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When we use Buildroot's re2 package to build qt5webengine, there is an issue at link time as the qt5webengine mistakenly uses the abseil-cpp headers of its built-in copy rather than the ones of our abseil-cpp library, built as a dependency of re2. However, we build our abseil-cpp differently than the one bundled, and that causes some conflicts. Since teaching Chromium's build system to not use its own abseil-cpp headers is an adventure we'd rather not engage into, we fallback to use the bundled re2. Therefore, we drop in Config.in all dependencies that were inherited from Buildroot's re2 package. This warrants a few comments: - BR2_PACKAGE_LIBABSEIL_CPP_ARCH_SUPPORTS should be dropped because the list of architectures supported by our Buildroot abseil-cpp package may be different than the set of architectures supported by the bundled abseil-cpp in Chromium. In addition, the list of architectures in BR2_PACKAGE_QT5WEBENGINE_ARCH_SUPPORTS is also a very limited subset of BR2_PACKAGE_LIBABSEIL_CPP_ARCH_SUPPORTS, so this change will not expose the build of qt5webengine to additional architectures. - We're dropping BR2_TOOLCHAIN_GCC_AT_LEAST_8 because it was inherited from re2. The main qt5 package anyway depends on gcc >= 5.x. We will figure out thanks to the autobuilders exactly which gcc version is needed. Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.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 OFTC IRC. If you would like to contribute patches, please read https://buildroot.org/manual.html#submitting-patches