[PATCH 3/4] _AS_LN_S_PREPARE: default to 'cp -pR' on OS/2

On OS/2, any others than kLIBC have no symlinks.

* lib/m4sugar/m4sh.m4 (_AS_LN_S_PREPARE): Subject.
---
 lib/m4sugar/m4sh.m4 |    9 +++++----
 1 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/lib/m4sugar/m4sh.m4 b/lib/m4sugar/m4sh.m4
index a94999e..8f6d184 100644
--- a/lib/m4sugar/m4sh.m4
+++ b/lib/m4sugar/m4sh.m4
@@ -1189,12 +1189,13 @@ fi
 if (echo >conf$$.file) 2>/dev/null; then
   if ln -s conf$$.file conf$$ 2>/dev/null; then
     as_ln_s='ln -s'
-    # ... but there are two gotchas:
+    # ... but there are three gotchas:
     # 1) On MSYS, both `ln -s file dir' and `ln file dir' fail.
     # 2) DJGPP < 2.04 has no symlinks; `ln -s' creates a wrapper executable.
-    # In both cases, we have to default to `cp -pR'.
-    ln -s conf$$.file conf$$.dir 2>/dev/null && test ! -f conf$$.exe ||
-      as_ln_s='cp -pR'
+    # 3) On OS/2, any others than kLIBC has no symlinks.
+    # In three cases, we have to default to `cp -pR'.
+    ln -s conf$$.file conf$$.dir 2>/dev/null && test ! -f conf$$.exe &&
+      test -z "$OS2_SHELL" || as_ln_s='cp -pR'
   elif ln conf$$.file conf$$ 2>/dev/null; then
     as_ln_s=ln
   else
-- 
1.7.3.2