icedtea7-2.1 - fails to build with gcc4.7

[Andreas Radke]

I've tried also latest hg-shot from 2.1 branch fails in ArchLinux:

g++ -DLINUX -D_GNU_SOURCE -DAMD64 -DPRODUCT -I. -I/build/src/icedtea7-2-1-ae30f070f936/openjdk/hotspot/src/share/vm/prims -I/build/src/icedtea7-2-1-ae30f070f936/openjdk/hotspot/src/share/vm -I/build/src/icedtea7-2-1-ae30f070f936/openjdk/hotspot/src/cpu/x86/vm -I/build/src/icedtea7-2-1-ae30f070f936/openjdk/hotspot/src/os_cpu/linux_x86/vm -I/build/src/icedtea7-2-1-ae30f070f936/openjdk/hotspot/src/os/linux/vm -I/build/src/icedtea7-2-1-ae30f070f936/openjdk/hotspot/src/os/posix/vm -I../generated -DHOTSPOT_RELEASE_VERSION="\"22.0-b10\"" -DHOTSPOT_BUILD_TARGET="\"product\"" -DHOTSPOT_BUILD_USER="\"nobody\"" -DHOTSPOT_LIB_ARCH=\"amd64\" -DJRE_RELEASE_VERSION="\"1.7.0_03-b147\"" -DHOTSPOT_VM_DISTRO="\"OpenJDK\"" -DDERIVATIVE_ID="\"IcedTea7 2.1.1pre\"" -DDISTRIBUTION_ID="\"Custom build (Sun May 20 15:47:41 UTC 2012)\"" -march=x86-64 -mtune=generic -O2 -pipe -fstack-protector --param=ssp-buffer-size=4 -D_FORTIFY_SOURCE=2 -DTARGET_OS_FAMILY_linux -DTARGET_ARCH_x86 -DTARGET_ARCH_MODEL_x86
 _64 -DTARGET_OS_ARCH_linux_x86 -DTARGET_OS_ARCH_MODEL_linux_x86_64 -DTARGET_COMPILER_gcc -DCOMPILER2 -DCOMPILER1  -fno-rtti -fno-exceptions -D_REENTRANT -fcheck-new -fvisibility=hidden -m64 -pipe -g -DTARGET_OS_FAMILY_linux -DTARGET_ARCH_x86 -DTARGET_ARCH_MODEL_x86_64 -DTARGET_OS_ARCH_linux_x86 -DTARGET_OS_ARCH_MODEL_linux_x86_64 -DTARGET_COMPILER_gcc -DCOMPILER2 -DCOMPILER1 -fpic -fno-rtti -fno-exceptions -D_REENTRANT -fcheck-new -fvisibility=hidden -m64 -pipe -g -O3 -fno-strict-aliasing -g -DVM_LITTLE_ENDIAN -D_LP64=1 -fno-omit-frame-pointer -Werror -Wpointer-arith -Wsign-compare    -c -MMD -MP -MF ../generated/dependencies/g1BlockOffsetTable.o.d -o g1BlockOffsetTable.o /build/src/icedtea7-2-1-ae30f070f936/openjdk/hotspot/src/share/vm/gc_implementation/g1/g1BlockOffsetTable.cpp 
In file included from /usr/include/string.h:642:0,
                 from /build/src/icedtea7-2-1-ae30f070f936/openjdk/hotspot/src/share/vm/utilities/globalDefinitions_gcc.hpp:35,
                 from /build/src/icedtea7-2-1-ae30f070f936/openjdk/hotspot/src/share/vm/utilities/globalDefinitions.hpp:29,
                 from /build/src/icedtea7-2-1-ae30f070f936/openjdk/hotspot/src/share/vm/utilities/debug.hpp:29,
                 from /build/src/icedtea7-2-1-ae30f070f936/openjdk/hotspot/src/share/vm/runtime/globals.hpp:28,
                 from /build/src/icedtea7-2-1-ae30f070f936/openjdk/hotspot/src/share/vm/memory/allocation.hpp:28,
                 from /build/src/icedtea7-2-1-ae30f070f936/openjdk/hotspot/src/share/vm/memory/iterator.hpp:28,
                 from /build/src/icedtea7-2-1-ae30f070f936/openjdk/hotspot/src/share/vm/memory/genOopClosures.hpp:28,
                 from /build/src/icedtea7-2-1-ae30f070f936/openjdk/hotspot/src/share/vm/oops/klass.hpp:28,
                 from /build/src/icedtea7-2-1-ae30f070f936/openjdk/hotspot/src/share/vm/runtime/handles.hpp:28,
                 from /build/src/icedtea7-2-1-ae30f070f936/openjdk/hotspot/src/share/vm/code/oopRecorder.hpp:28,
                 from /build/src/icedtea7-2-1-ae30f070f936/openjdk/hotspot/src/share/vm/asm/assembler.hpp:28,
                 from /build/src/icedtea7-2-1-ae30f070f936/openjdk/hotspot/src/share/vm/precompiled.hpp:29:
In function 'void* memset(void*, int, size_t)',
    inlined from 'void G1BlockOffsetSharedArray::_ZN24G1BlockOffsetSharedArray16set_offset_arrayEmmh.isra.72(unsigned char*, size_t, size_t, unsigned char)' at /build/src/icedtea7-2-1-ae30f070f936/openjdk/hotspot/src/share/vm/gc_implementation/g1/g1BlockOffsetTable.hpp:169:52,
    inlined from 'void G1BlockOffsetArray::set_remainder_to_point_to_start_incl(size_t, size_t)' at /build/src/icedtea7-2-1-ae30f070f936/openjdk/hotspot/src/share/vm/gc_implementation/g1/g1BlockOffsetTable.cpp:195:67,
    inlined from 'void G1BlockOffsetArray::_ZN18G1BlockOffsetArray31set_remainder_to_point_to_startEP8HeapWordS1_.part.81(HeapWord*, HeapWord*)' at /build/src/icedtea7-2-1-ae30f070f936/openjdk/hotspot/src/share/vm/gc_implementation/g1/g1BlockOffsetTable.cpp:168:61,
    inlined from 'void G1BlockOffsetArray::set_remainder_to_point_to_start(HeapWord*, HeapWord*)' at /build/src/icedtea7-2-1-ae30f070f936/openjdk/hotspot/src/share/vm/gc_implementation/g1/g1BlockOffsetTable.cpp:369:1,
    inlined from 'void G1BlockOffsetArray::alloc_block_work2(HeapWord**, size_t*, HeapWord*, HeapWord*)' at /build/src/icedtea7-2-1-ae30f070f936/openjdk/hotspot/src/share/vm/gc_implementation/g1/g1BlockOffsetTable.cpp:510:53,
    inlined from 'HeapWord* G1BlockOffsetArray::forward_to_block_containing_addr_slow(HeapWord*, HeapWord*, const void*)' at /build/src/icedtea7-2-1-ae30f070f936/openjdk/hotspot/src/share/vm/gc_implementation/g1/g1BlockOffsetTable.cpp:394:59:
/usr/include/bits/string3.h:82:32: error: call to '__warn_memset_zero_len' declared with attribute warning: memset used with constant zero length parameter; this could be due to transposed parameters [-Werror]
/usr/include/bits/string3.h:82:32: error: call to '__warn_memset_zero_len' declared with attribute warning: memset used with constant zero length parameter; this could be due to transposed parameters [-Werror]
/usr/include/bits/string3.h:82:32: error: call to '__warn_memset_zero_len' declared with attribute warning: memset used with constant zero length parameter; this could be due to transposed parameters [-Werror]
/usr/include/bits/string3.h:82:32: error: call to '__warn_memset_zero_len' declared with attribute warning: memset used with constant zero length parameter; this could be due to transposed parameters [-Werror]
/usr/include/bits/string3.h:82:32: error: call to '__warn_memset_zero_len' declared with attribute warning: memset used with constant zero length parameter; this could be due to transposed parameters [-Werror]
/usr/include/bits/string3.h:82:32: error: call to '__warn_memset_zero_len' declared with attribute warning: memset used with constant zero length parameter; this could be due to transposed parameters [-Werror]
cc1plus: all warnings being treated as errors
make[7]: *** [g1BlockOffsetTable.o] Error 1

gcc-Version 4.7.0 20120505 (prerelease) (GCC) 

What gcc fix am I missing?

-Andy