cbuild successfully built this on x86_64-natty-cbuild259-oort1-x86_64r1.

The build results are available at:
 http://ex.seabright.co.nz/build/gcc-linaro-4.7+bzr114970~ams-codesourcery~merge-from-fsf-4.7-20120229/logs/x86_64-natty-cbuild259-oort1-x86_64r1

+PASS: g++.dg/cpp0x/lambda/lambda-err1.C -std=c++11  (test for errors, line 7)
+PASS: g++.dg/cpp0x/lambda/lambda-err1.C -std=c++11 (test for excess errors)
+UNSUPPORTED: g++.dg/cpp0x/lambda/lambda-err1.C -std=c++98
+PASS: g++.dg/debug/dwarf2/pr52260.C (test for excess errors)
+PASS: g++.dg/ext/attrib43.C -std=c++11  (test for warnings, line 5)
+PASS: g++.dg/ext/attrib43.C -std=c++11 (test for excess errors)
+PASS: g++.dg/ext/attrib43.C -std=c++98  (test for warnings, line 5)
+PASS: g++.dg/ext/attrib43.C -std=c++98 (test for excess errors)
+PASS: g++.dg/ext/timevar1.C -std=gnu++11  (test for errors, line 11)
+PASS: g++.dg/ext/timevar1.C -std=gnu++11 (test for excess errors)
+PASS: g++.dg/ext/timevar1.C -std=gnu++98  (test for errors, line 11)
+PASS: g++.dg/ext/timevar1.C -std=gnu++98 (test for excess errors)
+PASS: g++.dg/ipa/pr51929.C -std=gnu++11 (test for excess errors)
+PASS: g++.dg/ipa/pr51929.C -std=gnu++98 (test for excess errors)
+PASS: g++.dg/lto/pr52400 cp_lto_pr52400_0.o assemble, -O0 -flto -flto-partition=1to1 -fno-use-linker-plugin
+PASS: g++.dg/lto/pr52400 cp_lto_pr52400_0.o assemble, -O0 -flto -flto-partition=none -fuse-linker-plugin
+PASS: g++.dg/lto/pr52400 cp_lto_pr52400_0.o assemble, -O0 -flto -fuse-linker-plugin -fno-fat-lto-objects
+PASS: g++.dg/lto/pr52400 cp_lto_pr52400_0.o assemble, -O2 -flto -flto-partition=1to1 -fno-use-linker-plugin
+PASS: g++.dg/lto/pr52400 cp_lto_pr52400_0.o assemble, -O2 -flto -flto-partition=none -fuse-linker-plugin -fno-fat-lto-objects
+PASS: g++.dg/lto/pr52400 cp_lto_pr52400_0.o assemble, -O2 -flto -fuse-linker-plugin
+PASS: g++.dg/lto/pr52400 cp_lto_pr52400_0.o-cp_lto_pr52400_0.o execute -O0 -flto -flto-partition=1to1 -fno-use-linker-plugin
+PASS: g++.dg/lto/pr52400 cp_lto_pr52400_0.o-cp_lto_pr52400_0.o execute -O0 -flto -flto-partition=none -fuse-linker-plugin
+PASS: g++.dg/lto/pr52400 cp_lto_pr52400_0.o-cp_lto_pr52400_0.o execute -O0 -flto -fuse-linker-plugin -fno-fat-lto-objects
+PASS: g++.dg/lto/pr52400 cp_lto_pr52400_0.o-cp_lto_pr52400_0.o execute -O2 -flto -flto-partition=1to1 -fno-use-linker-plugin
+PASS: g++.dg/lto/pr52400 cp_lto_pr52400_0.o-cp_lto_pr52400_0.o execute -O2 -flto -flto-partition=none -fuse-linker-plugin -fno-fat-lto-objects
+PASS: g++.dg/lto/pr52400 cp_lto_pr52400_0.o-cp_lto_pr52400_0.o execute -O2 -flto -fuse-linker-plugin
+PASS: g++.dg/lto/pr52400 cp_lto_pr52400_0.o-cp_lto_pr52400_0.o link, -O0 -flto -flto-partition=1to1 -fno-use-linker-plugin
+PASS: g++.dg/lto/pr52400 cp_lto_pr52400_0.o-cp_lto_pr52400_0.o link, -O0 -flto -flto-partition=none -fuse-linker-plugin
+PASS: g++.dg/lto/pr52400 cp_lto_pr52400_0.o-cp_lto_pr52400_0.o link, -O0 -flto -fuse-linker-plugin -fno-fat-lto-objects
+PASS: g++.dg/lto/pr52400 cp_lto_pr52400_0.o-cp_lto_pr52400_0.o link, -O2 -flto -flto-partition=1to1 -fno-use-linker-plugin
+PASS: g++.dg/lto/pr52400 cp_lto_pr52400_0.o-cp_lto_pr52400_0.o link, -O2 -flto -flto-partition=none -fuse-linker-plugin -fno-fat-lto-objects
+PASS: g++.dg/lto/pr52400 cp_lto_pr52400_0.o-cp_lto_pr52400_0.o link, -O2 -flto -fuse-linker-plugin
+PASS: g++.dg/template/asmgoto1.C -std=c++11 (test for excess errors)
+PASS: g++.dg/template/asmgoto1.C -std=c++98 (test for excess errors)
+PASS: g++.dg/template/using21.C -std=c++11 (test for excess errors)
+PASS: g++.dg/template/using21.C -std=c++98 (test for excess errors)
+PASS: g++.dg/template/using22.C -std=c++11  (test for errors, line 11)
+PASS: g++.dg/template/using22.C -std=c++11  (test for errors, line 16)
+PASS: g++.dg/template/using22.C -std=c++11  (test for errors, line 21)
+PASS: g++.dg/template/using22.C -std=c++11  (test for errors, line 26)
+PASS: g++.dg/template/using22.C -std=c++11 (test for excess errors)
+PASS: g++.dg/template/using22.C -std=c++98  (test for errors, line 11)
+PASS: g++.dg/template/using22.C -std=c++98  (test for errors, line 16)
+PASS: g++.dg/template/using22.C -std=c++98  (test for errors, line 21)
+PASS: g++.dg/template/using22.C -std=c++98  (test for errors, line 26)
+PASS: g++.dg/template/using22.C -std=c++98 (test for excess errors)
+PASS: gcc.c-torture/compile/pr52255.c  -O0  (test for excess errors)
+PASS: gcc.c-torture/compile/pr52255.c  -O1  (test for excess errors)
+PASS: gcc.c-torture/compile/pr52255.c  -O2  (test for excess errors)
+PASS: gcc.c-torture/compile/pr52255.c  -O2 -flto -fno-use-linker-plugin -flto-partition=none  (test for excess errors)
...and 203 more

The full diff is at:
 http://ex.seabright.co.nz/build/gcc-linaro-4.7+bzr114970~ams-codesourcery~merge-from-fsf-4.7-20120229/logs/x86_64-natty-cbuild259-oort1-x86_64r1/testsuite-diff.txt

The full testsuite results are at:
 http://ex.seabright.co.nz/build/gcc-linaro-4.7+bzr114970~ams-codesourcery~merge-from-fsf-4.7-20120229/logs/x86_64-natty-cbuild259-oort1-x86_64r1/gcc-testsuite.txt

cbuild-checked: x86_64-natty-cbuild259-oort1-x86_64r1