Alguien me podria dar una pista, por que fallo la compilacion

p.o tree.o valtrack.o value-prof.o var-tracking.o varasm.o varpool.o vmsdbgout.o vtable-verify.o web.o wide-int.o wide-int-print.o xcoffout.o mips.o linux.o host-linux.o
ar: libbackend.a: No space left on device
make[5]: *** [libbackend.a] Error 1
make[5]: Leaving directory `/root/openwrt/openwrt/build_dir/toolchain-mips_mips32_gcc-5.3.0_musl-1.1.14/gcc-5.3.0-initial/gcc'
make[4]: *** [all-gcc] Error 2
make[4]: Leaving directory `/root/openwrt/openwrt/build_dir/toolchain-mips_mips32_gcc-5.3.0_musl-1.1.14/gcc-5.3.0-initial'
make[3]: *** [/root/openwrt/openwrt/build_dir/toolchain-mips_mips32_gcc-5.3.0_musl-1.1.14/gcc-5.3.0-initial/.built] Error 2
make[3]: Leaving directory `/root/openwrt/openwrt/toolchain/gcc/initial'
make[2]: *** [toolchain/gcc/initial/compile] Error 2
make[2]: Leaving directory `/root/openwrt/openwrt'
make[1]: *** [/root/openwrt/openwrt/staging_dir/toolchain-mips_mips32_gcc-5.3.0_musl-1.1.14/stamp/.toolchain_install] Error 2
make[1]: Leaving directory `/root/openwrt/openwrt'
make: *** [world] Error 2