https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127806
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
multi-do:
@if [ -z "$(MULTIDIRS)" ]; then \
true; \
else \
rootpre=`${PWD_COMMAND}`/; export rootpre; \
srcrootpre=`cd $(srcdir); ${PWD_COMMAND}`/; export srcrootpre; \
lib=`echo "$${rootpre}" | sed -e 's,^.*/\([^/][^/]*\)/$$,\1,'`; \
compiler="$(CC)"; \
for i in `$${compiler} --print-multi-lib 2>/dev/null`; do \
dir=`echo $$i | sed -e 's/;.*$$//'`; \
if [ "$${dir}" = "." ]; then \
true; \
else \
if [ -d ../$${dir}/$${lib} ]; then \
flags=`echo $$i | sed -e 's/^[^;]*;//' -e 's/@/ -/g'`; \
libsuffix_=`$${compiler} $${flags} --print-multi-os-directory`;
\
if (cd ../$${dir}/$${lib}; $(MAKE) $(subst \
-B$(build_tooldir)/lib/, \
-B$(build_tooldir)/lib/$${libsuffix_}/, \
$(FLAGS_TO_PASS)) \
CFLAGS="$(CFLAGS) $${flags}" \
CCASFLAGS="$(CCASFLAGS) $${flags}" \
...
$(DO)); then \
true; \
else \
exit 1; \
fi; \
else true; \
fi; \
fi; \
done; \
fi
is the primary thing to try to parallelize I guess (except the primary multilib
is still built separately from this, so parallelizing this will help only for
2+ multilibs).
This comes from config-ml.in. One would probably need to add
multi-do-{1,2,3,4,5,6,...} goals, figure out at config-ml.in invocation time
the upper bound of number of multilibs (or at runtime), have multi-do: have
dependencies on the individual multi-do-{1,2,3,4,5...} goals and have each one
just pick the nth multilib or something similar.
