Add MakeMaker::Test::Utils::have_cplusplus

Author: vovkasm

t/lib/MakeMaker/Test/Utils.pm

@@ -17,7 +17,7 @@ our $Is_FreeBSD = $^O eq 'freebsd';
 
 our @EXPORT = qw(which_perl perl_lib makefile_name makefile_backup
                  make make_run run make_macro calibrate_mtime
-                 have_compiler slurp
+                 have_compiler have_cplusplus slurp
                  $Is_VMS $Is_MacOS
                  run_ok
                  hash2files
@@ -361,6 +361,24 @@ sub have_compiler {
     return $have_compiler;
 }
 
+=item have_cplusplus
+
+  $have_compiler = have_cplusplus;
+
+Returns true if there is a C++ compiler available for XS builds.
+
+=cut
+
+sub have_cplusplus {
+    my $have_cplusplus = 0;
+    eval {
+        require ExtUtils::CBuilder;
+        my $cb = ExtUtils::CBuilder->new(quiet=>1);
+        $have_cplusplus = $cb->have_cplusplus;
+    };
+    return $have_cplusplus;
+}
+
 =item slurp
 
   $contents = slurp($filename);