Configure failure on Mac OS 10.6

[Michael D. Godfrey]

I made a first try at compiling on my 10.6 system with
current Xcode and recent unix tools and gfortran 4.5.
Using BLAS and LAPACK from Xcode and this gfortran
fails.  I get:
checking for sgemm_ in 
/System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/veclib.framework/Versions/A/libBLAS.dylib... 
yes
checking whether LSAME is called correctly from Fortran... no
checking whether ISAMAX is called correctly from Fortran... yes
checking whether SDOT is called correctly from Fortran... yes
checking whether DDOT is called correctly from Fortran... yes
checking whether CDOTU is called correctly from Fortran... no
checking whether ZDOTU is called correctly from Fortran... yes
checking whether the integer size is correct... yes
=========================================

This result sets acx_blas_ok = no.
But, the script only produces an error at:
 as_fn_error "You are required to have BLAS and LAPACK libraries" 
"$LINENO" 5...
It took a bit of study to find that BLAS had really been found, but then 
turned
off due to the gfortran problem.

It would be more informative to generate an as_fn_error at the point where
acx_blas_ok is turned off.  After this, the configure is going to fail 
anyhow.

Anyhow,  does any one know if the Xcode BLAS and LAPACK are usable
with any available Fortran, or in any case, what is a working BLAS, LAPACK,
fortran combination?

Michael