[Bug bootstrap/64102] New: ARM bootstrap fails with segfault with -mapcs in BOOT_CFLAGS

[ktkachov at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64102

            Bug ID: 64102
           Summary: ARM bootstrap fails with segfault with -mapcs in
                    BOOT_CFLAGS
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
          Assignee: unassigned at gcc dot gnu.org
          Reporter: ktkachov at gcc dot gnu.org

I'm seeing a bootstrap segfault in stage2 on arm-none-linux-gnueabihf when
given BOOT_CFLAGS="-O2 -mapcs":

$BUILD/./gcc/xgcc -B$BUILD/./gcc/ -B$BUILD/armv7l-unknown-linux-gnueabihf/bin/
-B$BUILD/armv7l-unknown-linux-gnueabihf/lib/ -isystem
$BUILD/armv7l-unknown-linux-gnueabihf/include -isystem
$BUILD/armv7l-unknown-linux-gnueabihf/sys-include    -g -O2 -O2  -g -O2
-DIN_GCC    -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual
-Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition  -isystem
./include   -fPIC -fno-inline -g -DIN_LIBGCC2 -fbuilding-libgcc
-fno-stack-protector   -fPIC -fno-inline -I. -I. -I../.././gcc -I$SRC/libgcc
-I$SRC/libgcc/. -I$SRC/libgcc/../gcc -I$SRC/libgcc/../include  -DHAVE_CC_TLS 
-o _eprintf.o -MT _eprintf.o -MD -MP -MF _eprintf.dep -DL_eprintf -c
$SRC/libgcc/libgcc2.c -fvisibility=hidden -DHIDE_EXPORTS

$SRC/libgcc/libgcc2.c: In function '__eprintf':
$SRC/libgcc/libgcc2.c:2114:3: internal compiler error: Segmentation fault
   fprintf (stderr, string, expression, line, filename);
   ^
0x69c0cf crash_signal
        $SRC/gcc/toplev.c:359
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
(kyrtka01@pdtl-cb1)~/builds/gcc-bootstrap-apcs-clean/

This is based on r218090 with configuration:
--with-float=hard --with-cpu=cortex-a15 --with-mode=arm --with-fpu=neon-vfpv4
--enable-languages=c,c++,fortran

Bootstrap without -mapcs works fine.
I don't know if this is a regression, didn't try released compilers.

Can someone please confirm this?