QuantLib

A common way to test an alternate compiler is to override CC and CXX, eg:

./configure CC=/root/gcc-test/bin/gcc CXX=/root/gcc-test/bin/g++

Unfortunately configure fails to find the boost unit test libs because it
creates patterns with the full pathname:

/root/gcc-test/bin/g++ -o conftest conftest.cc
-lboost_unit_test_framework-/root/gcc-test/bin/gcc44

We can use basename to strip the full path from CC. After applying the
patch and running autoconf we now find the library:

/root/gcc-test/bin/g++ -o conftest conftest.cc
-lboost_unit_test_framework-gcc44