Specify explicitly only the needed symbols to export from the DLL. This is

safer wrt to possible naming conflicts and fixes linking on Windows using
gcc 13.2, which produces weak symbols, which in turn cannot be exported from
the DLL. Fix R_init_rstanarm to be found by R.

Author: kalibera

src/init.cpp

@@ -32,8 +32,10 @@ static const R_CallMethodDef CallEntries[] = {
   {NULL, NULL, 0}
 };
 
-void attribute_visible R_init_rstanarm(DllInfo *dll) {
-  // next line is necessary to avoid a NOTE from R CMD check
-  R_registerRoutines(dll, NULL, CallEntries, NULL, NULL);
-  R_useDynamicSymbols(dll, TRUE); // necessary for .onLoad() to work
+extern "C" {
+  void attribute_visible R_init_rstanarm(DllInfo *dll) {
+    // next line is necessary to avoid a NOTE from R CMD check
+    R_registerRoutines(dll, NULL, CallEntries, NULL, NULL);
+    R_useDynamicSymbols(dll, TRUE); // necessary for .onLoad() to work
+  }
 }

src/rstanarm-win.def

@@ -1,3 +1,11 @@
 LIBRARY rstanarm.dll
 EXPORTS
-  
+    R_init_rstanarm
+    _rcpp_module_boot_stan_fit4bernoulli_mod
+    _rcpp_module_boot_stan_fit4binomial_mod
+    _rcpp_module_boot_stan_fit4continuous_mod
+    _rcpp_module_boot_stan_fit4count_mod
+    _rcpp_module_boot_stan_fit4jm_mod
+    _rcpp_module_boot_stan_fit4lm_mod
+    _rcpp_module_boot_stan_fit4mvmer_mod
+    _rcpp_module_boot_stan_fit4polr_mod