ERROR while building vmlinux

[shiningjg]

Hello, I meet some errors when making vmlinux. [jg@localhost riscv-linux]$ make CROSS_COMPILE=riscv64-unknown-linux-gnu- ARCH=riscv64 -j4 scripts/kconfig/conf --silentoldconfig Kconfig CHK include/config/kernel.release WRAP arch/riscv/include/generated/asm/bugs.h WRAP arch/riscv/include/generated/asm/cacheflush.h WRAP arch/riscv/include/generated/asm/checksum.h WRAP arch/riscv/include/generated/asm/clkdev.h WRAP arch/riscv/include/generated/asm/current.h WRAP arch/riscv/include/generated/asm/cputime.h CHK include/generated/uapi/linux/version.h UPD include/generated/uapi/linux/version.h WRAP arch/riscv/include/generated/asm/div64.h WRAP arch/riscv/include/generated/asm/dma.h WRAP arch/riscv/include/generated/asm/emergency-restart.h WRAP arch/riscv/include/generated/asm/errno.h WRAP arch/riscv/include/generated/asm/exec.h WRAP arch/riscv/include/generated/asm/fb.h WRAP arch/riscv/include/generated/asm/fcntl.h WRAP arch/riscv/include/generated/asm/ftrace.h WRAP arch/riscv/include/generated/asm/futex.h WRAP arch/riscv/include/generated/asm/hardirq.h WRAP arch/riscv/include/generated/asm/hash.h WRAP arch/riscv/include/generated/asm/hw_irq.h WRAP arch/riscv/include/generated/asm/ioctl.h WRAP arch/riscv/include/generated/asm/ioctls.h WRAP arch/riscv/include/generated/asm/ipcbuf.h WRAP arch/riscv/include/generated/asm/irq_regs.h WRAP arch/riscv/include/generated/asm/irq_work.h WRAP arch/riscv/include/generated/asm/kdebug.h WRAP arch/riscv/include/generated/asm/kmap_types.h WRAP arch/riscv/include/generated/asm/local.h WRAP arch/riscv/include/generated/asm/kvm_para.h WRAP arch/riscv/include/generated/asm/mm-arch-hooks.h WRAP arch/riscv/include/generated/asm/mman.h WRAP arch/riscv/include/generated/asm/module.h WRAP arch/riscv/include/generated/asm/msgbuf.h WRAP arch/riscv/include/generated/asm/mutex.h WRAP arch/riscv/include/generated/asm/param.h WRAP arch/riscv/include/generated/asm/percpu.h WRAP arch/riscv/include/generated/asm/poll.h WRAP arch/riscv/include/generated/asm/posix_types.h WRAP arch/riscv/include/generated/asm/preempt.h WRAP arch/riscv/include/generated/asm/resource.h WRAP arch/riscv/include/generated/asm/scatterlist.h WRAP arch/riscv/include/generated/asm/sections.h WRAP arch/riscv/include/generated/asm/sembuf.h WRAP arch/riscv/include/generated/asm/shmbuf.h WRAP arch/riscv/include/generated/asm/shmparam.h WRAP arch/riscv/include/generated/asm/signal.h WRAP arch/riscv/include/generated/asm/socket.h WRAP arch/riscv/include/generated/asm/sockios.h WRAP arch/riscv/include/generated/asm/stat.h WRAP arch/riscv/include/generated/asm/statfs.h WRAP arch/riscv/include/generated/asm/swab.h WRAP arch/riscv/include/generated/asm/termbits.h WRAP arch/riscv/include/generated/asm/termios.h WRAP arch/riscv/include/generated/asm/topology.h WRAP arch/riscv/include/generated/asm/trace_clock.h WRAP arch/riscv/include/generated/asm/types.h WRAP arch/riscv/include/generated/asm/user.h WRAP arch/riscv/include/generated/asm/unaligned.h WRAP arch/riscv/include/generated/asm/vga.h WRAP arch/riscv/include/generated/asm/vmlinux.lds.h WRAP arch/riscv/include/generated/asm/xor.h WRAP arch/riscv/include/generated/uapi/asm/setup.h HOSTCC scripts/dtc/dtc.o HOSTCC scripts/dtc/flattree.o CC scripts/mod/empty.o riscv64-unknown-linux-gnu-gcc: error: unrecognized command line option '-mstrict-align'; did you mean '-Wstrict-aliasing'? make[2]: *** [scripts/mod/empty.o] Error 1 make[1]: *** [scripts/mod] Error 2 make[1]: *** Waiting for unfinished jobs.... HOSTCC scripts/dtc/fstree.o HOSTCC scripts/dtc/data.o HOSTCC scripts/dtc/livetree.o HOSTCC scripts/dtc/treesource.o HOSTCC scripts/dtc/srcpos.o HOSTCC scripts/dtc/checks.o scripts/dtc/checks.c: In function ‘check_simple_bus_reg’: scripts/dtc/checks.c:876:2: warning: format ‘%zx’ expects argument of type ‘size_t’, but argument 4 has type ‘uint64_t’ [-Wformat=] snprintf(unit_addr, sizeof(unit_addr), "%zx", reg); ^ scripts/dtc/checks.c:876:2: warning: format ‘%zx’ expects argument of type ‘size_t’, but argument 4 has type ‘uint64_t’ [-Wformat=] HOSTCC scripts/dtc/util.o SHIPPED scripts/dtc/dtc-lexer.lex.c SHIPPED scripts/dtc/dtc-parser.tab.h SHIPPED scripts/dtc/dtc-parser.tab.c HOSTCC scripts/dtc/dtc-lexer.lex.o HOSTCC scripts/dtc/dtc-parser.tab.o HOSTLD scripts/dtc/dtc make: *** [scripts] Error 2 make: *** Waiting for unfinished jobs.... UPD include/config/kernel.release It seems that riscv64-unknown-linux-gnu-gcc does not support the option '-mstrict-align', how to deal with it then?

[aswaterman]

-mstrict-align was introduced relatively recently (early 2017, I think), so you likely need to upgrade gcc.

[palmer-dabbelt]

This should fix it. It's part of the submission (the riscv-for-submission-v3 branch).

1cd2e072bbd1a518e11b551435be0ad84a2c52af

[palmer-dabbelt]

I'm assuming this got fixed.