SNMP MIB->YANG translation file handling.

Added configure option  --with-mib-generated-yang-dir=DIR with
default value /usr/share/mibyang where generated YANGs from MIBs
should be placed so that SNMP tests know where to find the YANGs.

configure

@@ -632,6 +632,7 @@ ac_ct_CXX
 CXXFLAGS
 CXX
 CPP
+MIB_GENERATED_YANG_DIR
 YANG_STANDARD_DIR
 YANG_INSTALLDIR
 CLIXON_YANG_PATCH
@@ -724,6 +725,7 @@ with_restconf
 enable_http1
 enable_nghttp2
 enable_netsnmp
+with_mib_generated_yang_dir
 with_configfile
 with_libxml2
 with_sigaction
@@ -1387,6 +1389,9 @@ Optional Packages:
   --with-restconf=fcgi    FCGI interface for stand-alone web rev-proxy eg
                           nginx
   --without-restconf      Disable restconf altogether
+  --with-mib-generated-yang-dir=DIR
+                          Directory of generated YANG specs (default:
+                          $prefix/share/mibyang)
   --with-configfile=FILE  Set default path to config file
   --with-libxml2          Use gnome/libxml2 regex engine
   --without-sigaction     Don't use sigaction
@@ -3400,6 +3405,8 @@ HAVE_HTTP1=false
 
 # Examples require standard IETF YANGs. You need to provide these for example and tests
 
+# SNMP tests require generated YANGs from MIBs
+
 
 #
 ac_ext=c
@@ -5429,6 +5436,23 @@ fi
 
 done
 
+
+
+   # MIB_GENERATED_YANG_DIR is where clixon assumes generated YANGs from MIBs are stored
+   # This is NOT installed by Clixon and is not needed for core system
+   # However, it is required by SNMP tests.
+   # To generate: for i in /usr/share/snmp/mibs/*; do smidump -f yang $i > `basename -s .txt $i`.yang; done
+
+# Check whether --with-mib-generated-yang-dir was given.
+if test "${with_mib_generated_yang_dir+set}" = set; then :
+  withval=$with_mib_generated_yang_dir; MIB_GENERATED_YANG_DIR="$withval"
+else
+  MIB_GENERATED_YANG_DIR="${prefix}/share/mibyang"
+
+fi
+
+    { $as_echo "$as_me:${as_lineno-$LINENO}: result: Generated YANGs from MIB files are expected to be in ${MIB_GENERATED_YANG_DIR}" >&5
+$as_echo "Generated YANGs from MIB files are expected to be in ${MIB_GENERATED_YANG_DIR}" >&6; }
 fi
 
 # Set default config file location