X-Git-Url: http://git.bitcoin.ninja/index.cgi?p=ldk-c-bindings;a=blobdiff_plain;f=genbindings.sh;h=17522868857589700921f4d4a49fecae31b58a05;hp=e0ff6b3f060af4259a92c2545f6ced32d1a6b4d9;hb=b2819774e287d465e23415cbfdaa397e2e0a2749;hpb=5eebd45b471833805e81ad4c23ec93d7711e0a23

diff --git a/genbindings.sh b/genbindings.sh
index e0ff6b3..1752286 100755
--- a/genbindings.sh
+++ b/genbindings.sh
@@ -9,14 +9,65 @@ if [ ! -d "$1/lightning" -o "$2" != "true" -a "$2" != "false" ]; then
 	exit 1
 fi
 
+export LC_ALL=C
+
 # On reasonable systems, we can use realpath here, but OSX is a diva with 20-year-old software.
 ORIG_PWD="$(pwd)"
 cd "$1"
 LIGHTNING_PATH="$(pwd)"
+LIGHTNING_GIT="$(git describe --tag --dirty --abbrev=16)"
 cd "$ORIG_PWD"
 
 # Generate (and reasonably test) C bindings
 
+# First we set various compiler flags...
+HOST_PLATFORM="$(rustc --version --verbose | grep "host:")"
+
+# Set path to include our rustc wrapper as well as cbindgen
+export LDK_RUSTC_PATH="$(which rustc)"
+export RUSTC="$(pwd)/deterministic-build-wrappers/rustc"
+PATH="$PATH:~/.cargo/bin"
+
+# Set up CFLAGS and RUSTFLAGS vars appropriately for building libsecp256k1 and demo apps...
+BASE_CFLAGS="" # CFLAGS for libsecp256k1
+LOCAL_CFLAGS="" # CFLAGS for demo apps
+
+# Remap paths so that our builds are deterministic
+BASE_RUSTFLAGS="--cfg=c_bindings --remap-path-prefix $LIGHTNING_PATH=rust-lightning --remap-path-prefix $(pwd)=ldk-c-bindings --remap-path-prefix $HOME/.cargo="
+
+# If the C compiler supports it, also set -ffile-prefix-map
+echo "int main() {}" > genbindings_path_map_test_file.c
+clang -o /dev/null -ffile-prefix-map=$HOME/.cargo= genbindings_path_map_test_file.c > /dev/null 2>&1 &&
+export BASE_CFLAGS="-ffile-prefix-map=$HOME/.cargo="
+
+BASE_CFLAGS="$BASE_CFLAGS -frandom-seed=42"
+LOCAL_CFLAGS="-Wall -Wno-nullability-completeness -pthread -Iinclude/"
+
+if [ "$HOST_PLATFORM" = "host: x86_64-apple-darwin" ]; then
+	export MACOSX_DEPLOYMENT_TARGET=10.9
+	LOCAL_CFLAGS="$LOCAL_CFLAGS -isysroot$(xcrun --show-sdk-path) -mmacosx-version-min=10.9"
+	BASE_CFLAGS="$BASE_CFLAGS -isysroot$(xcrun --show-sdk-path) -mmacosx-version-min=10.9"
+	# Targeting aarch64 appears to be supported only starting with Big Sur, so check it before use
+	clang -o /dev/null $BASE_CFLAGS --target=aarch64-apple-darwin -mcpu=apple-a14 genbindings_path_map_test_file.c &&
+	export CFLAGS_aarch64_apple_darwin="$BASE_CFLAGS --target=aarch64-apple-darwin -mcpu=apple-a14" ||
+	echo "WARNING: Can not build targeting aarch64-apple-darin. Upgrade to Big Sur or try upstream clang"
+fi
+
+rm genbindings_path_map_test_file.c
+
+ENV_TARGET=$(rustc --version --verbose | grep host | awk '{ print $2 }' | sed 's/-/_/g')
+case "$ENV_TARGET" in
+	"x86_64"*)
+		export RUSTFLAGS="$BASE_RUSTFLAGS -C target-cpu=sandybridge"
+		export CFLAGS_$ENV_TARGET="$BASE_CFLAGS -march=sandybridge -mcpu=sandybridge -mtune=sandybridge"
+		;;
+	*)
+		# Assume this isn't targeted at another host and build for the host's CPU.
+		export RUSTFLAGS="$BASE_RUSTFLAGS -C target-cpu=native"
+		export CFLAGS_$ENV_TARGET="$BASE_CFLAGS -mcpu=native"
+		;;
+esac
+
 # First build the latest c-bindings-gen binary
 cd c-bindings-gen && cargo build --release && cd ..
 
@@ -25,6 +76,45 @@ cd c-bindings-gen && cargo build --release && cd ..
 mv lightning-c-bindings/src/c_types/mod.rs ./
 mv lightning-c-bindings/src/bitcoin ./
 
+# Before we try to sed the Cargo.toml, generate version define tags
+# (ignoring any files that we're about to generate)
+
+git checkout lightning-c-bindings/src
+git checkout lightning-c-bindings/include
+BINDINGS_GIT="$(git describe --tag --dirty --abbrev=16)"
+echo "$(cat <<EOF
+#ifndef _LDK_HEADER_VER
+static inline int _ldk_strncmp(const char *s1, const char *s2, uint64_t n) {
+	if (n && *s1 != *s2) return 1;
+	while (n && *s1 != 0 && *s2 != 0) {
+		s1++; s2++; n--;
+		if (n && *s1 != *s2) return 1;
+	}
+	return 0;
+}
+
+#define _LDK_HEADER_VER "${LIGHTNING_GIT}"
+#define _LDK_C_BINDINGS_HEADER_VER "${BINDINGS_GIT}"
+static inline const char* check_get_ldk_version() {
+	LDKStr bin_ver = _ldk_get_compiled_version();
+	if (_ldk_strncmp(_LDK_HEADER_VER, (const char*)bin_ver.chars, bin_ver.len) != 0) {
+	// Version mismatch, we don't know what we're running!
+		return 0;
+	}
+	return _LDK_HEADER_VER;
+}
+static inline const char* check_get_ldk_bindings_version() {
+	LDKStr bin_ver = _ldk_c_bindings_get_compiled_version();
+	if (_ldk_strncmp(_LDK_C_BINDINGS_HEADER_VER, (const char*)bin_ver.chars, bin_ver.len) != 0) {
+	// Version mismatch, we don't know what we're running!
+		return 0;
+	}
+	return _LDK_C_BINDINGS_HEADER_VER;
+}
+#endif /* _LDK_HEADER_VER */
+EOF
+)" >> lightning-c-bindings/include/ldk_ver.h
+
 rm -rf lightning-c-bindings/src
 
 mkdir -p lightning-c-bindings/src/{c_types,lightning}
@@ -34,15 +124,13 @@ mv ./bitcoin lightning-c-bindings/src/
 # Finally, run the c-bindings-gen binary, building fresh bindings.
 OUT="$(pwd)/lightning-c-bindings/src"
 OUT_TEMPL="$(pwd)/lightning-c-bindings/src/c_types/derived.rs"
-OUT_F="$(pwd)/lightning-c-bindings/include/rust_types.h"
+OUT_F="$(pwd)/lightning-c-bindings/include/ldk_rust_types.h"
 OUT_CPP="$(pwd)/lightning-c-bindings/include/lightningpp.hpp"
 BIN="$(pwd)/c-bindings-gen/target/release/c-bindings-gen"
 
-HOST_PLATFORM="$(rustc --version --verbose | grep "host:")"
-
 function add_crate() {
 	pushd "$LIGHTNING_PATH/$1"
-	RUSTC_BOOTSTRAP=1 cargo rustc --profile=check $3 -- -Zunstable-options --pretty=expanded > /tmp/$1-crate-source.txt
+	RUSTC_BOOTSTRAP=1 cargo rustc --profile=check --no-default-features $3 -- --cfg=c_bindings -Zunpretty=expanded > /tmp/$1-crate-source.txt
 	popd
 	if [ "$HOST_PLATFORM" = "host: x86_64-apple-darwin" ]; then
 		sed -i".original" "1i\\
@@ -56,9 +144,9 @@ pub mod $2 {
 	rm /tmp/$1-crate-source.txt
 	if [ "$HOST_PLATFORM" = "host: x86_64-apple-darwin" ]; then
 		# OSX sed is for some reason not compatible with GNU sed
-		sed -E -i '' 's|#?'$1' = \{ .*|'$1' = \{ path = "'"$LIGHTNING_PATH"'/'$1'" '"$4"' }|' lightning-c-bindings/Cargo.toml
+		sed -E -i '' 's|#*'$1' = \{ .*|'$1' = \{ path = "'"$LIGHTNING_PATH"'/'$1'", default-features = false }|' lightning-c-bindings/Cargo.toml
 	else
-		sed -E -i 's|#?'$1' = \{ .*|'$1' = \{ path = "'"$LIGHTNING_PATH"'/'$1'" '"$4"' }|' lightning-c-bindings/Cargo.toml
+		sed -E -i 's|#*'$1' = \{ .*|'$1' = \{ path = "'"$LIGHTNING_PATH"'/'$1'", default-features = false }|' lightning-c-bindings/Cargo.toml
 	fi
 }
 
@@ -73,32 +161,40 @@ function drop_crate() {
 
 echo > /tmp/crate-source.txt
 if [ "$2" = "true" ]; then
-	add_crate lightning lightning --features=allow_wallclock_use ', features = ["allow_wallclock_use"]'
+	add_crate lightning lightning --features=std
 	add_crate "lightning-persister" "lightning_persister"
+	add_crate "lightning-background-processor" "lightning_background_processor"
+	add_crate "lightning-invoice" "lightning_invoice"
+	CARGO_BUILD_ARGS="--features=std"
 else
-	add_crate lightning lightning
+	add_crate lightning lightning --features=no-std
 	drop_crate "lightning-persister"
+	drop_crate "lightning-background-processor"
+	drop_crate "lightning-invoice"
+	CARGO_BUILD_ARGS="--features=no-std"
 fi
-add_crate "lightning-invoice" "lightning_invoice"
 
 cat /tmp/crate-source.txt | RUST_BACKTRACE=1 "$BIN" "$OUT/" "$OUT_TEMPL" "$OUT_F" "$OUT_CPP"
 
-# Set path to include our rustc wrapper as well as cbindgen
-PATH="$(pwd)/deterministic-build-wrappers:$PATH:~/.cargo/bin"
+echo "$(cat <<EOF
+#[no_mangle]
+pub extern "C" fn _ldk_get_compiled_version() -> crate::c_types::Str {
+	"${LIGHTNING_GIT}".into()
+}
+#[no_mangle]
+pub extern "C" fn _ldk_c_bindings_get_compiled_version() -> crate::c_types::Str {
+	"${BINDINGS_GIT}".into()
+}
+EOF
+)" >> lightning-c-bindings/src/version.rs
+
 # Now cd to lightning-c-bindings, build the generated bindings, and call cbindgen to build a C header file
 cd lightning-c-bindings
 
-# Remap paths so that our builds are deterministic
-export RUSTFLAGS="--remap-path-prefix $LIGHTNING_PATH=rust-lightning --remap-path-prefix $(pwd)=ldk-c-bindings --remap-path-prefix $HOME/.cargo= -C target-cpu=generic"
-
-# If the C compiler supports it, also set -ffile-prefix-map
-echo "int main() {}" > genbindings_path_map_test_file.c
-clang -o /dev/null -ffile-prefix-map=$HOME/.cargo= genbindings_path_map_test_file.c > /dev/null 2>&1 &&
-# Now that we've done our last non-LTO build, turn on LTO in CFLAGS as well
-export CFLAGS="-ffile-prefix-map=$HOME/.cargo="
-rm genbindings_path_map_test_file.c
-
-cargo build
+RUSTFLAGS="$RUSTFLAGS --cfg=test_mod_pointers" cargo build $CARGO_BUILD_ARGS
+if [ "$CFLAGS_aarch64_apple_darwin" != "" ]; then
+	RUSTFLAGS="$BASE_RUSTFLAGS -C target-cpu=apple-a14" cargo build $CARGO_BUILD_ARGS --target aarch64-apple-darwin
+fi
 cbindgen -v --config cbindgen.toml -o include/lightning.h >/dev/null 2>&1
 
 # cbindgen is relatively braindead when exporting typedefs -
@@ -110,39 +206,117 @@ if [ "$HOST_PLATFORM" = "host: x86_64-apple-darwin" ]; then
 
 	# stdlib.h doesn't exist in clang's wasm sysroot, and cbindgen
 	# doesn't actually use it anyway, so drop the import.
-	sed -i '' 's/#include <stdlib.h>//g' include/lightning.h
+	sed -i '' 's/#include <stdlib.h>/#include "ldk_rust_types.h"/g' include/lightning.h
 else
 	sed -i 's/typedef LDKnative.*Import.*LDKnative.*;//g' include/lightning.h
 
 	# stdlib.h doesn't exist in clang's wasm sysroot, and cbindgen
 	# doesn't actually use it anyway, so drop the import.
-	sed -i 's/#include <stdlib.h>//g' include/lightning.h
+	sed -i 's/#include <stdlib.h>/#include "ldk_rust_types.h"/g' include/lightning.h
 fi
 
-# Finally, sanity-check the generated C and C++ bindings with demo apps:
-
-LOCAL_CFLAGS="-Wall -Wno-nullability-completeness -pthread"
+# Build C++ class methods which call trait methods
+set +x # Echoing every command is very verbose here
+OLD_IFS="$IFS"
+export IFS=''
+echo '#include <string.h>' > include/lightningpp_new.hpp
+echo 'namespace LDK {' >> include/lightningpp_new.hpp
+echo '// Forward declarations' >> include/lightningpp_new.hpp
+cat include/lightningpp.hpp | sed -n 's/class \(.*\) {/class \1;/p' >> include/lightningpp_new.hpp
+echo '' >> include/lightningpp_new.hpp
+
+DECLS=""
+while read LINE; do
+	case "$LINE" in
+		"#include <string.h>")
+			# We already printed this above.
+			;;
+		"namespace LDK {")
+			# We already printed this above.
+			;;
+		"}")
+			# We'll print this at the end
+			;;
+		"XXX"*)
+			NEW_STRUCT_NAME="$(echo "$LINE" | awk '{ print $2 }')"
+			if [ "$NEW_STRUCT_NAME" != "$STRUCT_NAME" ]; then
+				STRUCT_CONTENTS="$(cat include/lightning.h  | sed -n -e "/struct LDK$NEW_STRUCT_NAME/{:s" -e "/\} LDK$NEW_STRUCT_NAME;/!{N" -e "b s" -e "}" -e p -e "}")"
+			fi
+			STRUCT_NAME="$NEW_STRUCT_NAME"
+			METHOD_NAME="$(echo "$LINE" | awk '{ print $3 }')"
+			METHOD="$(echo "$STRUCT_CONTENTS" | grep "(\*$METHOD_NAME)")"
+			if [ "$METHOD" = "" ]; then
+				echo "Unable to find method declaration for $LINE"
+				exit 1
+			fi
+			RETVAL="$(echo "$METHOD" | sed 's/[ ]*\([A-Za-z0-9 _]*\)(\*\(.*\)).*/\1/' | sed 's/^struct LDK/LDK::/g' | tr -d ' ')"
+			[ "$RETVAL" = "LDK::SecretKey" ] && RETVAL="LDKSecretKey"
+			[ "$RETVAL" = "LDK::PublicKey" ] && RETVAL="LDKPublicKey"
+			[ "$RETVAL" = "LDK::ThirtyTwoBytes" ] && RETVAL="LDKThirtyTwoBytes"
+			PARAMS="$(echo "$METHOD" | sed 's/.*(\*.*)(\(const \)*void \*this_arg\(, \)*\(.*\));/\3/')"
+
+			echo -e "\tinline $RETVAL $METHOD_NAME($PARAMS);" >> include/lightningpp_new.hpp
+			DECLS="$DECLS"$'\n'"inline $RETVAL $STRUCT_NAME::$METHOD_NAME($PARAMS) {"
+
+			DECLS="$DECLS"$'\n'$'\t'
+			[ "$RETVAL" != "void" ] && DECLS="$DECLS$RETVAL ret = "
+			DECLS="$DECLS(self.$METHOD_NAME)(self.this_arg"
+
+			IFS=','; for PARAM in $PARAMS; do
+				DECLS="$DECLS, "
+				DECLS="$DECLS$(echo $PARAM | sed 's/.* (*\**\([a-zA-Z0-9_]*\)\()[\[0-9\]*]\)*/\1/')"
+			done
+			IFS=''
+
+			DECLS="$DECLS);"
+			[ "$RETVAL" != "void" ] && DECLS="$DECLS"$'\n'$'\t'"return ret;"
+			DECLS="$DECLS"$'\n'"}"
+			;;
+		*)
+			echo "$LINE" >> include/lightningpp_new.hpp
+	esac
+done < include/lightningpp.hpp
+echo "$DECLS" >> include/lightningpp_new.hpp
+echo "}" >> include/lightningpp_new.hpp
+export IFS="$OLD_IFS"
+set -x
+mv include/lightningpp_new.hpp include/lightningpp.hpp
 
+# Finally, sanity-check the generated C and C++ bindings with demo apps:
 # Naively run the C demo app:
-gcc $LOCAL_CFLAGS -Wall -g -pthread demo.c target/debug/libldk.a -ldl
+gcc $LOCAL_CFLAGS -Wall -g -pthread demo.c target/debug/libldk.a -ldl -lm
 ./a.out
 
-# And run the C++ demo app in valgrind to test memory model correctness and lack of leaks.
-g++ $LOCAL_CFLAGS -std=c++11 -Wall -g -pthread demo.cpp -Ltarget/debug/ -lldk -ldl
-if [ -x "`which valgrind`" ]; then
-	LD_LIBRARY_PATH=target/debug/ valgrind --error-exitcode=4 --memcheck:leak-check=full --show-leak-kinds=all ./a.out
-	echo
-else
-	echo "WARNING: Please install valgrind for more testing"
+# And run the C++ demo app
+if [ "$2" = "true" ]; then
+	g++ $LOCAL_CFLAGS -std=c++11 -Wall -g -pthread demo.cpp -Ltarget/debug/ -lldk -ldl
+	LD_LIBRARY_PATH=target/debug/ ./a.out > /dev/null
+fi
+
+# Finally, run the C++ demo app with our native networking library
+# in valgrind to test memory model correctness and lack of leaks.
+gcc $LOCAL_CFLAGS -fPIC -std=c99 -Wall -g -pthread -I../ldk-net ../ldk-net/ldk_net.c -c -o ldk_net.o
+if [ "$2" = "true" ]; then
+	g++ $LOCAL_CFLAGS -std=c++11 -Wall -g -pthread -DREAL_NET -I../ldk-net ldk_net.o demo.cpp target/debug/libldk.a -ldl -lm
+	if [ -x "`which valgrind`" ]; then
+		valgrind --error-exitcode=4 --memcheck:leak-check=full --show-leak-kinds=all ./a.out
+		echo
+	else
+		echo "WARNING: Please install valgrind for more testing"
+		./a.out
+	fi
 fi
 
+
 # Test a statically-linked C++ version, tracking the resulting binary size and runtime
 # across debug, LTO, and cross-language LTO builds (using the same compiler each time).
-clang++ $LOCAL_CFLAGS -std=c++11 demo.cpp target/debug/libldk.a -ldl
-strip ./a.out
-echo " C++ Bin size and runtime w/o optimization:"
-ls -lha a.out
-time ./a.out > /dev/null
+if [ "$2" = "true" ]; then
+	clang++ $LOCAL_CFLAGS -std=c++11 demo.cpp target/debug/libldk.a -ldl
+	strip ./a.out
+	echo " C++ Bin size and runtime w/o optimization:"
+	ls -lha a.out
+	time ./a.out > /dev/null
+fi
 
 # Then, check with memory sanitizer, if we're on Linux and have rustc nightly
 if [ "$HOST_PLATFORM" = "host: x86_64-unknown-linux-gnu" ]; then
@@ -150,7 +324,7 @@ if [ "$HOST_PLATFORM" = "host: x86_64-unknown-linux-gnu" ]; then
 		LLVM_V=$(rustc +nightly --version --verbose | grep "LLVM version" | awk '{ print substr($3, 0, 2); }')
 		if [ -x "$(which clang-$LLVM_V)" ]; then
 			cargo +nightly clean
-			cargo +nightly rustc -Zbuild-std --target x86_64-unknown-linux-gnu -v -- -Zsanitizer=memory -Zsanitizer-memory-track-origins -Cforce-frame-pointers=yes
+			cargo +nightly rustc $CARGO_BUILD_ARGS -Zbuild-std=std,panic_abort --target x86_64-unknown-linux-gnu -v -- -Zsanitizer=memory -Zsanitizer-memory-track-origins -Cforce-frame-pointers=yes
 			mv target/x86_64-unknown-linux-gnu/debug/libldk.* target/debug/
 
 			# Sadly, std doesn't seem to compile into something that is memsan-safe as of Aug 2020,
@@ -162,9 +336,16 @@ if [ "$HOST_PLATFORM" = "host: x86_64-unknown-linux-gnu" ]; then
 			clang-$LLVM_V $LOCAL_CFLAGS -fsanitize=memory -fsanitize-memory-track-origins -g demo.c target/debug/libldk.a -ldl
 			./a.out
 
-			# ...then the C++ demo app
-			clang++-$LLVM_V $LOCAL_CFLAGS -std=c++11 -fsanitize=memory -fsanitize-memory-track-origins -g demo.cpp target/debug/libldk.a -ldl
-			./a.out >/dev/null
+			if [ "$2" = "true" ]; then
+				# ...then the C++ demo app
+				clang++-$LLVM_V $LOCAL_CFLAGS -std=c++11 -fsanitize=memory -fsanitize-memory-track-origins -g demo.cpp target/debug/libldk.a -ldl
+				./a.out >/dev/null
+
+				# ...then the C++ demo app with the ldk_net network implementation
+				clang-$LLVM_V $LOCAL_CFLAGS -std=c99 -fsanitize=memory -fsanitize-memory-track-origins -g -I../ldk-net ../ldk-net/ldk_net.c -c -o ldk_net.o
+				clang++-$LLVM_V $LOCAL_CFLAGS -std=c++11 -fsanitize=memory -fsanitize-memory-track-origins -g -DREAL_NET -I../ldk-net ldk_net.o demo.cpp target/debug/libldk.a -ldl
+				./a.out >/dev/null
+			fi
 
 			# restore exit-on-failure
 			set -e
@@ -178,37 +359,61 @@ else
 	echo "WARNING: Can't use memory sanitizer on non-Linux, non-x86 platforms"
 fi
 
-RUSTC_LLVM_V=$(rustc --version --verbose | grep "LLVM version" | awk '{ print substr($3, 0, 2); }' | tr -d '.')
+RUSTC_LLVM_V=$(rustc --version --verbose | grep "LLVM version" | awk '{ print substr($3, 0, 2); }')
 
 if [ "$HOST_PLATFORM" = "host: x86_64-apple-darwin" ]; then
-	# Apple is special, as always, and decided that they must ensure that there is no way to identify
-	# the LLVM version used. Why? Just to make your life hard.
-	# This list is taken from https://en.wikipedia.org/wiki/Xcode
-	APPLE_CLANG_V=$(clang --version | head -n1 | awk '{ print $4 }')
-	if [ "$APPLE_CLANG_V" = "10.0.0" ]; then
-		CLANG_LLVM_V="6"
-	elif [ "$APPLE_CLANG_V" = "10.0.1" ]; then
-		CLANG_LLVM_V="7"
-	elif [ "$APPLE_CLANG_V" = "11.0.0" ]; then
-		CLANG_LLVM_V="8"
-	elif [ "$APPLE_CLANG_V" = "11.0.3" ]; then
-		CLANG_LLVM_V="9"
-	elif [ "$APPLE_CLANG_V" = "12.0.0" ]; then
-		CLANG_LLVM_V="10"
-	else
-		echo "WARNING: Unable to identify Apple clang LLVM version"
+	# Apple is special, as always, and their versions of clang aren't
+	# compatible with upstream LLVM.
+	if [ "$(clang --version | grep 'Apple clang')" != "" ]; then
+		echo "Apple clang isn't compatible with upstream clang, install upstream clang"
 		CLANG_LLVM_V="0"
+	else
+		CLANG_LLVM_V=$(clang --version | head -n1 | awk '{ print substr($3, 0, 2); }')
+		if [ -x "$(which ld64.lld)" ]; then
+			LLD_LLVM_V="$(ld64.lld --version | awk '{ print substr($2, 0, 2); }')"
+		fi
 	fi
 else
-	CLANG_LLVM_V=$(clang --version | head -n1 | awk '{ print substr($4, 0, 2); }' | tr -d '.')
+	CLANG_LLVM_V=$(clang --version | head -n1 | awk '{ print substr($4, 0, 2); }')
+	if [ -x "$(which ld.lld)" ]; then
+		LLD_LLVM_V="$(ld.lld --version | awk '{ print $2; }')"
+		if [ "$LLD_LLVM_V" = "LLD" ]; then # eg if the output is "Debian LLD ..."
+			LLD_LLVM_V="$(ld.lld --version | awk '{ print substr($3, 0, 2); }')"
+		else
+			LLD_LLVM_V="$(ld.lld --version | awk '{ print substr($2, 0, 2); }')"
+		fi
+	fi
 fi
 
+
 if [ "$CLANG_LLVM_V" = "$RUSTC_LLVM_V" ]; then
 	CLANG=clang
 	CLANGPP=clang++
-elif [ "$(which clang-$RUSTC_LLVM_V)" != "" ]; then
+	if [ "$LLD_LLVM_V" = "$CLANG_LLVM_V" ]; then
+		LLD=lld
+	fi
+elif [ -x "$(which clang-$RUSTC_LLVM_V)" ]; then
 	CLANG="$(which clang-$RUSTC_LLVM_V)"
-	CLANGPP="$(which clang++-$RUSTC_LLVM_V)"
+	CLANGPP="$(which clang++-$RUSTC_LLVM_V || echo clang++)"
+	if [ "$($CLANG --version)" != "$($CLANGPP --version)" ]; then
+		echo "$CLANG and $CLANGPP are not the same version of clang!"
+		unset CLANG
+		unset CLANGPP
+	fi
+	if [ "$LLD_LLVM_V" != "$RUSTC_LLVM_V" ]; then
+		LLD="lld"
+		[ -x "$(which lld-$RUSTC_LLVM_V)" ] && LLD="lld-$RUSTC_LLVM_V"
+		LLD_LLVM_V="$(ld.lld-$RUSTC_LLVM_V --version | awk '{ print $2; }')"
+		if [ "$LLD_LLVM_V" = "LLD" ]; then # eg if the output is "Debian LLD ..."
+			LLD_LLVM_V="$(ld.lld-$RUSTC_LLVM_V --version | awk '{ print substr($3, 0, 2); }')"
+		else
+			LLD_LLVM_V="$(ld.lld-$RUSTC_LLVM_V --version | awk '{ print substr($2, 0, 2); }')"
+		fi
+		if [ "$LLD_LLVM_V" != "$RUSTC_LLVM_V" ]; then
+			echo "Could not find a workable version of lld, not using cross-language LTO"
+			unset LLD
+		fi
+	fi
 fi
 
 if [ "$CLANG" != "" -a "$CLANGPP" = "" ]; then
@@ -225,16 +430,26 @@ if [ "$HOST_PLATFORM" = "host: x86_64-unknown-linux-gnu" -o "$HOST_PLATFORM" = "
 		else
 			sed -i.bk 's/,"cdylib"]/]/g' Cargo.toml
 		fi
-		RUSTC_BOOTSTRAP=1 cargo rustc -v -- -Zsanitizer=address -Cforce-frame-pointers=yes || ( mv Cargo.toml.bk Cargo.toml; exit 1)
+		if [ "$CFLAGS_aarch64_apple_darwin" != "" ]; then
+			RUSTFLAGS="$BASE_RUSTFLAGS -C target-cpu=apple-a14" RUSTC_BOOTSTRAP=1 cargo rustc $CARGO_BUILD_ARGS --target aarch64-apple-darwin -v -- -Zsanitizer=address -Cforce-frame-pointers=yes || ( mv Cargo.toml.bk Cargo.toml; exit 1)
+		fi
+		RUSTFLAGS="$RUSTFLAGS --cfg=test_mod_pointers" RUSTC_BOOTSTRAP=1 cargo rustc $CARGO_BUILD_ARGS -v -- -Zsanitizer=address -Cforce-frame-pointers=yes || ( mv Cargo.toml.bk Cargo.toml; exit 1)
 		mv Cargo.toml.bk Cargo.toml
 
 		# First the C demo app...
 		$CLANG $LOCAL_CFLAGS -fsanitize=address -g demo.c target/debug/libldk.a -ldl
 		ASAN_OPTIONS='detect_leaks=1 detect_invalid_pointer_pairs=1 detect_stack_use_after_return=1' ./a.out
 
-		# ...then the C++ demo app
-		$CLANGPP $LOCAL_CFLAGS -std=c++11 -fsanitize=address -g demo.cpp target/debug/libldk.a -ldl
-		ASAN_OPTIONS='detect_leaks=1 detect_invalid_pointer_pairs=1 detect_stack_use_after_return=1' ./a.out >/dev/null
+		if [ "$2" = "true" ]; then
+			# ...then the C++ demo app
+			$CLANGPP $LOCAL_CFLAGS -std=c++11 -fsanitize=address -g demo.cpp target/debug/libldk.a -ldl
+			ASAN_OPTIONS='detect_leaks=1 detect_invalid_pointer_pairs=1 detect_stack_use_after_return=1' ./a.out >/dev/null
+
+			# ...then the C++ demo app with the ldk_net network implementation
+			$CLANG $LOCAL_CFLAGS -fPIC -fsanitize=address -g -I../ldk-net ../ldk-net/ldk_net.c -c -o ldk_net.o
+			$CLANGPP $LOCAL_CFLAGS -std=c++11 -fsanitize=address -g -DREAL_NET -I../ldk-net ldk_net.o demo.cpp target/debug/libldk.a -ldl
+			ASAN_OPTIONS='detect_leaks=1 detect_invalid_pointer_pairs=1 detect_stack_use_after_return=1' ./a.out >/dev/null
+		fi
 	else
 		echo "WARNING: Please install clang-$RUSTC_LLVM_V and clang++-$RUSTC_LLVM_V to build with address sanitizer"
 	fi
@@ -245,52 +460,88 @@ fi
 # Now build with LTO on on both C++ and rust, but without cross-language LTO:
 # Clear stale release build artifacts from previous runs
 cargo clean --release
-CARGO_PROFILE_RELEASE_LTO=true cargo rustc -v --release -- -C lto
-clang++ $LOCAL_CFLAGS -std=c++11 -flto -O2 demo.cpp target/release/libldk.a -ldl
+CARGO_PROFILE_RELEASE_LTO=true cargo rustc $CARGO_BUILD_ARGS -v --release -- -C lto
+if [ "$2" = "true" ]; then
+	clang++ $LOCAL_CFLAGS -std=c++11 -O2 demo.cpp target/release/libldk.a -ldl
+fi
+
+strip ./a.out
+echo "C++ Bin size and runtime with only RL (LTO) optimized:"
+ls -lha a.out
+time ./a.out > /dev/null
 
-if [ "$HOST_PLATFORM" != "host: x86_64-apple-darwin" -a "$CLANGPP" != "" ]; then
+if [ "$CLANGPP" != "" ]; then
 	# If we can use cross-language LTO, use it for building C dependencies (i.e. libsecp256k1) as well
 	export CC="$CLANG"
-	export CFLAGS_wasm32_wasi="-target wasm32"
+	# The cc-rs crate tries to force -fdata-sections and -ffunction-sections on, which
+	# breaks -fembed-bitcode, so we turn off cc-rs' default flags and specify exactly
+	# what we want here.
+	export CFLAGS_$ENV_TARGET="$BASE_CFLAGS -fPIC -fembed-bitcode -march=sandybridge -mcpu=sandybridge -mtune=sandybridge"
+	export CRATE_CC_NO_DEFAULTS=true
 fi
 
 if [ "$2" = "false" -a "$(rustc --print target-list | grep wasm32-wasi)" != "" ]; then
 	# Test to see if clang supports wasm32 as a target (which is needed to build rust-secp256k1)
 	echo "int main() {}" > genbindings_wasm_test_file.c
-	clang -nostdlib -o /dev/null --target=wasm32-wasi -Wl,--no-entry genbindings_wasm_test_file.c > /dev/null 2>&1 &&
-	# And if it does, build a WASM binary without capturing errors
-	cargo rustc -v --target=wasm32-wasi -- -C embed-bitcode=yes &&
-	# Now that we've done our last non-LTO build, turn on LTO in CFLAGS as well
-	export CFLAGS="$CFLAGS -flto" &&
-	CARGO_PROFILE_RELEASE_LTO=true cargo rustc -v --release --target=wasm32-wasi -- -C opt-level=s -C linker-plugin-lto -C lto ||
-	echo "Cannot build WASM lib as clang does not seem to support the wasm32-wasi target"
+	if clang -nostdlib -o /dev/null --target=wasm32-wasi -Wl,--no-entry genbindings_wasm_test_file.c > /dev/null 2>&1; then
+		# And if it does, build a WASM binary without capturing errors
+		export CFLAGS_wasm32_wasi="$BASE_CFLAGS -target wasm32"
+		RUSTFLAGS="$RUSTFLAGS --cfg=test_mod_pointers" cargo rustc $CARGO_BUILD_ARGS -v --target=wasm32-wasi
+		export CFLAGS_wasm32_wasi="$BASE_CFLAGS -target wasm32 -Os"
+		CARGO_PROFILE_RELEASE_LTO=true cargo rustc $CARGO_BUILD_ARGS -v --release --target=wasm32-wasi -- -C embed-bitcode=yes -C opt-level=s -C linker-plugin-lto -C lto
+	else
+		echo "Cannot build WASM lib as clang does not seem to support the wasm32-wasi target"
+	fi
 	rm genbindings_wasm_test_file.c
 fi
 
-strip ./a.out
-echo "C++ Bin size and runtime with only RL (LTO) optimized:"
-ls -lha a.out
-time ./a.out > /dev/null
+EXTRA_TARGETS=( $LDK_C_BINDINGS_EXTRA_TARGETS )
+EXTRA_CCS=( $LDK_C_BINDINGS_EXTRA_TARGET_CCS )
 
-if [ "$HOST_PLATFORM" != "host: x86_64-apple-darwin" -a "$CLANGPP" != "" ]; then
+if [ ${#EXTRA_TARGETS[@]} != ${#EXTRA_CCS[@]} ]; then
+	echo "LDK_C_BINDINGS_EXTRA_TARGETS and LDK_C_BINDINGS_EXTRA_TARGET_CCS didn't have the same number of elements!"
+	exit 1
+fi
+
+for IDX in ${!EXTRA_TARGETS[@]}; do
+	EXTRA_ENV_TARGET=$(echo "${EXTRA_TARGETS[$IDX]}" | sed 's/-/_/g')
+	export CFLAGS_$EXTRA_ENV_TARGET="$BASE_CFLAGS"
+	export CC_$EXTRA_ENV_TARGET=${EXTRA_CCS[$IDX]}
+	RUSTFLAGS="$BASE_RUSTFLAGS -C linker=${EXTRA_CCS[$IDX]}" CARGO_PROFILE_RELEASE_LTO=true cargo rustc $CARGO_BUILD_ARGS -v --release --target "${EXTRA_TARGETS[$IDX]}" -- -C lto
+done
+
+if [ "$CLANGPP" != "" -a "$LLD" != "" ]; then
 	# Finally, test cross-language LTO. Note that this will fail if rustc and clang++
 	# build against different versions of LLVM (eg when rustc is installed via rustup
 	# or Ubuntu packages). This should work fine on Distros which do more involved
 	# packaging than simply shipping the rustup binaries (eg Debian should Just Work
 	# here).
-	# The cc-rs crate tries to force -fdata-sections and -ffunction-sections on, which
-	# breaks -fembed-bitcode, so we turn off cc-rs' default flags and specify exactly
-	# what we want here.
-	export CFLAGS="$CFLAGS -O3 -fPIC -fembed-bitcode"
-	export CRATE_CC_NO_DEFAULTS=true
+	LINK_ARG_FLAGS="-C link-arg=-fuse-ld=$LLD"
+	if [ "$HOST_PLATFORM" = "host: x86_64-apple-darwin" ]; then
+		export LDK_CLANG_PATH=$(which $CLANG)
+		export CLANG="$(pwd)/../deterministic-build-wrappers/clang-lto-link-osx"
+		for ARG in "CFLAGS_aarch64_apple_darwin"; do
+			MANUAL_LINK_CFLAGS="$MANUAL_LINK_CFLAGS -C link-arg=$ARG"
+		done
+		export CFLAGS_aarch64_apple_darwin="$CFLAGS_aarch64_apple_darwin -O3 -fPIC -fembed-bitcode"
+		LINK_ARG_FLAGS="$LINK_ARG_FLAGS -C link-arg="-isysroot$(xcrun --show-sdk-path)" -C link-arg=-mmacosx-version-min=10.9"
+		RUSTFLAGS="$BASE_RUSTFLAGS -C target-cpu=apple-a14" CARGO_PROFILE_RELEASE_LTO=true cargo rustc $CARGO_BUILD_ARGS -v --release --target aarch64-apple-darwin -- -C linker-plugin-lto -C lto -C linker=$CLANG $LINK_ARG_FLAGS -C link-arg=-mcpu=apple-a14
+	fi
+	export CFLAGS_$ENV_TARGET="$BASE_CFLAGS -O3 -fPIC -fembed-bitcode -march=sandybridge -mcpu=sandybridge -mtune=sandybridge"
 	# Rust doesn't recognize CFLAGS changes, so we need to clean build artifacts
 	cargo clean --release
-	CARGO_PROFILE_RELEASE_LTO=true cargo rustc -v --release -- -C linker-plugin-lto -C lto -C link-arg=-fuse-ld=lld
-	$CLANGPP $LOCAL_CFLAGS -flto -fuse-ld=lld -O2 demo.cpp target/release/libldk.a -ldl
-	strip ./a.out
-	echo "C++ Bin size and runtime with cross-language LTO:"
-	ls -lha a.out
-	time ./a.out > /dev/null
+	CARGO_PROFILE_RELEASE_LTO=true cargo rustc $CARGO_BUILD_ARGS -v --release -- -C linker-plugin-lto -C lto -C linker=$CLANG $LINK_ARG_FLAGS -C link-arg=-march=sandybridge -C link-arg=-mcpu=sandybridge -C link-arg=-mtune=sandybridge
+
+	if [ "$2" = "true" ]; then
+		$CLANGPP $LOCAL_CFLAGS -flto -fuse-ld=$LLD -O2 demo.cpp target/release/libldk.a -ldl
+		strip ./a.out
+		echo "C++ Bin size and runtime with cross-language LTO:"
+		ls -lha a.out
+		time ./a.out > /dev/null
+	fi
 else
-	echo "WARNING: Building with cross-language LTO is not avilable on OSX or without clang-$RUSTC_LLVM_V"
+	if [ "$CFLAGS_aarch64_apple_darwin" != "" ]; then
+		RUSTFLAGS="$BASE_RUSTFLAGS -C target-cpu=apple-a14" CARGO_PROFILE_RELEASE_LTO=true cargo rustc $CARGO_BUILD_ARGS -v --release --target aarch64-apple-darwin -- -C lto
+	fi
+	echo "WARNING: Building with cross-language LTO is not avilable without clang-$RUSTC_LLVM_V"
 fi