auto merge of #12791 : alexcrichton/rust/liblog, r=brson

The rationale and modifications can be found in the first commit message.

This does make logging a bit more painful to use initially because it involves a feature gate and some `phase` attributes, but I think it may be reasonable to not require the `phase` attribute for loading `macro_rules!` macros because defining them will still be gated.

Author: bors

mk/crates.mk

@@ -51,7 +51,7 @@
 
 TARGET_CRATES := std green rustuv native flate arena glob term semver \
                  uuid serialize sync getopts collections num test time rand \
-		 workcache url
+		 workcache url log
 HOST_CRATES := syntax rustc rustdoc fourcc hexfloat
 CRATES := $(TARGET_CRATES) $(HOST_CRATES)
 TOOLS := compiletest rustdoc rustc
@@ -60,15 +60,15 @@ DEPS_std := native:rustrt native:compiler-rt native:backtrace
 DEPS_green := std rand native:context_switch
 DEPS_rustuv := std native:uv native:uv_support
 DEPS_native := std
-DEPS_syntax := std term serialize collections
+DEPS_syntax := std term serialize collections log
 DEPS_rustc := syntax native:rustllvm flate arena serialize sync getopts \
-              collections time
+              collections time log
 DEPS_rustdoc := rustc native:sundown serialize sync getopts collections \
                 test time
 DEPS_flate := std native:miniz
 DEPS_arena := std collections
 DEPS_glob := std
-DEPS_serialize := std collections
+DEPS_serialize := std collections log
 DEPS_term := std collections
 DEPS_semver := std
 DEPS_uuid := std serialize rand
@@ -82,7 +82,8 @@ DEPS_test := std collections getopts serialize term time
 DEPS_time := std serialize
 DEPS_rand := std
 DEPS_url := std collections
-DEPS_workcache := std serialize collections std
+DEPS_workcache := std serialize collections log
+DEPS_log := std sync
 
 TOOL_DEPS_compiletest := test green rustuv getopts
 TOOL_DEPS_rustdoc := rustdoc native

src/compiletest/compiletest.rs

@@ -9,13 +9,16 @@
 // except according to those terms.
 
 #[crate_type = "bin"];
+#[feature(phase)];
 
 #[allow(non_camel_case_types)];
 #[deny(warnings)];
 #[allow(deprecated_owned_vector)];
 
 extern crate test;
 extern crate getopts;
+#[phase(link, syntax)]
+extern crate log;
 
 use std::os;
 use std::io;