Ensure the wrapper compilers detect and respect OPAL_PREFIX

This commit was SVN r21953.

ompi/tools/wrappers/ompi_wrapper_script.in

@@ -2,9 +2,21 @@
 # -*- perl -*-
 
 use File::Basename;
+use File::Spec::Functions;
 
 my $includedir = "@OMPI_WRAPPER_INCLUDEDIR@";
 my $libdir = "@OMPI_WRAPPER_LIBDIR@";
+
+# obey the OPAL_DESTDIR environmant variable
+if (exists($ENV{'OPAL_DESTDIR'})
+  && defined($ENV{'OPAL_DESTDIR'})
+  && (length($ENV{'OPAL_DESTDIR'}) > 0)) {
+    my $ddir = $ENV{'OPAL_DESTDIR'};
+
+    $includedir = catdir($ddir, $includedir);
+    $libdir = catdir($ddir, $libdir);
+}
+
 my $CC = "@CC@";
 my $CXX = "@CXX@";
 my $F77 = "@F77@";
@@ -50,7 +62,7 @@ sub add_extra_includes {
     my $str = "";
     my @includes = split(' ', $extra_includes);
     for my $include (@includes) {
-        $str .= $include_flag . $include . " ";
+        $str .= $include_flag . catdir($includedir, $include) . " ";
     }
 
     return $str;