build uclinux error

dear all,

I executed the kernal config,the error information is below,could you help me?

[root@localhost linux-2.6.x]# make ARCH=nios2nommu CROSS_COMPILE=nios2-linux-uclibc- hwselect SYSPTF=cpu.ptf

no emulation specific options.

RUNNING hwselect

--- Please select which CPU you wish to build the kernel against:

(1) cpu_0 - Class: altera_nios2 Type: s Version: 5.0

Selection: 1

--- Please select a device to upload the kernel to:

(1) flash

Class: altera_avalon_cfi_flash

Size: 8388608 bytes

Selection: 1

--- Please select a device to execute kernel from:

(1) number_device_0

Class: number_device

Size: 4 bytes

(2) sdram

Class: altera_avalon_new_sdram_controller

Size: 8388608 bytes

Selection: 2

--- Summary using

PTF: cpu.ptf

CPU: cpu_0

Device to upload to: flash

Program memory to execute from: sdram

--- Settings written to /home/wangdengke/linux-2.6.x/arch/nios2nommu/hardware.mk

then execute :

[root@localhost linux-2.6.x]# make ARCH=nios2nommu CROSS_COMPILE=nios2-linux-uclibc- menuconfig

no emulation specific options.

CHK include/linux/version.h

UPD include/linux/version.h

SYMLINK include/asm -> include/asm-nios2nommu

no emulation specific options.

HOSTCC scripts/basic/fixdep

/bin/sh: line 1: gcc: command not found

make[2]: *** [scripts/basic/fixdep] Error 127

make[1]: *** [scripts_basic] Error 2

make: *** [include/linux/autoconf.h] Error 2