ttyp2:makoto@harry 23:46:53/040912(...checkout/src)> time sudo ./build.sh -u release > & ../log-simple-gcc-replace-u-MKGCC=yes
8276.995u 1895.504s 3:03:52.57 92.2% 0+0k 1003+240606io 21704pf+188w

cc -O2 -pipe -Werror -Wall -Wpointer-arith -Wstrict-prototypes -Wmissing-prototypes -Wno-uninitialized -Wno-main -Wno-format-zero-length -Wno-nonn
ull -msoft-float -fno-zero-initialized-in-bss -ffreestanding -I. -I/export/20040822/checkout/src/sys/arch -I/export/20040822/checkout/src/sys -nostd
inc -DDIAGNOSTIC -DMAXUSERS=32 -D_KERNEL -D_KERNEL_OPT -Dmacppc -c /export/20040822/checkout/src/sys/kern/kern_sa.c
/export/20040822/checkout/src/sys/kern/kern_sa.c: In function `sys_sa_setconcurrency':
/export/20040822/checkout/src/sys/kern/kern_sa.c:546: error: `CPU_INFO_ITERATOR' undeclared (first use in this function)
~
*** Failed command: cc -O2 -pipe -Werror -Wall -Wpointer-arith -Wstrict-prototypes -Wmissing-prototypes -Wno-uninitialized -Wno-main -Wno-format-zero
-length -Wno-nonnull -msoft-float -fno-zero-initialized-in-bss -ffreestanding -I. -I/export/20040822/checkout/src/sys/arch -I/export/20040822/checkou
t/src/sys -nostdinc -DDIAGNOSTIC -DMAXUSERS=32 -D_KERNEL -D_KERNEL_OPT -Dmacppc -c /export/20040822/checkout/src/sys/kern/kern_sa.c
*** Error code 1

Stop.
nbmake: stopped in /export/20040822/checkout/src/sys/arch/macppc/compile/GENERIC.MP

I got the error very recently, which I do not remember at all ;-(