Dropbear will use system versions of libtommath and libtomcrypt if
available. To make builds deterministic, add a PACKAGECONFIG option
to choose system libs or force use of the bundled versions.

Note that currently there are no libtommath or libtomcrypt recipes
in oe-core, so default to using the bundled versions.

Signed-off-by: Andre McCurdy <armccu...@gmail.com>
---
 meta/recipes-core/dropbear/dropbear.inc | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/meta/recipes-core/dropbear/dropbear.inc 
b/meta/recipes-core/dropbear/dropbear.inc
index cdac7ec..bda7eb8 100644
--- a/meta/recipes-core/dropbear/dropbear.inc
+++ b/meta/recipes-core/dropbear/dropbear.inc
@@ -45,6 +45,10 @@ SYSTEMD_SERVICE_${PN} = "dropbear.socket"
 SBINCOMMANDS = "dropbear dropbearkey dropbearconvert"
 BINCOMMANDS = "dbclient ssh scp"
 EXTRA_OEMAKE = 'MULTI=1 SCPPROGRESS=1 PROGRAMS="${SBINCOMMANDS} 
${BINCOMMANDS}"'
+
+PACKAGECONFIG ?= ""
+PACKAGECONFIG[system-libtom] = 
"--disable-bundled-libtom,--enable-bundled-libtom,libtommath libtomcrypt"
+
 EXTRA_OECONF += "\
  ${@bb.utils.contains('DISTRO_FEATURES', 'pam', '--enable-pam', 
'--disable-pam', d)}"
 
-- 
1.9.1

-- 
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