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We use a separate make target to build a relocatable SDK. We first
sanitize the RPATH in host tree. Next we also sanitize the
staging tree. Therefore "sdk" must depend on world.
Sanitizing staging is not really needed, in the sense that any rpath
in there is simply not going to be used. We want to sanitize staging
for the following reasons:
- To avoid leaking references to the original output directory. This
way, we can validate that the SDK is relocatable by running a simple
"grep -r ${BASE_DIR} ${HOST_DIR}". Obviously RPATH sanitization is
not sufficient (e.g. also the references to source files have to be
stripped), but it's a step in the right direction. This reason is
obviously only relevant for the SDK.
- To make sure that when an executable is copied to target that it
actually executes correctly. Since within Buildroot we never copy
stuff from staging to target, this is clearly only relevant for
the SDK.
Finally we install the script "relocate-sdk.sh" into the top directory
of the SDK (HOST_DIR) and the SDK location path is stored in the file
"HOST_DIR/share/buildroot/sdk-location"-
Signed-off-by: Wolfgang Grandegger <wg@grandegger.com>
Reviewed-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Buildroot is a simple, efficient and easy-to-use tool to generate embedded Linux systems through cross-compilation. The documentation can be found in docs/manual. You can generate a text document with 'make manual-text' and read output/docs/manual/manual.text. Online documentation can be found at http://buildroot.org/docs.html To build and use the buildroot stuff, do the following: 1) run 'make menuconfig' 2) select the target architecture and the packages you wish to compile 3) run 'make' 4) wait while it compiles 5) find the kernel, bootloader, root filesystem, etc. in output/images You do not need to be root to build or run buildroot. Have fun! Buildroot comes with a basic configuration for a number of boards. Run 'make list-defconfigs' to view the list of provided configurations. Please feed suggestions, bug reports, insults, and bribes back to the buildroot mailing list: buildroot@buildroot.org You can also find us on #buildroot on Freenode IRC. If you would like to contribute patches, please read https://buildroot.org/manual.html#submitting-patches