Add solana-crate-features workaround to avoid cargo feature thrashing (#5904)

automerge

crate-features/0001-Print-package-features.patch

@@ -0,0 +1,44 @@
+From 64514728f549719b8b42af1570404d5f51730e8c Mon Sep 17 00:00:00 2001
+From: Michael Vines <mvines@gmail.com>
+Date: Fri, 13 Sep 2019 17:34:43 -0700
+Subject: [PATCH] Print package features
+
+---
+ src/cargo/core/compiler/context/compilation_files.rs | 8 ++++++++
+ src/cargo/core/compiler/fingerprint.rs               | 2 +-
+ 2 files changed, 9 insertions(+), 1 deletion(-)
+
+diff --git a/src/cargo/core/compiler/context/compilation_files.rs b/src/cargo/core/compiler/context/compilation_files.rs
+index ed3232ea..c98da4ca 100644
+--- a/src/cargo/core/compiler/context/compilation_files.rs
++++ b/src/cargo/core/compiler/context/compilation_files.rs
+@@ -591,5 +591,13 @@ fn compute_metadata<'a, 'cfg>(
+     if let Ok(ref channel) = __cargo_default_lib_metadata {
+         channel.hash(&mut hasher);
+     }
++
++    eprintln!(
++        "package {}: {} #{} features={:?}",
++        unit.pkg.package_id(),
++        unit.target,
++        hasher.finish(),
++        bcx.resolve.features_sorted(unit.pkg.package_id()),
++    );
+     Some(Metadata(hasher.finish()))
+ }
+diff --git a/src/cargo/core/compiler/fingerprint.rs b/src/cargo/core/compiler/fingerprint.rs
+index 3738bcdd..de78ffb4 100644
+--- a/src/cargo/core/compiler/fingerprint.rs
++++ b/src/cargo/core/compiler/fingerprint.rs
+@@ -830,7 +830,7 @@ impl Fingerprint {
+             // for a discussion of why it's `>` see the discussion about #5918
+             // below in `find_stale`.
+             if dep_mtime > max_mtime {
+-                log::info!("dependency on `{}` is newer than we are", dep.name);
++                eprintln!("dependency on `{}` is newer than we are", dep.name);
+                 return Ok(());
+             }
+         }
+-- 
+2.20.1 (Apple Git-117)
+