Create program/ crate avoid / crate dependency on bpfloader

The bpfloader crate was triggering cargo to perform excessive rebuilds
of in-workspace dependencies.  Unclear why exactly, but seems related to
the special dual crate-type employed by bpfloader.

Cargo.lock

@@ -1897,7 +1897,6 @@ dependencies = [
  "serde 1.0.85 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 1.0.85 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_json 1.0.38 (registry+https://github.com/rust-lang/crates.io-index)",
- "solana-bpfloader 0.12.0",
  "solana-drone 0.12.0",
  "solana-jsonrpc-core 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "solana-jsonrpc-http-server 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2205,6 +2204,18 @@ dependencies = [
  "solana-sdk 0.12.0",
 ]
 
+[[package]]
+name = "solana-programs"
+version = "0.12.0"
+dependencies = [
+ "solana 0.12.0",
+ "solana-bpfloader 0.12.0",
+ "solana-logger 0.12.0",
+ "solana-lualoader 0.12.0",
+ "solana-native-loader 0.12.0",
+ "solana-sdk 0.12.0",
+]
+
 [[package]]
 name = "solana-replicator"
 version = "0.12.0"

Cargo.toml

@@ -14,8 +14,8 @@ edition = "2018"
 codecov = { repository = "solana-labs/solana", branch = "master", service = "github" }
 
 [features]
-bpf_c = ["solana-bpfloader/bpf_c"]
-bpf_rust = ["solana-bpfloader/bpf_rust"]
+bpf_c = []
+bpf_rust = []
 chacha = []
 cuda = []
 erasure = []
@@ -45,7 +45,6 @@ rocksdb = "0.11.0"
 serde = "1.0.85"
 serde_derive = "1.0.85"
 serde_json = "1.0.38"
-solana-bpfloader = { path = "programs/native/bpf_loader", version = "0.12.0" }
 solana-drone = { path = "drone", version = "0.12.0" }
 solana-jsonrpc-core = "0.4.0"
 solana-jsonrpc-http-server = "0.4.0"
@@ -103,6 +102,7 @@ members = [
     "ledger-tool",
     "logger",
     "metrics",
+    "programs",
     "programs/native/bpf_loader",
     "programs/native/budget",
     "programs/native/erc20",

programs/Cargo.toml

@@ -0,0 +1,26 @@
+[package]
+name = "solana-programs"
+description = "Blockchain, Rebuilt for Scale"
+version = "0.12.0"
+documentation = "https://docs.rs/solana"
+homepage = "https://solana.com/"
+readme = "README.md"
+repository = "https://github.com/solana-labs/solana"
+authors = ["Solana Maintainers <maintainers@solana.com>"]
+license = "Apache-2.0"
+edition = "2018"
+
+[features]
+bpf_c = ["solana-bpfloader/bpf_c"]
+bpf_rust = ["solana-bpfloader/bpf_rust"]
+chacha = ["solana/chacha"]
+cuda = ["solana/cuda"]
+erasure = ["solana/erasure"]
+
+[dependencies]
+solana = { path = "..", version = "0.12.0" }
+solana-bpfloader = { path = "native/bpf_loader", version = "0.12.0" }
+solana-logger = { path = "../logger", version = "0.12.0" }
+solana-lualoader = { path = "native/lua_loader", version = "0.12.0" }
+solana-native-loader = { path = "native/native_loader", version = "0.12.0" }
+solana-sdk = { path = "../sdk", version = "0.12.0" }