introae.so

berkeley db 4.6.21的源码。berkeley db是一个简单的数据库管理系统

m4_comment([$Id: introae.so,v 1.8 2002/10/01 19:38:33 sue Exp $])

m4_ref_title(Building m4_db for VxWorks systems,
    Building for VxWorks AE, @building for VxWorks AE,
    build_vxworks/intro, build_vxworks/notes)

m4_p([dnl
The build_vxworks directory in the m4_db distribution contains component
files for Tornado 3.1.  The m4_db distribution also contains workspace
and project files for Tornado 2.X.  See
m4_link(M4RELDIR/ref/build_vxworks/intro, Building for VxWorks) for
information about Tornado 2.0/VxWorks 5.4 and Tornado 2.2/VxWorks 5.5.])

The VxWorks AE component files are all within subdirectories, and
all component files are named m4_italic(component.wpj).
m4_table_begin(, _center)
m4_table_header(File, Description)
m4_table_element(_left, m4_db/, m4_db component directory)
m4_table_element(_left, dbdemo/dbdemo, m4_link(M4RELDIR/ref/build_vxworks/notes, Demo program) component directory)
m4_table_element(_left, db_*/db_*, m4_link(M4RELDIR/ref/build_vxworks/notes, Support utilities) component directories)
m4_table_end

m4_section([Building With Tornado 3.1])
m4_p([dnl
This document assumes you already have a workspace set up and you
want to add m4_db as a component in that workspace.  You may include
this component in any domain deemed appropriate for your application.])

m4_p([dnl
To add the m4_db component into your workspace, right-click on the
"Components" and choose m4_italic(Add existing...).  Enter
the pathname to your m4_db distribution in the form
m4_italic(__LT__pathname to your m4_db distribution__GT__)
m4_bold(/build_vxworks/m4_db/).
You will see m4_bold(component.wpj) listed under the "Files".
Choose that filename and click "Ok".  You will now have
a m4_db component in your workspace.])

m4_p([dnl
There are essentially three options regarding protection
domains and the m4_db component.  The first option is to add
the m4_db component directly into your application domain.  You may
choose to do this by downloading m4_db into that domain on your
target, or by adding the component to the domain itself and it will
be built when the application domain is built.  The disadvantage
of this option is that no other application domain will have access to
the m4_db interfaces. ])

m4_p([dnl
The second option is to add the m4_db component directly into your
m4_italic(vxKernel) domain.  The advantage is that any application
using the m4_db interface would have access to them and no changes
would be necessary to the linkage path.  The disadvantage is that
all m4_db code would run with system privileges. ])

m4_p([dnl
The third option is to add a m4_db shared library domain to your
system.  Then add or download the m4_db component to that shared
library domain.  The advantage is that all application domains
using the m4_db interfaces can access a single copy of the library
running in user mode.  The disadvantages are that one must
remember to add the m4_db shared library domain to the linkage
path of every application domain using m4_db and that shared library
domains may not link against one another, a consideration if the
application using m4_db is itself a shared library.])

m4_p([dnl
We believe the options outlined above are the most common methods
that the m4_db component will be used.  We believe that the third
option, creating a shared library domain, is the most useful option.
Ultimately, the responsibility of choosing the correct mechanism
for including the m4_db component into the appropriate domain falls
to the application developer.])

m4_p([dnl
The remainder of this document assumes that you already have a
VxWorks AE target and a target server, both up and running.  It also
assumes that your VxWorks AE image is configured properly for your
needs.  It also assumes that you
have an acceptable file system already available.  See
m4_link(M4RELDIR/ref/build_vxworks/faq, VxWorks FAQ) for more
information about file system requirements.])

m4_p([dnl
To build m4_db, first, you need to set the build selection.  To do
this, right-click on the m4_db component name and choose the
m4_italic(Build settings...) selection.  If you look at the
m4_italic(Active Build Specification) drop down list, you will see
several different builds, containing different configurations. ])

m4_table_begin(, _center)
m4_table_header(Build, Description)
m4_table_element(_left, PENTIUM2gnu.debug, PII BSP with debugging)
m4_table_element(_left, PENTIUM2gnu.release, PII BSP no debugging)
m4_table_end

m4_p([dnl
You have to add a new build specification if you use a
different BSP, want to add a build for the simulator or
want to customize further.  For instance, if you have the Power PC (PPC)
BSP, you need to add a new build for the PPC tool chain.  To do so,
select the "Add..." button in the m4_italic(Build Settings) window.
A new window will appear giving you a list of all the BSPs
you have available from which to choose.
For your new build target, you need to decide whether it should be built for
debugging.  See the m4_italic(C/C++ compiler) tab of the Pentium
builds for ways to
configure for each case.  After you add this build, you still need
to configure the include directories correctly, as described in the
sections that follow.])

m4_p([dnl
If you are running with a different
BSP, you should remove the build specifications that do not apply to
your hardware.  We recommend that you do this after you configure any
new build specifications first. ])

m4_p([dnl
If you are adding a new build you must set the include directories
correctly.  After you have added the new build in the "Build Settings"
window, click on the m4_italic(C/C++ compiler) tab.
In the edit box, you need to add the pathname of the
m4_italic(build_vxworks) subdirectory of m4_db, followed by the
pathname of m4_db.  You should add these directories
relative to the project directory, using the m4_bold(PRJ_DIR)
macro, which is the m4_db subdirectory of m4_italic(build_vxworks).
Then, click OK.  The typical addition of include
directories will look like:])

m4_indent([-I$(PRJ_DIR)/.. -I$(PRJ_DIR)/../..])

m4_p([dnl
To build and download the m4_db downloadable application for the first time
requires several steps: ])

m4_nlistbegin
m4_nlist([dnl
Select the build you are interested in using the m4_italic(Build Settings)
window.  Click OK when done.])
m4_nlist([dnl
Select the m4_db component and right-click.  Choose the
m4_italic(Clean Build) selection.])
m4_nlist([dnl
Select the m4_db component and right-click.  Choose the
m4_italic(Download...) selection.])
m4_nlistend

m4_p([dnl
You need to repeat this procedure for all builds you are interested in
building, as well as for all of the utility project builds you want to
run.])

m4_page_footer