Description:

When building aarch64-linux-gnu-gcc, configure is passed --with-as=<aarch64-linux-gnu-as path>, and --with-ld=... as well.

Not only is this unnecessary, it is actually harmful. When GCC is configured with --with-as/ld, there is absolutely no way to override what as or ld it uses, i.e. -Bprefix is ignored for the purpose of as/ld selection.

Note that arm-none-eabi-gcc (also in community) does not use either --with-as or --with-ld, and therefore allows as/ld to be overridden, same applies to arm-linux-gnueabihf-gcc in the AUR.


Steps to reproduce:

$ cd /tmp
$ mkdir tmp
$ touch tmp/as && chmod +x tmp/as
$ echo 'int main() {}' > dummy.c
$ aarch64-linux-gnu-gcc -Btmp -o dummy dummy.c
$ arm-none-eabi-gcc -Btmp -o dummy dummy.c
arm-none-eabi-gcc: error trying to exec 'tmp/as': execv: Exec format error

In other words: aarch64-linux-gnu-gcc is using /usr/aarch64-linux-gnu/bin/as no matter what, whereas arm-none-eabi-gcc honours -Btmp and uses tmp/as (which fails as expected, since it's an empty file).