From c49765553ffc352e678684703c513351d418969e Mon Sep 17 00:00:00 2001
From: Rusty Russell <rusty@rustcorp.com.au>
Date: Thu, 7 Jun 2018 06:10:26 +0930
Subject: [PATCH] Makefile: not running configure first is so yesterday:

Make should only run configure if config.var already exists:

    $ make
    ./configure --reconfigure
    ./configure: 65: .: config.vars: not found
    ./configure --reconfigure
    ./configure: 65: .: config.vars: not found
    Makefile:179: recipe for target 'ccan/config.h' failed
    make: *** [ccan/config.h] Error 2
---
 Makefile | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Makefile b/Makefile
index 6d164e015..030fb55ea 100644
--- a/Makefile
+++ b/Makefile
@@ -176,6 +176,7 @@ LDLIBS = -L/usr/local/lib -lm -lgmp -lsqlite3 -lz $(COVFLAGS)
 default: all-programs all-test-programs
 
 config.vars ccan/config.h: configure
+	@if [ ! -f config.vars ]; then echo 'The 1990s are calling: use ./configure!' >&2; exit 1; fi
 	./configure --reconfigure
 
 include external/Makefile