这些 make 消息在编译 sane-backends 时意味着什么？

Question

我尝试从源代码编译正常的后端，但在 运行 make 之后收到以下消息，以配置我 运行 ./configure --enable-avahi BACKENDS='canon genesys test'

make[1]: Leaving directory `/home/.../sane-backends/po'
Making all in testsuite
make[1]: Entering directory `/home/.../sane-backends/testsuite'
Making all in sanei
make[2]: Entering directory `/home/.../sane-backends/testsuite/sanei'
run 'make check' to run tests
make[2]: Leaving directory `/home/.../sane-backends/testsuite/sanei'
Making all in tools
make[2]: Entering directory `/home/.../sane-backends/testsuite/tools'
Use 'make check' to run the tests.
run 'make check' to run tests
make[2]: Leaving directory `/home/..../sane-backends/testsuite/tools'
make[2]: Entering directory `/home/.../sane-backends/testsuite'
make[2]: Nothing to be done for `all-am'.
make[2]: Leaving directory `/home/..../sane-backends/testsuite'
Use 'make test' to run the tests.
make[1]: Leaving directory `/home/.../sane-backends/testsuite'
make[1]: Entering directory `/home/.../sane-backends'
make[1]: Nothing to be done for `all-am'.
make[1]: Leaving directory `/home/.../sane-backends'

全职怎么了？？？

Answer 1

好的，我知道了，make说的就是它的作用，如果它没有什么可做的，它就说"nothing to do"，谢谢大家。