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The check_musl function currently builds a program and verifies if the program interpreter starts with /lib/ld-musl. While this works fine for dynamically linked programs, this obviously doesn't work for a purely static musl toolchain such as [1]. There is no easy way to identify a toolchain as using the musl C library. For glibc, dynamic linking is always supported, so we look at the dynamic linker name. For uClibc, there is a distinctive uClibc_config.h header file. There is no such distinctive feature in musl. We end up resorting to looking for the string MUSL_LOCPATH, which is used by musl locale_map.c source file. This string has been present in musl since 2014. It certainly isn't a very stable or convincing solution to identify the C library as being musl, but it's the best we could find. Note that we are sure there is a libc.a file, because the check_unusable_toolchain function checks that there is a such a file. [1] http://autobuild.buildroot.net/toolchains/tarballs/br-arm-musl-static-2018.05.tar.bz2 Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com> Reviewed-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be> 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 Freenode IRC. If you would like to contribute patches, please read https://buildroot.org/manual.html#submitting-patches