Workaround issues with crate loading during cross-compilation

Author: petrochenkov

src/test/ui/proc-macro/dollar-crate.rs

@@ -1,15 +1,19 @@
 // edition:2018
-// compile-flags:--extern dollar_crate --extern dollar_crate_external
 // aux-build:dollar-crate.rs
 // aux-build:dollar-crate-external.rs
 
 // Anonymize unstable non-dummy spans while still showing dummy spans `0..0`.
 // normalize-stdout-test "bytes\([^0]\w*\.\.(\w+)\)" -> "bytes(LO..$1)"
 // normalize-stdout-test "bytes\((\w+)\.\.[^0]\w*\)" -> "bytes($1..HI)"
 
+extern crate dollar_crate;
+extern crate dollar_crate_external;
+
 type S = u8;
 
 mod local {
+    use crate::dollar_crate;
+
     macro_rules! local {
         () => {
             dollar_crate::m! {
@@ -28,6 +32,8 @@ mod local {
 }
 
 mod external {
+    use crate::dollar_crate_external;
+
     dollar_crate_external::external!(); //~ ERROR the name `D` is defined multiple times
 }
 

src/test/ui/proc-macro/dollar-crate.stderr

@@ -1,5 +1,5 @@
 error[E0428]: the name `D` is defined multiple times
-  --> $DIR/dollar-crate.rs:23:13
+  --> $DIR/dollar-crate.rs:27:13
    |
 LL |             struct D($crate::S); //~ ERROR the name `D` is defined multiple times
    |             ^^^^^^^^^^^^^^^^^^^^
@@ -13,7 +13,7 @@ LL |     local!();
    = note: `D` must be defined only once in the type namespace of this module
 
 error[E0428]: the name `D` is defined multiple times
-  --> $DIR/dollar-crate.rs:31:5
+  --> $DIR/dollar-crate.rs:37:5
    |
 LL |     dollar_crate_external::external!(); //~ ERROR the name `D` is defined multiple times
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^