From: Rusty Russell <rusty@rustcorp.com.au>
Date: Wed, 21 Nov 2012 23:38:53 +0000 (+1030)
Subject: Makefile: generate config.h more carefully
X-Git-Url: http://git.ozlabs.org/?p=ccan;a=commitdiff_plain;h=c07a2b209d44273098e2d435ebdca82f158c0373

Makefile: generate config.h more carefully

Don't risk reading partially-constructed files.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
---

diff --git a/Makefile b/Makefile
index 0101fe06..b36aca6b 100644
--- a/Makefile
+++ b/Makefile
@@ -129,7 +129,7 @@ FORCE:
 
 # 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) > $@ || rm -f $@
+	tools/configurator/configurator $(CC) $(CCAN_CFLAGS) > $@.tmp && mv $@.tmp $@
 
 include tools/Makefile
 -include inter-depends