From 48959daf724bb10802ca489654035f69e701efc0 Mon Sep 17 00:00:00 2001
From: David Levine <levinedl@acm.org>
Date: Sun, 10 Jun 2012 22:50:24 -0500
Subject: [PATCH] Replaced run-time detection of hard-link support with
 compile- time detection.  This way, Cygwin packages can be
 built on NTFS or other filesystems but still bee installed
 on FAT file systems, which do not support hard links.

---
 Makefile.am  |   34 +++++++---------------------------
 configure.ac |    7 +++++++
 2 files changed, 14 insertions(+), 27 deletions(-)

diff --git a/Makefile.am b/Makefile.am
index d64fa3c..d55479c 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -417,10 +417,6 @@ etc/sendfiles: $(srcdir)/etc/sendfiles.in Makefile
 ##
 ## This rule gets called at "make install" time; we use it to create links
 ## between different programs.
-## On Cygwin, the choice of ln or ln -s must be made at install time,
-## not configure time, because some filesystems (NTFS) support hard
-## links but others (FAT32) don't.  The fallback to cp -p might not be
-## needed, but it's here just in case.
 ##
 install-exec-hook:
 	rm -f $(DESTDIR)$(bindir)/flists$(EXEEXT)
@@ -430,29 +426,13 @@ install-exec-hook:
 	rm -f $(DESTDIR)$(bindir)/unseen$(EXEEXT)
 	rm -f $(DESTDIR)$(bindir)/prev$(EXEEXT)
 	rm -f $(DESTDIR)$(bindir)/next$(EXEEXT)
-	cd $(DESTDIR)$(bindir) && \
-	  if ln flist$(EXEEXT) flists$(EXEEXT) 2>/dev/null && \
-	    ln folder$(EXEEXT) folders$(EXEEXT) && \
-	    ln new$(EXEEXT) fnext$(EXEEXT) && \
-	    ln new$(EXEEXT) fprev$(EXEEXT) && \
-	    ln new$(EXEEXT) unseen$(EXEEXT) && \
-	    ln show$(EXEEXT) prev$(EXEEXT) && \
-	    ln show$(EXEEXT) next$(EXEEXT); then :; \
-	  elif ln -s flist$(EXEEXT) flists$(EXEEXT) 2>/dev/null && \
-	    ln -s folder$(EXEEXT) folders$(EXEEXT) && \
-	    ln -s new$(EXEEXT) fnext$(EXEEXT) && \
-	    ln -s new$(EXEEXT) fprev$(EXEEXT) && \
-	    ln -s new$(EXEEXT) unseen$(EXEEXT) && \
-	    ln -s show$(EXEEXT) prev$(EXEEXT) && \
-	    ln -s show$(EXEEXT) next$(EXEEXT); then :; \
-	  else cp -p flist$(EXEEXT) flists$(EXEEXT) && \
-	    cp -p folder$(EXEEXT) folders$(EXEEXT) && \
-	    cp -p new$(EXEEXT) fnext$(EXEEXT) && \
-	    cp -p new$(EXEEXT) fprev$(EXEEXT) && \
-	    cp -p new$(EXEEXT) unseen$(EXEEXT) && \
-	    cp -p show$(EXEEXT) prev$(EXEEXT) && \
-	    cp -p show$(EXEEXT) next$(EXEEXT); \
-	  fi
+	@LINK_FILE@ $(DESTDIR)$(bindir)/flist$(EXEEXT) $(DESTDIR)$(bindir)/flists$(EXEEXT)
+	@LINK_FILE@ $(DESTDIR)$(bindir)/folder$(EXEEXT) $(DESTDIR)$(bindir)/folders$(EXEEXT)
+	@LINK_FILE@ $(DESTDIR)$(bindir)/new$(EXEEXT) $(DESTDIR)$(bindir)/fnext$(EXEEXT)
+	@LINK_FILE@ $(DESTDIR)$(bindir)/new$(EXEEXT) $(DESTDIR)$(bindir)/fprev$(EXEEXT)
+	@LINK_FILE@ $(DESTDIR)$(bindir)/new$(EXEEXT) $(DESTDIR)$(bindir)/unseen$(EXEEXT)
+	@LINK_FILE@ $(DESTDIR)$(bindir)/show$(EXEEXT) $(DESTDIR)$(bindir)/prev$(EXEEXT)
+	@LINK_FILE@ $(DESTDIR)$(bindir)/show$(EXEEXT) $(DESTDIR)$(bindir)/next$(EXEEXT)
 	if test x$(SETGID_MAIL) != x; then \
 		chgrp $(MAIL_SPOOL_GRP) $(DESTDIR)$(bindir)/inc$(EXEEXT) && \
 		chmod 2755 $(DESTDIR)$(bindir)/inc$(EXEEXT); \
diff --git a/configure.ac b/configure.ac
index daec29c..a0602df 100644
--- a/configure.ac
+++ b/configure.ac
@@ -327,6 +327,13 @@ dnl then use `vi' as the default.
 AS_IF([test -z "$editorpath"], [editorpath="$vipath"])
 AC_SUBST([editorpath])dnl
 
+dnl Cygwin FAT filesystems do not support hard links.  So use cp instead,
+dnl even if running on an NTFS or other filesystem.
+AS_CASE(["$host_os"],
+  [cygwin*],[LINK_FILE=cp],
+  [LINK_FILE=ln])
+AC_SUBST([LINK_FILE])
+
 dnl ----------------------------------------------------------
 dnl FIND MAIL SPOOL AND SEE IF WE NEED TO MAKE inc SETGID MAIL
 dnl ----------------------------------------------------------
-- 
1.7.10.4