[Bug bootstrap/94042] New: [10 Regression] Bootstrap fails on ppc-linux-gnu

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94042

            Bug ID: 94042
           Summary: [10 Regression] Bootstrap fails on ppc-linux-gnu
           Product: gcc
           Version: 10.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: bootstrap
          Assignee: unassigned at gcc dot gnu.org
          Reporter: marxin at gcc dot gnu.org
  Target Milestone: ---

Created attachment 47973
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47973&action=edit
Build log

Doing bootstrap on ppc-linux-gnu I see many ICEs when building libsupc+:

[ 3338s] libtool: compile: 
/home/abuild/rpmbuild/BUILD/gcc-10.0.1+git175037/obj-powerpc64-suse-linux/./gcc/xgcc
-shared-libgcc
-B/home/abuild/rpmbuild/BUILD/gcc-10.0.1+git175037/obj-powerpc64-suse-linux/./gcc
-nostdinc++
-L/home/abuild/rpmbuild/BUILD/gcc-10.0.1+git175037/obj-powerpc64-suse-linux/powerpc64-suse-linux/libstdc++-v3/src
-L/home/abuild/rpmbuild/BUILD/gcc-10.0.1+git175037/obj-powerpc64-suse-linux/powerpc64-suse-linux/libstdc++-v3/src/.libs
-L/home/abuild/rpmbuild/BUILD/gcc-10.0.1+git175037/obj-powerpc64-suse-linux/powerpc64-suse-linux/libstdc++-v3/libsupc++/.libs
-B/usr/powerpc64-suse-linux/bin/ -B/usr/powerpc64-suse-linux/lib/ -isystem
/usr/powerpc64-suse-linux/include -isystem
/usr/powerpc64-suse-linux/sys-include -fno-checking
-I/home/abuild/rpmbuild/BUILD/gcc-10.0.1+git175037/libstdc++-v3/../libgcc
-I/home/abuild/rpmbuild/BUILD/gcc-10.0.1+git175037/obj-powerpc64-suse-linux/powerpc64-suse-linux/libstdc++-v3/include/powerpc64-suse-linux
-I/home/abuild/rpmbuild/BUILD/gcc-10.0.1+git175037/obj-powerpc64-suse-linux/powerpc64-suse-linux/libstdc++-v3/include
-I/home/abuild/rpmbuild/BUILD/gcc-10.0.1+git175037/libstdc++-v3/libsupc++
-D_GLIBCXX_SHARED -fno-implicit-templates -Wall -Wextra -Wwrite-strings
-Wcast-qual -Wabi=2 -fdiagnostics-show-location=once -ffunction-sections
-fdata-sections -frandom-seed=bad_alloc.lo -O2 -D_FORTIFY_SOURCE=2
-funwind-tables -fasynchronous-unwind-tables -fstack-clash-protection
-Werror=return-type -g -U_FORTIFY_SOURCE -D_GNU_SOURCE -c
../../../../libstdc++-v3/libsupc++/bad_alloc.cc  -fPIC -DPIC -D_GLIBCXX_SHARED
-o bad_alloc.o
...
[ 3338s]
/home/abuild/rpmbuild/BUILD/gcc-10.0.1+git175037/obj-powerpc64-suse-linux/powerpc64-suse-linux/libstdc++-v3/include/type_traits:
In instantiation of 'struct std::integral_constant<bool, false>':
[ 3338s]
/home/abuild/rpmbuild/BUILD/gcc-10.0.1+git175037/obj-powerpc64-suse-linux/powerpc64-suse-linux/libstdc++-v3/include/type_traits:106:14:
  required from here
[ 3338s]
/home/abuild/rpmbuild/BUILD/gcc-10.0.1+git175037/obj-powerpc64-suse-linux/powerpc64-suse-linux/libstdc++-v3/include/type_traits:62:17:
internal compiler error: in iterative_hash_template_arg, at cp/pt.c:1915
[ 3338s]    62 |       constexpr operator value_type() const noexcept { return
value; }
[ 3338s]       |                 ^~~~~~~~
[ 3338s] make[5]: *** [Makefile:762: bad_alloc.lo] Error 1

I can't reproduce that with a cross compiler and I noticed that one needs to
bootstrap compiler. --disable-bootstrap seems fine. I don't have a handy
machine where I could reproduce that right now..