proc_macro: move to a dependency of libtest.

Author: eddyb

src/Cargo.lock

@@ -14,9 +14,7 @@ bitflags = "1.0"
 fmt_macros = { path = "../libfmt_macros" }
 graphviz = { path = "../libgraphviz" }
 jobserver = "0.1"
-lazy_static = "1.0.0"
 log = { version = "0.4", features = ["release_max_level_info", "std"] }
-proc_macro = { path = "../libproc_macro" }
 rustc_apfloat = { path = "../librustc_apfloat" }
 rustc_back = { path = "../librustc_back" }
 rustc_const_math = { path = "../librustc_const_math" }

src/librustc/Cargo.toml

@@ -11,7 +11,6 @@ crate-type = ["dylib"]
 [dependencies]
 flate2 = "1.0"
 log = "0.4"
-proc_macro = { path = "../libproc_macro" }
 rustc = { path = "../librustc" }
 rustc_back = { path = "../librustc_back" }
 rustc_data_structures = { path = "../librustc_data_structures" }

src/librustc_metadata/Cargo.toml

@@ -10,8 +10,7 @@ crate-type = ["dylib"]
 
 [dependencies]
 fmt_macros = { path = "../libfmt_macros" }
-proc_macro = { path = "../libproc_macro" }
 rustc_errors = { path = "../librustc_errors" }
 syntax = { path = "../libsyntax" }
 syntax_pos = { path = "../libsyntax_pos" }
-rustc_data_structures = { path = "../librustc_data_structures" }
+rustc_data_structures = { path = "../librustc_data_structures" }

src/libsyntax_ext/Cargo.toml

@@ -11,3 +11,6 @@ crate-type = ["dylib", "rlib"]
 [dependencies]
 getopts = "0.2"
 term = { path = "../libterm" }
+
+# not actually used but needed to always have proc_macro in the sysroot
+proc_macro = { path = "../libproc_macro" }