Compilation fails because of missing esp32 linker(gcc) when esp8266 target selected

[pacmancoder]

Hi @MabezDev

I found the following issue:
Compilation fails with error for xtensa-esp8266-none-elf target because of missing xtensa-esp32-elf-gcc executable.

Expected result:
Rust uses xtensa-lx106-elf-gcc from official toolchain as linker parameter

Actual result:
Rust tries to find xtensa-esp32-elf-gcc and fails

Temporary solution:
Manually set correct linker by adding "-C linker=" to the RUSTFLAGS variable

[MabezDev]

Good catch. Espressif are in the process of porting to llvm8 so I will refrain from updating for now.