_MIPS_SIM 在那里被定义的呢??

kendyke

mips linux src中
文件Unistd.h (include\asm-mips)        42529        2009-10-22
中
#if _MIPS_SIM == _MIPS_SIM_ABI32
中的_MIPS_SIM
不知道 在那里定义的?
编译时候也没有见定义哦.如下make V=1
mips-linux-gnu-gcc -Wp,-MD,arch/mips/kernel/.scall32-o32.o.d  -nostdinc -isystem /root/CodeSourcery/Sourcery_G++_Lite/bin/../lib/gcc/mips-linux-gnu/4.3.3/include -D__KERNEL__ -Iinclude  -I/usr/src/linux-2.6.27.29/arch/mips/include -include include/linux/autoconf.h -D__ASSEMBLY__ -ffunction-sections -mabi=32 -G 0 -mno-abicalls -fno-pic -pipe -msoft-float -ffreestanding -EL -UMIPSEB -U_MIPSEB -U__MIPSEB -U__MIPSEB__ -UMIPSEL -U_MIPSEL -U__MIPSEL -U__MIPSEL__ -DMIPSEL -D_MIPSEL -D__MIPSEL -D__MIPSEL__ -march=mips32r2 -Wa,-mips32r2 -Wa,--trap -Iinclude/asm-mips/mach-am-mips -Iinclude/asm-mips/mach-generic     -c -o arch/mips/kernel/scall32-o32.o arch/mips/kernel/scall32-o32.S