add on gpu compile flag support

Cargo.toml

@@ -6,7 +6,6 @@ members = [
 ]
 resolver = "2"
 
-
 [profile.release]
 opt-level = 3
 

config.toml

@@ -0,0 +1,10 @@
+[patch.'https://github.com/zkMIPS/plonky2']
+#plonky2 = {             path = "../plonky2-gpu/plonky2" }
+#plonky2_util = {        path = "../plonky2-gpu/util" }
+#plonky2_field = {       path = "../plonky2-gpu/field" }
+#plonky2_maybe_rayon = { path = "../plonky2-gpu/maybe_rayon" }
+plonky2 = { git = "https://github.com/zkMIPS/plonky2-gpu.git" }
+plonky2_util = { git = "https://github.com/zkMIPS/plonky2-gpu.git" }
+plonky2_field = { git = "https://github.com/zkMIPS/plonky2-gpu.git" }
+plonky2_maybe_rayon = { git = "https://github.com/zkMIPS/plonky2-gpu.git" }
+

prover/Cargo.toml

@@ -16,6 +16,7 @@ bincode = "1.3.3"
 
 plonky2 = { git = "https://github.com/zkMIPS/plonky2.git", branch = "zkm_dev" }
 #starky = { git = "https://github.com/zkMIPS/plonky2.git", branch = "zkm_dev" }
+plonky2_field = { git = "https://github.com/zkMIPS/plonky2.git", branch = "zkm_dev" }
 plonky2_util = { git = "https://github.com/zkMIPS/plonky2.git", branch = "zkm_dev" }
 plonky2_maybe_rayon = { git = "https://github.com/zkMIPS/plonky2.git", branch = "zkm_dev" }
 
@@ -39,6 +40,8 @@ lazy_static = "1.4.0"
 elf = { version = "0.7", default-features = false }
 sha2 = { version = "0.10.8", default-features = false }
 
+rustacuda = { version = "0.1.3", optional = true }
+rustacuda_core = { version = "0.1.2", optional = true }
 
 [dev-dependencies]
 env_logger = "0.10.0"
@@ -49,6 +52,7 @@ plonky2x-derive = { git = "https://github.com/zkMIPS/succinctx.git", package = "
 
 [features]
 test = []
+gpu = ["rustacuda", "rustacuda_core"]
 
 [profile.release]
 debug = true