Configuration to generate only `.di` (D Header file)
```
name "dheaders"
description "generates .di header file for a static library."
authors "public domain"
copyright "Public Domain. No rights reserved."
license "public domain"
configuration "staticLibrary" {
dflags "-Hf=$PACKAGE_DIR/builds/library.di"
targetName "library"
targetType "library"
targetPath "builds"
sourceFiles "library.d"
extraDependencyFiles "$PACKAGE_DIR/builds/library.di"
dflags "-o-"
}
```
[-o- Suppress generation of object file. Useful in conjuction
with -D or -H
flags.](https://dlang.org/dmd-windows.html#switch-o-)
Similarly [`buildOptions
"syntaxOnly"`](https://dub.pm/package-format-sdl#build-options)
can also be used in-place of `dflag "-o-"` they are
correspondingly the same.
```
configuration "staticLibrary" {
dflags "-Hf=$PACKAGE_DIR/builds/library.di"
targetName "library"
targetType "library"
targetPath "builds"
sourceFiles "library.d"
extraDependencyFiles "$PACKAGE_DIR/builds/library.di"
buildOptions "syntaxOnly"
}
```
