Dear Ian,
Welcome to coreboot! Am Samstag, den 09.09.2017, 16:31 -0700 schrieb Ian Kelling: > 1. building 4.6 gives build erro > > $ make crossgcc-x64 BUILDGCC_OPTIONS=-b CPUS=16 > $ make > […] > HOSTCC cbfstool/lz4hc.o > HOSTCC cbfstool/lz4frame.o > /nocow/t/coreboot-4.6/util/cbfstool/lz4/lib/lz4frame.c: In function > 'LZ4F_decompress': > /nocow/t/coreboot-4.6/util/cbfstool/lz4/lib/lz4frame.c:1092:33: error: this > statement may fall through [-Werror=implicit-fallthrough=] > dctxPtr->dStage = dstage_storeHeader; > ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~ > /nocow/t/coreboot-4.6/util/cbfstool/lz4/lib/lz4frame.c:1095:9: note: here > case dstage_storeHeader: > ^~~~ > cc1: all warnings being treated as errors > util/cbfstool/Makefile.inc:133: recipe for target > 'build/util/cbfstool/lz4frame.o' failed > make: *** [build/util/cbfstool/lz4frame.o] Error 1 Something is wrong with your environment. The error is fixed by commit 54fd92bc (util/cbfstool/lz4frame.c: Add comment to fall through). But as I remember, and as the commit message applaudably documents, this warning is only shown with GCC 7. The coreboot toolchain of the coreboot 4.6 release still uses GCC 6(?), but definitely not 7. I suggest you delete `.xcompile`, and if that doesn’t work, please start from scratch, and give more information. Building with `make V=1` will also show you, what programs get called. […] Thanks, Paul
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