Linker and Binutils

1. GNU ld manual

   Overview of the GNU linker.

2. ld command-line options

   -o, -L, -l, --gc-sections, -rpath and related options.

3. Linker scripts

   SECTIONS, MEMORY, ENTRY and symbol assignments.

4. Linker invocation

   How ld processes input files and archives.

5. readelf

   Displaying ELF headers, sections, symbols and dynamic tags.

6. objdump

   Disassembly with -d and displaying object file contents.

7. nm

   Listing symbols and their types in object files.

8. GNU as

   GNU assembler syntax, directives and sections.

9. lld

   LLVM linker and its drop-in compatibility with GNU ld.

10. lld ELF

    Details of lld for ELF, such as --icf and linker script support.

Each section links to the official page. Titles and summaries by Extra Credit; the docs belong to their authors.