ocamlfind:tldr:fc9c7

This command is written in the Unix shell syntax and consists of several components:

1. ocamlfind: It is a tool used to locate and manage OCaml libraries. It allows you to specify which version of a library to use and manages the search paths for these libraries.

2. -toolchain ${cross-toolchain}: This is an option for the ocamlfind command. ${cross-toolchain} represents a placeholder for the name of a specific toolchain. The toolchain is a set of tools (compiler, linker, etc.) necessary for cross-compiling, which means compiling code for a different target platform or architecture.

3. ocamlopt: It is the OCaml native code compiler. This compiler generates highly optimized machine code that can be executed directly on the target machine without requiring an interpreter.

4. -o ${path-to-executable}: This is an option for the ocamlopt command. ${path-to-executable} represents the path and filename for the executable (output binary) that will be generated by the compiler.

5. ${path-to-source-ml}: This represents the path and filename of the OCaml source file (.ml) that will be compiled. The ocamlopt command will read this file and generate corresponding compiled object code.

In summary, this command locates the appropriate cross-compiling toolchain using ocamlfind, then uses ocamlopt to compile an OCaml source file into a native executable, with the output binary being placed at the specified path.