[Bug bootstrap/45177] New: [4.6 regression] cc1 runs out of memory building libgcc in ARM cross-compiler

["mikpe at it dot uu dot se" <gcc-bugzilla at gcc dot gnu dot org>]

Attempting to build gcc-4.6 r162856 (head as of a few minutes ago) on
i686-linux as a cross to armv5tel-linux-gnueabi fails with cc1 running out of
memory:

/tmp/objdir/./gcc/xgcc -B/tmp/objdir/./gcc/
-B/home/mikpe/pkgs/linux-x86/cross-armv5tel/armv5tel-unknown-linux-gnueabi/bin/
-B/home/mikpe/pkgs/linux-x86/cross-armv5tel/armv5tel-unknown-linux-gnueabi/lib/
-isystem
/home/mikpe/pkgs/linux-x86/cross-armv5tel/armv5tel-unknown-linux-gnueabi/include
-isystem
/home/mikpe/pkgs/linux-x86/cross-armv5tel/armv5tel-unknown-linux-gnueabi/sys-include
   -g -O2 -O2  -g -O2 -DIN_GCC -DCROSS_DIRECTORY_STRUCTURE  -W -Wall
-Wwrite-strings -Wcast-qual -Wstrict-prototypes -Wmissing-prototypes
-Wold-style-definition  -isystem ./include  -fPIC -Wno-missing-prototypes -g
-DHAVE_GTHR_DEFAULT -DIN_LIBGCC2 -D__GCC_FLOAT_NOT_NEEDED -Dinhibit_libc  -I.
-I. -I../.././gcc -I/tmp/gcc-4.6-r162856/libgcc -I/tmp/gcc-4.6-r162856/libgcc/.
-I/tmp/gcc-4.6-r162856/libgcc/../gcc -I/tmp/gcc-4.6-r162856/libgcc/../include 
-DHAVE_CC_TLS  -o _udivmoddi4.o -MT _udivmoddi4.o -MD -MP -MF _udivmoddi4.dep
-DL_udivmoddi4 -c /tmp/gcc-4.6-r162856/libgcc/../gcc/libgcc2.c \
          -fexceptions -fnon-call-exceptions 

cc1: out of memory allocating 171803424 bytes after a total of 46485504 bytes
make[2]: *** [_udivmoddi4.o] Error 1
make[2]: Leaving directory `/tmp/objdir/armv5tel-unknown-linux-gnueabi/libgcc'
make[1]: *** [all-target-libgcc] Error 2
make[1]: Leaving directory `/tmp/objdir'
make: *** [all] Error 2

This happend twice in a row now.  Repeating it a third time and watching the
process with 'top' I see that cc1 grows to somewhere over 2.5 GB virtual before
dying.  The machine has 6 GB of RAM and 4 GB of swap, but it didn't start
swapping before cc1 died.

4.6-20100731 (r162788) did not have this problem.

Full configuration line:
/tmp/gcc-4.6-r162856/configure --target=armv5tel-unknown-linux-gnueabi
--with-arch=armv5te --with-tune=xscale
--prefix=/home/mikpe/pkgs/linux-x86/cross-armv5tel
--with-gmp=/home/mikpe/pkgs/linux-x86/gmp-4.3.2
--with-mpfr=/home/mikpe/pkgs/linux-x86/mpfr-2.4.2
--with-mpc=/home/mikpe/pkgs/linux-x86/mpc-0.8.2 --disable-plugin --disable-lto
--disable-nls --disable-shared --disable-libmudflap --disable-multilib
--enable-threads=posix --enable-checking=release --enable-languages=c


-- 
           Summary: [4.6 regression] cc1 runs out of memory building libgcc
                    in ARM cross-compiler
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: mikpe at it dot uu dot se
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: armv5tel-unknown-linux-gnueabi


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45177