On Sun, Apr 10, 2016 at 12:32 AM, Faré <fahree@gmail.com> wrote:

Dear Don,

sorry for a late reply.

The intended way to use ASDF in your case would be to use two or more
systems, that may be defined in the same .asd file (using the / syntax
to name a secondary system: roan, roan/core, roan/sqlite, etc.) or
separate .asd files (using - or . as a separator).

I like this suggestion because it lets the user decide what is to be built.

It won't scale though.

This is an excerpt from the help message of ImageMagick's configure script:

--disable-openmp do not use OpenMP

--enable-opencl enable OpenCL support

--without-threads disable threads support

--without-bzlib disable BZLIB support

--with-x use the X Window System

--without-zlib disable ZLIB support

--without-dps disable Display Postscript support

--without-fftw disable FFTW support

--without-fpx disable FlashPIX support

--without-djvu disable DjVu support

--without-fontconfig disable fontconfig support

--without-freetype disable Freetype support

--without-raqm disable Raqm support

--with-gslib enable Ghostscript library support

--with-gvc enable GVC support

--without-jbig disable JBIG support

--without-jpeg disable JPEG support

--without-lcms disable lcms (v1.1X) support

--without-openjp2 disable OpenJP2 support

--without-lqr disable Liquid Rescale support

--without-lzma disable LZMA support

--without-openexr disable OpenEXR support

--without-pango disable PANGO support

--without-png disable PNG support

--with-rsvg enable RSVG support

--without-tiff disable TIFF support

--without-webp disable WEBP support

Mark