Use new rstantools structure

Author: andrjohns

.Rbuildignore

@@ -5,7 +5,7 @@
 ^\.Rproj\.user$
 ^.*\.so$
 ^.*\.o$
-^src/stanmarg\.hpp$
+^src$
 ^\.github$
 ^_pkgdown\.yml$
 ^docs$

R/stanmodels.R

@@ -0,0 +1,4 @@
+# Generated by rstantools.  Do not edit by hand.
+
+#! /bin/sh
+"${R_HOME}/bin/Rscript" -e "rstantools::rstan_config()"

configure

@@ -0,0 +1,11 @@
+#! /bin/sh
+
+# Generate Makevars.win file with rstan flags
+"${R_HOME}/bin${R_ARCH_BIN}/Rscript.exe" -e "rstantools:::.add_standir(pkgdir = \".\", \"src\", msg = FALSE, warn = FALSE)"
+"${R_HOME}/bin${R_ARCH_BIN}/Rscript.exe" -e "rstantools:::.add_Makevars(pkgdir = \".\", win = TRUE)"
+
+# Add configuration needed for big object files
+echo "PKG_CXXFLAGS += -Wa,-mbig-obj" >> ./src/Makevars.win
+
+# Compile Stan models using rstantools
+"${R_HOME}/bin${R_ARCH_BIN}/Rscript.exe" -e "rstantools::rstan_config()"