From 582d3bf96bc0ff3e3b242536d2433a8ed8d01e40 Mon Sep 17 00:00:00 2001
From: Joshua Judson Rosen
Date: Fri, 31 Mar 2017 05:28:00 -0400
Subject: Drop undocumented readline dependency

Yet another of the niceties that comes out of just using guile's REPL
is that readline support is just figured out when building guile;
so by the time gnurobots is being built, readline support is either
there or it isn't--and even if our guile isn't readline-enabled,
we can still just run without readline (though, in practice,
I don't think I've ever seen a build of guile in the last 15 years
that didn't have readline...).
---
 configure.ac    | 24 ------------------------
 src/Makefile.am |  4 ++--
 src/ui-cmdwin.c |  2 --
 3 files changed, 2 insertions(+), 28 deletions(-)

diff --git a/configure.ac b/configure.ac
index 26ffaa1..d102a3f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -39,30 +39,6 @@ AC_SUBST(schemedir)
 mapsdir="\$(pkgdatadir)/maps"
 AC_SUBST(mapsdir)
 
-for termlib in ncurses curses termcap terminfo termlib ; do
-	AC_CHECK_LIB(${termlib}, tgoto,
-		[READLINE_EXTRA="-l${termlib}"; break])
-done
-
-AC_CHECK_LIB(readline,readline,[READLINE_LIBS=-lreadline],
-	AC_MSG_ERROR([
-
-You need the GNU Readline library to build this program.
-
-]),[$READLINE_EXTRA])
-
-AC_CHECK_HEADER(readline/readline.h,
-    [READLINE_CFLAGS=-I/usr/include/readline/],	AC_MSG_ERROR([
-
-You need the GNU Readline headers to build this program.
-
-]))
-
-READLINE_LIBS="$READLINE_LIBS $READLINE_EXTRA"
-
-AC_SUBST(READLINE_LIBS)
-AC_SUBST(READLINE_CFLAGS)
-
 dnl Checks for header files.
 AC_HEADER_STDC
 AC_CHECK_HEADERS(unistd.h)
diff --git a/src/Makefile.am b/src/Makefile.am
index 75f16de..4900c93 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -19,7 +19,7 @@ bin_PROGRAMS = gnurobots
 
 AM_CFLAGS = -pedantic-errors -Werror -Wall
 
-INCLUDES = $(GUILE_CFLAGS) $(READLINE_CFLAGS) $(GTK2_CFLAGS) \
+INCLUDES = $(GUILE_CFLAGS) $(GTK2_CFLAGS) \
 	$(VTE_CFLAGS) $(GTHREAD2_CFLAGS) \
 	-I$(top_builddir)/include \
    	-DPKGLIBDIR=\"$(pkglibdir)\" \
@@ -30,5 +30,5 @@ INCLUDES = $(GUILE_CFLAGS) $(READLINE_CFLAGS) $(GTK2_CFLAGS) \
 
 gnurobots_SOURCES = main.c api.c map.c grobot.c \
 	ui-window.c ui-cmdwin.c ui-arena.c
-gnurobots_LDFLAGS = $(GUILE_LDFLAGS) $(READLINE_LIBS) $(GTHREAD2_LIBS) \
+gnurobots_LDFLAGS = $(GUILE_LDFLAGS) $(GTHREAD2_LIBS) \
 	$(GTK2_LIBS) $(VTE_LIBS) -lutil
diff --git a/src/ui-cmdwin.c b/src/ui-cmdwin.c
index 003b845..f48e72f 100644
--- a/src/ui-cmdwin.c
+++ b/src/ui-cmdwin.c
@@ -22,8 +22,6 @@
 #include <pty.h>
 
 #include <vte/vte.h>
-#include <readline/readline.h>
-#include <history.h>
 
 struct _UICmdWinPrivate
 {
-- 
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