Skip t/re/uniprops.t under PERL_DEBUG_READONLY_COW

Under Linux, using mmap for all memory allocation stops working when we
get up to 70,000 lines of code.  So just skip it.

1 files changed, 12 insertions, 2 deletions

diff --git a/t/re/uniprops.t b/t/re/uniprops.t
index fea734dd30..927f8a7ce1 100644
--- a/t/re/uniprops.t
+++ b/t/re/uniprops.t
@@ -1,8 +1,18 @@
 use strict;
 use warnings;
+no warnings 'once';
 
-# This is just a wrapper for a generated file.  Assumes being run from 't'
-# directory
+# This is a wrapper for a generated file.  Assumes being run from 't'
+# directory.
+
+# It is skipped by default under PERL_DEBUG_READONLY_COW, but you can run
+# it directly via:  cd t; ./perl ../lib/unicore/TestProp.pl
+
+require Config;
+if ($Config::Config{ccflags} =~ /(?:^|\s)-DPERL_DEBUG_READONLY_COW\b/) {
+    print "1..0 # Skip PERL_DEBUG_READONLY_COW\n";
+    exit;
+}
 
 do '../lib/unicore/TestProp.pl';