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In 2016 buildroot commitb4c050e9afadded -std=gnu++98 also to CFLAGS knowing that it will cause warnings: https://lists.nongnu.org/archive/html/gpsd-dev/2016-09/msg00082.html 'Although this leads to lots of warnings on every compilation with gcc: "cc1: warning: command line option '-std=gnu++98' is valid for C++/ObjC++ but not for C"' These warnings are still present but cause a misdetection in configure Checking if strerror_r() returns int... no because here warnings are treated as errors, quoting config.log: cc1: error: command-line option ‘-std=gnu++98’ is valid for C++/ObjC++ but not for C [-Werror] cc1: all warnings being treated as errors In 2017 upstream committedd287c76f4fwhich added "std::" namespace prefixes and fixed the original problem. -std=gnu++98 being removed from CFLAGS lets configure correctly detect strerror_r(): Checking if strerror_r() returns int... yes and no new build errors occur: arm-aarch64 [ 1/35]: OK bootlin-aarch64-glibc [ 2/35]: OK bootlin-arcle-hs38-uclibc [ 3/35]: OK bootlin-armv5-uclibc [ 4/35]: OK bootlin-armv7-glibc [ 5/35]: OK bootlin-armv7m-uclibc [ 6/35]: SKIPPED bootlin-armv7-musl [ 7/35]: OK bootlin-m68k-5208-uclibc [ 8/35]: SKIPPED bootlin-m68k-68040-uclibc [ 9/35]: OK bootlin-microblazeel-uclibc [10/35]: OK bootlin-mipsel32r6-glibc [11/35]: OK bootlin-mipsel-uclibc [12/35]: OK bootlin-openrisc-uclibc [13/35]: OK bootlin-powerpc64le-power8-glibc [14/35]: OK bootlin-powerpc-e500mc-uclibc [15/35]: OK bootlin-riscv32-glibc [16/35]: OK bootlin-riscv64-glibc [17/35]: OK bootlin-riscv64-musl [18/35]: OK bootlin-s390x-z13-glibc [19/35]: OK bootlin-sh4-uclibc [20/35]: OK bootlin-sparc64-glibc [21/35]: OK bootlin-sparc-uclibc [22/35]: OK bootlin-x86-64-glibc [23/35]: OK bootlin-x86-64-musl [24/35]: OK bootlin-x86-64-uclibc [25/35]: OK bootlin-x86-i686-musl [26/35]: OK bootlin-xtensa-uclibc [27/35]: OK br-arm-basic [28/35]: SKIPPED br-arm-full-nothread [29/35]: SKIPPED br-arm-full-static [30/35]: SKIPPED br-i386-pentium4-full [31/35]: FAILED br-mips64-n64-full [32/35]: OK br-mips64r6-el-hf-glibc [33/35]: OK br-powerpc-603e-basic-cpp [34/35]: SKIPPED br-powerpc64-power7-glibc [35/35]: OK 35 builds, 6 skipped, 1 build failed, 0 legal-info failed, 0 show-info failed The br-i386-pentium4-full error is not caused by gpsd: package/python3/python3.mk:324: *** Python3 doesn't work with uClibc and kernel headers < 5.1. Please use a different toolchain or unselect Python3.. Fixes: https://autobuild.buildroot.org/results/52d747d33d714ea10b9e7ee10adeadd9e4512c2d/ Signed-off-by: Bernd Kuhls <bernd@kuhls.net> Tested-by: Yann E. MORIN <yann.morin@orange.com> Reviewed-by: Yann E. MORIN <yann.morin@orange.com> Signed-off-by: Peter Korsgaard <peter@korsgaard.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