_ Git - ldk-c-bindings/blob - genbindings.sh

   1 #!/usr/bin/env bash
   2
   3 set -e
   4 set -x
   5
   6 if [ ! -d "$1/lightning" -o "$2" != "true" -a "$2" != "false" ]; then
   7         echo "USAGE: $0 path-to-rust-lightning allow-std"
   8         echo "allow-std must be either 'true' or 'false' to indicate if we should be built relying on time and pthread support"
   9         exit 1
  10 fi
  11
  12 export LC_ALL=C
  13
  14 # On reasonable systems, we can use realpath here, but OSX is a diva with 20-year-old software.
  15 ORIG_PWD="$(pwd)"
  16 cd "$1"
  17 LIGHTNING_PATH="$(pwd)"
  18 LIGHTNING_GIT="$(git describe --tag --dirty --abbrev=16)"
  19 cd "$ORIG_PWD"
  20
  21 # Generate (and reasonably test) C bindings
  22
  23 # First we set various compiler flags...
  24 HOST_PLATFORM="$(rustc --version --verbose | grep "host:")"
  25
  26 # Set path to include our rustc wrapper as well as cbindgen
  27 export LDK_RUSTC_PATH="$(which rustc)"
  28 PATH="$(pwd)/deterministic-build-wrappers:$PATH:~/.cargo/bin"
  29
  30 # Set up CFLAGS and RUSTFLAGS vars appropriately for building libsecp256k1 and demo apps...
  31 BASE_CFLAGS="" # CFLAGS for libsecp256k1
  32 LOCAL_CFLAGS="" # CFLAGS for demo apps
  33 BASE_RUSTFLAGS="" # RUSTFLAGS
  34
  35 # Remap paths so that our builds are deterministic
  36 BASE_RUSTFLAGS="--remap-path-prefix $LIGHTNING_PATH=rust-lightning --remap-path-prefix $(pwd)=ldk-c-bindings --remap-path-prefix $HOME/.cargo="
  37
  38 # If the C compiler supports it, also set -ffile-prefix-map
  39 echo "int main() {}" > genbindings_path_map_test_file.c
  40 clang -o /dev/null -ffile-prefix-map=$HOME/.cargo= genbindings_path_map_test_file.c > /dev/null 2>&1 &&
  41 export BASE_CFLAGS="-ffile-prefix-map=$HOME/.cargo="
  42
  43 BASE_CFLAGS="$BASE_CFLAGS -frandom-seed=42"
  44 LOCAL_CFLAGS="-Wall -Wno-nullability-completeness -pthread -Iinclude/"
  45
  46 if [ "$HOST_PLATFORM" = "host: x86_64-apple-darwin" ]; then
  47         export MACOSX_DEPLOYMENT_TARGET=10.9
  48         LOCAL_CFLAGS="$LOCAL_CFLAGS -isysroot$(xcrun --show-sdk-path) -mmacosx-version-min=10.9"
  49         BASE_CFLAGS="$BASE_CFLAGS -isysroot$(xcrun --show-sdk-path) -mmacosx-version-min=10.9"
  50         # Targeting aarch64 appears to be supported only starting with Big Sur, so check it before use
  51         clang -o /dev/null $BASE_CFLAGS --target=aarch64-apple-darwin -mcpu=apple-a14 genbindings_path_map_test_file.c &&
  52         export CFLAGS_aarch64_apple_darwin="$BASE_CFLAGS --target=aarch64-apple-darwin -mcpu=apple-a14" ||
  53         echo "WARNING: Can not build targeting aarch64-apple-darin. Upgrade to Big Sur or try upstream clang"
  54 fi
  55
  56 rm genbindings_path_map_test_file.c
  57
  58 ENV_TARGET=$(rustc --version --verbose | grep host | awk '{ print $2 }' | sed 's/-/_/g')
  59 case "$ENV_TARGET" in
  60         "x86_64"*)
  61                 export RUSTFLAGS="$BASE_RUSTFLAGS -C target-cpu=sandybridge"
  62                 export CFLAGS_$ENV_TARGET="$BASE_CFLAGS -march=sandybridge -mcpu=sandybridge -mtune=sandybridge"
  63                 ;;
  64         *)
  65                 # Assume this isn't targeted at another host and build for the host's CPU.
  66                 export RUSTFLAGS="$BASE_RUSTFLAGS -C target-cpu=native"
  67                 export CFLAGS_$ENV_TARGET="$BASE_CFLAGS -mcpu=native"
  68                 ;;
  69 esac
  70
  71 # First build the latest c-bindings-gen binary
  72 cd c-bindings-gen && cargo build --release && cd ..
  73
  74 # Then wipe all the existing C bindings (because we're being run in the right directory)
  75 # note that we keep the few manually-generated files first:
  76 mv lightning-c-bindings/src/c_types/mod.rs ./
  77 mv lightning-c-bindings/src/bitcoin ./
  78
  79 # Before we try to sed the Cargo.toml, generate version define tags
  80 # (ignoring any files that we're about to generate)
  81
  82 git checkout lightning-c-bindings/src
  83 git checkout lightning-c-bindings/include
  84 BINDINGS_GIT="$(git describe --tag --dirty --abbrev=16)"
  85 echo -e "#ifndef _LDK_HEADER_VER" > lightning-c-bindings/include/ldk_ver.h
  86 echo -e "static inline int _ldk_strncmp(const char *s1, const char *s2, uint64_t n) {" >> lightning-c-bindings/include/ldk_ver.h
  87 echo -e "\tif (n && *s1 != *s2) return 1;" >> lightning-c-bindings/include/ldk_ver.h
  88 echo -e "\twhile (n && *s1 != 0 && *s2 != 0) {" >> lightning-c-bindings/include/ldk_ver.h
  89 echo -e "\t\ts1++; s2++; n--;" >> lightning-c-bindings/include/ldk_ver.h
  90 echo -e "\t\tif (n && *s1 != *s2) return 1;" >> lightning-c-bindings/include/ldk_ver.h
  91 echo -e "\t}" >> lightning-c-bindings/include/ldk_ver.h
  92 echo -e "\treturn 0;" >> lightning-c-bindings/include/ldk_ver.h
  93 echo -e "}" >> lightning-c-bindings/include/ldk_ver.h
  94 echo -e "" >> lightning-c-bindings/include/ldk_ver.h
  95 echo -e "#define _LDK_HEADER_VER \"$LIGHTNING_GIT\"" >> lightning-c-bindings/include/ldk_ver.h
  96 echo -e "#define _LDK_C_BINDINGS_HEADER_VER \"$BINDINGS_GIT\"" >> lightning-c-bindings/include/ldk_ver.h
  97 echo -e "static inline const char* check_get_ldk_version() {" >> lightning-c-bindings/include/ldk_ver.h
  98 echo -e "\tLDKStr bin_ver = _ldk_get_compiled_version();" >> lightning-c-bindings/include/ldk_ver.h
  99 echo -e "\tif (_ldk_strncmp(_LDK_HEADER_VER, (const char*)bin_ver.chars, bin_ver.len) != 0) {" >> lightning-c-bindings/include/ldk_ver.h
 100 echo -e "\t// Version mismatch, we don't know what we're running!" >> lightning-c-bindings/include/ldk_ver.h
 101 echo -e "\t\treturn 0;" >> lightning-c-bindings/include/ldk_ver.h
 102 echo -e "\t}" >> lightning-c-bindings/include/ldk_ver.h
 103 echo -e "\treturn _LDK_HEADER_VER;" >> lightning-c-bindings/include/ldk_ver.h
 104 echo -e "}" >> lightning-c-bindings/include/ldk_ver.h
 105 echo -e "static inline const char* check_get_ldk_bindings_version() {" >> lightning-c-bindings/include/ldk_ver.h
 106 echo -e "\tLDKStr bin_ver = _ldk_c_bindings_get_compiled_version();" >> lightning-c-bindings/include/ldk_ver.h
 107 echo -e "\tif (_ldk_strncmp(_LDK_C_BINDINGS_HEADER_VER, (const char*)bin_ver.chars, bin_ver.len) != 0) {" >> lightning-c-bindings/include/ldk_ver.h
 108 echo -e "\t// Version mismatch, we don't know what we're running!" >> lightning-c-bindings/include/ldk_ver.h
 109 echo -e "\t\treturn 0;" >> lightning-c-bindings/include/ldk_ver.h
 110 echo -e "\t}" >> lightning-c-bindings/include/ldk_ver.h
 111 echo -e "\treturn _LDK_C_BINDINGS_HEADER_VER;" >> lightning-c-bindings/include/ldk_ver.h
 112 echo -e "}" >> lightning-c-bindings/include/ldk_ver.h
 113 echo -e "#endif /* _LDK_HEADER_VER */" >> lightning-c-bindings/include/ldk_ver.h
 114
 115 rm -rf lightning-c-bindings/src
 116
 117 mkdir -p lightning-c-bindings/src/{c_types,lightning}
 118 mv ./mod.rs lightning-c-bindings/src/c_types/
 119 mv ./bitcoin lightning-c-bindings/src/
 120
 121 # Finally, run the c-bindings-gen binary, building fresh bindings.
 122 OUT="$(pwd)/lightning-c-bindings/src"
 123 OUT_TEMPL="$(pwd)/lightning-c-bindings/src/c_types/derived.rs"
 124 OUT_F="$(pwd)/lightning-c-bindings/include/ldk_rust_types.h"
 125 OUT_CPP="$(pwd)/lightning-c-bindings/include/lightningpp.hpp"
 126 BIN="$(pwd)/c-bindings-gen/target/release/c-bindings-gen"
 127
 128 function add_crate() {
 129         pushd "$LIGHTNING_PATH/$1"
 130         RUSTC_BOOTSTRAP=1 cargo rustc --profile=check $3 -- -Zunstable-options --pretty=expanded > /tmp/$1-crate-source.txt
 131         popd
 132         if [ "$HOST_PLATFORM" = "host: x86_64-apple-darwin" ]; then
 133                 sed -i".original" "1i\\
 134 pub mod $2 {
 135 " /tmp/$1-crate-source.txt
 136         else
 137                 sed -i "1ipub mod $2 {\n" /tmp/$1-crate-source.txt
 138         fi
 139         echo "}" >> /tmp/$1-crate-source.txt
 140         cat /tmp/$1-crate-source.txt >> /tmp/crate-source.txt
 141         rm /tmp/$1-crate-source.txt
 142         if [ "$HOST_PLATFORM" = "host: x86_64-apple-darwin" ]; then
 143                 # OSX sed is for some reason not compatible with GNU sed
 144                 sed -E -i '' 's|#?'$1' = \{ .*|'$1' = \{ path = "'"$LIGHTNING_PATH"'/'$1'" '"$4"' }|' lightning-c-bindings/Cargo.toml
 145         else
 146                 sed -E -i 's|#?'$1' = \{ .*|'$1' = \{ path = "'"$LIGHTNING_PATH"'/'$1'" '"$4"' }|' lightning-c-bindings/Cargo.toml
 147         fi
 148 }
 149
 150 function drop_crate() {
 151         if [ "$HOST_PLATFORM" = "host: x86_64-apple-darwin" ]; then
 152                 # OSX sed is for some reason not compatible with GNU sed
 153                 sed -E -i '' 's|'$1' = \{ (.*)|#'$1' = \{ \1|' lightning-c-bindings/Cargo.toml
 154         else
 155                 sed -E -i 's|'$1' = \{ (.*)|#'$1' = \{ \1|' lightning-c-bindings/Cargo.toml
 156         fi
 157 }
 158
 159 echo > /tmp/crate-source.txt
 160 if [ "$2" = "true" ]; then
 161         add_crate lightning lightning --features=allow_wallclock_use ', features = ["allow_wallclock_use"]'
 162         add_crate "lightning-persister" "lightning_persister"
 163         add_crate "lightning-background-processor" "lightning_background_processor"
 164 else
 165         add_crate lightning lightning
 166         drop_crate "lightning-persister"
 167         drop_crate "lightning-background-processor"
 168 fi
 169 add_crate "lightning-invoice" "lightning_invoice"
 170
 171 cat /tmp/crate-source.txt | RUST_BACKTRACE=1 "$BIN" "$OUT/" "$OUT_TEMPL" "$OUT_F" "$OUT_CPP"
 172
 173 echo -e '#[no_mangle]' >> lightning-c-bindings/src/version.rs
 174 echo -e 'pub extern "C" fn _ldk_get_compiled_version() -> crate::c_types::Str {' >> lightning-c-bindings/src/version.rs
 175 echo -e '\t"'"$LIGHTNING_GIT"'".into()' >> lightning-c-bindings/src/version.rs
 176 echo -e '}' >> lightning-c-bindings/src/version.rs
 177 echo -e '#[no_mangle]' >> lightning-c-bindings/src/version.rs
 178 echo -e 'pub extern "C" fn _ldk_c_bindings_get_compiled_version() -> crate::c_types::Str {' >> lightning-c-bindings/src/version.rs
 179 echo -e '\t"'"$BINDINGS_GIT"'".into()' >> lightning-c-bindings/src/version.rs
 180 echo -e '}' >> lightning-c-bindings/src/version.rs
 181
 182 # Now cd to lightning-c-bindings, build the generated bindings, and call cbindgen to build a C header file
 183 cd lightning-c-bindings
 184
 185 cargo build
 186 if [ "$CFLAGS_aarch64_apple_darwin" != "" ]; then
 187         RUSTFLAGS="$BASE_RUSTFLAGS -C target-cpu=apple-a14" cargo build --target aarch64-apple-darwin
 188 fi
 189 cbindgen -v --config cbindgen.toml -o include/lightning.h >/dev/null 2>&1
 190
 191 # cbindgen is relatively braindead when exporting typedefs -
 192 # it happily exports all our typedefs for private types, even with the
 193 # generics we specified in C mode! So we drop all those types manually here.
 194 if [ "$HOST_PLATFORM" = "host: x86_64-apple-darwin" ]; then
 195         # OSX sed is for some reason not compatible with GNU sed
 196         sed -i '' 's/typedef LDKnative.*Import.*LDKnative.*;//g' include/lightning.h
 197
 198         # stdlib.h doesn't exist in clang's wasm sysroot, and cbindgen
 199         # doesn't actually use it anyway, so drop the import.
 200         sed -i '' 's/#include <stdlib.h>/#include <ldk_rust_types.h>/g' include/lightning.h
 201 else
 202         sed -i 's/typedef LDKnative.*Import.*LDKnative.*;//g' include/lightning.h
 203
 204         # stdlib.h doesn't exist in clang's wasm sysroot, and cbindgen
 205         # doesn't actually use it anyway, so drop the import.
 206         sed -i 's/#include <stdlib.h>/#include <ldk_rust_types.h>/g' include/lightning.h
 207 fi
 208
 209 # Finally, sanity-check the generated C and C++ bindings with demo apps:
 210 # Naively run the C demo app:
 211 gcc $LOCAL_CFLAGS -Wall -g -pthread demo.c target/debug/libldk.a -ldl
 212 ./a.out
 213
 214 # And run the C++ demo app
 215 g++ $LOCAL_CFLAGS -std=c++11 -Wall -g -pthread demo.cpp -Ltarget/debug/ -lldk -ldl
 216 LD_LIBRARY_PATH=target/debug/ ./a.out > /dev/null
 217
 218 # Finally, run the C++ demo app with our native networking library
 219 # in valgrind to test memory model correctness and lack of leaks.
 220 gcc $LOCAL_CFLAGS -std=c99 -Wall -g -pthread -I../ldk-net ../ldk-net/ldk_net.c -c -o ldk_net.o
 221 g++ $LOCAL_CFLAGS -std=c++11 -Wall -g -pthread -DREAL_NET -I../ldk-net ldk_net.o demo.cpp target/debug/libldk.a -ldl
 222 if [ -x "`which valgrind`" ]; then
 223         valgrind --error-exitcode=4 --memcheck:leak-check=full --show-leak-kinds=all ./a.out
 224         echo
 225 else
 226         echo "WARNING: Please install valgrind for more testing"
 227         ./a.out
 228 fi
 229
 230
 231 # Test a statically-linked C++ version, tracking the resulting binary size and runtime
 232 # across debug, LTO, and cross-language LTO builds (using the same compiler each time).
 233 clang++ $LOCAL_CFLAGS -std=c++11 demo.cpp target/debug/libldk.a -ldl
 234 strip ./a.out
 235 echo " C++ Bin size and runtime w/o optimization:"
 236 ls -lha a.out
 237 time ./a.out > /dev/null
 238
 239 # Then, check with memory sanitizer, if we're on Linux and have rustc nightly
 240 if [ "$HOST_PLATFORM" = "host: x86_64-unknown-linux-gnu" ]; then
 241         if cargo +nightly --version >/dev/null 2>&1; then
 242                 LLVM_V=$(rustc +nightly --version --verbose | grep "LLVM version" | awk '{ print substr($3, 0, 2); }')
 243                 if [ -x "$(which clang-$LLVM_V)" ]; then
 244                         cargo +nightly clean
 245                         cargo +nightly rustc -Zbuild-std=std,panic_abort --target x86_64-unknown-linux-gnu -v -- -Zsanitizer=memory -Zsanitizer-memory-track-origins -Cforce-frame-pointers=yes
 246                         mv target/x86_64-unknown-linux-gnu/debug/libldk.* target/debug/
 247
 248                         # Sadly, std doesn't seem to compile into something that is memsan-safe as of Aug 2020,
 249                         # so we'll always fail, not to mention we may be linking against git rustc LLVM which
 250                         # may differ from clang-llvm, so just allow everything here to fail.
 251                         set +e
 252
 253                         # First the C demo app...
 254                         clang-$LLVM_V $LOCAL_CFLAGS -fsanitize=memory -fsanitize-memory-track-origins -g demo.c target/debug/libldk.a -ldl
 255                         ./a.out
 256
 257                         # ...then the C++ demo app
 258                         clang++-$LLVM_V $LOCAL_CFLAGS -std=c++11 -fsanitize=memory -fsanitize-memory-track-origins -g demo.cpp target/debug/libldk.a -ldl
 259                         ./a.out >/dev/null
 260
 261                         # ...then the C++ demo app with the ldk_net network implementation
 262                         clang-$LLVM_V $LOCAL_CFLAGS -std=c99 -fsanitize=memory -fsanitize-memory-track-origins -g -I../ldk-net ../ldk-net/ldk_net.c -c -o ldk_net.o
 263                         clang++-$LLVM_V $LOCAL_CFLAGS -std=c++11 -fsanitize=memory -fsanitize-memory-track-origins -g -DREAL_NET -I../ldk-net ldk_net.o demo.cpp target/debug/libldk.a -ldl
 264                         ./a.out >/dev/null
 265
 266                         # restore exit-on-failure
 267                         set -e
 268                 else
 269                         echo "WARNING: Can't use memory sanitizer without clang-$LLVM_V"
 270                 fi
 271         else
 272                 echo "WARNING: Can't use memory sanitizer without rustc nightly"
 273         fi
 274 else
 275         echo "WARNING: Can't use memory sanitizer on non-Linux, non-x86 platforms"
 276 fi
 277
 278 RUSTC_LLVM_V=$(rustc --version --verbose | grep "LLVM version" | awk '{ print substr($3, 0, 4); }')
 279
 280 if [ "$HOST_PLATFORM" = "host: x86_64-apple-darwin" ]; then
 281         # Apple is special, as always, and their versions of clang aren't
 282         # compatible with upstream LLVM.
 283         if [ "$(clang --version | grep 'Apple clang')" != "" ]; then
 284                 echo "Apple clang isn't compatible with upstream clang, install upstream clang"
 285                 CLANG_LLVM_V="0"
 286         else
 287                 CLANG_LLVM_V=$(clang --version | head -n1 | awk '{ print substr($4, 0, 4); }')
 288                 if [ -x "$(which ld64.lld)" ]; then
 289                         LLD_LLVM_V="$(ld64.lld --version | awk '{ print substr($2, 0, 4); }')"
 290                 fi
 291         fi
 292 else
 293         CLANG_LLVM_V=$(clang --version | head -n1 | awk '{ print substr($4, 0, 4); }')
 294         if [ -x "$(which ld.lld)" ]; then
 295                 LLD_LLVM_V="$(ld.lld --version | awk '{ print substr($2, 0, 4); }')"
 296         fi
 297 fi
 298
 299
 300 if [ "$CLANG_LLVM_V" = "$RUSTC_LLVM_V" ]; then
 301         CLANG=clang
 302         CLANGPP=clang++
 303         if [ "$LLD_LLVM_V" = "$CLANG_LLVM_V" ]; then
 304                 LLD=lld
 305         fi
 306 elif [ -x "$(which clang-$RUSTC_LLVM_V)" ]; then
 307         CLANG="$(which clang-$RUSTC_LLVM_V)"
 308         CLANGPP="$(which clang++-$RUSTC_LLVM_V || echo clang++)"
 309         if [ "$($CLANG --version)" != "$($CLANGPP --version)" ]; then
 310                 echo "$CLANG and $CLANGPP are not the same version of clang!"
 311                 unset CLANG
 312                 unset CLANGPP
 313         fi
 314         if [ "$LLD_LLVM_V" != "$RUSTC_LLVM_V" ]; then
 315                 LLD="$(which lld-$RUSTC_LLVM_V || echo lld)"
 316                 LLD_LLVM_V="$(ld.$LLD --version | awk '{ print substr($2, 0, 4); }')"
 317                 if [ "$LLD_LLVM_V" != "$RUSTC_LLVM_V" ]; then
 318                         echo "Could not find a workable version of lld, not using cross-language LTO"
 319                         unset LLD
 320                 fi
 321         fi
 322 fi
 323
 324 if [ "$CLANG" != "" -a "$CLANGPP" = "" ]; then
 325         echo "WARNING: It appears you have a clang-$RUSTC_LLVM_V but not clang++-$RUSTC_LLVM_V. This is common, but leaves us unable to compile C++ with LLVM $RUSTC_LLVM_V"
 326         echo "You should create a symlink called clang++-$RUSTC_LLVM_V pointing to $CLANG in $(dirname $CLANG)"
 327 fi
 328
 329 # Finally, if we're on OSX or on Linux, build the final debug binary with address sanitizer (and leave it there)
 330 if [ "$HOST_PLATFORM" = "host: x86_64-unknown-linux-gnu" -o "$HOST_PLATFORM" = "host: x86_64-apple-darwin" ]; then
 331         if [ "$CLANGPP" != "" ]; then
 332                 if [ "$HOST_PLATFORM" = "host: x86_64-apple-darwin" ]; then
 333                         # OSX sed is for some reason not compatible with GNU sed
 334                         sed -i .bk 's/,"cdylib"]/]/g' Cargo.toml
 335                 else
 336                         sed -i.bk 's/,"cdylib"]/]/g' Cargo.toml
 337                 fi
 338                 if [ "$CFLAGS_aarch64_apple_darwin" != "" ]; then
 339                         RUSTFLAGS="$BASE_RUSTFLAGS -C target-cpu=apple-a14" RUSTC_BOOTSTRAP=1 cargo rustc --target aarch64-apple-darwin -v -- -Zsanitizer=address -Cforce-frame-pointers=yes || ( mv Cargo.toml.bk Cargo.toml; exit 1)
 340                 fi
 341                 RUSTC_BOOTSTRAP=1 cargo rustc -v -- -Zsanitizer=address -Cforce-frame-pointers=yes || ( mv Cargo.toml.bk Cargo.toml; exit 1)
 342                 mv Cargo.toml.bk Cargo.toml
 343
 344                 # First the C demo app...
 345                 $CLANG $LOCAL_CFLAGS -fsanitize=address -g demo.c target/debug/libldk.a -ldl
 346                 ASAN_OPTIONS='detect_leaks=1 detect_invalid_pointer_pairs=1 detect_stack_use_after_return=1' ./a.out
 347
 348                 # ...then the C++ demo app
 349                 $CLANGPP $LOCAL_CFLAGS -std=c++11 -fsanitize=address -g demo.cpp target/debug/libldk.a -ldl
 350                 ASAN_OPTIONS='detect_leaks=1 detect_invalid_pointer_pairs=1 detect_stack_use_after_return=1' ./a.out >/dev/null
 351
 352                 # ...then the C++ demo app with the ldk_net network implementation
 353                 $CLANG $LOCAL_CFLAGS -fsanitize=address -g -I../ldk-net ../ldk-net/ldk_net.c -c -o ldk_net.o
 354                 $CLANGPP $LOCAL_CFLAGS -std=c++11 -fsanitize=address -g -DREAL_NET -I../ldk-net ldk_net.o demo.cpp target/debug/libldk.a -ldl
 355                 ASAN_OPTIONS='detect_leaks=1 detect_invalid_pointer_pairs=1 detect_stack_use_after_return=1' ./a.out >/dev/null
 356         else
 357                 echo "WARNING: Please install clang-$RUSTC_LLVM_V and clang++-$RUSTC_LLVM_V to build with address sanitizer"
 358         fi
 359 else
 360         echo "WARNING: Can't use address sanitizer on non-Linux, non-OSX non-x86 platforms"
 361 fi
 362
 363 # Now build with LTO on on both C++ and rust, but without cross-language LTO:
 364 # Clear stale release build artifacts from previous runs
 365 cargo clean --release
 366 CARGO_PROFILE_RELEASE_LTO=true cargo rustc -v --release -- -C lto
 367 clang++ $LOCAL_CFLAGS -std=c++11 -O2 demo.cpp target/release/libldk.a -ldl
 368
 369 strip ./a.out
 370 echo "C++ Bin size and runtime with only RL (LTO) optimized:"
 371 ls -lha a.out
 372 time ./a.out > /dev/null
 373
 374 if [ "$HOST_PLATFORM" != "host: x86_64-apple-darwin" -a "$CLANGPP" != "" ]; then
 375         # If we can use cross-language LTO, use it for building C dependencies (i.e. libsecp256k1) as well
 376         export CC="$CLANG"
 377         # The cc-rs crate tries to force -fdata-sections and -ffunction-sections on, which
 378         # breaks -fembed-bitcode, so we turn off cc-rs' default flags and specify exactly
 379         # what we want here.
 380         export CFLAGS_$ENV_TARGET="$BASE_CFLAGS -fPIC -fembed-bitcode -march=sandybridge"
 381         export CRATE_CC_NO_DEFAULTS=true
 382 fi
 383
 384 if [ "$2" = "false" -a "$(rustc --print target-list | grep wasm32-wasi)" != "" ]; then
 385         # Test to see if clang supports wasm32 as a target (which is needed to build rust-secp256k1)
 386         echo "int main() {}" > genbindings_wasm_test_file.c
 387         if clang -nostdlib -o /dev/null --target=wasm32-wasi -Wl,--no-entry genbindings_wasm_test_file.c > /dev/null 2>&1; then
 388                 # And if it does, build a WASM binary without capturing errors
 389                 export CFLAGS_wasm32_wasi="$BASE_CFLAGS -target wasm32"
 390                 cargo rustc -v --target=wasm32-wasi
 391                 export CFLAGS_wasm32_wasi="$BASE_CFLAGS -target wasm32 -Os"
 392                 CARGO_PROFILE_RELEASE_LTO=true cargo rustc -v --release --target=wasm32-wasi -- -C embed-bitcode=yes -C opt-level=s -C linker-plugin-lto -C lto
 393         else
 394                 echo "Cannot build WASM lib as clang does not seem to support the wasm32-wasi target"
 395         fi
 396         rm genbindings_wasm_test_file.c
 397 fi
 398
 399 if [ "$CFLAGS_aarch64_apple_darwin" != "" ]; then
 400         RUSTFLAGS="$BASE_RUSTFLAGS -C target-cpu=apple-a14" CARGO_PROFILE_RELEASE_LTO=true cargo rustc -v --release --target aarch64-apple-darwin -- -C lto
 401 fi
 402
 403 if [ "$HOST_PLATFORM" != "host: x86_64-apple-darwin" -a "$CLANGPP" != "" -a "$LLD" != "" ]; then
 404         # Finally, test cross-language LTO. Note that this will fail if rustc and clang++
 405         # build against different versions of LLVM (eg when rustc is installed via rustup
 406         # or Ubuntu packages). This should work fine on Distros which do more involved
 407         # packaging than simply shipping the rustup binaries (eg Debian should Just Work
 408         # here).
 409         export CFLAGS_$ENV_TARGET="$BASE_CFLAGS -O3 -fPIC -fembed-bitcode -march=sandybridge"
 410         # Rust doesn't recognize CFLAGS changes, so we need to clean build artifacts
 411         cargo clean --release
 412         CARGO_PROFILE_RELEASE_LTO=true cargo rustc -v --release -- -C linker-plugin-lto -C lto -C linker=$CLANG -C link-arg=-fuse-ld=$LLD
 413         $CLANGPP $LOCAL_CFLAGS -flto -fuse-ld=lld -O2 demo.cpp target/release/libldk.a -ldl
 414         strip ./a.out
 415         echo "C++ Bin size and runtime with cross-language LTO:"
 416         ls -lha a.out
 417         time ./a.out > /dev/null
 418 else
 419         echo "WARNING: Building with cross-language LTO is not avilable on OSX or without clang-$RUSTC_LLVM_V"
 420 fi