some generalization of the NSE table stuff (#1580)

this fixes table initialization and linking with nets other than
aprox19.  The instructions are also updated.

Make.Microphysics_extern

@@ -91,9 +91,7 @@ table:
 ifeq ($(USE_NSE_TABLE),TRUE)
   NSE_TABULAR_HOME ?= $(MICROPHYSICS_HOME)/nse_tabular
   EXTERN_CORE += $(NSE_TABULAR_HOME)
-  ifeq ($(findstring aprox19, $(NETWORK_DIR)), aprox19)
-     all: nsetable
-  endif
+  all: nsetable
 endif
 
 nsetable:

interfaces/network_initialization.cpp

@@ -12,6 +12,9 @@
 #include <nse_solver.H>
 #endif
 #endif
+#ifdef NSE_TABLE
+#include <nse_table.H>
+#endif
 
 void network_init()
 {
@@ -28,6 +31,9 @@ nonaka_init();
     actual_rhs_init();
 #endif
 
+#ifdef NSE_TABLE
+    // read in the NSE table (if there is one)
+    init_nse();
+#endif
 #endif
-
 }

networks/aprox19/actual_network.H

@@ -15,17 +15,11 @@ using namespace amrex;
 #include <extern_parameters.H>
 #include <tfactors.H>
 #include <aprox_rates.H>
-#ifdef NSE_TABLE
-#include <nse_table.H>
-#endif
 
 using namespace network_rp;
 
 AMREX_INLINE
 void actual_network_init() {
-#ifdef NSE_TABLE
-    init_nse();
-#endif
 }
 
 #ifndef NSE

nse_tabular/README.md

@@ -46,6 +46,10 @@ The table provides:
 * X(A), X(B), ... : the reduced composition mass fractions.  They are
   assumed to be in the same order as the nuclei in the on-grid network.
 
+The data is ordered such that rho varies the slowest (from low to
+high), T varies the next slowest (from low to high), and Ye varies the
+fastest (from high to low).
+
 
 ## Generating the table
 
@@ -90,9 +94,15 @@ following should be copied into the on-grid network's subdirectory
   into it.  Note the `table_name` string in the header should be
   updated to reflect the new name of the table.
 
-The data is ordered such that rho varies the slowest (from low to
-high), T varies the next slowest (from low to high), and Ye varies the
-fastest (from high to low).
+You also need to add a line to the network's `Make.package` of the form:
+
+```
+NSE_TABLE_NAME := nse.tbl
+```
+
+making sure to use whatever filename you renamed the table to.  This will
+be used to ensure that the table is symlinked into the build directory.
+
 
 ## Outputting for a different network