now tests for defined(_AIX) in both required places

Author: eddelbuettel

ChangeLog

@@ -9,9 +9,9 @@
         not declared by R with Rf_* name-mapping prefixes
 
 2014-10-17  Chenliang Xu <luckyrand@gmail.com>
-        
+
         * R/Attributes: Enable scanning of header files
-        
+
 2014-10-03  JJ Allaire  <jj@rstudio.org>
 
         * R/Attributes.R: Only look for plugins in the package's namespace

src/api.cpp

@@ -257,16 +257,14 @@ SEXP rcpp_can_use_cxx11(){
 // [[Rcpp::register]]
 SEXP stack_trace( const char* file, int line ){
     #if defined(__GNUC__)
-        #if defined(WIN32) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__CYGWIN__) || defined(__sun)
+        #if defined(WIN32) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__CYGWIN__) || defined(__sun) || defined(_AIX)
             // Simpler version for Windows and *BSD
-            List trace = List::create(
-                _[ "file"  ] = file,
-                _[ "line"  ] = line,
-                _[ "stack" ] = "C++ stack not available on this system"
-            ) ;
+            List trace = List::create(_["file"] = file,
+                                      _[ "line"  ] = line,
+                                      _[ "stack" ] = "C++ stack not available on this system");
             trace.attr("class") = "Rcpp_stack_trace" ;
             return trace ;
-        #else // ! (defined(WIN32) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__CYGWIN__) || defined(__sun)
+        #else // ! (defined(WIN32) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__CYGWIN__) || defined(__sun) || defined(_AIX)
 
             /* inspired from http://tombarta.wordpress.com/2008/08/01/c-stack-traces-with-gcc/  */
             const size_t max_depth = 100;