cbuild successfully built this on i686-natty-cbuild211-oort2-i686r1.

The build results are available at:
 http://ex.seabright.co.nz/build/gcc-linaro-4.6+bzr106846~ams-codesourcery~merge-from-fsf-4.6-20111201/logs/i686-natty-cbuild211-oort2-i686r1

+PASS: g++.dg/cpp0x/decltype35.C (test for excess errors)
+PASS: g++.dg/cpp0x/decltype36.C (test for excess errors)
+PASS: g++.dg/cpp0x/pr50901.C (test for excess errors)
+PASS: g++.dg/cpp0x/pr51150.C  (test for errors, line 15)
+PASS: g++.dg/cpp0x/pr51150.C  (test for errors, line 17)
+PASS: g++.dg/cpp0x/pr51150.C (test for excess errors)
+PASS: g++.dg/other/offsetof7.C (test for excess errors)
+PASS: gcc.c-torture/compile/20110913-1.c  -O0  (test for excess errors)
+PASS: gcc.c-torture/compile/20110913-1.c  -O1  (test for excess errors)
+PASS: gcc.c-torture/compile/20110913-1.c  -O2  (test for excess errors)
+PASS: gcc.c-torture/compile/20110913-1.c  -O2 -flto  (test for excess errors)
+PASS: gcc.c-torture/compile/20110913-1.c  -O2 -flto -flto-partition=none  (test for excess errors)
+PASS: gcc.c-torture/compile/20110913-1.c  -O3 -fomit-frame-pointer  (test for excess errors)
+PASS: gcc.c-torture/compile/20110913-1.c  -O3 -g  (test for excess errors)
+PASS: gcc.c-torture/compile/20110913-1.c  -Os  (test for excess errors)
+PASS: gcc.c-torture/compile/pr51077.c  -O0  (test for excess errors)
+PASS: gcc.c-torture/compile/pr51077.c  -O1  (test for excess errors)
+PASS: gcc.c-torture/compile/pr51077.c  -O2  (test for excess errors)
+PASS: gcc.c-torture/compile/pr51077.c  -O2 -flto  (test for excess errors)
+PASS: gcc.c-torture/compile/pr51077.c  -O2 -flto -flto-partition=none  (test for excess errors)
+PASS: gcc.c-torture/compile/pr51077.c  -O3 -fomit-frame-pointer  (test for excess errors)
+PASS: gcc.c-torture/compile/pr51077.c  -O3 -fomit-frame-pointer -funroll-all-loops -finline-functions  (test for excess errors)
+PASS: gcc.c-torture/compile/pr51077.c  -O3 -fomit-frame-pointer -funroll-loops  (test for excess errors)
+PASS: gcc.c-torture/compile/pr51077.c  -O3 -g  (test for excess errors)
+PASS: gcc.c-torture/compile/pr51077.c  -Os  (test for excess errors)
+PASS: gcc.dg/delay-slot-2.c (test for excess errors)
+PASS: gcc.dg/delay-slot-2.c scan-assembler printf
+PASS: gfortran.dg/implicit_pure_1.f90  -O0  (test for excess errors)
+PASS: gfortran.dg/implicit_pure_1.f90  -O0  execution test
+PASS: gfortran.dg/implicit_pure_1.f90  -O0  scan-module IMPLICIT_PURE
+PASS: gfortran.dg/implicit_pure_1.f90  -O1  (test for excess errors)
+PASS: gfortran.dg/implicit_pure_1.f90  -O1  execution test
+PASS: gfortran.dg/implicit_pure_1.f90  -O1  scan-module IMPLICIT_PURE
+PASS: gfortran.dg/implicit_pure_1.f90  -O2  (test for excess errors)
+PASS: gfortran.dg/implicit_pure_1.f90  -O2  execution test
+PASS: gfortran.dg/implicit_pure_1.f90  -O2  scan-module IMPLICIT_PURE
+PASS: gfortran.dg/implicit_pure_1.f90  -O3 -fomit-frame-pointer  (test for excess errors)
+PASS: gfortran.dg/implicit_pure_1.f90  -O3 -fomit-frame-pointer  execution test
+PASS: gfortran.dg/implicit_pure_1.f90  -O3 -fomit-frame-pointer  scan-module IMPLICIT_PURE
+PASS: gfortran.dg/implicit_pure_1.f90  -O3 -fomit-frame-pointer -funroll-all-loops -finline-functions  (test for excess errors)
+PASS: gfortran.dg/implicit_pure_1.f90  -O3 -fomit-frame-pointer -funroll-all-loops -finline-functions  execution test
+PASS: gfortran.dg/implicit_pure_1.f90  -O3 -fomit-frame-pointer -funroll-all-loops -finline-functions  scan-module IMPLICIT_PURE
+PASS: gfortran.dg/implicit_pure_1.f90  -O3 -fomit-frame-pointer -funroll-loops  (test for excess errors)
+PASS: gfortran.dg/implicit_pure_1.f90  -O3 -fomit-frame-pointer -funroll-loops  execution test
+PASS: gfortran.dg/implicit_pure_1.f90  -O3 -fomit-frame-pointer -funroll-loops  scan-module IMPLICIT_PURE
+PASS: gfortran.dg/implicit_pure_1.f90  -O3 -g  (test for excess errors)
+PASS: gfortran.dg/implicit_pure_1.f90  -O3 -g  execution test
+PASS: gfortran.dg/implicit_pure_1.f90  -O3 -g  scan-module IMPLICIT_PURE
+PASS: gfortran.dg/implicit_pure_1.f90  -Os  (test for excess errors)
+PASS: gfortran.dg/implicit_pure_1.f90  -Os  execution test
...and 3 more

The full diff is at:
 http://ex.seabright.co.nz/build/gcc-linaro-4.6+bzr106846~ams-codesourcery~merge-from-fsf-4.6-20111201/logs/i686-natty-cbuild211-oort2-i686r1/testsuite-diff.txt

The full testsuite results are at:
 http://ex.seabright.co.nz/build/gcc-linaro-4.6+bzr106846~ams-codesourcery~merge-from-fsf-4.6-20111201/logs/i686-natty-cbuild211-oort2-i686r1/gcc-testsuite.txt

cbuild-checked: i686-natty-cbuild211-oort2-i686r1