error when config fcitx

katyush

./configure
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for gawk... gawk
checking whether make sets $(MAKE)... yes
checking build system type... i686-pc-linux-gnulibc1
checking host system type... i686-pc-linux-gnulibc1
checking for gcc... gcc
checking for C compiler default output file name... configure: error: C compiler cannot create executables


but why????