[Buildroot] [git commit branch/2023.02.x] package/nettle: add missing host-gmp dependency

[Peter Korsgaard]

commit: https://git.buildroot.net/buildroot/commit/?id=f9ac3042a04cfbc3d9cf793d1ec96173980756ac
branch: https://git.buildroot.net/buildroot/commit/?id=refs/heads/2023.02.x

Since the generic package infrastructure removed auto derivation of
host dependencies [1] (2016.08), the host dependencies must be
explicitly set.

While adding the nettle host variant [2] the gmp dependency was not
duplicated and host-nettle was built without host-gmp (or built with
gmp installed on the build machine).

While building host-gnutls required for building mkeficapsule u-boot
tool, the configure script check if Libhogweed (nettle's companion
library) is build with libgmp support.

If internal toolchain is used, luckily host-gmp is built before
building host-nettle (and host-gnutls). But when using prebuilt
external toolchain, following error shows up :

Libhogweed (nettle's companion library) 3.6 was not found. Note that you must compile nettle with gmp support.

[1] https://gitlab.com/buildroot.org/buildroot/-/commit/4bdb067e380e72c3a6cb9c6ccf3791a6cf8661e0
[2] https://gitlab.com/buildroot.org/buildroot/-/commit/dac6e3011883ce3b35cbf64ec156186153bf0032
[3] https://gitlab.com/gnutls/gnutls/-/commit/eb24bfa808ee029e9b3b198d66d29256eea3fd08

Signed-off-by: Fabien Thomas <fabien.thomas at smile.fr>
Reviewed-by: Romain Naour <romain.naour at smile.fr>
Acked-by: Romain Naour <romain.naour at smile.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni at bootlin.com>
(cherry picked from commit db3a730e8ce42b8f70f469eafe53e9e5981e57b7)
Signed-off-by: Peter Korsgaard <peter at korsgaard.com>
---
 package/nettle/nettle.mk | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/package/nettle/nettle.mk b/package/nettle/nettle.mk
index cd4a589568..01d5672e23 100644
--- a/package/nettle/nettle.mk
+++ b/package/nettle/nettle.mk
@@ -15,7 +15,7 @@ NETTLE_CPE_ID_VENDOR = nettle_project
 # with static linking
 NETTLE_CONF_OPTS = --disable-openssl
 
-HOST_NETTLE_DEPENDENCIES = host-m4
+HOST_NETTLE_DEPENDENCIES = host-m4 host-gmp
 
 # ARM assembly requires v6+ ISA
 ifeq ($(BR2_ARM_CPU_ARMV4)$(BR2_ARM_CPU_ARMV5)$(BR2_ARM_CPU_ARMV7M),y)