[gcc(refs/users/iains/heads/d-for-darwin)] libphobos: Checkpoint in darwin runtime support

[Iain D Sandoe]

https://gcc.gnu.org/g:1671d39f22ddd0cf839f0c634bcda6632eaf3d57

commit 1671d39f22ddd0cf839f0c634bcda6632eaf3d57
Author: Iain Buclaw <ibuclaw@gdcproject.org>
Date:   Sun Nov 29 14:44:28 2020 +0100

    libphobos: Checkpoint in darwin runtime support

Diff:
---
 libphobos/testsuite/lib/libphobos.exp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/libphobos/testsuite/lib/libphobos.exp b/libphobos/testsuite/lib/libphobos.exp
index 3be2092b12e..ad323d761b9 100644
--- a/libphobos/testsuite/lib/libphobos.exp
+++ b/libphobos/testsuite/lib/libphobos.exp
@@ -90,6 +90,10 @@ proc libphobos-dg-test { prog do_what extra_tool_flags } {
 }
 
 proc libphobos-dg-prune { system text } {
+
+    # Ignore warnings from cctools.
+    regsub -all "(^|\n)clang: warning: argument unused during compilation:\[^\n\]*" $text "" text
+
     return $text
 }