[OE-core] [PATCHv2] shadow: improve reproducibility by hard-coding shell path

[Martin Hundebøll]

The shadow configure script tries really hard to detect the running
shell to make sure it doesn't do unsupported calls.

On my system the shell is detected as /bin/sh, while a build in an
ubuntu docker it resolves to /bin/bash. And since the shell path is
baked into the target binaries through config.h, the build becomes
inreproducible.

Fix reproducibility by hard-coding the shell to be /bin/sh

Signed-off-by: Martin Hundebøll <martin at geanix.com>
---

Changes since v1:
- changed hard-coded path from /bin/bash to /bin/sh

 meta/recipes-extended/shadow/shadow.inc | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/meta/recipes-extended/shadow/shadow.inc b/meta/recipes-extended/shadow/shadow.inc
index 0fa80a282a..09c37ef8a3 100644
--- a/meta/recipes-extended/shadow/shadow.inc
+++ b/meta/recipes-extended/shadow/shadow.inc
@@ -45,6 +45,8 @@ PAM_SRC_URI = "file://pam.d/chfn \
 
 inherit autotools gettext
 
+export CONFIG_SHELL="/bin/sh"
+
 EXTRA_OECONF += "--without-audit \
                  --without-libcrack \
                  --without-selinux \
-- 
2.19.1