Cross Compiler target include directories

[rbmj <rbmj at verizon dot net>]

Hi all,

I have been working on building a cross compiler to vxWorks on a debian 
linux amd64 host.  My problem is that I am having difficulty getting the 
include directories to work correctly.  To work correctly, I need to 
have two include directories on the target: target/h, and 
target/h/wrn/coreip.  My configure command looks like this:

"$SRC/gcc-$GCC_VERSION/configure" \
        --prefix="$PREFIX" \
        --target=powerpc-wrs-vxworks \
        --with-gnu-as \
        --with-gnu-ld \
        --with-headers="$SRC/gccdist/WindRiver/vxworks-6.3/target/h" \
        --disable-shared \
        --disable-libssp \
        --disable-multilib \
        --with-float=hard \
        --enable-languages=c,c++ \
        --enable-threads=vxworks \
        --without-gconv \
        --disable-libgomp \
        --disable-nls \
        --disable-libmudflap \
        --with-cpu-PPC603

Right now I have to add target/h/wrn/coreip to the include path in 
target directories (like libstdc++).  I tried using CFLAGS and 
C_INCLUDE_PATH, but these would not work as they would also override the 
include path in host directories, so #include <stdio.h> had all SORTS of 
issues... namely that it was the wrong stdio!

And yes, I *am* building libstdc++.  I changed the configure script to 
build a static libstdc++ that I link into my kernel module so that I can 
take advantage of new features and then use objcopy to localize those 
symbols so they don't conflict with the kernel.  If this is a bad 
(stupid) idea then please tell me.

So back to my original problem.  I was looking for a way to specify the 
include directories for the target directories.  Right now I have to add 
symlinks to get everything to include correctly.

I also have a couple of changes (like maybe 3 lines of code) that I 
needed to add to libgcov and libstdc++ that I needed to do to get 
everything to compile correctly.  I assume I should send those to 
gcc-patches and libstdc++?

Finally, is there a way to enable a build of libstdc++ without manually 
changing the configure script?

Thanks!

--
rbmj