[odb-users] Custom ODB compiler build rule on OSX

[Andrew Cunningham]

I am trying to create a custom build rule for the header files in my Xcode
project to call the odb compiler.
I know how to create custom build rule for a target - but it seems creating
one to actually process a subset of the headers is somehow eluding me.
As a test, I created a build rule for a specific header, but this build
rule is never call on "Build".
ideas?