-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 12/4/2010 06:57, Larry Robinson wrote: > I'm trying to install the w64 compiler on a Ubuntu Linux machine, > following the instructions at: > http://sourceforge.net/apps/trac/mingw-w64/wiki/Cross Win32 and Win64 > compiler > > I am unable to build the shared 64 bit libgcc_s_sjlj-1.dll > > Tracking down the problem, it seems that the compiler emits symbols with > a leading underscore, but attempts to export those symbols without the > leading underscore in 64 bit mode (The 32-bit libgcc_s_sjlj-1.dll was > built with no problems). All exports fail with a message like: > > Cannot export _Unwind_Backtrace: symbol not defined. > > Using x86_64-w64-mingw32-nm to examine the intermediate library > .../build/x86_64-w64-mingw32/libgcc/shlib/libgcc_s.a.tmp, I can see the > symbols: > > libgcc_s.a.tmp:d000001.o:0000000000000000 T __Unwind_Backtrace > libgcc_s.a.tmp:d000001.o:0000000000000000 I __imp___Unwind_Backtrace > > Apparently in 64 bit mode GCC-4.5.1 tries to export the symbols without > the leading underscore when building a dll, and then fails when it can't > find the symbol. > > Here's my configuration: > > GCC-4.5 exported from the 4.5 branch, Revision 167434 on 12/3/2010. > Binutils 2.20.1 > > configure -v --with-pkgversion='GCC Mingw-w64 cross compiler' > --{host,build}=x86_64-linux-gnu --target=x86_64-w64-mingw32 > --enable-multilib --enable-64bit > --{prefix,with-sysroot}=/usr/local/Mingw-w64 --enable-static > --enable-shared=libgcc --enable-fully-dynamic-string > --enable-languages=c --enable-libssp --with-host-libstdcxx="-lstdc++ > -lsupc++" --with-{gmp,mpfr,mpc,cloog,ppl}=/usr --with-gnu-ld > --with-system-zlib --disable-werror --enable-targets=all > --enable-threads=win32 --enable-lto >
Hi, your binutils is too old, use the cvs version instead, or wait for the next release. GCC-4.5.0 and GCC 4.5.X ABI changed for win64. The latter is now using msvc compatible symbols. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.16 (MingW32) iEYEARECAAYFAkz5nVMACgkQp56AKe10wHdICACfeIGCJajhyZYoQkFXCtlTqt0z yY0AoIGKCRy/OPghiehMI/x/+wgSuXZ4 =PSiA -----END PGP SIGNATURE-----
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