[Buildroot] [PATCH] Makefile: work around a bug in newly released make 4.3

Yann E. MORIN yann.morin.1998 at free.fr
Wed Mar 4 12:53:30 UTC 2020


Several users of rolling-release distributions have been reporting on
IRC that Buildroot is broken now that they have switched to the newly
released make 4.3.

It turns out that the constructs we use to generated and ionclude the
internal br2-external related fragments is no longer working with
make-4.3.

Indeed, an upstream bug report [0] seems to imply that it so far was
working by chance. There has been no further feedback, whether this is
really considered a fix or a regression...

In the meantime, we add a workaround that fixes the issue, and should
not break on older make versions either (verified on all relevant
versions: 3.81, 3.82, 4.0, 4.1, and 4.2).

Signed-off-by: Yann E. MORIN <yann.morin.1998 at free.fr>
---
 Makefile | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Makefile b/Makefile
index 31624f77a2..c22c1d8980 100644
--- a/Makefile
+++ b/Makefile
@@ -188,6 +188,9 @@ ifneq ($(BR2_EXTERNAL_ERROR),)
 $(error $(BR2_EXTERNAL_ERROR))
 endif
 
+# Workaround bug #57676 in make-4.3
+$(BASE_DIR)/.br2-external.mk:;
+
 # To make sure that the environment variable overrides the .config option,
 # set this before including .config.
 ifneq ($(BR2_DL_DIR),)
-- 
2.20.1



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