How can I remove file system

[Joel Sherrill]

yanmiaobest wrote:
> Hi Jeol,
> You mean that I have to modify the source code, right?
Ideally no.
> Is there some way that I can skip compiling the file system,
> or compile but don't link them into exe file through modifying
> makefile or linkcmd?
Compile but not link is our goal.

Start by defining CONFIGURE_HAS_OWN_MOUNT_TABLE and not
defining one. Then you will have to look at having
stub replacements for the following to meet your needs:

+ cpukit/libcsupport/src/base_fs.c - rtems_filesystem_initialize
+ Maybe libio_initialization in libio_init.c

The goal is to get your program to link with stubs and
not pull in the full code. Your stub might have more in it
than you like but if you get a stub which really does
prevent filesystem code from coming in, I can look at your
stub and possibly trim it by careful surgery on the
files it is stubbing out.

Ray is getting pretty good at this and should have
suggestions as well. :)

--joel
>
> 2007-06-05£¬"Joel Sherrill" <joel.sherrill at oarcorp.com> wrote£º
>
>     yanmiaobest wrote:
>     > Hi,
>     > How can I remove file system out of my exe file?
>     > Is there a way to disable it, like --disable-fs?
>     > Or do I have to modify makefile ?
>     This is still an open project. There are some brief notes
>     on it at http://www.rtems.com/wiki/index.php/TinyRTEMS.
>
>     There are at least two approaches -- one is to have no
>     "section 2" IO support or filesystem. The other is to
>     have a pluggable module that provides the 4.0.0 device
>     name to major/minor mapping similar to what was
>     in old RTEMS versions.
>
>     You have to start by carving at the mount table
>     and filesystem initialization routines. Having
>     replacement stubs is a first step.
>
>     --joel
>     >
>     >
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