Why I did it
The libyang cannot be built with the latest version of cmake.
Example: https://dev.azure.com/mssonic/build/_build/results?buildId=181862&view=logs&j=993d6e22-aeec-5c03-fa19-35ecba587dd9&t=d0538dec-1681-5ff8-bd45-c0de13be9706
[ 96%] Building CXX object swig/python2/CMakeFiles/_yang2.dir/yangPYTHON_wrap.cxx.o
/sonic/src/libyang/libyang-1.0.73/build/swig/python2/yangPYTHON_wrap.cxx:3292:33: error: expected initializer before '.' token
# define SWIG_init init_yang.so
^
/sonic/src/libyang/libyang-1.0.73/build/swig/python2/yangPYTHON_wrap.cxx:102537:1: note: in expansion of macro 'SWIG_init'
SWIG_init(void) {
^~~~~~~~~
/sonic/src/libyang/libyang-1.0.73/build/swig/python2/yangPYTHON_wrap.cxx:101971:24: warning: 'swig_const_table' defined but not used [-Wunused-variable]
static swig_const_info swig_const_table[] = {
See relative issue: #4315
How I did it
Not upgrade the cmake, change to use the dbus-python 1.2.18 which is compatible with cmake 3.13.4
How to verify it
See https://dev.azure.com/mssonic/build/_build/results?buildId=194756&view=results
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