Android ndk compile error, arm-linux-androideabi-gcc is not excutable

Question

I tried to build a app using andriod NDK

./waf configure -T debug --android=armeabi-v7a,4.9,21

but the compile failed with the error

config.log

Checking for 'gcc' (C compiler)
find program=['gcc', 'cc'] paths=['/home/kkw07054/android-ndk-r10e', '/home/kkw07054/bin', '/home/kkw07054/.local/bin', '/usr/local/sbin', '/usr/local/bin', '/usr/sbin', '/usr/bin', '/sbin', '/bin', '/usr/games', '/usr/local/games', '/snap/bin', '/home/kkw07054/android-ndk-$
from /home/kkw07054/source-engine: Program ['/home/kkw07054/android-ndk-r10e/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86/bin/arm-linux-androideabi-gcc'] is not executable
not found

how can i solve this?