New package: qbox (#4711)

* New package: qbox

* API changes

* Use install instead of shutil for comd

* Use any BLAS library

* Fix typo

* Python2 fix

* python2 + fix backslashes

* Modified to respond to ld_flags correctly

* Modified to use ld_flags

* Add ld_flags support

var/spack/repos/builtin/packages/fftw/package.py

@@ -70,6 +70,11 @@ class Fftw(AutotoolsPackage):
     depends_on('autoconf', type='build', when='+pfft_patches')
     depends_on('libtool', type='build', when='+pfft_patches')
 
+    @property
+    def libs(self):
+        result = find_libraries(['libfftw3'], root=self.prefix, recurse=True)
+        return result
+
     def autoreconf(self, spec, prefix):
         if '+pfft_patches' in spec:
             autoreconf = which('autoreconf')