From: Rusty Russell <rusty@rustcorp.com.au>
Date: Tue, 27 Mar 2012 03:45:16 +0000 (+1030)
Subject: Makefile: generate config.h in two stages
X-Git-Url: https://git.ozlabs.org/?p=ccan;a=commitdiff_plain;h=b175cfcf866c0f2ab72b7eb6a24aa4d13bb387e4

Makefile: generate config.h in two stages

This means we don't create an empty file if configurator fails.
---

diff --git a/Makefile b/Makefile
index 570793c7..13aa195d 100644
--- a/Makefile
+++ b/Makefile
@@ -122,8 +122,9 @@ inter-depends: $(ALL_DEPENDS) Makefile
 test-depends: $(ALL_DEPENDS) Makefile
 	for f in $(ALL_DEPENDS); do echo check-`basename \`dirname $$f\``: `sed -n 's,ccan/\(.*\),check-\1,p' < $$f`; done > $@
 
+# Ensure we don't end up with empty file if configurator fails!
 config.h: tools/configurator/configurator Makefile Makefile-ccan
-	@tools/configurator/configurator $(CC) $(CCAN_CFLAGS) > config.h
+	tools/configurator/configurator $(CC) $(CCAN_CFLAGS) > $@ || rm -f $@
 
 include tools/Makefile
 -include inter-depends