Get things building again

deterministic-build-wrappers/compiler-builtins-dummy/Cargo.toml

@@ -9,3 +9,4 @@ gimli = "=0.25.0"
 object = "=0.26.2"
 addr2line = "=0.16.0"
 miniz_oxide = "=0.4.4"
+unicode_width = "=0.2.1"

deterministic-build-wrappers/rustc

@@ -8,11 +8,15 @@
 args=("$@")
 IS_LIGHTNING=false
 SKIP_EMBED_BITCODE=false
+MAY_NEED_COMPILER_BUILTINS=false
+DEP_PATH=""
 for ((i=0; i<"${#args[@]}"; ++i)); do
     case ${args[i]} in
         --crate-name)
 			if [ "${args[i+1]}" = "lightning" -o "${args[i+1]}" = "lightning_types" -o "${args[i+1]}" = "lightning_background_processor" -o "${args[i+1]}" = "lightning_invoice" -o "${args[i+1]}" = "lightning_persister" -o "${args[i+1]}" = "lightning_rapid_gossip_sync" -o "${args[i+1]}" = "lightning_liquidity" -o "${args[i+1]}" = "lightning_transaction_sync" -o "${args[i+1]}" = "ldk" ]; then
 				IS_LIGHTNING=true
+			elif [ "${args[i+1]}" = "memchr" -o "${args[i+1]}" = "rustc_demangle" -o "${args[i+1]}" = "unwind" ]; then
+				MAY_NEED_COMPILER_BUILTINS=true
 			fi
 			;;
 		--crate-type)
@@ -22,6 +26,10 @@ for ((i=0; i<"${#args[@]}"; ++i)); do
 				SKIP_EMBED_BITCODE=true
 			fi
 			;;
+		--extern)
+			IFS="=" PAIR=(${args[i+1]})
+			DEP_PATH="$(dirname ${PAIR[1]})"
+			;;
     esac
 done
 for ((i=0; i<"${#args[@]}"; ++i)); do
@@ -44,4 +52,29 @@ for ((i=0; i<"${#args[@]}"; ++i)); do
 			;;
     esac
 done
-$LDK_RUSTC_PATH "${args[@]}"
+
+# For some reason, sometimes when building with build-std cargo forgets to give crates a path to
+# their `compiler_builtin` dependencies. This obviously shouldn't happen but we fix it here.
+EXTRA_ARGS=()
+if [ "$MAY_NEED_COMPILER_BUILTINS" = "true" ]; then
+	if [ -z "$DEP_PATH" ]; then
+		echo "WARNING: Need at least one other dependency to know where to look, build may to fail if cargo is buggy" > /dev/stderr
+	else
+		COUNT=0
+		CB_PATH="$(echo "$DEP_PATH"/libcompiler_builtins-*.rmeta)"
+		while [ ! -f "$CB_PATH" ]; do
+				# Wait until compiler_builtins finishes building...
+				sleep 1
+				COUNT="$(( $COUNT + 1 ))"
+				if [ "$COUNT" -gt 120 ]; then
+						echo "Took too long to get compiler_builtins built" > /dev/stderr
+						exit 1
+				fi
+				CB_PATH="$(echo "$DEP_PATH"/libcompiler_builtins-*.rmeta)"
+		done
+		sleep 1
+		EXTRA_ARGS=("--extern" compiler_builtins="$CB_PATH")
+	fi
+fi
+
+$LDK_RUSTC_PATH "${args[@]}" "${EXTRA_ARGS[@]}"

lightning-c-bindings/demo.cpp

@@ -564,7 +564,7 @@ int main() {
 	LDKThirtyTwoBytes chain_tip;
 	memset(&chain_tip, 0, sizeof(chain_tip)); // channel_open_header's prev_blockhash is all-0s
 
-	LDKNetwork network = LDKNetwork_Testnet;
+	LDKNetwork network = LDKNetwork_Testnet3;
 
 	// Trait implementations:
 	LDKBroadcasterInterface broadcast {

lightning-c-bindings/include/lightning.h

@@ -794,7 +794,11 @@ typedef enum LDKNetwork {
    /**
     * The testnet3 blockchain.
     */
-   LDKNetwork_Testnet,
+   LDKNetwork_Testnet3,
+   /**
+    * The testnet4 blockchain.
+    */
+   LDKNetwork_Testnet4,
    /**
     * A local test blockchain.
     */

lightning-c-bindings/src/bitcoin/network.rs

@@ -8,7 +8,9 @@ pub enum Network {
 	/// The main Bitcoin blockchain.
 	Bitcoin,
 	/// The testnet3 blockchain.
-	Testnet,
+	Testnet3,
+	/// The testnet4 blockchain.
+	Testnet4,
 	/// A local test blockchain.
 	Regtest,
 	/// A blockchain on which blocks are signed instead of mined.
@@ -19,15 +21,17 @@ impl Network {
 	pub(crate) fn into_bitcoin(&self) -> BitcoinNetwork {
 		match self {
 			Network::Bitcoin => BitcoinNetwork::Bitcoin,
-			Network::Testnet => BitcoinNetwork::Testnet,
+			Network::Testnet3 => BitcoinNetwork::Testnet,
+			Network::Testnet4 => BitcoinNetwork::Testnet4,
 			Network::Regtest => BitcoinNetwork::Regtest,
 			Network::Signet => BitcoinNetwork::Signet,
 		}
 	}
 	pub(crate) fn from_bitcoin(net: &BitcoinNetwork) -> Self {
 		match net {
 			BitcoinNetwork::Bitcoin => Network::Bitcoin,
-			BitcoinNetwork::Testnet => Network::Testnet,
+			BitcoinNetwork::Testnet => Network::Testnet3,
+			BitcoinNetwork::Testnet4 => Network::Testnet4,
 			BitcoinNetwork::Regtest => Network::Regtest,
 			BitcoinNetwork::Signet => Network::Signet,
 			_ => unreachable!(),