shadow: improve reproducibility by hard-coding shell path

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

(From OE-Core rev: 5f4fe91cb6c21cd3ecd0b68d1c6b46a9530c7570)

Signed-off-by: Martin Hundebøll <martin@geanix.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 2 insertions, 0 deletions

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 \