Maybe necessary to link with tinfo?

[larsbrinkhoff]

@ams and @drforbin, please continue discussion here. I'm curious why -ltinfo would be needed now, when it was not the case before. Please elaborate.

See also: PDP-10/its#2322

[johnsonjh]

Depending on the way nurses was compiled, linking libtinfo may be necessary. If you use pkg-config to get the libraries to link, it does usually include tinfo:

$ pkg-config --libs ncurses
-lncurses -ltinfo
$ pkg-config --libs ncursesw
-lncursesw -ltinfo

[johnsonjh]

Instead of using -lncurses you could do something like:

diff --git a/Makefile b/Makefile
index a2941f5..6d17b53 100644
--- a/Makefile
+++ b/Makefile
@@ -1,12 +1,13 @@
 # Makefile for the supdup server and client.

+SHELL = /bin/sh
 PREFIX ?= /usr/local

 OS_NAME = $(shell uname)
 ifeq ($(OS_NAME), Darwin)
 OS = OSX
 endif

 CC = cc
 CFLAGS = -g -Wall
 LDFLAGS = -g
@@ -14,21 +15,21 @@ LDFLAGS = -g
 # Mac OSX
 ifeq ($(OS), OSX)
 LDFLAGS = -L/opt/local/lib
 endif

 # The server isn't ready for prime time.
 all:   supdup

 SUPDUP_OBJS = supdup.o charmap.o tcp.o chaos.o
 supdup: $(SUPDUP_OBJS)
-       $(CC) $(LDFLAGS) -o $@ $(SUPDUP_OBJS) -lncurses
+       $(CC) $(LDFLAGS) -o $@ $(SUPDUP_OBJS) $(shell pkg-config --libs ncurses 2> /dev/null || echo '-lncurses')

 SUPDUPD_OBJS = supdupd.o
 supdupd: $(SUPDUPD_OBJS)
        $(CC) $(LDFLAGS) -o $@ $(SUPDUPD_OBJS)

 install: supdup
        install -m 0755 supdup $(PREFIX)/bin
        test -x supdupd && install -m 0755 supdupd $(PREFIX)/bin

 clean:

This is GNU syntax, but that should be fine, as the Makefile doesn't work under bmake currently anyway.

[johnsonjh]

I made a PR at #36

Linux/musl, NetBSD, OpenBSD, AIX, and Haiku now work; they didn't before.

[ams]

I cannot explain why things changed, but historically -lcurses also needs -ltinfo for various stupid reasons to just be sure -- sometimes even -ltermcap. It has always been a hit and miss.