From 0320ea2616792feaeadf9aa2857debc33417f30f Mon Sep 17 00:00:00 2001
From: Kaz Kylheku <kaz@kylheku.com>
Date: Thu, 12 Apr 2018 20:01:55 -0700
Subject: build: compiling Lisp requires ./txr to exist.

* Makfile (%.tlo, %.tlo2): We take advantage of Gmake's
order-only prerequisites to express this dependency. This
means that .tlo and .tlo2 files are not considered outdated
when $(PROG) is newer; it only ensures that $(PROG) cannot
be missing when a .tlo or .tlo2 must be updated.
---
 Makefile | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index 8d5a8314..b8cc40fb 100644
--- a/Makefile
+++ b/Makefile
@@ -186,10 +186,10 @@ opt/%-win.o: $(top_srcdir)%.c
 win/%.res: $(top_srcdir)win/%.rc $(top_srcdir)win/%.ico
 	$(call WINDRES)
 
-%.tlo: %.tl
+%.tlo: %.tl | $(PROG)
 	$(call COMPILE_TL)
 
-%.tlo2: %.tl
+%.tlo2: %.tl | $(PROG)
 	$(call COMPILE_TL)
 	$(call SH,F=$@ T=$${F%.tlo2}.tlo; cmp -s $$F $$T || cp $$F $$T)
 
-- 
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