我是这个网站的新手，这是我第一次使用RISC-V处理器。我正在学习PULP SDK生成过程“ https://github.com/pulp-platform/pulp-sdk”的教程。但是，当我录制命令“ $ make all”时，我在SDK构建阶段受阻，我不明白这些错误是什么意思。
以下错误：
sdk:json-tools:build: make all install
make[1]: Entering directory '/home/pulp/project/pulpissimo/pulp-sdk/json-tools'
#### Building in /home/pulp/project/pulpissimo/pulp-sdk/build/sdk/json-tools
#### Release type is RelWithDebInfo
#### Installing to /home/pulp/project/pulpissimo/pulp-sdk/pkg/sdk/dev/install/ws
( cd /home/pulp/project/pulpissimo/pulp-sdk/build/sdk/json-tools ; make all VERBOSE=0 )
make[2]: Entering directory '/home/pulp/project/pulpissimo/pulp-sdk/build/sdk/json-tools'
make[2]: *** No rule to make target 'all'. Stop.
make[2]: Leaving directory '/home/pulp/project/pulpissimo/pulp-sdk/build/sdk/json-tools'
Makefile:46: recipe for target 'all' failed
make[1]: *** [all] Error 2
make[1]: Leaving directory '/home/pulp/project/pulpissimo/pulp-sdk/json-tools'
Reached EOF with exit status 2
FATAL ERROR: the command 'build' has failed
Makefile:6: recipe for target 'all' failed
make: *** [all] Error 255
先谢谢您
运行in the documentation之前是否已根据建议的make all选择了目标？
例如通过运行source configs/pulpissimo.sh。