mariadb-10.1.17 fails to build on Alpine Linux armhf

10.1.14 built fine but when upgrading to 10.1.17 for the security fixes it fails with:

[ 75%] Building C object storage/maria/CMakeFiles/aria.dir/ma_control_file.c.o

[ 75%] Building C object storage/maria/CMakeFiles/aria.dir/ma_loghandler.c.o

[ 75%] Building CXX object storage/mroonga/CMakeFiles/mroonga.dir/lib/mrn_match_escalation_threshold_scope.cpp.o

[ 75%] Building CXX object storage/mroonga/CMakeFiles/mroonga.dir/lib/mrn_path_mapper.cpp.o

/home/buildozer/aports/main/mariadb/src/mariadb-10.1.17/sql/signal_handler.cc: In function 'void handle_fatal_signal(int)':

/home/buildozer/aports/main/mariadb/src/mariadb-10.1.17/sql/signal_handler.cc:285:21: error: 'thd' was not declared in this scope

     my_write_stderr(thd->query(), MY_MIN(65536U, thd->query_length()));

                     ^

libmysqld/CMakeFiles/sql_embedded.dir/build.make:590: recipe for target 'libmysqld/CMakeFiles/sql_embedded.dir/__/sql/signal_handler.cc.o' failed

make[2]: *** [libmysqld/CMakeFiles/sql_embedded.dir/__/sql/signal_handler.cc.o] Error 1

CMakeFiles/Makefile2:10207: recipe for target 'libmysqld/CMakeFiles/sql_embedded.dir/all' failed

make[1]: *** [libmysqld/CMakeFiles/sql_embedded.dir/all] Error 2

make[1]: *** Waiting for unfinished jobs....