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d21a1ac886
Since the bump of autoconf to version 2.73 in Buildroot commit [1], the
build of target flex fails if the host compiler is too old, because
the flex build system tries to use -std=gnu23 which isn't supported by
older GCC releases, causing:
gcc: error: unrecognized command-line option '-std=gnu23'; did you mean '-std=gnu2x'?
gcc: error: unrecognized command-line option '-std=gnu23'; did you mean '-std=gnu2x'?
make[3]: *** [Makefile:1162: stage1flex-buf.o] Error 1
(Indeed the *target* flex package does build some host tools using the
host GCC compiler.)
To fix this issue, we backport an upstream commit that isn't yet in
any flex release.
Fixes:
https://autobuild.buildroot.net/results/aac730b57adb5b54964f1054de781750952ef7d4/
[1] a6e8c07a33
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
[Julien: add link to commit]
Signed-off-by: Julien Olivain <ju.o@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 https://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