Add a patch from the upstream AutoGen package that allows POSIX_SHELL
to be taken from the environment, then define that to be '/bin/sh'.
Since we are cross-compiling, the original behaviour of detecting the
host shell is not useful as we cannot assume that the target uses the
same shell, and it can prevent builds being reproducible because a
different host environment will result in a different target binary.
Signed-off-by: James Byrne <james.byrne@origamienergy.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
--- /dev/null
+sntp/libopts/m4/libopts.m4: allow override shell with POSIX_SHELL
+
+Pull in fix from upstream AutoGen [1] to accept POSIX_SHELL from the
+environment during the configure step.
+
+[1] http://git.savannah.gnu.org/cgit/autogen.git/commit/?id=db064b9a252f3ef3d8db25411ea0edb0ff8ea758
+
+Signed-off-by: James Byrne <james.byrne@origamienergy.com>
+
+diff --git a/sntp/libopts/m4/libopts.m4 b/sntp/libopts/m4/libopts.m4
+--- a/sntp/libopts/m4/libopts.m4
++++ b/sntp/libopts/m4/libopts.m4
+@@ -114,6 +114,7 @@
+ AC_PROG_SED
+ [while :
+ do
++ test -x "$POSIX_SHELL" && break
+ POSIX_SHELL=`which bash`
+ test -x "$POSIX_SHELL" && break
+ POSIX_SHELL=`which dash`
NTP_DEPENDENCIES = host-pkgconf libevent
NTP_LICENSE = NTP
NTP_LICENSE_FILES = COPYRIGHT
-NTP_CONF_ENV = ac_cv_lib_md5_MD5Init=no
+NTP_CONF_ENV = ac_cv_lib_md5_MD5Init=no POSIX_SHELL=/bin/sh
NTP_CONF_OPTS = \
--with-shared \
--program-transform-name=s,,, \