Linux builds can be done directly with make or through the distro scripts in build_scripts/. Direct builds are best while developing a compiler or runtime change. Distro scripts are best when producing installable packages or checking that a target still works from a clean system image.
make print-config
make prereqs-fbc
make -j4The prereqs-fbc target checks for the compiler and tools needed by the build that the make system has selected.
The tree contains scripts for Debian, Ubuntu, Raspbian, Alpine, Arch, RPM-based distros, Slackware, and related test images. Use the matching script for the package family being tested. The scripts also document the package names needed by that distro family.
For Linux-to-other-target work, start with Cross-compiling and the target-specific build page. The package scripts generally know more about install layout, naming, and archive contents than a short manual command line does.