietz at gcc dot gnu dot org 2010-05-18 14:22 ------- (In reply to comment #10) > Re-opening. It turns out that GCC fails to actually apply the dllexport > attribute to TLS control vars. So solving the binutils problem allows > auto-export of a TLS variable to work, but as auto-export gets disabled in the > presence of any explicit dllexport directives, this isn't an effective > solution. I believe the problem needs to be addressed in > config/i386/winnt.c#i386_pe_encode_section_info() >
I have doubts about the approach in winnt.c, but well maybe I am wrong here. I investigated for this issue and see the real issue in declaration cloning in varasm.c's emutls_decl- function, which simply doesn't copy attributes of the delaration, which then leads to issues about name-decoration. Also the DECL_DLLIMPORT_P has to be copied here, too (for import). -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44139
