https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110789
--- Comment #9 from Xi Ruoyao <xry111 at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #7)
> If you compile GMP (MPFR and MPC) as part of GCC build rather than
> seperately, the build will do the correct thing and not use the "native"
> options by default.
>
>
> You could also configure GMP using --target=none-linux-gnu
> --host=none-linux-gnu --build=none-linux-gnu to disable that similar thing
> (just as building GMP as part of GCC's build).
>
> From Makefile.def:
> host_modules= { module= gmp; lib_path=.libs; bootstrap=true;
> // Work around in-tree gmp configure bug with missing flex.
> extra_configure_flags='--disable-shared LEX="touch lex.yy.c"
> @host_libs_picflag@';
> extra_make_flags='AM_CFLAGS="-DNO_ASM"';
> no_install= true;
> // none-*-* disables asm optimizations, bootstrap-testing
> // the compiler more thoroughly.
> host="none-${host_vendor}-${host_os}";
> // gmp's configure will complain if given anything
> // different from host for target.
> target="none-${host_vendor}-${host_os}"; };
FWIW when I try this, configure script says:
configure: WARNING: the "none" host is obsolete, use --disable-assembly
So I'll change the LFS book to use --disable-assembly instead of these fancy
"cp configfsf" things. Not sure if we should use --disable-assembly too for
GCC in-tree GMP (I don't know which the first version of GMP supports
--disable-assembly).
