Re: Issue with cross compile and --64

[Jan Beulich <jbeulich@suse.com>]

On 21.03.2023 15:55, Matthew Stock wrote:
> Hi folks,
> 
> Looking for some guidance from folks on how to resolve a problem I'm
> running into.  Short version is that I have a custom 32-bit CPU core
> with a target for binutils, gcc and newlib target (hobby stuff).  I
> haven't updated the toolchain in about 9 months or so, and this time
> around it failed when building gcc, complaining that my cross-gas
> didn't recognize --64:
> 
> make[2]: Entering directory '/home/mstock/projects/gnutools/build/gcc/gcc'
> g++ -c   -g -O2     -DIN_GCC  -DCROSS_DIRECTORY_STRUCTURE
> -fno-exceptions -fno-rtti -fasynchronous-unwind-tables -W -Wall
> -Wno-narrowing -Wwrite-strings -Wcast-qual -Wmissing-format-attribute
> -Wconditionally-supported -Woverloaded-virtual -pedantic
> -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings
> -fno-common  -DHAVE_CONFIG_H  -DGENERATOR_FILE -I. -Ibuild
> -I../../../gcc/gcc -I../../../gcc/gcc/build
> -I../../../gcc/gcc/../include  -I../../../gcc/gcc/../libcpp/include  \
>     -o build/genmodes.o ../../../gcc/gcc/genmodes.cc
> /home/mstock/cross/bexkat1-elf/bin/as: unrecognized option '--64'
> 
> Host and build are Linux, target is bexkat1-elf (custom).
> 
> For this group, my question: is this an issue with my gas port, or
> should I be looking at gcc?

I think a different question needs asking: Why is it your gas which
gets invoked? genmodes is a build tool, i.e. to be compiled for your
Linux environment. The compiler, when passing --64, expects (I guess)
to invoke an x86 gas (or whatever your build system is), which would
understand --64.

Jan