New comment by newbluemoon on void-packages repository

https://github.com/void-linux/void-packages/pull/21561#issuecomment-629774844

Comment:
It seems that the host-built tools to generate some header files are not found.
By moving them into the `build` directory they’re magically found again.
With following changes a cross-build was successful:
```
diff --git a/srcpkgs/mariadb/template b/srcpkgs/mariadb/template
index c0c44217b7..b87e35e49e 100644
--- a/srcpkgs/mariadb/template
+++ b/srcpkgs/mariadb/template
@@ -53,11 +53,11 @@ pre_configure() {

 pre_build() {
        if [ "$CROSS_BUILD" ]; then
-               cp bin.host/comp_err ${wrksrc}/extra
-               cp bin.host/comp_sql ${wrksrc}/scripts
-               cp bin.host/gen_lex_hash ${wrksrc}/sql
-               cp bin.host/gen_lex_token ${wrksrc}/sql
-               export PATH=${PATH}:${wrksrc}/extra:${wrksrc}/scripts:${wrksrc}/sql
+               cp bin.host/comp_err ${wrksrc}/build/extra
+               cp bin.host/comp_sql ${wrksrc}/build/scripts
+               cp bin.host/gen_lex_hash ${wrksrc}/build/sql
+               cp bin.host/gen_lex_token ${wrksrc}/build/sql
+               export PATH=${PATH}:${wrksrc}/build/extra:${wrksrc}/build/scripts:${wrksrc}/build/sql
        fi
        export LD_LIBRARY_PATH=${wrksrc}/build/storage/tokudb/ft-index/portability
        case "$XBPS_TARGET_MACHINE" in
```