1. download https://github.com/thesofproject/sof/archive/v1.2.tar.gz;
   2)unzip it in local and follow the building steps:
   $autogen.sh
   $./configure --enable-rimage
   $make
   will meet below error:
   man_apl.c:64:30: error: expected expression before ‘,’ token
   .major_version = SOF_MAJOR,
   ^

It was due to there is no git tag by directly tar ball building. May refer to below script from version.sh.
GIT_TAG=git describe --abbrev=4 2>/dev/null

So need specify or get the correct version under tar ball building environment.