feat(KINSOL): Switch from Eigen to KINSOL

Previously QSE solving was done using Eigen. While this worked we were
limited in the ability to use previous iterations to speed up later
steps. We have switched to KINSOL, from SUNDIALS, for linear solving.
This has drastically speed up the process of solving for QSE abundances,
primarily because the jacobian matrix does not need to be generated
every single time time a QSE abundance is requested.

build-config/meson.build

@@ -3,7 +3,7 @@ cmake = import('cmake')
 subdir('fourdst')
 subdir('libplugin')
 
-subdir('cvode')
+subdir('sundials')
 
 subdir('boost')
 subdir('cppad')

build-config/sundials/cvode/meson.build

@@ -34,7 +34,7 @@ sundials_sunmatrixdense_dep = cvode_sp.dependency('sundials_sunmatrixdense_share
 # For the dense linear solver library
 sundials_sunlinsoldense_dep = cvode_sp.dependency('sundials_sunlinsoldense_shared')
 
-sundials_dep = declare_dependency(
+cvode_dep = declare_dependency(
     dependencies: [
         sundials_core_dep,
         sundials_cvode_dep,

build-config/sundials/kinsol/meson.build

@@ -0,0 +1,29 @@
+cmake = import('cmake')
+
+kinsol_cmake_options = cmake.subproject_options()
+
+kinsol_cmake_options.add_cmake_defines({
+    'CMAKE_CXX_FLAGS'   : '-Wno-deprecated-declarations',
+    'CMAKE_C_FLAGS'     : '-Wno-deprecated-declarations',
+    'BUILD_SHARED_LIBS' : 'ON',
+    'BUILD_STATIC_LIBS' : 'OFF',
+})
+
+kinsol_cmake_options.add_cmake_defines({
+    'CMAKE_INSTALL_LIBDIR': get_option('libdir'),
+    'CMAKE_INSTALL_INCLUDEDIR': get_option('includedir')
+})
+
+kinsol_sp = cmake.subproject(
+    'kinsol',
+    options: kinsol_cmake_options,
+)
+
+sundials_kinsol_shared = kinsol_sp.dependency('sundials_kinsol_shared')
+
+kinsol_dep = declare_dependency(
+    dependencies: [
+        sundials_kinsol_shared,
+    ]
+)
+

build-config/sundials/meson.build

@@ -0,0 +1,9 @@
+subdir('cvode')
+subdir('kinsol')
+
+sundials_dep = declare_dependency(
+    dependencies: [
+        cvode_dep,
+        kinsol_dep,
+    ],
+)