MariaDB 10.3.0 fails to build on mips and mipsel due missing atomic ops implementation

In file included from ../include/lf.h:19:0,

                 from /«PKGBUILDDIR»/mysys/lf_alloc-pin.c:104:

../include/my_atomic.h:121:2: error: #error atomic ops for this platform are not implemented

 #error atomic ops for this platform are not implemented

  ^~~~~

../include/my_atomic.h: In function 'my_atomic_cas32':

../include/my_atomic.h:154:3: warning: implicit declaration of function 'make_atomic_cas_body' [-Wimplicit-function-declaration]

   make_atomic_cas_body(S);                                      \

   ^

../include/my_atomic.h:189:1: note: in expansion of macro 'make_atomic_cas'

 make_atomic_cas(32)

 ^~~~~~~~~~~~~~~

../include/my_atomic.h: In function 'my_atomic_casptr':

../include/my_atomic.h:191:17: error: 'ptr' undeclared (first use in this function)

 make_atomic_cas(ptr)

                 ^

../include/my_atomic.h:154:24: note: in definition of macro 'make_atomic_cas'

   make_atomic_cas_body(S);                                      \

                        ^

../include/my_atomic.h:191:17: note: each undeclared identifier is reported only once for each function it appears in

 make_atomic_cas(ptr)

                 ^

../include/my_atomic.h:154:24: note: in definition of macro 'make_atomic_cas'

   make_atomic_cas_body(S);                                      \

                        ^