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programs_libraries.md 1.67 KiB

Programs and Libraries

Redox can run programs. Some programs are interpreted by a runtime for the program's language, such as a script running in the Ion shell or a Python program. Others are compiled into machine instructions that run on a particular operating system (Redox) and specific hardware (e.g. x86 compatible CPU in 64-bit mode).

  • In Redox compiled binaries use the standard ELF ("Executable and Linkable Format") format.

Programs could directly invoke Redox syscalls, but most call library functions that are higher-level and more comfortable to use. You link your program with the libraries it needs.

  • Redox does not support dynamic-link libraries yet (issue #927), so the libraries that a program uses are statically linked into its compiled binary.
  • Most C and C++ programs call functions in a C standard library ("libc") such as fopen
    • Redox includes a port of the newlib Standard C library. This is how programs such as git can run on Redox. newlib has some POSIX compatibility.
  • Rust programs implicitly or explicitly call functions in the Rust standard library (libstd).
    • ?? Redox implements a subset of this in libredox
    • The Rust libstd now includes an implementation of its system-dependent parts (such as file access and setting environment variables) for Redox, in src/libstd/sys/redox. ?? Most of libstd works in Redox, so many command-line Rust programs can be compiled for Redox.

The Redox "cookbook" project includes recipes for compiling C and Rust projects into Redox binaries.