Don't install Cygwin code into other platforms

DynaLoader already has its own preprocessor to filter out code that
is only relevant on other platforms, so use it for the change from
commit cc7e77fd

diff --git a/ext/DynaLoader/DynaLoader_pm.PL b/ext/DynaLoader/DynaLoader_pm.PL
index cfee108..a86557e 100644 (file)
--- a/ext/DynaLoader/DynaLoader_pm.PL
+++ b/ext/DynaLoader/DynaLoader_pm.PL
@@ -456,7 +456,9 @@ sub dl_findfile {
             # these should be ordered with the most likely first
             push(@names,"$_.$dl_dlext")    unless m/\.$dl_dlext$/o;
             push(@names,"$_.$dl_so")     unless m/\.$dl_so$/o;
-            push(@names,"cyg$_.$dl_so")  if !m:/: and $^O eq 'cygwin';
+           <<$^O-eq-cygwin>>
+            push(@names,"cyg$_.$dl_so")  unless m:/:;
+           <</$^O-eq-cygwin>>
             push(@names,"lib$_.$dl_so")  unless m:/:;
             push(@names,"$_.a")          if !m/\.a$/ and $dlsrc eq "dl_dld.xs";
             push(@names, $_);