2.6.25-rc2, Problem running 'make install' as root with differentgcc

[Avi Kivity]

Trying to install a built 2.5.25-rc2 on a machine with a different gcc 
installed fails with

 LDS     arch/x86/vdso/vdso.lds
cc1: fatal error: opening output file arch/x86/vdso/vdso.lds: Permission 
denied
compilation terminated.
make[1]: *** [arch/x86/vdso/vdso.lds] Error 1
make: *** [vdso_install] Error 2

I believe this is due to arch/x86/vdso/.vdso.lds.cmd containing

cmd_arch/x86/vdso/vdso.lds := gcc -E -Wp,-MD,arch/x86/vdso/.vdso.lds.d  
-nostdinc -isystem /usr/lib/gcc/x86_64-redhat-linux/4.1.1/include 
-D__KERNEL__ -Iinclude  -include include/linux/autoconf.h   -P -C 
-D__ASSEMBLY__ -o arch/x86/vdso/vdso.lds arch/x86/vdso/vdso.lds.S

'-isystem /usr/lib/gcc/x86_64-redhat-linux/4.1.1/include' changes with 
the gcc version, triggering the recompilation attempt, which fails since 
my home directory is nfs mounted.

This didn't trigger with previous versions, and I have no idea how to 
fix it.

--
error compiling committee.c: too many arguments to function

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