# Set up CFLAGS and RUSTFLAGS vars appropriately for building libsecp256k1 and demo apps...
BASE_CFLAGS="" # CFLAGS for libsecp256k1
LOCAL_CFLAGS="" # CFLAGS for demo apps
-BASE_RUSTFLAGS="" # RUSTFLAGS
# Remap paths so that our builds are deterministic
-BASE_RUSTFLAGS="--remap-path-prefix $LIGHTNING_PATH=rust-lightning --remap-path-prefix $(pwd)=ldk-c-bindings --remap-path-prefix $HOME/.cargo="
+BASE_RUSTFLAGS="--cfg=c_bindings --remap-path-prefix $LIGHTNING_PATH=rust-lightning --remap-path-prefix $(pwd)=ldk-c-bindings --remap-path-prefix $HOME/.cargo="
# If the C compiler supports it, also set -ffile-prefix-map
echo "int main() {}" > genbindings_path_map_test_file.c
git checkout lightning-c-bindings/src
git checkout lightning-c-bindings/include
BINDINGS_GIT="$(git describe --tag --dirty --abbrev=16)"
-echo -e "#ifndef _LDK_HEADER_VER" > lightning-c-bindings/include/ldk_ver.h
-echo -e "static inline int _ldk_strncmp(const char *s1, const char *s2, uint64_t n) {" >> lightning-c-bindings/include/ldk_ver.h
-echo -e "\tif (n && *s1 != *s2) return 1;" >> lightning-c-bindings/include/ldk_ver.h
-echo -e "\twhile (n && *s1 != 0 && *s2 != 0) {" >> lightning-c-bindings/include/ldk_ver.h
-echo -e "\t\ts1++; s2++; n--;" >> lightning-c-bindings/include/ldk_ver.h
-echo -e "\t\tif (n && *s1 != *s2) return 1;" >> lightning-c-bindings/include/ldk_ver.h
-echo -e "\t}" >> lightning-c-bindings/include/ldk_ver.h
-echo -e "\treturn 0;" >> lightning-c-bindings/include/ldk_ver.h
-echo -e "}" >> lightning-c-bindings/include/ldk_ver.h
-echo -e "" >> lightning-c-bindings/include/ldk_ver.h
-echo -e "#define _LDK_HEADER_VER \"$LIGHTNING_GIT\"" >> lightning-c-bindings/include/ldk_ver.h
-echo -e "#define _LDK_C_BINDINGS_HEADER_VER \"$BINDINGS_GIT\"" >> lightning-c-bindings/include/ldk_ver.h
-echo -e "static inline const char* check_get_ldk_version() {" >> lightning-c-bindings/include/ldk_ver.h
-echo -e "\tLDKStr bin_ver = _ldk_get_compiled_version();" >> lightning-c-bindings/include/ldk_ver.h
-echo -e "\tif (_ldk_strncmp(_LDK_HEADER_VER, (const char*)bin_ver.chars, bin_ver.len) != 0) {" >> lightning-c-bindings/include/ldk_ver.h
-echo -e "\t// Version mismatch, we don't know what we're running!" >> lightning-c-bindings/include/ldk_ver.h
-echo -e "\t\treturn 0;" >> lightning-c-bindings/include/ldk_ver.h
-echo -e "\t}" >> lightning-c-bindings/include/ldk_ver.h
-echo -e "\treturn _LDK_HEADER_VER;" >> lightning-c-bindings/include/ldk_ver.h
-echo -e "}" >> lightning-c-bindings/include/ldk_ver.h
-echo -e "static inline const char* check_get_ldk_bindings_version() {" >> lightning-c-bindings/include/ldk_ver.h
-echo -e "\tLDKStr bin_ver = _ldk_c_bindings_get_compiled_version();" >> lightning-c-bindings/include/ldk_ver.h
-echo -e "\tif (_ldk_strncmp(_LDK_C_BINDINGS_HEADER_VER, (const char*)bin_ver.chars, bin_ver.len) != 0) {" >> lightning-c-bindings/include/ldk_ver.h
-echo -e "\t// Version mismatch, we don't know what we're running!" >> lightning-c-bindings/include/ldk_ver.h
-echo -e "\t\treturn 0;" >> lightning-c-bindings/include/ldk_ver.h
-echo -e "\t}" >> lightning-c-bindings/include/ldk_ver.h
-echo -e "\treturn _LDK_C_BINDINGS_HEADER_VER;" >> lightning-c-bindings/include/ldk_ver.h
-echo -e "}" >> lightning-c-bindings/include/ldk_ver.h
-echo -e "#endif /* _LDK_HEADER_VER */" >> lightning-c-bindings/include/ldk_ver.h
+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 "${BINDINGS_GIT}"
+static inline const char* check_get_ldk_version() {
+ LDKStr bin_ver = _ldk_get_compiled_version();
+ if (_ldk_strncmp(_LDK_HEADER_VER, (const char*)bin_ver.chars, bin_ver.len) != 0) {
+ // Version mismatch, we don't know what we're running!
+ return 0;
+ }
+ return _LDK_HEADER_VER;
+}
+static inline const char* check_get_ldk_bindings_version() {
+ LDKStr bin_ver = _ldk_c_bindings_get_compiled_version();
+ if (_ldk_strncmp(_LDK_C_BINDINGS_HEADER_VER, (const char*)bin_ver.chars, bin_ver.len) != 0) {
+ // Version mismatch, we don't know what we're running!
+ return 0;
+ }
+ return _LDK_C_BINDINGS_HEADER_VER;
+}
+#endif /* _LDK_HEADER_VER */
+EOF
+)" >> lightning-c-bindings/include/ldk_ver.h
rm -rf lightning-c-bindings/src
function add_crate() {
pushd "$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 $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\\
echo > /tmp/crate-source.txt
if [ "$2" = "true" ]; then
- add_crate lightning lightning --features=allow_wallclock_use ', features = ["allow_wallclock_use"]'
+ add_crate lightning lightning --features=std ', features = ["std"]'
add_crate "lightning-persister" "lightning_persister"
add_crate "lightning-background-processor" "lightning_background_processor"
else
- add_crate lightning lightning
+ add_crate lightning lightning --features=no-std ', features = ["no-std"]'
drop_crate "lightning-persister"
drop_crate "lightning-background-processor"
fi
cat /tmp/crate-source.txt | RUST_BACKTRACE=1 "$BIN" "$OUT/" "$OUT_TEMPL" "$OUT_F" "$OUT_CPP"
-echo -e '#[no_mangle]' >> lightning-c-bindings/src/version.rs
-echo -e 'pub extern "C" fn _ldk_get_compiled_version() -> crate::c_types::Str {' >> lightning-c-bindings/src/version.rs
-echo -e '\t"'"$LIGHTNING_GIT"'".into()' >> lightning-c-bindings/src/version.rs
-echo -e '}' >> lightning-c-bindings/src/version.rs
-echo -e '#[no_mangle]' >> lightning-c-bindings/src/version.rs
-echo -e 'pub extern "C" fn _ldk_c_bindings_get_compiled_version() -> crate::c_types::Str {' >> lightning-c-bindings/src/version.rs
-echo -e '\t"'"$BINDINGS_GIT"'".into()' >> lightning-c-bindings/src/version.rs
-echo -e '}' >> lightning-c-bindings/src/version.rs
+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 {
+ "${BINDINGS_GIT}".into()
+}
+EOF
+)" >> lightning-c-bindings/src/version.rs
# Now cd to lightning-c-bindings, build the generated bindings, and call cbindgen to build a C header file
cd lightning-c-bindings
# We'll print this at the end
;;
"XXX"*)
- STRUCT_NAME="$(echo "$LINE" | awk '{ print $2 }')"
+ NEW_STRUCT_NAME="$(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 $3 }')"
- STRUCT_CONTENTS="$(cat include/lightning.h | sed -n -e "/struct LDK$STRUCT_NAME/{:s" -e "/\} LDK$STRUCT_NAME;/!{N" -e "b s" -e "}" -e p -e "}")"
METHOD="$(echo "$STRUCT_CONTENTS" | grep "(\*$METHOD_NAME)")"
if [ "$METHOD" = "" ]; then
echo "Unable to find method declaration for $LINE"
./a.out
# And run the C++ demo app
-g++ $LOCAL_CFLAGS -std=c++11 -Wall -g -pthread demo.cpp -Ltarget/debug/ -lldk -ldl
-LD_LIBRARY_PATH=target/debug/ ./a.out > /dev/null
+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
-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
+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
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 $LOCAL_CFLAGS -std=c++11 -fsanitize=memory -fsanitize-memory-track-origins -g -DREAL_NET -I../ldk-net ldk_net.o demo.cpp target/debug/libldk.a -ldl
- ./a.out >/dev/null
+ # ...then the C++ demo app with the ldk_net network implementation
+ clang-$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 $LOCAL_CFLAGS -std=c++11 -fsanitize=memory -fsanitize-memory-track-origins -g -DREAL_NET -I../ldk-net ldk_net.o demo.cpp target/debug/libldk.a -ldl
+ ./a.out >/dev/null
+ fi
# restore exit-on-failure
set -e
echo "Apple clang isn't compatible with upstream clang, install upstream clang"
CLANG_LLVM_V="0"
else
- CLANG_LLVM_V=$(clang --version | head -n1 | awk '{ print substr($4, 0, 2); }')
+ CLANG_LLVM_V=$(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($2, 0, 2); }')"
fi
else
CLANG_LLVM_V=$(clang --version | head -n1 | awk '{ print substr($4, 0, 2); }')
if [ -x "$(which ld.lld)" ]; then
- LLD_LLVM_V="$(ld.lld --version | awk '{ print substr($2, 0, 2); }')"
+ LLD_LLVM_V="$(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($2, 0, 2); }')"
+ fi
fi
fi
unset CLANGPP
fi
if [ "$LLD_LLVM_V" != "$RUSTC_LLVM_V" ]; then
- LLD="$(which lld-$RUSTC_LLVM_V || echo lld)"
- LLD_LLVM_V="$(ld.$LLD --version | awk '{ print substr($2, 0, 2); }')"
+ LLD="lld"
+ [ -x "$(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
$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
+ # ...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
# 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 -O2 demo.cpp target/release/libldk.a -ldl
+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="$CLANG"
# The cc-rs crate tries to force -fdata-sections and -ffunction-sections on, which
# breaks -fembed-bitcode, so we turn off cc-rs' default flags and specify exactly
# what we want here.
- export CFLAGS_$ENV_TARGET="$BASE_CFLAGS -fPIC -fembed-bitcode -march=sandybridge"
+ export CFLAGS_$ENV_TARGET="$BASE_CFLAGS -fPIC -fembed-bitcode -march=sandybridge -mcpu=sandybridge -mtune=sandybridge"
export CRATE_CC_NO_DEFAULTS=true
fi
RUSTFLAGS="$BASE_RUSTFLAGS -C linker=${EXTRA_CCS[$IDX]}" CARGO_PROFILE_RELEASE_LTO=true cargo rustc -v --release --target "${EXTRA_TARGETS[$IDX]}" -- -C lto
done
-if [ "$CFLAGS_aarch64_apple_darwin" != "" ]; then
- RUSTFLAGS="$BASE_RUSTFLAGS -C target-cpu=apple-a14" CARGO_PROFILE_RELEASE_LTO=true cargo rustc -v --release --target aarch64-apple-darwin -- -C lto
-fi
-
-if [ "$HOST_PLATFORM" != "host: x86_64-apple-darwin" -a "$CLANGPP" != "" -a "$LLD" != "" ]; then
+if [ "$CLANGPP" != "" -a "$LLD" != "" ]; then
# Finally, test cross-language LTO. Note that this will fail if rustc and clang++
# build against different versions of LLVM (eg when rustc is installed via rustup
# or Ubuntu packages). This should work fine on Distros which do more involved
# packaging than simply shipping the rustup binaries (eg Debian should Just Work
# here).
- export CFLAGS_$ENV_TARGET="$BASE_CFLAGS -O3 -fPIC -fembed-bitcode -march=sandybridge"
+ LINK_ARG_FLAGS="-C link-arg=-fuse-ld=$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 -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="$BASE_CFLAGS -O3 -fPIC -fembed-bitcode -march=sandybridge -mcpu=sandybridge -mtune=sandybridge"
# Rust doesn't recognize CFLAGS changes, so we need to clean build artifacts
cargo clean --release
- CARGO_PROFILE_RELEASE_LTO=true cargo rustc -v --release -- -C linker-plugin-lto -C lto -C linker=$CLANG -C link-arg=-fuse-ld=$LLD
- $CLANGPP $LOCAL_CFLAGS -flto -fuse-ld=lld -O2 demo.cpp target/release/libldk.a -ldl
- strip ./a.out
- echo "C++ Bin size and runtime with cross-language LTO:"
- ls -lha a.out
- time ./a.out > /dev/null
+ CARGO_PROFILE_RELEASE_LTO=true cargo rustc -v --release -- -C linker-plugin-lto -C lto -C linker=$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="$BASE_RUSTFLAGS -C target-cpu=apple-a14" CARGO_PROFILE_RELEASE_LTO=true cargo rustc -v --release --target aarch64-apple-darwin -- -C lto
+ fi
+ echo "WARNING: Building with cross-language LTO is not avilable without clang-$RUSTC_LLVM_V"
fi