1 files changed, 7 insertions, 0 deletions
diff --git a/gcc/testsuite/lib/objc.exp b/gcc/testsuite/lib/objc.exp
index 934f31dabdc..9d7bac0b03b 100644
--- a/gcc/testsuite/lib/objc.exp
+++ b/gcc/testsuite/lib/objc.exp
@@ -102,6 +102,13 @@ proc objc_init { args } {
     setenv LC_ALL C
     setenv LANG C
 
+    # Many hosts now default to a non-ASCII C locale, however, so
+    # they can set a charset encoding here if they need.
+    if { [ishost "*-*-cygwin*"] } {
+      setenv LC_ALL C.ASCII
+      setenv LANG C.ASCII
+    }
+
     if { $objc_initialized == 1 } { return; }
 
     if ![info exists OBJC_UNDER_TEST] then {