installing gcc various versions

[Francesco Pietra <chiendarret@gmail.com>]

With amd64 lenny I have gcc 4.3.2

Because of problems in linking libraries (ACML 4.1.0), is it safe to
install also previous versions of gcc?

The link is

LIBS= L/opt/acml4.2.0/gfortran64_mp_int64/lib -lacml_mv -lgfortran -lpthread

while

francesco@tya64:~$ echo $LD_LIBRARY_PATH
/opt/intel/mkl/10.0.1.014/lib/em64t:/opt/intel/cce/10.1.015/lib:/opt/intel/fce/10.1.015/lib:/usr/local/lib:/opt/acml4.2.0/gfortran64_mp/lib
francesco@tya64:~$

and the compilation complains "-lacml_mv not found"

The same compilation had no problems one year ago with amd64 etch;
this is why i am thinking to the version of gcc.

thanks for suggestions
francesco pietra