This reverts commit e5cc2819b460b20cdbf498e30e7c39791956538e. Revert this for now... Makefile writers don't seem to respect them.
BUILD STYLES ============ These shell snippets provide support for multiple build systems, i.e GNU configure, CMake, etc. A build style file must provide at least the following functions: - do_configure - do_build - do_install If a source package defines its own do_xxx() function, the function defined in the build style file is simply ignored.