[Bug target/111060] New: [14 Regression] i686-linux bootstrap failure: i686-unknown-linux-gnu/libstdc++-v3/include/limits:1986:1: error: SSE register return with SSE2 disabled

[slyfox at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111060

            Bug ID: 111060
           Summary: [14 Regression] i686-linux bootstrap failure:
                    i686-unknown-linux-gnu/libstdc++-v3/include/limits:198
                    6:1: error: SSE register return with SSE2 disabled
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: slyfox at gcc dot gnu.org
  Target Milestone: ---

Noticed bootstrap failure on r14-3320-g7f8d730a563983 today:

$ ~/dev/git/gcc/configure --build=i686-unknown-linux-gnu
--host=i686-unknown-linux-gnu --target=i686-unknown-linux-gnu && make
...
/tmp/gb/./gcc/xgcc -shared-libgcc -B/tmp/gb/./gcc -nostdinc++
-L/tmp/gb/i686-unknown-linux-gnu/libstdc++-v3/src
-L/tmp/gb/i686-unknown-linux-gnu/libstdc++-v3/src/.libs
-L/tmp/gb/i686-unknown-linux-gnu/libstdc++-v3/libsupc++/.libs
-B/usr/local/i686-unknown-linux-gnu/bin/
-B/usr/local/i686-unknown-linux-gnu/lib/ -isystem
/usr/local/i686-unknown-linux-gnu/include -isystem
/usr/local/i686-unknown-linux-gnu/sys-include   -fno-checking -x c++-header
-nostdinc++ -g -O2 -D_GNU_SOURCE 
-I/tmp/gb/i686-unknown-linux-gnu/libstdc++-v3/include/i686-unknown-linux-gnu
-I/tmp/gb/i686-unknown-linux-gnu/libstdc++-v3/include
-I/home/slyfox/dev/git/gcc/libstdc++-v3/libsupc++  -O2 -g -std=gnu++0x
/home/slyfox/dev/git/gcc/libstdc++-v3/include/precompiled/stdc++.h \
-o i686-unknown-linux-gnu/bits/stdc++.h.gch/O2ggnu++0x.gch
In file included from
/home/slyfox/dev/git/gcc/libstdc++-v3/include/precompiled/stdc++.h:55:
/tmp/gb/i686-unknown-linux-gnu/libstdc++-v3/include/limits: In static member
function 'static constexpr _Float16 std::numeric_limits<_Float16>::min()':
/tmp/gb/i686-unknown-linux-gnu/libstdc++-v3/include/limits:1986:1: error: SSE
register return with SSE2 disabled