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Create the staging symlink the same way as the host symlink. This means using a make dependency rather than recreating it every time. In coreutils versions below 8.27, re-creation of symbolic links was not atomic. This means that there is a period in time where the existing link is removed, before the new one is created. In coreutils 8.27 this was fixed, see [1]. Note that CentOS 7 ships with coreutils 8.22. In the following scenario, this is a problem: - an application is compiled using the sysroot prepared by Buildroot and links against Xenomai userspace libraries, but its build process is steered from outside of Buildroot - to know the correct flags, the application makefile uses the 'xeno-config' file to request them, and passes DESTDIR=/buildroot/output/staging - the xeno-config responds with flags based on the path '/buildroot/output/staging/...' - while the application build is ongoing, a 'make' happens in Buildroot, causing the 'staging' symlink to be recreated (even though it already existed) - when exactly at this time, the application calls the compiler with -I flags pointing to output/staging, the build fails with: -I/buildroot/output/staging/usr/include/xenomai/mercury: Error: ^ is not a directory -I/buildroot/output/staging/usr/include/xenomai: Error: ^ is not a directory -I/buildroot/output/staging/usr/include/xenomai/xenomai: Error: ^ is not a directory -I/buildroot/output/staging/usr/include/xenomai/psos: Error: ^ is not a directory Failed: ** ^ * Work around this problem by only creating the staging symlink once, similar to how the host symlink (if any) is created. See also commit |
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| arch | ||
| board | ||
| boot | ||
| configs | ||
| docs | ||
| fs | ||
| linux | ||
| package | ||
| support | ||
| system | ||
| toolchain | ||
| utils | ||
| .defconfig | ||
| .flake8 | ||
| .gitignore | ||
| .gitlab-ci.yml | ||
| .gitlab-ci.yml.in | ||
| CHANGES | ||
| Config.in | ||
| Config.in.legacy | ||
| COPYING | ||
| DEVELOPERS | ||
| Makefile | ||
| Makefile.legacy | ||
| README | ||
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