From f51d08573e0b5ee447c03bd83547ed252103354c Mon Sep 17 00:00:00 2001
From: David Levine <levinedl@acm.org>
Date: Sat, 5 May 2012 10:05:36 -0500
Subject: [PATCH] Check for success of hard links of bin files.  If they fail,
 try sym links.  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.  Fallback to cp -p, though might not be needed, just
 in case.

---
 MACHINES    |   10 ++++++++--
 Makefile.am |   36 ++++++++++++++++++++++++++++--------
 2 files changed, 36 insertions(+), 10 deletions(-)

diff --git a/MACHINES b/MACHINES
index 2f25e91..ba36863 100644
--- a/MACHINES
+++ b/MACHINES
@@ -20,8 +20,12 @@ Known Compilation problems:
 --------------------------------------
 Cygwin:
 
-Be sure to install Cygwin packages libncurses-devel and libncurses10,
-in the Libs category.
+Be sure to install these Cygwin packages:
+  gdbm
+  libgdbm4
+  libgdbm-devel
+  libncurses10
+  libncurses-devel
 
 --------------------------------------
 HPUX:
@@ -71,12 +75,14 @@ a better solution. The whole thing is probablly going to be chucked
 with UTF-8 support anyway.
 
 Other than the warnings, it builds ok.
+
 --------------------------------------
 SunOS 4.1.1/4.1.3/4.1.4:
 
 You can't use the C compiler that comes with SunOS 4 since
 it isn't ANSI C.  But nmh builds just fine with gcc. With
 --enable-debug you will see a lot of warnings.
+
 --------------------------------------
 
 --
diff --git a/Makefile.am b/Makefile.am
index adf3f89..bacc263 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -224,7 +224,7 @@ EXTRA_DIST = config/version.sh sbr/sigmsg.awk etc/mts.conf.in etc/sendfiles.in \
 	     test/README $(TESTS) test/inc/deb359167.mbox \
 	     test/inc/fromline.txt test/inc/msgheader.txt test/inc/filler.txt \
 	     test/inc/md5sums test/post/test-post-common.sh \
-	     SPECS/nmh.spec
+	     SPECS/nmh.spec SPECS/build-nmh-cygwin
 
 ##
 ## These are all of the definitions for each of the programs listed above.
@@ -414,6 +414,10 @@ 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)
@@ -423,13 +427,29 @@ install-exec-hook:
 	rm -f $(DESTDIR)$(bindir)/unseen$(EXEEXT)
 	rm -f $(DESTDIR)$(bindir)/prev$(EXEEXT)
 	rm -f $(DESTDIR)$(bindir)/next$(EXEEXT)
-	ln $(DESTDIR)$(bindir)/flist$(EXEEXT) $(DESTDIR)$(bindir)/flists$(EXEEXT)
-	ln $(DESTDIR)$(bindir)/folder$(EXEEXT) $(DESTDIR)$(bindir)/folders$(EXEEXT)
-	ln $(DESTDIR)$(bindir)/new$(EXEEXT) $(DESTDIR)$(bindir)/fnext$(EXEEXT)
-	ln $(DESTDIR)$(bindir)/new$(EXEEXT) $(DESTDIR)$(bindir)/fprev$(EXEEXT)
-	ln $(DESTDIR)$(bindir)/new$(EXEEXT) $(DESTDIR)$(bindir)/unseen$(EXEEXT)
-	ln $(DESTDIR)$(bindir)/show$(EXEEXT) $(DESTDIR)$(bindir)/prev$(EXEEXT)
-	ln $(DESTDIR)$(bindir)/show$(EXEEXT) $(DESTDIR)$(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
 	if test x$(SETGID_MAIL) != x; then \
 		chgrp $(MAIL_SPOOL_GRP) $(DESTDIR)$(bindir)/inc$(EXEEXT) && \
 		chmod 2755 $(DESTDIR)$(bindir)/inc$(EXEEXT); \
-- 
1.7.10.4