Corinna Vinschen wrote:
> I just built a gcc 4.3.4 Linux->Cygwin cross compiler using the sources
> from the Cygwin 1.7 distro. I used the following build flags:
>
> --disable-bootstrap --enable-version-specific-runtime-libs \
> --enable-static --enable-shared --enable-shared-libgcc \
> --disable-__cxa_atexit --with-gnu-ld --with-gnu-as --with-dwarf2 \
> --disable-sjlj-exceptions --enable-languages=c,c++ --disable-symvers \
> --enable-threads=posix --with-arch=i686 --with-tune=generic \
> --with-newlib
^^^^^^^^^^^^^^
Are you doing something tricky w.r.t. the headers and libs you supply to the
build process? You appear to be using none-at-all out of --with-headers,
--with-includes and --with-sysroot.
> When I try to build Cygwin I get:
>
> cc1plus: error: command line option '-muse-libstdc-wrappers' is not
> supported by this configuration
>
> What am I doing wrong?
Take a look in $objdir/gcc/config.log; what happened during the "checking
for __wrap__Znaj" test? Hmmmmm, I may have the config set up wrong so it only
works in bootstrap, not crossbuilds. You could try manually hacking
"-DUSE_CYGWIN_LIBSTDCXX_WRAPPERS=1" into the CFLAGS. Meanwhile, I need to go
figure out how to make sure and check the target rather than host libraries
for the presence of a function. (It's worth adding fixing this to the to-do
list for -2).
cheers,
DaveK
