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/science/math/suitesparse/4.2.nix

@@ -1,7 +1,7 @@
-{ stdenv, fetchurl, gfortran, openblas }:
+{ stdenv, fetchurl, gfortran, blas, lapack }:
 
 let
-  int_t = if openblas.blas64 then "int64_t" else "int32_t";
+  int_t = if blas.is64bit then "int64_t" else "int32_t";
 in
 stdenv.mkDerivation rec {
   version = "4.2.1";
@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
   };
 
   nativeBuildInputs = [ gfortran ];
-  buildInputs = [ openblas ];
+  buildInputs = [ blas lapack ];
 
   preConfigure = ''
     mkdir -p $out/lib
@@ -29,8 +29,8 @@ stdenv.mkDerivation rec {
     "PREFIX=\"$(out)\""
     "INSTALL_LIB=$(out)/lib"
     "INSTALL_INCLUDE=$(out)/include"
-    "BLAS=-lopenblas"
-    "LAPACK="
+    "BLAS=-lblas"
+    "LAPACK=-llapack"
   ];
 
   meta = with stdenv.lib; {

pkgs/development/libraries/science/math/suitesparse/4.4.nix

@@ -1,12 +1,12 @@
-{ stdenv, fetchurl, gfortran, openblas
-, enableCuda  ? false, cudatoolkit
+{ stdenv, fetchurl, gfortran, blas, lapack
+, enableCuda ? false, cudatoolkit
 }:
 
 let
   version = "4.4.4";
   name = "suitesparse-${version}";
 
-  int_t = if openblas.blas64 then "int64_t" else "int32_t";
+  int_t = if blas.is64bit then "int64_t" else "int32_t";
   SHLIB_EXT = stdenv.hostPlatform.extensions.sharedLibrary;
 in
 stdenv.mkDerivation {
@@ -51,8 +51,8 @@ stdenv.mkDerivation {
     "PREFIX=\"$(out)\""
     "INSTALL_LIB=$(out)/lib"
     "INSTALL_INCLUDE=$(out)/include"
-    "BLAS=-lopenblas"
-    "LAPACK="
+    "BLAS=-lblas"
+    "LAPACK=-llapack"
   ];
 
   NIX_CFLAGS_COMPILE = stdenv.lib.optionalString stdenv.isDarwin " -DNTIMER";
@@ -64,7 +64,7 @@ stdenv.mkDerivation {
         for i in "$out"/lib/lib*.a; do
           ar -x $i
         done
-        ${if enableCuda then cudatoolkit else stdenv.cc.outPath}/bin/${if enableCuda then "nvcc" else "cc"} *.o ${if stdenv.isDarwin then "-dynamiclib" else "--shared"} -o "$out/lib/libsuitesparse${SHLIB_EXT}" -lopenblas ${stdenv.lib.optionalString enableCuda "-lcublas"}
+        ${if enableCuda then cudatoolkit else stdenv.cc.outPath}/bin/${if enableCuda then "nvcc" else "cc"} *.o ${if stdenv.isDarwin then "-dynamiclib" else "--shared"} -o "$out/lib/libsuitesparse${SHLIB_EXT}" -lblas ${stdenv.lib.optionalString enableCuda "-lcublas"}
     )
     for i in umfpack cholmod amd camd colamd spqr; do
       ln -s libsuitesparse${SHLIB_EXT} "$out"/lib/lib$i${SHLIB_EXT}
@@ -88,7 +88,7 @@ stdenv.mkDerivation {
   '';
 
   nativeBuildInputs = [ gfortran ];
-  buildInputs = [ openblas ];
+  buildInputs = [ blas lapack ];
 
   meta = with stdenv.lib; {
     homepage = "http://faculty.cse.tamu.edu/davis/suitesparse.html";

pkgs/development/libraries/science/math/suitesparse/default.nix

@@ -1,7 +1,7 @@
 { stdenv
 , fetchFromGitHub
 , gfortran
-, openblas
+, blas, lapack
 , metis
 , fixDarwinDylibNames
 , gnum4
@@ -27,7 +27,7 @@ stdenv.mkDerivation rec {
   ] ++ stdenv.lib.optional stdenv.isDarwin fixDarwinDylibNames;
 
   buildInputs = [
-    openblas
+    blas lapack
     metis
     gfortran.cc.lib
   ] ++ stdenv.lib.optional enableCuda cudatoolkit;
@@ -41,10 +41,10 @@ stdenv.mkDerivation rec {
     "INSTALL=${placeholder "out"}"
     "INSTALL_INCLUDE=${placeholder "dev"}/include"
     "JOBS=$(NIX_BUILD_CORES)"
-    "BLAS=-lopenblas"
+    "BLAS=-lblas"
+    "LAPACK=-llapack"
     "MY_METIS_LIB=-lmetis"
-    "LAPACK="
-  ] ++ stdenv.lib.optionals openblas.blas64 [
+  ] ++ stdenv.lib.optionals blas.is64bit [
     "CFLAGS=-DBLAS64"
   ] ++ stdenv.lib.optionals enableCuda [
     "CUDA_PATH=${cudatoolkit}"