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Since commitaa556e2035("utils/genrandconfig: test with BR2_OPTIMIZE_2=y"), we are doing builds at -O2 instead of -Os. This has unveiled an issue in the strsep.c file: strsep.c:65:23: error: register name not specified for 'delim' register const char *delim; This strsep.c compatibility code is compiled in if HAVE_STRSEP is not defined, but dhcpdump does not use any kind of configure script to detect the availability of strsep(). Therefore by default, it gets compiled in, and the "register" specifier used for some variable declarations in strsep.c cause build issues at -O2. A previous commit in Buildroot fromc2a7f0d605("dhcpdump: Fix strsep() feature test"), attempted to fix this problem by changing the test on HAVE_STRSEP by a test on _BSD_SOURCE. Unfortunately, _BSD_SOURCE is not meant to be tested: it's a feature macro that is meant to be *defined* by some code to tell the C library headers to expose (or not) some given functionality. So instead, we basically revert commitc2a7f0d605by dropping the patch, and pass -DHAVE_STRSEP in the CFLAGS when building dhcpdump. Fixes: http://autobuild.buildroot.net/results/7231170d3d3e3637f02382c1a0a96009b0527618/ 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