Considering better configuration method

[lkaybob]

While rust-dpdk could automatically clone DPDK's source, and build it, we need to consider those who have downloaded DPDK's source on their own.

Considerations

• Why RUSTFLSAGS is needed
  • Currently, it's specified in README.md, but it does not catch reader's attention. We could separate the content under Caveats header.
  • We could also enhance "first-time-build-error", by attaching the link to the header. (In order to have users understands why this is needed.)
• Does environment variable is really needed?
  • Using RTE_SDK and RTE_TARGET while build could be fragile, and it could be a barrier to those who are not familiar with DPDK.
  • Therefore, we need to seek better solution than being dependent on environment variable.

References

capsule-rs uses meson/ninja system (But it could be heavyweight solution for us.)

[leeopop]

Resolved