Do I understand correctly this rule for Linux x86-64:

1) Either I can use this:





2) Or this:




That is:
a. "extrn" can't be used with "format elf64 executable 3"

b. for "format elf64 executable 3" only "segment" can be used, not "section"



If so, why is that?

LOL

"elf64 executable 3" dynamic setup (import, segment etc) is to generate executable file directly. No intermediary .o file. Commonly used in these steps:

(compile) ----------------------------> RUN


"elf64" static setup (extrn, section etc) is to generate object files to be linked with anything later on. Produce .o file. Commonly used in these 3-step like:

(compile) --------> linking (gcc, ld, golink, link, alink) ---------> RUN

In general, you cannot use dynamic setup to create a static source and vice versa. You're not paying attention to your own previous threads.

SOL

There're 2 yes-no questions. You're not paying attention.

ROL

@jorido

You better just stick to your HTML 5.0 For Dummy book. Easier read.
FASM dynamic linking is just too much for some people.

Have you read it? Would you recommend?

a. You can't link to an external symbol with extrn if you are not linking (format executable).

b. See your previous thread about section and segments.