[Buildroot] [git commit branch/2017.02.x] sudo: fix static linking with openldap having openssl support

[Peter Korsgaard]

commit: https://git.buildroot.net/buildroot/commit/?id=fe43fddcfc91b5d9e4f4463930ae424bb48281e3
branch: https://git.buildroot.net/buildroot/commit/?id=refs/heads/2017.02.x

If we are building sudo statically and openldap was linked with openssl,
then when we link sudo with openldap we need to specify the openssl
libs, otherwise it will fail with "undefined reference" errors.

Fixes:
  http://autobuild.buildroot.net/results/ebb/ebbb4c3138b5023a0c8bd938db1932a25ba5b6fb/
  http://autobuild.buildroot.net/results/58e/58ee4fddea85f0c79b26582b04a573258e27eb47/
  http://autobuild.buildroot.net/results/051/05151c4ef7f0b3702a6cd5e6df4888d826a37431/
  http://autobuild.buildroot.net/results/b1d/b1dfae81985daee106700191fcb82387833c2e3f/
  http://autobuild.buildroot.net/results/5b4/5b42e8505856156389d480d0da19f6982cf120d8/
  http://autobuild.buildroot.net/results/30a/30a76190428f902f03bcf54ba9f1f4f4377c6fc9/
  http://autobuild.buildroot.net/results/e8c/e8c6bdc314b9a8d5de303633a3abd7b7e44beb2e/
  http://autobuild.buildroot.net/results/483/4830c69cc6a62080e1516f0d9009c2ba619c23c1/

Signed-off-by: Vicente Olivert Riera <Vincent.Riera at imgtec.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>
(cherry picked from commit bf899e50d89439b1a1bdf22bc933075958ffc108)
Signed-off-by: Peter Korsgaard <peter at korsgaard.com>
---
 package/sudo/sudo.mk | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/package/sudo/sudo.mk b/package/sudo/sudo.mk
index bb0a2b5..7f0b132 100644
--- a/package/sudo/sudo.mk
+++ b/package/sudo/sudo.mk
@@ -40,6 +40,13 @@ endif
 ifeq ($(BR2_PACKAGE_OPENLDAP),y)
 SUDO_DEPENDENCIES += openldap
 SUDO_CONF_OPTS += --with-ldap
+# If we are building sudo statically and openldap was linked with openssl, then
+# when we link sudo with openldap we need to specify the openssl libs, otherwise
+# it will fail with "undefined reference" errors.
+ifeq ($(BR2_STATIC_LIBS)$(BR2_PACKAGE_OPENSSL),yy)
+SUDO_DEPENDENCIES += host-pkgconf
+SUDO_CONF_ENV = LIBS="`$(PKG_CONFIG_HOST_BINARY) --libs libssl libcrypto`"
+endif
 else
 SUDO_CONF_OPTS += --without-ldap
 endif