`configure --target=arm-unknown-linux-gnueabihf,arm-unknown-linux-gnueabi` ignores the arm-unknown-linux-gnueabi target

[japaric]

STR

# This ignores the arm-unknown-linux-gnueabi target
$ git clone --depth 1 https://github.com/rust-lang/rust
$ rust/configure --target=arm-unknown-linux-gnueabihf,arm-unknown-linux-gnueabi
$ cat config.mk | grep CFG_TARGET
CFG_TARGET           := x86_64-unknown-linux-gnu arm-unknown-linux-gnueabihf

# But this (swapped targets) accepts both targets
$ rust/configure --target=arm-unknown-linux-gnueabi,arm-unknown-linux-gnueabihf
$ cat config.mk | grep CFG_TARGET
CFG_TARGET           := x86_64-unknown-linux-gnu arm-unknown-linux-gnueabi arm-unknown-linux-gnueabihf

Meta

$ cd rust && git rev-parse HEAD
6d6ae1ffe665610ae235dd95e849248a6741ff0f

cc @alexcrichton

[alexcrichton]

Weird... we probably have some crazy logic in the configure script which doesn't account for prefixes or something like that.

[Mark-Simulacrum]

Seems that this is still an issue. However, I don't know whether this actually causes problems with rustbuild. Perhaps @alexcrichton could comment?

With --target=arm-unknown-linux-gnueabihf,arm-unknown-linux-gnueabi
CFG_TARGET           := arm-unknown-linux-gnueabihf
With --target=arm-unknown-linux-gnueabi,arm-unknown-linux-gnueabihf
CFG_TARGET           := arm-unknown-linux-gnueabi arm-unknown-linux-gnueabihf

[alexcrichton]

Unfortunately not much more than before, probably still the same crazy ./configure logic