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While building the rust toolchain, the build system ends up using cargo (from [...]/output/build/host-rust-bin-1.74.1/cargo/bin/cargo) to build some tools like rustdoc-tool. But the host-rust package doesn't use the cargo infractructure (since it provides cargo binary) and our cargo environment variables [1] are not set to crosscompile cargo packages in the rust toolchain. For exemple, we usually set RUSTFLAGS="-C link-arg=-Wl,-rpath,$(HOST_DIR)/lib" to force cargo using libraries provided by Buildroot in $(HOST_DIR)/lib. RUSTFLAGS is actually needed to find zlib library (host-zlib) to link rustdoc-tool when zlib is not installed on the host. Add $(HOST_PKG_CARGO_ENV) in HOST_RUST_BUILD_CMDS since it already includes RUSTFLAGS but also CARGO_HOME. Fixes: error: could not compile `rustdoc-tool` (bin "rustdoc_tool_binary") due to previous error [1] https://gitlab.com/buildroot.org/buildroot/-/blob/2024.02-rc1/package/pkg-cargo.mk#L165 Signed-off-by: Romain Naour <romain.naour@smile.fr> Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
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