/bin/sh ./libtool  --tag=CC   --mode=compile /usr/bin/gcc -DHAVE_CONFIG_H -I. -I..  -I. -I../include -Iinclude -I../src -I/home/oct1158/Documents/Code/C/luckfox-pico/sysdrv/source/buildroot/buildroot-2023.02.6/output/host/include  -Wall -O2 -I/home/oct1158/Documents/Code/C/luckfox-pico/sysdrv/source/buildroot/buildroot-2023.02.6/output/host/include -fexceptions -c -o src/tramp.lo ../src/tramp.c
libtool: compile:  /usr/bin/gcc -DHAVE_CONFIG_H -I. -I.. -I. -I../include -Iinclude -I../src -I/home/oct1158/Documents/Code/C/luckfox-pico/sysdrv/source/buildroot/buildroot-2023.02.6/output/host/include -Wall -O2 -I/home/oct1158/Documents/Code/C/luckfox-pico/sysdrv/source/buildroot/buildroot-2023.02.6/output/host/include -fexceptions -c ../src/tramp.c  -fPIC -DPIC -o src/.libs/tramp.o
../src/tramp.c: In function 'ffi_tramp_get_temp_file':
../src/tramp.c:262:22: error: implicit declaration of function 'open_temp_exec_file' [-Wimplicit-function-declaration]
  262 |   tramp_globals.fd = open_temp_exec_file ();
      |                      ^~~~~~~~~~~~~~~~~~~
make[5]: *** [Makefile:1323: src/tramp.lo] Error 1
make[5]: Leaving directory '/home/oct1158/Documents/Code/C/luckfox-pico/sysdrv/source/buildroot/buildroot-2023.02.6/output/build/host-libffi-3.4.4/x86_64-pc-linux-gnu'
make[4]: *** [Makefile:1395: all-recursive] Error 1
make[4]: Leaving directory '/home/oct1158/Documents/Code/C/luckfox-pico/sysdrv/source/buildroot/buildroot-2023.02.6/output/build/host-libffi-3.4.4/x86_64-pc-linux-gnu'
make[3]: *** [Makefile:623: all] Error 2
make[3]: Leaving directory '/home/oct1158/Documents/Code/C/luckfox-pico/sysdrv/source/buildroot/buildroot-2023.02.6/output/build/host-libffi-3.4.4/x86_64-pc-linux-gnu'
make[2]: *** [Makefile:591: all-all] Error 2
make[2]: Leaving directory '/home/oct1158/Documents/Code/C/luckfox-pico/sysdrv/source/buildroot/buildroot-2023.02.6/output/build/host-libffi-3.4.4'
make[1]: *** [package/pkg-generic.mk:293: /home/oct1158/Documents/Code/C/luckfox-pico/sysdrv/source/buildroot/buildroot-2023.02.6/output/build/host-libffi-3.4.4/.stamp_built] Error 2
make[1]: Leaving directory '/home/oct1158/Documents/Code/C/luckfox-pico/sysdrv/source/buildroot/buildroot-2023.02.6'
make: *** [Makefile:618: buildroot] Error 2
make: Leaving directory '/home/oct1158/Documents/Code/C/luckfox-pico/sysdrv'
[build.sh:error] Running build_rootfs failed!
[build.sh:error] exit code 2 from line 852:
[build.sh:info]     make rootfs -C ${SDK_SYSDRV_DIR}
[oct1158@fed41-bh8f7e0 luckfox-pico]$

解决办法：

修改sysdrv/source/buildroot/buildroot-2023.02.6/output/build/host-libffi-3.4.4/src/tramp.c文件。
在顶部添加一行：
int open_temp_exec_file(void);