work around macro leakage

Author: kevinushey

ChangeLog

@@ -1,3 +1,8 @@
+2015-01-15  Kevin Ushey  <kevinushey@gmail.com>
+
+        * inst/include/RcppCommon.h: remove leaked macros
+        'major', 'minor' and 'makedev' from sys/sysmacros.h
+
 2015-01-08  Dirk Eddelbuettel  <edd@debian.org>
 
         * inst/examples/OpenMP/GNUmakefile: Renamed from Makefile because it

inst/include/RcppCommon.h

@@ -30,6 +30,32 @@
 #include <Rcpp/config.h>
 #include <Rcpp/macros/macros.h>
 
+// include <sys/sysmacros.h>, and then remove stupid
+// 'major', 'minor' and 'makedev' defines. this works
+// around Rinternals.h eventually including this header
+// and letting the macros leak through
+#if defined(__GNUC__) && !defined(__clang__)
+
+# ifdef major
+#  warning Macro 'major' will be undefined! See https://bugzilla.redhat.com/show_bug.cgi?id=130601.
+# endif
+
+# ifdef minor
+#  warning Macro 'minor' will be undefined! See https://bugzilla.redhat.com/show_bug.cgi?id=130601.
+# endif
+
+# ifdef makedev
+#  warning Macro 'makedev' will be undefined! See https://bugzilla.redhat.com/show_bug.cgi?id=130601.
+# endif
+
+# include <sys/sysmacros.h>
+
+# undef major
+# undef minor
+# undef makedev
+
+#endif
+
 // include R headers, but set R_NO_REMAP and access everything via Rf_ prefixes
 #define MAXELTSIZE 8192
 #define R_NO_REMAP