Missing files building mariadb-server. Are they important?

I am using buildroot on Debian Sid with the default openwrt branch, building for OrangePiPC. Mariadb-server was failing to build, but I got it to build by creating 3 empty files. For the last one, I got an error that *.sql was missing, so I arbitrarily created a.sql. Now I am wondering if there are some settings that need to be in these files? I can't take down my server to test if maria-db works for a while, but it did finally compile without error.

touch /home/xxx/openwrt-opi/build_dir/target-arm_cortex-a7+neon-vfpv4_musl_eabi/mariadb-10.9.3/ipkg-install/usr/share/mariadb/wsrep.cnf

touch /home/xxx/openwrt-opi/build_dir/target-arm_cortex-a7+neon-vfpv4_musl_eabi/mariadb-10.9.3/ipkg-install/usr/share/mariadb/english/errmsg.sys

touch /home/xxx/openwrt-opi/build_dir/target-arm_cortex-a7+neon-vfpv4_musl_eabi/mariadb-10.9.3/ipkg-install/usr/share/mariadb/a.sql

The buildbots succeeded in building the package (see here), how did you set up your build environment?

Good question, it got me thinking it had been a while since I checked out the prerequisites. Using this guide I installed the listed packages and can see that there are some problems. So that at very least is something I needed to attend to. Not having clang installed is probably the main culprit

The following additional packages will be installed:
  g++-10-multilib gcc-10-multilib lib32asan6 lib32atomic1 lib32gcc-10-dev lib32gomp1 lib32itm1 lib32quadmath0
  lib32stdc++-10-dev lib32ubsan1 libc6-dev-x32 libc6-x32 libx32asan6 libx32atomic1 libx32gcc-10-dev libx32gcc-s1
  libx32gomp1 libx32itm1 libx32quadmath0 libx32stdc++-10-dev libx32stdc++6 libx32ubsan1
Suggested packages:
  lib32stdc++6-10-dbg libx32stdc++6-10-dbg
The following packages will be REMOVED:
  gcc-10-aarch64-linux-gnu gcc-10-arm-linux-gnueabi gcc-aarch64-linux-gnu gcc-arm-linux-gnueabi
The following NEW packages will be installed:
  clang g++-10-multilib g++-multilib gcc-10-multilib gcc-multilib lib32asan6 lib32atomic1 lib32gcc-10-dev lib32gomp1
  lib32itm1 lib32quadmath0 lib32stdc++-10-dev lib32ubsan1 libc6-dev-x32 libc6-x32 libx32asan6 libx32atomic1
  libx32gcc-10-dev libx32gcc-s1 libx32gomp1 libx32itm1 libx32quadmath0 libx32stdc++-10-dev libx32stdc++6 libx32ubsan1