[PATCH] Use dg-do preprocess instead of compile for tests

[Jonathan Wakely]

These tests only need to be preprocessed not compiled.

        * testsuite/experimental/feat-cxx14.cc: Only preprocess, not compile.
        * testsuite/experimental/feat-lib-fund.cc: Likewise.

Tested powerpc64le-linux, committed to trunk.


commit 8ac566ed5dd7b70bc253008d89d569f2dd4dcc33
Author: Jonathan Wakely <jwak...@redhat.com>
Date:   Tue Aug 23 08:45:19 2016 +0100

    Use dg-do preprocess instead of compile for tests
    
        * testsuite/experimental/feat-cxx14.cc: Only preprocess, not compile.
        * testsuite/experimental/feat-lib-fund.cc: Likewise.

diff --git a/libstdc++-v3/testsuite/experimental/feat-cxx14.cc 
b/libstdc++-v3/testsuite/experimental/feat-cxx14.cc
index c61f7b0..8c0061e 100644
--- a/libstdc++-v3/testsuite/experimental/feat-cxx14.cc
+++ b/libstdc++-v3/testsuite/experimental/feat-cxx14.cc
@@ -1,5 +1,4 @@
-// { dg-options "-std=gnu++14" }
-// { dg-do compile }
+// { dg-do preprocess { target c++14 } }
 
 #include <utility>
 #include <tuple>
diff --git a/libstdc++-v3/testsuite/experimental/feat-lib-fund.cc 
b/libstdc++-v3/testsuite/experimental/feat-lib-fund.cc
index fbc3744..b0e6e28 100644
--- a/libstdc++-v3/testsuite/experimental/feat-lib-fund.cc
+++ b/libstdc++-v3/testsuite/experimental/feat-lib-fund.cc
@@ -1,5 +1,4 @@
-// { dg-options "-std=gnu++14" }
-// { dg-do compile }
+// { dg-do preprocess { target c++14 } }
 
 #if !__has_include(<experimental/tuple>)
 #  error "<experimental/tuple>"