How to check whether blas/lapack/atlas is built with g77 or gfortran?

[Peng Yu]

Hi,

http://docs.scipy.org/doc/numpy/user/install.html#fortran-abi-mismatch

The above URL says the following " In particular, if your
blas/lapack/atlas is built with g77, you must use g77 when building
numpy and scipy; on the contrary, if your atlas is built with
gfortran, you must build numpy/scipy with gfortran. "

But I'm not sure how to figure out whether g77 or gfortran is used to
compile blas/lapack/atlas on ubuntu. Could anybody let me know?
Thanks.

-- 
Regards,
Peng