How to use printf function?

[Guochen-Shine]

With the -nostdlib option used, the following error occurs nostdlib is disabled and more errors are made

[ICer@IC_EDA /home/ICer/guochen/briey_fpu/briey_software/briey/uart]$make /opt/riscv64-fpu/bin/riscv64-unknown-elf-gcc -march=rv32imf -mabi=ilp32f -o build/uart.elf build/src/main.o build/src/crt.o -march=rv32imf -mabi=ilp32f -lgcc -mcmodel=medany -nostartfiles -ffreestanding -Wl,-Bstatic,-T,../libs/linker.ld,-Map,build/uart.map,--print-memory-usage /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-puts.o): ABI is incompatible with that of the selected emulation: target emulation elf64-littleriscv' does not matchelf32-littleriscv' /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: failed to merge target specific data of file /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-puts.o) /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-strlen.o): ABI is incompatible with that of the selected emulation: target emulation elf64-littleriscv' does not matchelf32-littleriscv' /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: failed to merge target specific data of file /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-strlen.o) /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-findfp.o): ABI is incompatible with that of the selected emulation: target emulation elf64-littleriscv' does not matchelf32-littleriscv' /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: failed to merge target specific data of file /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-findfp.o) /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-fvwrite.o): ABI is incompatible with that of the selected emulation: target emulation elf64-littleriscv' does not matchelf32-littleriscv' /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: failed to merge target specific data of file /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-fvwrite.o) /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-fwalk.o): ABI is incompatible with that of the selected emulation: target emulation elf64-littleriscv' does not matchelf32-littleriscv' /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: failed to merge target specific data of file /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-fwalk.o) /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-impure.o): ABI is incompatible with that of the selected emulation: target emulation elf64-littleriscv' does not matchelf32-littleriscv' /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: failed to merge target specific data of file /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-impure.o) /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-mallocr.o): ABI is incompatible with that of the selected emulation: target emulation elf64-littleriscv' does not matchelf32-littleriscv' /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: failed to merge target specific data of file /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-mallocr.o) /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-memchr.o): ABI is incompatible with that of the selected emulation: target emulation elf64-littleriscv' does not matchelf32-littleriscv' /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: failed to merge target specific data of file /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-memchr.o) /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-memcpy.o): ABI is incompatible with that of the selected emulation: target emulation elf64-littleriscv' does not matchelf32-littleriscv' /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: failed to merge target specific data of file /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-memcpy.o) /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-memmove.o): ABI is incompatible with that of the selected emulation: target emulation elf64-littleriscv' does not matchelf32-littleriscv' /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: failed to merge target specific data of file /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-memmove.o) /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-memset.o): ABI is incompatible with that of the selected emulation: target emulation elf64-littleriscv' does not matchelf32-littleriscv' /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: failed to merge target specific data of file /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-memset.o) /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-mlock.o): ABI is incompatible with that of the selected emulation: target emulation elf64-littleriscv' does not matchelf32-littleriscv' /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: failed to merge target specific data of file /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-mlock.o) /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-reallocr.o): ABI is incompatible with that of the selected emulation: target emulation elf64-littleriscv' does not matchelf32-littleriscv' /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: failed to merge target specific data of file /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-reallocr.o) /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-sbrkr.o): ABI is incompatible with that of the selected emulation: target emulation elf64-littleriscv' does not matchelf32-littleriscv' /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: failed to merge target specific data of file /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-sbrkr.o) /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-stdio.o): ABI is incompatible with that of the selected emulation: target emulation elf64-littleriscv' does not matchelf32-littleriscv' /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: failed to merge target specific data of file /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-stdio.o) /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-writer.o): ABI is incompatible with that of the selected emulation: target emulation elf64-littleriscv' does not matchelf32-littleriscv' /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: failed to merge target specific data of file /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-writer.o) /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-wsetup.o): ABI is incompatible with that of the selected emulation: target emulation elf64-littleriscv' does not matchelf32-littleriscv' /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: failed to merge target specific data of file /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-wsetup.o) /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-closer.o): ABI is incompatible with that of the selected emulation: target emulation elf64-littleriscv' does not matchelf32-littleriscv' /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: failed to merge target specific data of file /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-closer.o) /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-fclose.o): ABI is incompatible with that of the selected emulation: target emulation elf64-littleriscv' does not matchelf32-littleriscv' /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: failed to merge target specific data of file /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-fclose.o) /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-fflush.o): ABI is incompatible with that of the selected emulation: target emulation elf64-littleriscv' does not matchelf32-littleriscv' /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: failed to merge target specific data of file /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-fflush.o) /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-freer.o): ABI is incompatible with that of the selected emulation: target emulation elf64-littleriscv' does not matchelf32-littleriscv' /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: failed to merge target specific data of file /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-freer.o) /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-lseekr.o): ABI is incompatible with that of the selected emulation: target emulation elf64-littleriscv' does not matchelf32-littleriscv' /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: failed to merge target specific data of file /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-lseekr.o) /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-makebuf.o): ABI is incompatible with that of the selected emulation: target emulation elf64-littleriscv' does not matchelf32-littleriscv' /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: failed to merge target specific data of file /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-makebuf.o) /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-readr.o): ABI is incompatible with that of the selected emulation: target emulation elf64-littleriscv' does not matchelf32-littleriscv' /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: failed to merge target specific data of file /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-readr.o) /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-reent.o): ABI is incompatible with that of the selected emulation: target emulation elf64-littleriscv' does not matchelf32-littleriscv' /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: failed to merge target specific data of file /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-reent.o) /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-fstatr.o): ABI is incompatible with that of the selected emulation: target emulation elf64-littleriscv' does not matchelf32-littleriscv' /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: failed to merge target specific data of file /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-fstatr.o) /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-isattyr.o): ABI is incompatible with that of the selected emulation: target emulation elf64-littleriscv' does not matchelf32-littleriscv' /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: failed to merge target specific data of file /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-isattyr.o) /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libgloss.a(sys_close.o): ABI is incompatible with that of the selected emulation: target emulation elf64-littleriscv' does not matchelf32-littleriscv' /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: failed to merge target specific data of file /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libgloss.a(sys_close.o) /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libgloss.a(sys_fstat.o): ABI is incompatible with that of the selected emulation: target emulation elf64-littleriscv' does not matchelf32-littleriscv' /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: failed to merge target specific data of file /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libgloss.a(sys_fstat.o) /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libgloss.a(sys_isatty.o): ABI is incompatible with that of the selected emulation: target emulation elf64-littleriscv' does not matchelf32-littleriscv' /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: failed to merge target specific data of file /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libgloss.a(sys_isatty.o) /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libgloss.a(sys_lseek.o): ABI is incompatible with that of the selected emulation: target emulation elf64-littleriscv' does not matchelf32-littleriscv' /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: failed to merge target specific data of file /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libgloss.a(sys_lseek.o) /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libgloss.a(sys_read.o): ABI is incompatible with that of the selected emulation: target emulation elf64-littleriscv' does not matchelf32-littleriscv' /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: failed to merge target specific data of file /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libgloss.a(sys_read.o) /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libgloss.a(sys_sbrk.o): ABI is incompatible with that of the selected emulation: target emulation elf64-littleriscv' does not matchelf32-littleriscv' /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: failed to merge target specific data of file /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libgloss.a(sys_sbrk.o) /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libgloss.a(sys_write.o): ABI is incompatible with that of the selected emulation: target emulation elf64-littleriscv' does not matchelf32-littleriscv' /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: failed to merge target specific data of file /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libgloss.a(sys_write.o) /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libgloss.a(sys_conv_stat.o): ABI is incompatible with that of the selected emulation: target emulation elf64-littleriscv' does not matchelf32-littleriscv' /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: failed to merge target specific data of file /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libgloss.a(sys_conv_stat.o) /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-errno.o): ABI is incompatible with that of the selected emulation: target emulation elf64-littleriscv' does not matchelf32-littleriscv' /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: failed to merge target specific data of file /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-errno.o) /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: build/uart.elf(.text): relocation ".L0 +0x0 (type R_RISCV_PCREL_LO12_I)" goes out of range /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/lib/libc.a(lib_a-puts.o): file class ELFCLASS64 incompatible with ELFCLASS32 /opt/riscv64-fpu/bin/../lib/gcc/riscv64-unknown-elf/7.2.0/../../../../riscv64-unknown-elf/bin/ld: final link failed: 文件格式错误 collect2: error: ld returned 1 exit status make: *** [../../resources/subproject.mk:46：build/uart.elf] 错误 1

[Dolu1990]

Hi,

Can you compile https://github.com/SpinalHDL/VexRiscvSocSoftware/tree/master/projects/briey ? Or this fail aswell ?

[Guochen-Shine]

Hi， I can compile https://github.com/SpinalHDL/VexRiscvSocSoftware/tree/master/projects/briey. This problem arises when I use the "printf" function.

[Guochen-Shine]

I'm sorry, I deleted something earlier, I'll try it.

[Guochen-Shine]

I want to use printf("a = %f\n",3.14); to print floating-point data. But I encountered the following problems: I added the following code to stdlib.c stdlib.c:(.text+0x6b0): undefined reference to `__truncdfsf2' I think there is a soft floating point library missing double to float, what should I do?

[Dolu1990]

Hi, Try with rv32imaf instead ? that one may be included in your toolchain. Else you need to compile gcc yourself with specificaly rv32imf option.

[Guochen-Shine]

Hi，thank you for your answer.I tried it like you said.But Error still exists.

[Dolu1990]

i don't know then, that's compiler hell, probably the best would be to fine a better makefile than the one i had.

[Guochen-Shine]

Thank you very much, I am trying to build my own gcc.

[Guochen-Shine]

I tried to generate the new riscv32-unknown-elf-gcc. https://github.com/riscv-collab/riscv-gnu-toolchain ../configure --prefix=/opt/riscv32 --with-arch=rv32imf --with-abi=ilp32f I use the VexriscSoftWare default makeflie, modify the gcc path, to achieve the purpose. Thank you for your suggestion.

[Dolu1990]

Ahhh nice ^^