support -fno-rtti via define (closes #997)

Author: eddelbuettel

ChangeLog

@@ -1,3 +1,9 @@
+2019-10-11  Dirk Eddelbuettel  <[email protected]>
+
+	* inst/include/Rcpp/exceptions.h: Condition use of typeid() on
+	absence of RCPP_NO_RTTI in two places
+	* inst/include/Rcpp/r/headers.h: RCPP_NO_RTTI implied RCPP_NO_MODULES
+
 2019-10-04  Dirk Eddelbuettel  <[email protected]>
 
 	* vignettes/Rcpp-attributes.Rmd: Correct two unevaluated knitr C++

inst/include/Rcpp/exceptions.h

@@ -318,7 +318,11 @@ inline SEXP make_condition(const std::string& ex_msg, SEXP call, SEXP cppstack,
 
 template <typename Exception>
 inline SEXP exception_to_condition_template( const Exception& ex, bool include_call) {
+#ifndef RCPP_NO_RTTI
   std::string ex_class = demangle( typeid(ex).name() ) ;
+#else
+  std::string ex_class = "<not available>";
+#endif
   std::string ex_msg   = ex.what() ;
 
   Rcpp::Shelter<SEXP> shelter;
@@ -369,7 +373,10 @@ inline SEXP exception_to_try_error( const std::exception& ex){
 }
 
 std::string demangle( const std::string& name) ;
+#ifndef RCPP_NO_RTTI
 #define DEMANGLE(__TYPE__) demangle( typeid(__TYPE__).name() ).c_str()
+#endif
+
 
 inline void forward_exception_to_r(const std::exception& ex){
     SEXP stop_sym  = Rf_install( "stop" ) ;

inst/include/Rcpp/r/headers.h

@@ -1,7 +1,7 @@
 // headers.h: Rcpp R/C++ interface class library -- R headers
 //
 // Copyright (C) 2008 - 2009 Dirk Eddelbuettel
-// Copyright (C) 2009 - 2013 Dirk Eddelbuettel and Romain Francois
+// Copyright (C) 2009 - 2019 Dirk Eddelbuettel and Romain Francois
 //
 // This file is part of Rcpp.
 //
@@ -26,6 +26,7 @@
 #define R_NO_REMAP
 
 // until September 2019, define RCPP_NO_STRICT_R_HEADERS for transition
+// (that goal was too optimistic, reverse depency checks showed too much breakage)
 #ifndef RCPP_NO_STRICT_R_HEADERS
 # define RCPP_NO_STRICT_R_HEADERS
 #endif
@@ -36,6 +37,13 @@
 # endif
 #endif
 
+// no rtti implies no modules
+#ifdef RCPP_NO_RTTI
+# ifndef RCPP_NO_MODULES
+#  define RCPP_NO_MODULES
+# endif
+#endif
+
 // prevent some macro pollution when including R headers
 // in particular, on Linux, gcc 'leaks' the 'major',
 // 'minor' and 'makedev' macros on Linux; we prevent