From 120ae6091d44dae9b63f4c4e2a14ba7b15432bbb Mon Sep 17 00:00:00 2001
From: =?utf8?q?Beno=C3=AEt=20Th=C3=A9baudeau?=
 <benoit.thebaudeau@advansee.com>
Date: Thu, 11 Apr 2013 09:35:54 +0000
Subject: [PATCH] Makefile: Move SHELL setup to config.mk
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make never uses the SHELL variable from the environment. Instead, it
uses /bin/sh, or the value assigned to the SHELL variable by the Makefile. This
makes the export of the SHELL variable useless for sub-makes (but still useful
for the environment of recipes). However, we want all makes to use the same
shell.

This patch fixes this issue by moving the SHELL variable setup and export to the
top config.mk, so that all Makefile-s including it use the same shell.

Since BASH is used by default, this makes it possible to use things
like 'echo -e ...' in sub-makes, which would otherwise fail e.g. with /bin/sh
symlinked to /bin/dash on Ubuntu.

Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
Reviewed-by: Tom Rini <trini@ti.com>
---
 Makefile  | 7 +------
 config.mk | 7 +++++++
 2 files changed, 8 insertions(+), 6 deletions(-)

diff --git a/Makefile b/Makefile
index 8d0e2b8552..caca851365 100644
--- a/Makefile
+++ b/Makefile
@@ -46,12 +46,7 @@ HOSTARCH := $(shell uname -m | \
 HOSTOS := $(shell uname -s | tr '[:upper:]' '[:lower:]' | \
 	    sed -e 's/\(cygwin\).*/cygwin/')
 
-# Set shell to bash if possible, otherwise fall back to sh
-SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
-	else if [ -x /bin/bash ]; then echo /bin/bash; \
-	else echo sh; fi; fi)
-
-export	HOSTARCH HOSTOS SHELL
+export	HOSTARCH HOSTOS
 
 # Deal with colliding definitions from tcsh etc.
 VENDOR=
diff --git a/config.mk b/config.mk
index 4e6a19bd8a..1fd109f1bd 100644
--- a/config.mk
+++ b/config.mk
@@ -23,6 +23,13 @@
 
 #########################################################################
 
+# Set shell to bash if possible, otherwise fall back to sh
+SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
+	else if [ -x /bin/bash ]; then echo /bin/bash; \
+	else echo sh; fi; fi)
+
+export	SHELL
+
 ifeq ($(CURDIR),$(SRCTREE))
 dir :=
 else
-- 
2.39.5