How to build libf2c?

[jw c]

Hello, all.
I want to build mn10300 fortran cross compiler and
library. The compiler(f771) was built successfully. 

But I get this error when building fortran library. 
Can someone tell me how to make fortran library?

Thank you.
-----------------------------------------------------
Configuring in mn10300-elf/libf2c
creating cache ./config.cache
checking if compiler f771 has been built... yes
checking for gcc...
/home/choijo/src/mn10300/build-gcc-mn10300-elf/gcc/xgcc
-B/home/choijo/src/mn10300/build-gcc-mn10300-elf/gcc/
-B/home/choijo/local/mn10300-elf/bin/
checking whether the C compiler
(/home/choijo/src/mn10300/build-gcc-mn10300-elf/gcc/xgcc
-B/home/choijo/src/mn10300/build-gcc-mn10300-elf/gcc/
-B/home/choijo/local/mn10300-elf/bin/ -g -O2 )
works... no
configure: error: installation or configuration
problem: C compiler cannot create executables.
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