do not include execinfo.h on AIX either

Author: eddelbuettel

ChangeLog

@@ -1,3 +1,8 @@
+2014-11-01  Dirk Eddelbuettel  <edd@debian.org>
+
+        * src/api.cpp: Do not include execinfo.h on AIX, per r-devel discussion
+        with Mike Beddo, and http://sf.net/p/predef/wiki/OperatingSystems/
+
 2014-10-29  Dirk Eddelbuettel  <edd@debian.org>
 
         * inst/include/Rcpp/Rmath.h: Comment out R::[dpqr]nbinom_mu functions as

src/api.cpp

@@ -3,7 +3,7 @@
 //
 // api.cpp: Rcpp R/C++ interface class library -- Rcpp api
 //
-// Copyright (C) 2012 - 2013  Dirk Eddelbuettel and Romain Francois
+// Copyright (C) 2012 - 2014  Dirk Eddelbuettel and Romain Francois
 //
 // This file is part of Rcpp.
 //
@@ -34,7 +34,8 @@ using namespace Rcpp ;
 #endif
 
 #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) || define(_AIX)
+        // do nothing
     #else
         #include <execinfo.h>