Can't specify linker arguments with space in them

[jethrogb]

Executing rustc -C link-args=... results in the ... being split by whitespace and each element being supplied as a single argument to the linker. This means it's not possible to specify a linker argument with whitespace in it (for example, a path to a linker script) on the command line. The same applies to the #[link_args] attribute. Possible solutions are parsing some kind of escaping (fragile) and allowing setting multiple link-arg arguments, each of which individually is not whitespace-split.

[sanxiyn]

See rust-lang/rfcs#1509 for a discussion and a design.

[japaric]

allowing setting multiple link-arg arguments

#36574 implements this

[sanxiyn]

Fixed by #36574.