https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67728
--- Comment #11 from Andrew Roberts <andrewm.roberts at sky dot com> ---
On Native ARM platform the bootstrap does work with the old in tree GMP 4.3.2,
regardless of wether you use none-linux-gnu or armv7l-linux-gnu when
configuring GMP.
Bulding by patching toplevel Makefile to remove none- and replace with armv7l-
../gcc-6.0.0/configure ...
uname_m=`uname -m`
sed -i "s/none-/${uname_m}-/" Makefile
make
make install
Using:
gmp -> ../gmp-4.3.2
mpc -> ../mpc-0.8.1
mpfr -> ../mpfr-2.4.2 (plus latest patches to mpfr to 2.4.2)
isl -> ../isl-0.16.1
^ Builds Ok and compiles simple program (not bootstrapped due to time taken)
Using:
gmp -> ../gmp-4.3.2
mpc -> ../mpc-0.8.1
mpfr -> ../mpfr-2.4.2 (plus latest patches to mpfr 2.4.2)
isl -> ../isl-0.15 (download_prerequisites version)
^ Builds Ok and compiles simple program (not bootstrapped due to time taken)
Bulding by WITHOUT patching toplevel Makefile but with bootstrapping
../gcc-6.0.0/configure ... --enable-bootstrap
make bootstrap-lean
make install
Using:
gmp -> ../gmp-4.3.2
mpc -> ../mpc-0.8.1
mpfr -> ../mpfr-2.4.2 (plus latest patches to mpfr 2.4.2)
isl -> ../isl-0.15 (download_prerequisites version)
^ Builds and bootstraps Ok and compiles simple program
This is all as expected. But as noted the docs suggest later versions of GMP
are ok as well.
If the build was fixed to use correct CPU for configuring GMP it would build
with both old and new versions of GMP. If there are some specific tests which
would exercise the GMP/ISL parts of gcc I could give them a go as well, but
running the entire test suite would take forever due to the slow storage.
