[Buildroot] [PATCH 1/3] package/libks: select BR2_PACKAGE_LIBOPENSSL_ENGINES

[Bernd Kuhls]

libks makes use of ERR_* functions defined in openssl/err.h which are
included by openssl/engine.h resulting in a build failure when
!BR2_PACKAGE_LIBOPENSSL_ENGINES since commit
623d3bbe43e9193aa8e3395367d01af59071b859:

/home/buildroot/instance-0/output-1/build/libks-2.0.5/src/ks_ssl.c:111:17:
 error: implicit declaration of function 'ERR_free_strings'; did you mean
 'ERR_load_EC_strings'? [-Wimplicit-function-declaration]
  111 |                 ERR_free_strings();

Fixes:
https://autobuild.buildroot.net/results/aac/aac25e5c584ede962cac95c353afd64bf720199c/

The oldest build error on the master branch dates back to Feb 2025:
https://autobuild.buildroot.net/results/83a/83a207bee796afbc619b62c5ecf89c662484170f/
so a backport to LTS branches should be considered.

Signed-off-by: Bernd Kuhls <bernd at kuhls.net>
---
 package/libks/Config.in | 1 +
 1 file changed, 1 insertion(+)

diff --git a/package/libks/Config.in b/package/libks/Config.in
index 4781d188bf..17a008d7a0 100644
--- a/package/libks/Config.in
+++ b/package/libks/Config.in
@@ -4,6 +4,7 @@ config BR2_PACKAGE_LIBKS
 	depends on !BR2_STATIC_LIBS # dlfcn.h
 	depends on BR2_TOOLCHAIN_HAS_THREADS_NPTL # pthread_setname_np()
 	select BR2_PACKAGE_OPENSSL
+	select BR2_PACKAGE_LIBOPENSSL_ENGINES if BR2_PACKAGE_LIBOPENSSL
 	select BR2_PACKAGE_UTIL_LINUX
 	select BR2_PACKAGE_UTIL_LINUX_LIBUUID
 	help
-- 
2.47.3