treewide: use blas and lapack

This makes packages use lapack and blas, which can wrap different
BLAS/LAPACK implementations.

treewide: cleanup from blas/lapack changes

A few issues in the original treewide:

- can’t assume blas64 is a bool
- unused commented code

pkgs/development/libraries/globalarrays/default.nix

@@ -1,5 +1,5 @@
 { stdenv, fetchpatch, fetchFromGitHub, autoreconfHook
-, openblas, gfortran, openssh, openmpi
+, blas, gfortran, openssh, openmpi
 } :
 
 let
@@ -17,7 +17,7 @@ in stdenv.mkDerivation {
   };
 
   nativeBuildInputs = [ autoreconfHook ];
-  buildInputs = [ openmpi openblas gfortran openssh ];
+  buildInputs = [ openmpi blas gfortran openssh ];
 
   preConfigure = ''
     configureFlagsArray+=( "--enable-i8" \
@@ -25,7 +25,7 @@ in stdenv.mkDerivation {
                            "--with-mpi3" \
                            "--enable-eispack" \
                            "--enable-underscoring" \
-                           "--with-blas8=${openblas}/lib -lopenblas" )
+                           "--with-blas8=${blas}/lib -lblas" )
   '';
 
   enableParallelBuilding = true;
@@ -38,5 +38,3 @@ in stdenv.mkDerivation {
     platforms = platforms.linux;
   };
 }
-
-