How do I write a musl dependency in menuconfig?

For Developers
1

Hi.

  1. How do I write a package dependency on musl in menuconfig?
    I found USE_MUSL and LIBC_USE_MUSL symbols. Which one should I use?

  2. I saw various obscure symbols like SMALL_FLASH being used in package dependencies. Is there a list of these and their meaning anywhere?

Thanks.

2

What is your actual need? Do you really depend on something that is in musl but not in glibc?

SMALL_FLASH is used for devices with really small flash size, so that even more restricted feature suet is included. Similarly there is small ram, if I remember right.
The is no real list of those.
Best explanations are probably in the commit messages introducing those, although some date from pre-git times without commit messages.

In general, the target features are listed in

3

The opposite. There is something that musl doesn't have, so disable with depends on !MUSL, or whatever the musl symbol is.

4

So that "something" should be wrapped in glibc macros. They even make manuals for avid readers.