_ 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 export RUSTC="$(pwd)/deterministic-build-wrappers/rustc"
  29 PATH="$PATH:~/.cargo/bin"
  30
  31 # Set up CFLAGS and RUSTFLAGS vars appropriately for building libsecp256k1 and demo apps...
  32 BASE_CFLAGS="" # CFLAGS for libsecp256k1
  33 LOCAL_CFLAGS="" # CFLAGS for demo apps
  34
  35 # Remap paths so that our builds are deterministic
  36 BASE_RUSTFLAGS="--cfg=c_bindings --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 HOST_OSX=false
  47 if [ "$HOST_PLATFORM" = "host: x86_64-apple-darwin" ]; then
  48         HOST_OSX=true
  49 elif [ "$HOST_PLATFORM" = "host: aarch64-apple-darwin" ]; then
  50         HOST_OSX=true
  51 fi
  52
  53 BASE_HOST_CFLAGS="$BASE_CFLAGS"
  54
  55 if [ "$HOST_OSX" = "true" ]; then
  56         export MACOSX_DEPLOYMENT_TARGET=10.9
  57         LOCAL_CFLAGS="$LOCAL_CFLAGS -isysroot$(xcrun --show-sdk-path) -mmacosx-version-min=10.9"
  58         BASE_HOST_CFLAGS="$BASE_HOST_CFLAGS -isysroot$(xcrun --show-sdk-path) -mmacosx-version-min=10.9"
  59         # Targeting aarch64 appears to be supported only starting with Big Sur, so check it before use
  60         clang -o /dev/null $BASE_HOST_CFLAGS --target=aarch64-apple-darwin -mcpu=apple-a14 genbindings_path_map_test_file.c &&
  61         export CFLAGS_aarch64_apple_darwin="$BASE_HOST_CFLAGS --target=aarch64-apple-darwin -mcpu=apple-a14" ||
  62         echo "WARNING: Can not build targeting aarch64-apple-darin. Upgrade to Big Sur or try upstream clang"
  63 fi
  64
  65 rm genbindings_path_map_test_file.c
  66
  67 ENV_TARGET=$(rustc --version --verbose | grep host | awk '{ print $2 }' | sed 's/-/_/g')
  68 case "$ENV_TARGET" in
  69         "x86_64"*)
  70                 export RUSTFLAGS="$BASE_RUSTFLAGS -C target-cpu=sandybridge"
  71                 export CFLAGS_$ENV_TARGET="$BASE_HOST_CFLAGS -march=sandybridge -mcpu=sandybridge -mtune=sandybridge"
  72                 ;;
  73         *)
  74                 # Assume this isn't targeted at another host and build for the host's CPU.
  75                 export RUSTFLAGS="$BASE_RUSTFLAGS -C target-cpu=native"
  76                 export CFLAGS_$ENV_TARGET="$BASE_HOST_CFLAGS -mcpu=native"
  77                 ;;
  78 esac
  79
  80 # First build the latest c-bindings-gen binary
  81 cd c-bindings-gen && cargo build --release && cd ..
  82
  83 # Then wipe all the existing C bindings (because we're being run in the right directory)
  84 # note that we keep the few manually-generated files first:
  85 mv lightning-c-bindings/src/c_types/mod.rs ./
  86 mv lightning-c-bindings/src/bitcoin ./
  87
  88 # Before we try to sed the Cargo.toml, generate version define tags
  89 # (ignoring any files that we're about to generate)
  90
  91 git checkout lightning-c-bindings/src
  92 git checkout lightning-c-bindings/include
  93 BINDINGS_GIT="$(git describe --tag --dirty --abbrev=16)"
  94 echo "$(cat <<EOF
  95 #ifndef _LDK_HEADER_VER
  96 static inline int _ldk_strncmp(const char *s1, const char *s2, uint64_t n) {
  97         if (n && *s1 != *s2) return 1;
  98         while (n && *s1 != 0 && *s2 != 0) {
  99                 s1++; s2++; n--;
 100                 if (n && *s1 != *s2) return 1;
 101         }
 102         return 0;
 103 }
 104
 105 #define _LDK_HEADER_VER "${LIGHTNING_GIT}"
 106 #define _LDK_C_BINDINGS_HEADER_VER "${BINDINGS_GIT}"
 107 static inline const char* check_get_ldk_version() {
 108         LDKStr bin_ver = _ldk_get_compiled_version();
 109         if (_ldk_strncmp(_LDK_HEADER_VER, (const char*)bin_ver.chars, bin_ver.len) != 0) {
 110         // Version mismatch, we don't know what we're running!
 111                 return 0;
 112         }
 113         return _LDK_HEADER_VER;
 114 }
 115 static inline const char* check_get_ldk_bindings_version() {
 116         LDKStr bin_ver = _ldk_c_bindings_get_compiled_version();
 117         if (_ldk_strncmp(_LDK_C_BINDINGS_HEADER_VER, (const char*)bin_ver.chars, bin_ver.len) != 0) {
 118         // Version mismatch, we don't know what we're running!
 119                 return 0;
 120         }
 121         return _LDK_C_BINDINGS_HEADER_VER;
 122 }
 123 #endif /* _LDK_HEADER_VER */
 124 EOF
 125 )" > lightning-c-bindings/include/ldk_ver.h
 126
 127 rm -rf lightning-c-bindings/src
 128
 129 mkdir -p lightning-c-bindings/src/{c_types,lightning}
 130 mv ./mod.rs lightning-c-bindings/src/c_types/
 131 mv ./bitcoin lightning-c-bindings/src/
 132
 133 # Finally, run the c-bindings-gen binary, building fresh bindings.
 134 OUT="$(pwd)/lightning-c-bindings/src"
 135 OUT_TEMPL="$(pwd)/lightning-c-bindings/src/c_types/derived.rs"
 136 OUT_F="$(pwd)/lightning-c-bindings/include/ldk_rust_types.h"
 137 OUT_CPP="$(pwd)/lightning-c-bindings/include/lightningpp.hpp"
 138 BIN="$(pwd)/c-bindings-gen/target/release/c-bindings-gen"
 139
 140 function add_crate() {
 141         pushd "$LIGHTNING_PATH/$1"
 142         RUSTC_BOOTSTRAP=1 cargo rustc --profile=check --no-default-features $3 -- --cfg=c_bindings -Zunpretty=expanded > /tmp/$1-crate-source.txt
 143         popd
 144         if [ "$HOST_OSX" = "true" ]; then
 145                 sed -i".original" "1i\\
 146 pub mod $2 {
 147 " /tmp/$1-crate-source.txt
 148         else
 149                 sed -i "1ipub mod $2 {\n" /tmp/$1-crate-source.txt
 150         fi
 151         echo "}" >> /tmp/$1-crate-source.txt
 152         cat /tmp/$1-crate-source.txt >> /tmp/crate-source.txt
 153         rm /tmp/$1-crate-source.txt
 154         if [ "$HOST_OSX" = "true" ]; then
 155                 # OSX sed is for some reason not compatible with GNU sed
 156                 sed -E -i '' 's|#*'$1' = \{ .*|'$1' = \{ path = "'"$LIGHTNING_PATH"'/'$1'", default-features = false }|' lightning-c-bindings/Cargo.toml
 157         else
 158                 sed -E -i 's|#*'$1' = \{ .*|'$1' = \{ path = "'"$LIGHTNING_PATH"'/'$1'", default-features = false }|' lightning-c-bindings/Cargo.toml
 159         fi
 160 }
 161
 162 function drop_crate() {
 163         if [ "$HOST_OSX" = "true" ]; then
 164                 # OSX sed is for some reason not compatible with GNU sed
 165                 sed -E -i '' 's|'$1' = \{ (.*)|#'$1' = \{ \1|' lightning-c-bindings/Cargo.toml
 166         else
 167                 sed -E -i 's|'$1' = \{ (.*)|#'$1' = \{ \1|' lightning-c-bindings/Cargo.toml
 168         fi
 169 }
 170
 171 echo > /tmp/crate-source.txt
 172 if [ "$2" = "true" ]; then
 173         add_crate lightning lightning --features=std
 174         add_crate "lightning-persister" "lightning_persister"
 175         add_crate "lightning-background-processor" "lightning_background_processor"
 176         add_crate "lightning-invoice" "lightning_invoice" --features=std
 177         CARGO_BUILD_ARGS="--features=std"
 178 else
 179         add_crate lightning lightning --features=no-std
 180         drop_crate "lightning-persister"
 181         drop_crate "lightning-background-processor"
 182         add_crate "lightning-invoice" "lightning_invoice" --features=no-std
 183         CARGO_BUILD_ARGS="--features=no-std"
 184 fi
 185
 186 cat /tmp/crate-source.txt | RUST_BACKTRACE=1 "$BIN" "$OUT/" "$OUT_TEMPL" "$OUT_F" "$OUT_CPP"
 187
 188 echo "$(cat <<EOF
 189 #[no_mangle]
 190 pub extern "C" fn _ldk_get_compiled_version() -> crate::c_types::Str {
 191         "${LIGHTNING_GIT}".into()
 192 }
 193 #[no_mangle]
 194 pub extern "C" fn _ldk_c_bindings_get_compiled_version() -> crate::c_types::Str {
 195         "${BINDINGS_GIT}".into()
 196 }
 197 EOF
 198 )" >> lightning-c-bindings/src/version.rs
 199
 200 # Now cd to lightning-c-bindings, build the generated bindings, and call cbindgen to build a C header file
 201 cd lightning-c-bindings
 202
 203 RUSTFLAGS="$RUSTFLAGS --cfg=test_mod_pointers" cargo build $CARGO_BUILD_ARGS
 204 if [ "$CFLAGS_aarch64_apple_darwin" != "" ]; then
 205         RUSTFLAGS="$BASE_RUSTFLAGS -C target-cpu=apple-a14" cargo build $CARGO_BUILD_ARGS --target aarch64-apple-darwin
 206 fi
 207 cbindgen -v --config cbindgen.toml -o include/lightning.h >/dev/null 2>&1
 208
 209 # cbindgen is relatively braindead when exporting typedefs -
 210 # it happily exports all our typedefs for private types, even with the
 211 # generics we specified in C mode! So we drop all those types manually here.
 212 if [ "$HOST_OSX" = "true" ]; then
 213         # OSX sed is for some reason not compatible with GNU sed
 214         sed -i '' 's/typedef LDKnative.*Import.*LDKnative.*;//g' include/lightning.h
 215
 216         # stdlib.h doesn't exist in clang's wasm sysroot, and cbindgen
 217         # doesn't actually use it anyway, so drop the import.
 218         sed -i '' 's/#include <stdlib.h>/#include "ldk_rust_types.h"/g' include/lightning.h
 219 else
 220         sed -i 's/typedef LDKnative.*Import.*LDKnative.*;//g' include/lightning.h
 221
 222         # stdlib.h doesn't exist in clang's wasm sysroot, and cbindgen
 223         # doesn't actually use it anyway, so drop the import.
 224         sed -i 's/#include <stdlib.h>/#include "ldk_rust_types.h"/g' include/lightning.h
 225 fi
 226
 227 # Build C++ class methods which call trait methods
 228 set +x # Echoing every command is very verbose here
 229 OLD_IFS="$IFS"
 230 export IFS=''
 231 echo '#include <string.h>' > include/lightningpp_new.hpp
 232 echo 'namespace LDK {' >> include/lightningpp_new.hpp
 233 echo '// Forward declarations' >> include/lightningpp_new.hpp
 234 cat include/lightningpp.hpp | sed -n 's/class \(.*\) {/class \1;/p' >> include/lightningpp_new.hpp
 235 echo '' >> include/lightningpp_new.hpp
 236
 237 DECLS=""
 238 while read LINE; do
 239         case "$LINE" in
 240                 "#include <string.h>")
 241                         # We already printed this above.
 242                         ;;
 243                 "namespace LDK {")
 244                         # We already printed this above.
 245                         ;;
 246                 "}")
 247                         # We'll print this at the end
 248                         ;;
 249                 "XXX"*)
 250                         NEW_STRUCT_NAME="$(echo "$LINE" | awk '{ print $2 }')"
 251                         if [ "$NEW_STRUCT_NAME" != "$STRUCT_NAME" ]; then
 252                                 STRUCT_CONTENTS="$(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 "}")"
 253                         fi
 254                         STRUCT_NAME="$NEW_STRUCT_NAME"
 255                         METHOD_NAME="$(echo "$LINE" | awk '{ print $3 }')"
 256                         METHOD="$(echo "$STRUCT_CONTENTS" | grep "(\*$METHOD_NAME)")"
 257                         if [ "$METHOD" = "" ]; then
 258                                 echo "Unable to find method declaration for $LINE"
 259                                 exit 1
 260                         fi
 261                         RETVAL="$(echo "$METHOD" | sed 's/[ ]*\([A-Za-z0-9 _]*\)(\*\(.*\)).*/\1/' | sed 's/^struct LDK/LDK::/g' | tr -d ' ')"
 262                         [ "$RETVAL" = "LDK::SecretKey" ] && RETVAL="LDKSecretKey"
 263                         [ "$RETVAL" = "LDK::PublicKey" ] && RETVAL="LDKPublicKey"
 264                         [ "$RETVAL" = "LDK::ThirtyTwoBytes" ] && RETVAL="LDKThirtyTwoBytes"
 265                         PARAMS="$(echo "$METHOD" | sed 's/.*(\*.*)(\(const \)*void \*this_arg\(, \)*\(.*\));/\3/')"
 266
 267                         echo -e "\tinline $RETVAL $METHOD_NAME($PARAMS);" >> include/lightningpp_new.hpp
 268                         DECLS="$DECLS"$'\n'"inline $RETVAL $STRUCT_NAME::$METHOD_NAME($PARAMS) {"
 269
 270                         DECLS="$DECLS"$'\n'$'\t'
 271                         [ "$RETVAL" != "void" ] && DECLS="$DECLS$RETVAL ret = "
 272                         DECLS="$DECLS(self.$METHOD_NAME)(self.this_arg"
 273
 274                         IFS=','; for PARAM in $PARAMS; do
 275                                 DECLS="$DECLS, "
 276                                 DECLS="$DECLS$(echo $PARAM | sed 's/.* (*\**\([a-zA-Z0-9_]*\)\()[\[0-9\]*]\)*/\1/')"
 277                         done
 278                         IFS=''
 279
 280                         DECLS="$DECLS);"
 281                         [ "$RETVAL" != "void" ] && DECLS="$DECLS"$'\n'$'\t'"return ret;"
 282                         DECLS="$DECLS"$'\n'"}"
 283                         ;;
 284                 *)
 285                         echo "$LINE" >> include/lightningpp_new.hpp
 286         esac
 287 done < include/lightningpp.hpp
 288 echo "$DECLS" >> include/lightningpp_new.hpp
 289 echo "}" >> include/lightningpp_new.hpp
 290 export IFS="$OLD_IFS"
 291 set -x
 292 mv include/lightningpp_new.hpp include/lightningpp.hpp
 293
 294 # Finally, sanity-check the generated C and C++ bindings with demo apps:
 295 # Naively run the C demo app:
 296 gcc $LOCAL_CFLAGS -Wall -g -pthread demo.c target/debug/libldk.a -ldl -lm
 297 ./a.out
 298
 299 # And run the C++ demo app
 300 if [ "$2" = "true" ]; then
 301         g++ $LOCAL_CFLAGS -std=c++11 -Wall -g -pthread demo.cpp -Ltarget/debug/ -lldk -ldl
 302         LD_LIBRARY_PATH=target/debug/ ./a.out > /dev/null
 303 fi
 304
 305 # Finally, run the C++ demo app with our native networking library
 306 # in valgrind to test memory model correctness and lack of leaks.
 307 gcc $LOCAL_CFLAGS -fPIC -std=c99 -Wall -g -pthread -I../ldk-net ../ldk-net/ldk_net.c -c -o ldk_net.o
 308 if [ "$2" = "true" ]; then
 309         g++ $LOCAL_CFLAGS -std=c++11 -Wall -g -pthread -DREAL_NET -I../ldk-net ldk_net.o demo.cpp target/debug/libldk.a -ldl -lm
 310         if [ -x "`which valgrind`" -a "$(uname -m)" != "ppc64le" ]; then
 311                 valgrind --error-exitcode=4 --memcheck:leak-check=full --show-leak-kinds=all ./a.out
 312                 echo
 313         else
 314                 echo "WARNING: Please install valgrind for more testing"
 315                 ./a.out
 316         fi
 317 fi
 318
 319
 320 # Test a statically-linked C++ version, tracking the resulting binary size and runtime
 321 # across debug, LTO, and cross-language LTO builds (using the same compiler each time).
 322 if [ "$2" = "true" ]; then
 323         clang++ $LOCAL_CFLAGS -std=c++11 demo.cpp target/debug/libldk.a -ldl
 324         strip ./a.out
 325         echo " C++ Bin size and runtime w/o optimization:"
 326         ls -lha a.out
 327         time ./a.out > /dev/null
 328 fi
 329
 330 # Then, check with memory sanitizer, if we're on Linux and have rustc nightly
 331 if [ "$HOST_PLATFORM" = "host: x86_64-unknown-linux-gnu" ]; then
 332         if cargo +nightly --version >/dev/null 2>&1; then
 333                 LLVM_V=$(rustc +nightly --version --verbose | grep "LLVM version" | awk '{ print substr($3, 0, 2); }')
 334                 if [ -x "$(which clang-$LLVM_V)" ]; then
 335                         cargo +nightly clean
 336                         cargo +nightly rustc $CARGO_BUILD_ARGS -Zbuild-std=std,panic_abort --target x86_64-unknown-linux-gnu -v -- -Zsanitizer=memory -Zsanitizer-memory-track-origins -Cforce-frame-pointers=yes
 337                         mv target/x86_64-unknown-linux-gnu/debug/libldk.* target/debug/
 338
 339                         # Sadly, std doesn't seem to compile into something that is memsan-safe as of Aug 2020,
 340                         # so we'll always fail, not to mention we may be linking against git rustc LLVM which
 341                         # may differ from clang-llvm, so just allow everything here to fail.
 342                         set +e
 343
 344                         # First the C demo app...
 345                         clang-$LLVM_V $LOCAL_CFLAGS -fsanitize=memory -fsanitize-memory-track-origins -g demo.c target/debug/libldk.a -ldl
 346                         ./a.out
 347
 348                         if [ "$2" = "true" ]; then
 349                                 # ...then the C++ demo app
 350                                 clang++-$LLVM_V $LOCAL_CFLAGS -std=c++11 -fsanitize=memory -fsanitize-memory-track-origins -g demo.cpp target/debug/libldk.a -ldl
 351                                 ./a.out >/dev/null
 352
 353                                 # ...then the C++ demo app with the ldk_net network implementation
 354                                 clang-$LLVM_V $LOCAL_CFLAGS -std=c99 -fsanitize=memory -fsanitize-memory-track-origins -g -I../ldk-net ../ldk-net/ldk_net.c -c -o ldk_net.o
 355                                 clang++-$LLVM_V $LOCAL_CFLAGS -std=c++11 -fsanitize=memory -fsanitize-memory-track-origins -g -DREAL_NET -I../ldk-net ldk_net.o demo.cpp target/debug/libldk.a -ldl
 356                                 ./a.out >/dev/null
 357                         fi
 358
 359                         # restore exit-on-failure
 360                         set -e
 361                 else
 362                         echo "WARNING: Can't use memory sanitizer without clang-$LLVM_V"
 363                 fi
 364         else
 365                 echo "WARNING: Can't use memory sanitizer without rustc nightly"
 366         fi
 367 else
 368         echo "WARNING: Can't use memory sanitizer on non-Linux, non-x86 platforms"
 369 fi
 370
 371 RUSTC_LLVM_V=$(rustc --version --verbose | grep "LLVM version" | awk '{ print substr($3, 0, 2); }')
 372
 373 if [ "$HOST_OSX" = "true" ]; then
 374         # Apple is special, as always, and their versions of clang aren't
 375         # compatible with upstream LLVM.
 376         if [ "$(clang --version | grep 'Apple clang')" != "" ]; then
 377                 echo "Apple clang isn't compatible with upstream clang, install upstream clang"
 378                 CLANG_LLVM_V="0"
 379         else
 380                 CLANG_LLVM_V=$(clang --version | head -n1 | awk '{ print substr($3, 0, 2); }')
 381                 if [ -x "$(which ld64.lld)" ]; then
 382                         LLD_LLVM_V="$(ld64.lld --version | awk '{ print substr($2, 0, 2); }')"
 383                 fi
 384         fi
 385 else
 386         CLANG_LLVM_V=$(clang --version | head -n1 | awk '{ print substr($4, 0, 2); }')
 387         if [ -x "$(which ld.lld)" ]; then
 388                 LLD_LLVM_V="$(ld.lld --version | awk '{ print $2; }')"
 389                 if [ "$LLD_LLVM_V" = "LLD" ]; then # eg if the output is "Debian LLD ..."
 390                         LLD_LLVM_V="$(ld.lld --version | awk '{ print substr($3, 0, 2); }')"
 391                 else
 392                         LLD_LLVM_V="$(ld.lld --version | awk '{ print substr($2, 0, 2); }')"
 393                 fi
 394         fi
 395 fi
 396
 397
 398 if [ "$CLANG_LLVM_V" = "$RUSTC_LLVM_V" ]; then
 399         CLANG=clang
 400         CLANGPP=clang++
 401         if [ "$LLD_LLVM_V" = "$CLANG_LLVM_V" ]; then
 402                 LLD=lld
 403         fi
 404 elif [ -x "$(which clang-$RUSTC_LLVM_V)" ]; then
 405         CLANG="$(which clang-$RUSTC_LLVM_V)"
 406         CLANGPP="$(which clang++-$RUSTC_LLVM_V || echo clang++)"
 407         if [ "$($CLANG --version)" != "$($CLANGPP --version)" ]; then
 408                 echo "$CLANG and $CLANGPP are not the same version of clang!"
 409                 unset CLANG
 410                 unset CLANGPP
 411         fi
 412         if [ "$LLD_LLVM_V" != "$RUSTC_LLVM_V" ]; then
 413                 LLD="lld"
 414                 [ -x "$(which lld-$RUSTC_LLVM_V)" ] && LLD="lld-$RUSTC_LLVM_V"
 415                 LLD_LLVM_V="$(ld.lld-$RUSTC_LLVM_V --version | awk '{ print $2; }')"
 416                 if [ "$LLD_LLVM_V" = "LLD" ]; then # eg if the output is "Debian LLD ..."
 417                         LLD_LLVM_V="$(ld.lld-$RUSTC_LLVM_V --version | awk '{ print substr($3, 0, 2); }')"
 418                 else
 419                         LLD_LLVM_V="$(ld.lld-$RUSTC_LLVM_V --version | awk '{ print substr($2, 0, 2); }')"
 420                 fi
 421                 if [ "$LLD_LLVM_V" != "$RUSTC_LLVM_V" ]; then
 422                         echo "Could not find a workable version of lld, not using cross-language LTO"
 423                         unset LLD
 424                 fi
 425         fi
 426 fi
 427
 428 if [ "$CLANG" != "" -a "$CLANGPP" = "" ]; then
 429         echo "WARNING: It appears you have a clang-$RUSTC_LLVM_V but not clang++-$RUSTC_LLVM_V. This is common, but leaves us unable to compile C++ with LLVM $RUSTC_LLVM_V"
 430         echo "You should create a symlink called clang++-$RUSTC_LLVM_V pointing to $CLANG in $(dirname $CLANG)"
 431 fi
 432
 433 # Finally, if we're on OSX or on Linux, build the final debug binary with address sanitizer (and leave it there)
 434 if [ "$HOST_PLATFORM" = "host: x86_64-unknown-linux-gnu" -o "$HOST_PLATFORM" = "host: x86_64-apple-darwin" ]; then
 435         if [ "$CLANGPP" != "" ]; then
 436                 if [ "$HOST_OSX" = "true" ]; then
 437                         # OSX sed is for some reason not compatible with GNU sed
 438                         sed -i .bk 's/,"cdylib"]/]/g' Cargo.toml
 439                 else
 440                         sed -i.bk 's/,"cdylib"]/]/g' Cargo.toml
 441                 fi
 442                 if [ "$CFLAGS_aarch64_apple_darwin" != "" ]; then
 443                         RUSTFLAGS="$BASE_RUSTFLAGS -C target-cpu=apple-a14" RUSTC_BOOTSTRAP=1 cargo rustc $CARGO_BUILD_ARGS --target aarch64-apple-darwin -v -- -Zsanitizer=address -Cforce-frame-pointers=yes || ( mv Cargo.toml.bk Cargo.toml; exit 1)
 444                 fi
 445                 RUSTFLAGS="$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)
 446                 mv Cargo.toml.bk Cargo.toml
 447
 448                 # First the C demo app...
 449                 $CLANG $LOCAL_CFLAGS -fsanitize=address -g demo.c target/debug/libldk.a -ldl
 450                 ASAN_OPTIONS='detect_leaks=1 detect_invalid_pointer_pairs=1 detect_stack_use_after_return=1' ./a.out
 451
 452                 if [ "$2" = "true" ]; then
 453                         # ...then the C++ demo app
 454                         $CLANGPP $LOCAL_CFLAGS -std=c++11 -fsanitize=address -g demo.cpp target/debug/libldk.a -ldl
 455                         ASAN_OPTIONS='detect_leaks=1 detect_invalid_pointer_pairs=1 detect_stack_use_after_return=1' ./a.out >/dev/null
 456
 457                         # ...then the C++ demo app with the ldk_net network implementation
 458                         $CLANG $LOCAL_CFLAGS -fPIC -fsanitize=address -g -I../ldk-net ../ldk-net/ldk_net.c -c -o ldk_net.o
 459                         $CLANGPP $LOCAL_CFLAGS -std=c++11 -fsanitize=address -g -DREAL_NET -I../ldk-net ldk_net.o demo.cpp target/debug/libldk.a -ldl
 460                         ASAN_OPTIONS='detect_leaks=1 detect_invalid_pointer_pairs=1 detect_stack_use_after_return=1' ./a.out >/dev/null
 461                 fi
 462         else
 463                 echo "WARNING: Please install clang-$RUSTC_LLVM_V and clang++-$RUSTC_LLVM_V to build with address sanitizer"
 464         fi
 465 else
 466         echo "WARNING: Can't use address sanitizer on non-Linux, non-OSX non-x86 platforms"
 467 fi
 468
 469 # Now build with LTO on on both C++ and rust, but without cross-language LTO:
 470 # Clear stale release build artifacts from previous runs
 471 cargo clean --release
 472 CARGO_PROFILE_RELEASE_LTO=true RUSTFLAGS="$RUSTFLAGS -C embed-bitcode=yes -C lto" cargo build $CARGO_BUILD_ARGS -v --release
 473 if [ "$2" = "true" ]; then
 474         clang++ $LOCAL_CFLAGS -std=c++11 -O2 demo.cpp target/release/libldk.a -ldl
 475 fi
 476
 477 strip ./a.out
 478 echo "C++ Bin size and runtime with only RL (LTO) optimized:"
 479 ls -lha a.out
 480 time ./a.out > /dev/null
 481
 482 if [ "$CLANGPP" != "" ]; then
 483         # If we can use cross-language LTO, use it for building C dependencies (i.e. libsecp256k1) as well
 484         export CC="$CLANG"
 485         # The cc-rs crate tries to force -fdata-sections and -ffunction-sections on, which
 486         # breaks -fembed-bitcode, so we turn off cc-rs' default flags and specify exactly
 487         # what we want here.
 488         export CFLAGS_$ENV_TARGET="$BASE_HOST_CFLAGS -fPIC -fembed-bitcode -march=sandybridge -mcpu=sandybridge -mtune=sandybridge"
 489         export CRATE_CC_NO_DEFAULTS=true
 490 fi
 491
 492 if [ "$2" = "false" -a "$(rustc --print target-list | grep wasm32-wasi)" != "" ]; then
 493         # Test to see if clang supports wasm32 as a target (which is needed to build rust-secp256k1)
 494         echo "int main() {}" > genbindings_wasm_test_file.c
 495         if clang -nostdlib -o /dev/null --target=wasm32-wasi -Wl,--no-entry genbindings_wasm_test_file.c > /dev/null 2>&1; then
 496                 # And if it does, build a WASM binary without capturing errors
 497                 export CFLAGS_wasm32_wasi="$BASE_CFLAGS -target wasm32 -O1"
 498                 RUSTFLAGS="$BASE_RUSTFLAGS -C opt-level=1 --cfg=test_mod_pointers" cargo build $CARGO_BUILD_ARGS -v --target=wasm32-wasi
 499                 export CFLAGS_wasm32_wasi="$BASE_CFLAGS -fembed-bitcode -target wasm32 -Oz"
 500                 RUSTFLAGS="$BASE_RUSTFLAGS -C embed-bitcode=yes -C opt-level=z -C linker-plugin-lto -C lto" CARGO_PROFILE_RELEASE_LTO=true cargo build $CARGO_BUILD_ARGS -v --release --target=wasm32-wasi
 501         else
 502                 echo "Cannot build WASM lib as clang does not seem to support the wasm32-wasi target"
 503         fi
 504         rm genbindings_wasm_test_file.c
 505 fi
 506
 507 EXTRA_TARGETS=( $LDK_C_BINDINGS_EXTRA_TARGETS )
 508 EXTRA_CCS=( $LDK_C_BINDINGS_EXTRA_TARGET_CCS )
 509
 510 if [ ${#EXTRA_TARGETS[@]} != ${#EXTRA_CCS[@]} ]; then
 511         echo "LDK_C_BINDINGS_EXTRA_TARGETS and LDK_C_BINDINGS_EXTRA_TARGET_CCS didn't have the same number of elements!"
 512         exit 1
 513 fi
 514
 515 for IDX in ${!EXTRA_TARGETS[@]}; do
 516         EXTRA_ENV_TARGET=$(echo "${EXTRA_TARGETS[$IDX]}" | sed 's/-/_/g')
 517         export CFLAGS_$EXTRA_ENV_TARGET="$BASE_CFLAGS"
 518         export CC_$EXTRA_ENV_TARGET=${EXTRA_CCS[$IDX]}
 519         RUSTFLAGS="$BASE_RUSTFLAGS -C embed-bitcode=yes -C lto -C linker=${EXTRA_CCS[$IDX]}" CARGO_PROFILE_RELEASE_LTO=true cargo build $CARGO_BUILD_ARGS -v --release --target "${EXTRA_TARGETS[$IDX]}"
 520 done
 521
 522 if [ "$CLANGPP" != "" -a "$LLD" != "" ]; then
 523         # Finally, test cross-language LTO. Note that this will fail if rustc and clang++
 524         # build against different versions of LLVM (eg when rustc is installed via rustup
 525         # or Ubuntu packages). This should work fine on Distros which do more involved
 526         # packaging than simply shipping the rustup binaries (eg Debian should Just Work
 527         # here).
 528         LINK_ARG_FLAGS="-C link-arg=-fuse-ld=$LLD"
 529         if [ "$HOST_OSX" = "true" ]; then
 530                 export LDK_CLANG_PATH=$(which $CLANG)
 531                 export CLANG="$(pwd)/../deterministic-build-wrappers/clang-lto-link-osx"
 532                 for ARG in "CFLAGS_aarch64_apple_darwin"; do
 533                         MANUAL_LINK_CFLAGS="$MANUAL_LINK_CFLAGS -C link-arg=$ARG"
 534                 done
 535                 export CFLAGS_aarch64_apple_darwin="$CFLAGS_aarch64_apple_darwin -O3 -fPIC -fembed-bitcode"
 536                 LINK_ARG_FLAGS="$LINK_ARG_FLAGS -C link-arg="-isysroot$(xcrun --show-sdk-path)" -C link-arg=-mmacosx-version-min=10.9"
 537                 RUSTFLAGS="$BASE_RUSTFLAGS -C target-cpu=apple-a14 -C embed-bitcode=yes -C linker-plugin-lto -C lto -C linker=$CLANG $LINK_ARG_FLAGS -C link-arg=-mcpu=apple-a14" CARGO_PROFILE_RELEASE_LTO=true cargo build $CARGO_BUILD_ARGS -v --release --target aarch64-apple-darwin
 538         fi
 539         export CFLAGS_$ENV_TARGET="$BASE_HOST_CFLAGS -O3 -fPIC -fembed-bitcode -march=sandybridge -mcpu=sandybridge -mtune=sandybridge"
 540         # Rust doesn't recognize CFLAGS changes, so we need to clean build artifacts
 541         cargo clean --release
 542         CARGO_PROFILE_RELEASE_LTO=true RUSTFLAGS="$RUSTFLAGS -C embed-bitcode=yes -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" cargo build $CARGO_BUILD_ARGS -v --release
 543
 544         if [ "$2" = "true" ]; then
 545                 $CLANGPP $LOCAL_CFLAGS -flto -fuse-ld=$LLD -O2 demo.cpp target/release/libldk.a -ldl
 546                 strip ./a.out
 547                 echo "C++ Bin size and runtime with cross-language LTO:"
 548                 ls -lha a.out
 549                 time ./a.out > /dev/null
 550         fi
 551 else
 552         if [ "$CFLAGS_aarch64_apple_darwin" != "" ]; then
 553                 RUSTFLAGS="$BASE_RUSTFLAGS -C embed-bitcode=yes -C lto -C target-cpu=apple-a14" CARGO_PROFILE_RELEASE_LTO=true cargo build $CARGO_BUILD_ARGS -v --release --target aarch64-apple-darwin
 554         fi
 555         echo "WARNING: Building with cross-language LTO is not avilable without clang-$RUSTC_LLVM_V"
 556 fi