home *** CD-ROM | disk | FTP | other *** search
-
- How to create a new machine type from an existing one.
-
- This document covers how to create a new machine type from an existing
- machine type. Creating a new machine type allows you to create
- kernels for that are personalized in some manner. This is useful for
- testing kernel changes without affecting sources for kernels that other
- people are using. This document does not discuss how to add a new machine
- architecture to the system.
-
- The first step is to chose a name for your new machine type. I suggest
- a unique name that is not used as the name of any files or directories
- in the system. This avoids confusing "make" when you type "make <machine>".
- Your login is a particularly bad choice. Not only does it confuse "make",
- but it also confuses people. Let's assume that your new machine type is
- "foo", and the original machine type is "sun3".
-
- Edit /sprite/lib/pmake/tm.mk. Make entries for foo from the entries
- for sun3. Add a flag "-Dsun3" to the TMCFLAGS for foo. Don't modify the
- "-m" flag entry.
-
- Create a foo.md directory in /sprite/lib/include or make a symbolic
- link to sun3.md. If you create a directory then make symbolic links from foo.md
- to all files in sun3.md.
-
- Create a foo.md directory in /sprite/src/kernel/Include. Make symbolic
- links to all the files in sun3.md. Make a symbolic link from foo.md/user
- to /sprite/lib/include/foo.md.
-
- Create a foo.md subdirectory in each module of the kernel. Create a
- symbolic link to each source file in sun3.md to foo.md. This includes
- program sources as well as things like "md.mk.sed". Find all references
- to TM=sun3 in local.mk files and add TM=foo as well. for example,
- "!empty(TM:Msun3)".
-
- Run "mkmf" or "mkmf -m foo" in each module.
-