_ 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:" | awk '{ print $2 }')"
  25 ENV_TARGET=$(echo $HOST_PLATFORM | sed 's/-/_/g')
  26
  27 # Set path to include our rustc wrapper as well as cbindgen
  28 export LDK_RUSTC_PATH="$(which rustc)"
  29 export RUSTC="$(pwd)/deterministic-build-wrappers/rustc"
  30 PATH="$PATH:~/.cargo/bin"
  31
  32 # Set up CFLAGS and RUSTFLAGS vars appropriately for building libsecp256k1 and demo apps...
  33 BASE_CFLAGS="" # CFLAGS for libsecp256k1
  34 LOCAL_CFLAGS="" # CFLAGS for demo apps
  35
  36 # Remap paths so that our builds are deterministic
  37 BASE_RUSTFLAGS="--cfg=c_bindings --remap-path-prefix $LIGHTNING_PATH=rust-lightning --remap-path-prefix $(pwd)=ldk-c-bindings --remap-path-prefix $HOME/.cargo="
  38
  39 # If the C compiler supports it, also set -ffile-prefix-map
  40 echo "int main() {}" > genbindings_path_map_test_file.c
  41 clang -o /dev/null -ffile-prefix-map=$HOME/.cargo= genbindings_path_map_test_file.c > /dev/null 2>&1 &&
  42 export BASE_CFLAGS="-ffile-prefix-map=$HOME/.cargo="
  43
  44 BASE_CFLAGS="$BASE_CFLAGS -frandom-seed=42"
  45 LOCAL_CFLAGS="-Wall -Wno-nullability-completeness -pthread -Iinclude/"
  46
  47 HOST_OSX=false
  48 if [ "$HOST_PLATFORM" = "x86_64-apple-darwin" ]; then
  49         HOST_OSX=true
  50 elif [ "$HOST_PLATFORM" = "aarch64-apple-darwin" ]; then
  51         HOST_OSX=true
  52 fi
  53
  54 BASE_HOST_CFLAGS="$BASE_CFLAGS"
  55
  56 if [ "$MACOS_SDK" = "" -a "$HOST_OSX" = "true" ]; then
  57         MACOS_SDK="$(xcrun --show-sdk-path)"
  58         [ "$MACOS_SDK" = "" ] && exit 1
  59 fi
  60
  61 if [ "$MACOS_SDK" != "" ]; then
  62         export MACOSX_DEPLOYMENT_TARGET=10.9
  63         BASE_HOST_OSX_CFLAGS="$BASE_HOST_CFLAGS -isysroot$MACOS_SDK -mmacosx-version-min=10.9"
  64         export CFLAGS_aarch64_apple_darwin="$BASE_HOST_OSX_CFLAGS --target=aarch64-apple-darwin -mcpu=apple-a14"
  65         export CFLAGS_x86_64_apple_darwin="$BASE_HOST_OSX_CFLAGS --target=x86_64-apple-darwin -march=sandybridge -mtune=sandybridge"
  66         if [ "$HOST_OSX" = "true" ]; then
  67                 LOCAL_CFLAGS="$LOCAL_CFLAGS --target=$HOST_PLATFORM -isysroot$MACOS_SDK -mmacosx-version-min=10.9"
  68                 BASE_HOST_CFLAGS="$BASE_HOST_OSX_CFLAGS --target=$HOST_PLATFORM"
  69         fi
  70 fi
  71
  72 rm genbindings_path_map_test_file.c
  73
  74 case "$ENV_TARGET" in
  75         "x86_64"*)
  76                 export RUSTFLAGS="$BASE_RUSTFLAGS -C target-cpu=sandybridge"
  77                 export BASE_HOST_CFLAGS="$BASE_HOST_CFLAGS -march=sandybridge -mcpu=sandybridge -mtune=sandybridge"
  78                 export CFLAGS_$ENV_TARGET="$BASE_HOST_CFLAGS"
  79                 ;;
  80         "aarch64_apple_darwin")
  81                 export RUSTFLAGS="$BASE_RUSTFLAGS -C target-cpu=apple-a14"
  82                 export BASE_HOST_CFLAGS="$BASE_HOST_CFLAGS -mcpu=apple-a14"
  83                 export CFLAGS_$ENV_TARGET="$BASE_HOST_CFLAGS"
  84                 ;;
  85         *)
  86                 # Assume this isn't targeted at another host and build for the host's CPU.
  87                 export RUSTFLAGS="$BASE_RUSTFLAGS -C target-cpu=native"
  88                 export BASE_HOST_CFLAGS="$BASE_HOST_CFLAGS -mcpu=native"
  89                 export CFLAGS_$ENV_TARGET="$BASE_HOST_CFLAGS"
  90                 ;;
  91 esac
  92
  93 # First build the latest c-bindings-gen binary
  94 cd c-bindings-gen && cargo build --release && cd ..
  95
  96 # Then wipe all the existing C bindings (because we're being run in the right directory)
  97 # note that we keep the few manually-generated files first:
  98 mv lightning-c-bindings/src/c_types/mod.rs ./
  99 mv lightning-c-bindings/src/bitcoin ./
 100
 101 # Before we try to sed the Cargo.toml, generate version define tags
 102 # (ignoring any files that we're about to generate)
 103
 104 git checkout lightning-c-bindings/src
 105 git checkout lightning-c-bindings/include
 106 BINDINGS_GIT="$(git describe --tag --dirty --abbrev=16)"
 107 echo "$(cat <<EOF
 108 #ifndef _LDK_HEADER_VER
 109 static inline int _ldk_strncmp(const char *s1, const char *s2, uint64_t n) {
 110         if (n && *s1 != *s2) return 1;
 111         while (n && *s1 != 0 && *s2 != 0) {
 112                 s1++; s2++; n--;
 113                 if (n && *s1 != *s2) return 1;
 114         }
 115         return 0;
 116 }
 117
 118 #define _LDK_HEADER_VER "${LIGHTNING_GIT}"
 119 #define _LDK_C_BINDINGS_HEADER_VER "${BINDINGS_GIT}"
 120 static inline const char* check_get_ldk_version() {
 121         LDKStr bin_ver = _ldk_get_compiled_version();
 122         if (_ldk_strncmp(_LDK_HEADER_VER, (const char*)bin_ver.chars, bin_ver.len) != 0) {
 123         // Version mismatch, we don't know what we're running!
 124                 return 0;
 125         }
 126         return _LDK_HEADER_VER;
 127 }
 128 static inline const char* check_get_ldk_bindings_version() {
 129         LDKStr bin_ver = _ldk_c_bindings_get_compiled_version();
 130         if (_ldk_strncmp(_LDK_C_BINDINGS_HEADER_VER, (const char*)bin_ver.chars, bin_ver.len) != 0) {
 131         // Version mismatch, we don't know what we're running!
 132                 return 0;
 133         }
 134         return _LDK_C_BINDINGS_HEADER_VER;
 135 }
 136 #endif /* _LDK_HEADER_VER */
 137 EOF
 138 )" > lightning-c-bindings/include/ldk_ver.h
 139
 140 rm -rf lightning-c-bindings/src
 141
 142 mkdir -p lightning-c-bindings/src/{c_types,lightning}
 143 mv ./mod.rs lightning-c-bindings/src/c_types/
 144 mv ./bitcoin lightning-c-bindings/src/
 145
 146 # Finally, run the c-bindings-gen binary, building fresh bindings.
 147 OUT="$(pwd)/lightning-c-bindings/src"
 148 OUT_TEMPL="$(pwd)/lightning-c-bindings/src/c_types/derived.rs"
 149 OUT_F="$(pwd)/lightning-c-bindings/include/ldk_rust_types.h"
 150 OUT_CPP="$(pwd)/lightning-c-bindings/include/lightningpp.hpp"
 151 BIN="$(pwd)/c-bindings-gen/target/release/c-bindings-gen"
 152
 153 function is_gnu_sed(){
 154   sed --version >/dev/null 2>&1
 155 }
 156
 157 function add_crate() {
 158         pushd "$LIGHTNING_PATH/$1"
 159         RUSTC_BOOTSTRAP=1 cargo rustc --profile=check --no-default-features $3 -- --cfg=c_bindings -Zunpretty=expanded > /tmp/$1-crate-source.txt
 160         popd
 161         if [ "$HOST_OSX" = "true" ]; then
 162                 sed -i".original" "1i\\
 163 pub mod $2 {
 164 " /tmp/$1-crate-source.txt
 165         else
 166                 sed -i "1ipub mod $2 {\n" /tmp/$1-crate-source.txt
 167         fi
 168         echo "}" >> /tmp/$1-crate-source.txt
 169         cat /tmp/$1-crate-source.txt >> /tmp/crate-source.txt
 170         rm /tmp/$1-crate-source.txt
 171         if is_gnu_sed; then
 172                 sed -E -i 's|#*'$1' = \{ .*|'$1' = \{ path = "'"$LIGHTNING_PATH"'/'$1'", default-features = false }|' lightning-c-bindings/Cargo.toml
 173         else
 174                 # OSX sed is for some reason not compatible with GNU sed
 175                 sed -E -i '' 's|#*'$1' = \{ .*|'$1' = \{ path = "'"$LIGHTNING_PATH"'/'$1'", default-features = false }|' lightning-c-bindings/Cargo.toml
 176         fi
 177 }
 178
 179 function drop_crate() {
 180         if is_gnu_sed; then
 181                 sed -E -i 's|'$1' = \{ (.*)|#'$1' = \{ \1|' lightning-c-bindings/Cargo.toml
 182         else
 183                 # OSX sed is for some reason not compatible with GNU sed
 184                 sed -E -i '' 's|'$1' = \{ (.*)|#'$1' = \{ \1|' lightning-c-bindings/Cargo.toml
 185         fi
 186 }
 187
 188 echo > /tmp/crate-source.txt
 189 if [ "$2" = "true" ]; then
 190         add_crate lightning lightning --features=std
 191         add_crate "lightning-persister" "lightning_persister"
 192         add_crate "lightning-background-processor" "lightning_background_processor" --features=std
 193         add_crate "lightning-invoice" "lightning_invoice" --features=std
 194         add_crate "lightning-rapid-gossip-sync" "lightning_rapid_gossip_sync"
 195         CARGO_BUILD_ARGS="--features=std"
 196 else
 197         add_crate lightning lightning --features=no-std
 198         drop_crate "lightning-persister"
 199         add_crate "lightning-background-processor" "lightning_background_processor"
 200         add_crate "lightning-rapid-gossip-sync" "lightning_rapid_gossip_sync" --features=no-std
 201         add_crate "lightning-invoice" "lightning_invoice" --features=no-std
 202         CARGO_BUILD_ARGS="--features=no-std"
 203 fi
 204
 205 cat /tmp/crate-source.txt | RUST_BACKTRACE=1 "$BIN" "$OUT/" "$OUT_TEMPL" "$OUT_F" "$OUT_CPP"
 206
 207 echo "$(cat <<EOF
 208 #[no_mangle]
 209 pub extern "C" fn _ldk_get_compiled_version() -> crate::c_types::Str {
 210         "${LIGHTNING_GIT}".into()
 211 }
 212 #[no_mangle]
 213 pub extern "C" fn _ldk_c_bindings_get_compiled_version() -> crate::c_types::Str {
 214         "${BINDINGS_GIT}".into()
 215 }
 216 EOF
 217 )" >> lightning-c-bindings/src/version.rs
 218
 219 # Now cd to lightning-c-bindings, build the generated bindings, and call cbindgen to build a C header file
 220 cd lightning-c-bindings
 221
 222 RUSTFLAGS="$RUSTFLAGS --cfg=test_mod_pointers" cargo build $CARGO_BUILD_ARGS
 223 if [ "$CFLAGS_aarch64_apple_darwin" != "" -a "$HOST_OSX" = "true" ]; then
 224         RUSTFLAGS="$BASE_RUSTFLAGS -C target-cpu=apple-a14" cargo build $CARGO_BUILD_ARGS --target aarch64-apple-darwin
 225 fi
 226 cbindgen -v --config cbindgen.toml -o include/lightning.h >/dev/null 2>&1
 227
 228 # cbindgen is relatively braindead when exporting typedefs -
 229 # it happily exports all our typedefs for private types, even with the
 230 # generics we specified in C mode! So we drop all those types manually here.
 231 if is_gnu_sed; then
 232         sed -i 's/typedef LDKnative.*Import.*LDKnative.*;//g' include/lightning.h
 233
 234         # stdlib.h doesn't exist in clang's wasm sysroot, and cbindgen
 235         # doesn't actually use it anyway, so drop the import.
 236         sed -i 's/#include <stdlib.h>/#include "ldk_rust_types.h"/g' include/lightning.h
 237 else
 238         # OSX sed is for some reason not compatible with GNU sed
 239         sed -i '' 's/typedef LDKnative.*Import.*LDKnative.*;//g' include/lightning.h
 240
 241         # stdlib.h doesn't exist in clang's wasm sysroot, and cbindgen
 242         # doesn't actually use it anyway, so drop the import.
 243         sed -i '' 's/#include <stdlib.h>/#include "ldk_rust_types.h"/g' include/lightning.h
 244 fi
 245
 246 # Build C++ class methods which call trait methods
 247 echo "Updating C++ header, this may take some time, especially on macOS"
 248 set +x # Echoing every command is very verbose here
 249 OLD_IFS="$IFS"
 250 export IFS=''
 251 echo '#include <string.h>' > include/lightningpp_new.hpp
 252 echo 'namespace LDK {' >> include/lightningpp_new.hpp
 253 echo '// Forward declarations' >> include/lightningpp_new.hpp
 254 cat include/lightningpp.hpp | sed -n 's/class \(.*\) {/class \1;/p' >> include/lightningpp_new.hpp
 255 echo '' >> include/lightningpp_new.hpp
 256
 257 DECLS=""
 258 while read LINE; do
 259         case "$LINE" in
 260                 "#include <string.h>")
 261                         # We already printed this above.
 262                         ;;
 263                 "namespace LDK {")
 264                         # We already printed this above.
 265                         ;;
 266                 "}")
 267                         # We'll print this at the end
 268                         ;;
 269                 "XXX"*)
 270                         NEW_STRUCT_NAME="$(echo "$LINE" | awk '{ print $2 }')"
 271                         if [ "$NEW_STRUCT_NAME" != "$STRUCT_NAME" ]; then
 272                                 STRUCT_CONTENTS="$(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 "}")"
 273                         fi
 274                         STRUCT_NAME="$NEW_STRUCT_NAME"
 275                         METHOD_NAME="$(echo "$LINE" | awk '{ print $3 }')"
 276                         METHOD="$(echo "$STRUCT_CONTENTS" | grep "(\*$METHOD_NAME)")"
 277                         if [ "$METHOD" = "" ]; then
 278                                 echo "Unable to find method declaration for $LINE"
 279                                 exit 1
 280                         fi
 281                         RETVAL="$(echo "$METHOD" | sed 's/[ ]*\([A-Za-z0-9 _]*\)(\*\(.*\)).*/\1/' | sed -E 's/^(struct|enum) LDK/LDK::/g' | tr -d ' ')"
 282                         [ "$RETVAL" = "LDK::SecretKey" ] && RETVAL="LDKSecretKey"
 283                         [ "$RETVAL" = "LDK::PublicKey" ] && RETVAL="LDKPublicKey"
 284                         [ "$RETVAL" = "LDK::ThirtyTwoBytes" ] && RETVAL="LDKThirtyTwoBytes"
 285                         PARAMS="$(echo "$METHOD" | sed 's/.*(\*.*)(\(const \)*void \*this_arg\(, \)*\(.*\));/\3/')"
 286
 287                         echo -e "\tinline $RETVAL $METHOD_NAME($PARAMS);" >> include/lightningpp_new.hpp
 288                         DECLS="$DECLS"$'\n'"inline $RETVAL $STRUCT_NAME::$METHOD_NAME($PARAMS) {"
 289
 290                         DECLS="$DECLS"$'\n'$'\t'
 291                         [ "$RETVAL" != "void" ] && DECLS="$DECLS$RETVAL ret = "
 292                         DECLS="$DECLS(self.$METHOD_NAME)(self.this_arg"
 293
 294                         IFS=','; for PARAM in $PARAMS; do
 295                                 DECLS="$DECLS, "
 296                                 DECLS="$DECLS$(echo $PARAM | sed 's/.* (*\**\([a-zA-Z0-9_]*\)\()[\[0-9\]*]\)*/\1/')"
 297                         done
 298                         IFS=''
 299
 300                         DECLS="$DECLS);"
 301                         [ "$RETVAL" != "void" ] && DECLS="$DECLS"$'\n'$'\t'"return ret;"
 302                         DECLS="$DECLS"$'\n'"}"
 303                         ;;
 304                 *)
 305                         echo "$LINE" >> include/lightningpp_new.hpp
 306         esac
 307 done < include/lightningpp.hpp
 308 echo "$DECLS" >> include/lightningpp_new.hpp
 309 echo "}" >> include/lightningpp_new.hpp
 310 export IFS="$OLD_IFS"
 311 set -x
 312 mv include/lightningpp_new.hpp include/lightningpp.hpp
 313
 314 # Finally, sanity-check the generated C and C++ bindings with demo apps:
 315 # Naively run the C demo app:
 316 gcc $LOCAL_CFLAGS -Wall -g -pthread demo.c target/debug/libldk.a -ldl -lm
 317 ./a.out
 318
 319 # And run the C++ demo app
 320 if [ "$2" = "true" ]; then
 321         g++ $LOCAL_CFLAGS -std=c++11 -Wall -g -pthread demo.cpp -Ltarget/debug/ -lldk -ldl
 322         LD_LIBRARY_PATH=target/debug/ ./a.out > /dev/null
 323 fi
 324
 325 # Finally, run the C++ demo app with our native networking library
 326 # in valgrind to test memory model correctness and lack of leaks.
 327 gcc $LOCAL_CFLAGS -fPIC -std=c99 -Wall -g -pthread -I../ldk-net ../ldk-net/ldk_net.c -c -o ldk_net.o
 328 if [ "$2" = "true" ]; then
 329         g++ $LOCAL_CFLAGS -std=c++11 -Wall -g -pthread -DREAL_NET -I../ldk-net ldk_net.o demo.cpp target/debug/libldk.a -ldl -lm
 330         if [ -x "`which valgrind`" -a "$(uname -m)" != "ppc64le" ]; then
 331                 valgrind --error-exitcode=4 --memcheck:leak-check=full --show-leak-kinds=all ./a.out
 332                 echo
 333         else
 334                 echo "WARNING: Please install valgrind for more testing"
 335                 ./a.out
 336         fi
 337 fi
 338
 339
 340 # Test a statically-linked C++ version, tracking the resulting binary size and runtime
 341 # across debug, LTO, and cross-language LTO builds (using the same compiler each time).
 342 if [ "$2" = "true" ]; then
 343         clang++ $LOCAL_CFLAGS -std=c++11 demo.cpp target/debug/libldk.a -ldl
 344         strip ./a.out
 345         time ./a.out
 346         echo " C++ Bin size and runtime w/o optimization:"
 347         ls -lha a.out
 348 fi
 349
 350 # Then, check with memory sanitizer, if we're on Linux and have rustc nightly
 351 if [ "$HOST_PLATFORM" = "x86_64-unknown-linux-gnu" ]; then
 352         if cargo +nightly --version >/dev/null 2>&1; then
 353                 LLVM_V=$(rustc +nightly --version --verbose | grep "LLVM version" | awk '{ print substr($3, 0, 2); }')
 354                 if [ -x "$(which clang-$LLVM_V)" ]; then
 355                         cargo +nightly clean
 356                         cargo +nightly rustc $CARGO_BUILD_ARGS -Zbuild-std=std,panic_abort --target x86_64-unknown-linux-gnu -v -- -Zsanitizer=memory -Zsanitizer-memory-track-origins -Cforce-frame-pointers=yes
 357                         mv target/x86_64-unknown-linux-gnu/debug/libldk.* target/debug/
 358
 359                         # Sadly, std doesn't seem to compile into something that is memsan-safe as of Aug 2020,
 360                         # so we'll always fail, not to mention we may be linking against git rustc LLVM which
 361                         # may differ from clang-llvm, so just allow everything here to fail.
 362                         set +e
 363
 364                         # First the C demo app...
 365                         clang-$LLVM_V $LOCAL_CFLAGS -fsanitize=memory -fsanitize-memory-track-origins -g demo.c target/debug/libldk.a -ldl
 366                         ./a.out
 367
 368                         if [ "$2" = "true" ]; then
 369                                 # ...then the C++ demo app
 370                                 clang++-$LLVM_V $LOCAL_CFLAGS -std=c++11 -fsanitize=memory -fsanitize-memory-track-origins -g demo.cpp target/debug/libldk.a -ldl
 371                                 ./a.out >/dev/null
 372
 373                                 # ...then the C++ demo app with the ldk_net network implementation
 374                                 clang-$LLVM_V $LOCAL_CFLAGS -std=c99 -fsanitize=memory -fsanitize-memory-track-origins -g -I../ldk-net ../ldk-net/ldk_net.c -c -o ldk_net.o
 375                                 clang++-$LLVM_V $LOCAL_CFLAGS -std=c++11 -fsanitize=memory -fsanitize-memory-track-origins -g -DREAL_NET -I../ldk-net ldk_net.o demo.cpp target/debug/libldk.a -ldl
 376                                 ./a.out >/dev/null
 377                         fi
 378
 379                         # restore exit-on-failure
 380                         set -e
 381                 else
 382                         echo "WARNING: Can't use memory sanitizer without clang-$LLVM_V"
 383                 fi
 384         else
 385                 echo "WARNING: Can't use memory sanitizer without rustc nightly"
 386         fi
 387 else
 388         echo "WARNING: Can't use memory sanitizer on non-Linux, non-x86 platforms"
 389 fi
 390
 391 RUSTC_LLVM_V=$(rustc --version --verbose | grep "LLVM version" | awk '{ print substr($3, 0, 2); }')
 392
 393 if [ "$HOST_OSX" = "true" ]; then
 394         # Apple is special, as always, and their versions of clang aren't
 395         # compatible with upstream LLVM.
 396         if [ "$(clang --version | grep 'Apple clang')" != "" ]; then
 397                 echo "Apple clang isn't compatible with upstream clang, install upstream clang"
 398                 CLANG_LLVM_V="0"
 399         else
 400                 CLANG_LLVM_V=$(clang --version | head -n1 | awk '{ print substr($3, 0, 2); }')
 401                 if [ -x "$(which ld64.lld)" ]; then
 402                         LLD_LLVM_V="$(ld64.lld --version | awk '{ print substr($2, 0, 2); }')"
 403                 fi
 404         fi
 405 else
 406         CLANG_LLVM_V=$(clang --version | head -n1 | awk '{ print substr($4, 0, 2); }')
 407         if [ -x "$(which ld.lld)" ]; then
 408                 LLD_LLVM_V="$(ld.lld --version | awk '{ print $2; }')"
 409                 if [ "$LLD_LLVM_V" = "LLD" ]; then # eg if the output is "Debian LLD ..."
 410                         LLD_LLVM_V="$(ld.lld --version | awk '{ print substr($3, 0, 2); }')"
 411                 else
 412                         LLD_LLVM_V="$(ld.lld --version | awk '{ print substr($2, 0, 2); }')"
 413                 fi
 414         fi
 415 fi
 416
 417
 418 if [ "$CLANG_LLVM_V" = "$RUSTC_LLVM_V" ]; then
 419         CLANG=clang
 420         CLANGPP=clang++
 421         if [ "$LLD_LLVM_V" = "$CLANG_LLVM_V" ]; then
 422                 LLD=lld
 423         fi
 424 elif [ -x "$(which clang-$RUSTC_LLVM_V)" ]; then
 425         CLANG="$(which clang-$RUSTC_LLVM_V)"
 426         CLANGPP="$(which clang++-$RUSTC_LLVM_V || echo clang++)"
 427         if [ "$($CLANG --version)" != "$($CLANGPP --version)" ]; then
 428                 echo "$CLANG and $CLANGPP are not the same version of clang!"
 429                 unset CLANG
 430                 unset CLANGPP
 431         fi
 432         if [ "$LLD_LLVM_V" != "$RUSTC_LLVM_V" ]; then
 433                 LLD="lld"
 434                 [ -x "$(which lld-$RUSTC_LLVM_V)" ] && LLD="lld-$RUSTC_LLVM_V"
 435                 LLD_LLVM_V="$(ld.lld-$RUSTC_LLVM_V --version | awk '{ print $2; }')"
 436                 if [ "$LLD_LLVM_V" = "LLD" ]; then # eg if the output is "Debian LLD ..."
 437                         LLD_LLVM_V="$(ld.lld-$RUSTC_LLVM_V --version | awk '{ print substr($3, 0, 2); }')"
 438                 else
 439                         LLD_LLVM_V="$(ld.lld-$RUSTC_LLVM_V --version | awk '{ print substr($2, 0, 2); }')"
 440                 fi
 441                 if [ "$LLD_LLVM_V" != "$RUSTC_LLVM_V" ]; then
 442                         echo "Could not find a workable version of lld, not using cross-language LTO"
 443                         unset LLD
 444                 fi
 445         fi
 446 fi
 447
 448 if [ "$CLANG" != "" -a "$CLANGPP" = "" ]; then
 449         echo "WARNING: It appears you have a clang-$RUSTC_LLVM_V but not clang++-$RUSTC_LLVM_V. This is common, but leaves us unable to compile C++ with LLVM $RUSTC_LLVM_V"
 450         echo "You should create a symlink called clang++-$RUSTC_LLVM_V pointing to $CLANG in $(dirname $CLANG)"
 451 fi
 452
 453 # Finally, if we're on OSX or on Linux, build the final debug binary with address sanitizer (and leave it there)
 454 if [ "$HOST_PLATFORM" = "x86_64-unknown-linux-gnu" -o "$HOST_PLATFORM" = "x86_64-apple-darwin" ]; then
 455         if [ "$CLANGPP" != "" ]; then
 456                 if is_gnu_sed; then
 457                         sed -i.bk 's/,"cdylib"]/]/g' Cargo.toml
 458                 else
 459                         # OSX sed is for some reason not compatible with GNU sed
 460                         sed -i .bk 's/,"cdylib"]/]/g' Cargo.toml
 461                 fi
 462
 463                 if [ "$CFLAGS_aarch64_apple_darwin" != "" -a "$HOST_OSX" = "true" ]; then
 464                         RUSTFLAGS="$BASE_RUSTFLAGS -C target-cpu=apple-a14" RUSTC_BOOTSTRAP=1 cargo rustc $CARGO_BUILD_ARGS --target aarch64-apple-darwin -v -- -Zsanitizer=address -Cforce-frame-pointers=yes || ( mv Cargo.toml.bk Cargo.toml; exit 1)
 465                 fi
 466                 RUSTFLAGS="$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)
 467                 mv Cargo.toml.bk Cargo.toml
 468
 469                 # First the C demo app...
 470                 $CLANG $LOCAL_CFLAGS -fsanitize=address -g demo.c target/debug/libldk.a -ldl
 471                 ASAN_OPTIONS='detect_leaks=1 detect_invalid_pointer_pairs=1 detect_stack_use_after_return=1' ./a.out
 472
 473                 if [ "$2" = "true" ]; then
 474                         # ...then the C++ demo app
 475                         $CLANGPP $LOCAL_CFLAGS -std=c++11 -fsanitize=address -g demo.cpp target/debug/libldk.a -ldl
 476                         ASAN_OPTIONS='detect_leaks=1 detect_invalid_pointer_pairs=1 detect_stack_use_after_return=1' ./a.out >/dev/null
 477
 478                         # ...then the C++ demo app with the ldk_net network implementation
 479                         $CLANG $LOCAL_CFLAGS -fPIC -fsanitize=address -g -I../ldk-net ../ldk-net/ldk_net.c -c -o ldk_net.o
 480                         $CLANGPP $LOCAL_CFLAGS -std=c++11 -fsanitize=address -g -DREAL_NET -I../ldk-net ldk_net.o demo.cpp target/debug/libldk.a -ldl
 481                         ASAN_OPTIONS='detect_leaks=1 detect_invalid_pointer_pairs=1 detect_stack_use_after_return=1' ./a.out >/dev/null
 482                 fi
 483         else
 484                 echo "WARNING: Please install clang-$RUSTC_LLVM_V and clang++-$RUSTC_LLVM_V to build with address sanitizer"
 485         fi
 486 else
 487         echo "WARNING: Can't use address sanitizer on non-Linux, non-OSX non-x86 platforms"
 488 fi
 489
 490 # Now build with LTO on on both C++ and rust, but without cross-language LTO:
 491 # Clear stale release build artifacts from previous runs
 492 cargo clean --release
 493 CARGO_PROFILE_RELEASE_LTO=true RUSTFLAGS="$RUSTFLAGS -C embed-bitcode=yes -C lto" cargo build $CARGO_BUILD_ARGS -v --release
 494 if [ "$2" = "true" ]; then
 495         clang++ $LOCAL_CFLAGS -std=c++11 -O2 demo.cpp target/release/libldk.a -ldl
 496 fi
 497
 498 strip ./a.out
 499 time ./a.out
 500 echo "C++ Bin size and runtime with only RL (LTO) optimized:"
 501 ls -lha a.out
 502
 503 if [ "$CLANGPP" != "" ]; then
 504         # If we can use cross-language LTO, use it for building C dependencies (i.e. libsecp256k1) as well
 505         export CC="$CLANG"
 506         # The cc-rs crate tries to force -fdata-sections and -ffunction-sections on, which
 507         # breaks -fembed-bitcode, so we turn off cc-rs' default flags and specify exactly
 508         # what we want here.
 509         export CFLAGS_$ENV_TARGET="$BASE_HOST_CFLAGS -fPIC -fembed-bitcode"
 510         export CRATE_CC_NO_DEFAULTS=true
 511 fi
 512
 513 if [ "$2" = "false" -a "$(rustc --print target-list | grep wasm32-wasi)" != "" ]; then
 514         # Test to see if clang supports wasm32 as a target (which is needed to build rust-secp256k1)
 515         echo "int main() {}" > genbindings_wasm_test_file.c
 516         if clang -nostdlib -o /dev/null --target=wasm32-wasi -Wl,--no-entry genbindings_wasm_test_file.c > /dev/null 2>&1; then
 517                 # And if it does, build a WASM binary without capturing errors
 518                 export CFLAGS_wasm32_wasi="$BASE_CFLAGS -target wasm32-wasi -O1"
 519                 RUSTFLAGS="$BASE_RUSTFLAGS -C opt-level=1 --cfg=test_mod_pointers" cargo build $CARGO_BUILD_ARGS -v --target=wasm32-wasi
 520                 export CFLAGS_wasm32_wasi="$BASE_CFLAGS -fembed-bitcode -target wasm32-wasi -Oz"
 521                 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
 522         else
 523                 echo "Cannot build WASM lib as clang does not seem to support the wasm32-wasi target"
 524         fi
 525         rm genbindings_wasm_test_file.c
 526 fi
 527
 528 EXTRA_TARGETS=( $LDK_C_BINDINGS_EXTRA_TARGETS )
 529 EXTRA_CCS=( $LDK_C_BINDINGS_EXTRA_TARGET_CCS )
 530
 531 if [ ${#EXTRA_TARGETS[@]} != ${#EXTRA_CCS[@]} ]; then
 532         echo "LDK_C_BINDINGS_EXTRA_TARGETS and LDK_C_BINDINGS_EXTRA_TARGET_CCS didn't have the same number of elements!"
 533         exit 1
 534 fi
 535
 536 for IDX in ${!EXTRA_TARGETS[@]}; do
 537         EXTRA_ENV_TARGET=$(echo "${EXTRA_TARGETS[$IDX]}" | sed 's/-/_/g')
 538         export CFLAGS_$EXTRA_ENV_TARGET="$BASE_CFLAGS"
 539         export CC_$EXTRA_ENV_TARGET=${EXTRA_CCS[$IDX]}
 540         RUSTFLAGS="$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[$IDX]}"
 541 done
 542
 543 if [ "$CLANGPP" != "" -a "$LLD" != "" ]; then
 544         # Finally, test cross-language LTO. Note that this will fail if rustc and clang++
 545         # build against different versions of LLVM (eg when rustc is installed via rustup
 546         # or Ubuntu packages). This should work fine on Distros which do more involved
 547         # packaging than simply shipping the rustup binaries (eg Debian should Just Work
 548         # here).
 549         LINK_ARG_FLAGS="-C link-arg=-fuse-ld=$LLD"
 550         export LDK_CLANG_PATH=$(which $CLANG)
 551         if [ "$MACOS_SDK" != "" ]; then
 552                 export CLANG="$(pwd)/../deterministic-build-wrappers/clang-lto-link-osx"
 553                 for ARG in $CFLAGS_aarch64_apple_darwin; do
 554                         MANUAL_LINK_CFLAGS="$MANUAL_LINK_CFLAGS -C link-arg=$ARG"
 555                 done
 556                 export CFLAGS_aarch64_apple_darwin="$CFLAGS_aarch64_apple_darwin -O3 -fPIC -fembed-bitcode"
 557                 RUSTC_BOOTSTRAP=1 RUSTFLAGS="$BASE_RUSTFLAGS -C target-cpu=apple-a14 -C embed-bitcode=yes -C linker-plugin-lto -C lto -C linker=$CLANG $MANUAL_LINK_CFLAGS $LINK_ARG_FLAGS -C link-arg=-mcpu=apple-a14" CARGO_PROFILE_RELEASE_LTO=true cargo build $CARGO_BUILD_ARGS -v --release --target aarch64-apple-darwin -Zbuild-std=std,panic_abort
 558                 if [ "$HOST_OSX" != "true" ]; then
 559                         # If we're not on OSX but can build OSX binaries, build the x86_64 OSX release now
 560                         MANUAL_LINK_CFLAGS=""
 561                         for ARG in $CFLAGS_x86_64_apple_darwin; do
 562                                 MANUAL_LINK_CFLAGS="$MANUAL_LINK_CFLAGS -C link-arg=$ARG"
 563                         done
 564                         export CFLAGS_x86_64_apple_darwin="$CFLAGS_x86_64_apple_darwin -O3 -fPIC -fembed-bitcode"
 565                         RUSTC_BOOTSTRAP=1 RUSTFLAGS="$BASE_RUSTFLAGS -C target-cpu=sandybridge -C embed-bitcode=yes -C linker-plugin-lto -C lto -C linker=$CLANG $MANUAL_LINK_CFLAGS $LINK_ARG_FLAGS -C link-arg=-mcpu=sandybridge -C link-arg=-mtune=sandybridge" CARGO_PROFILE_RELEASE_LTO=true cargo build $CARGO_BUILD_ARGS -v --release --target x86_64-apple-darwin -Zbuild-std=std,panic_abort
 566                 fi
 567         fi
 568         # If we're on an M1 don't bother building X86 binaries
 569         if [ "$HOST_PLATFORM" != "aarch64-apple-darwin" ]; then
 570                 [ "$HOST_OSX" != "true" ] && export CLANG="$LDK_CLANG_PATH"
 571                 export CFLAGS_$ENV_TARGET="$BASE_HOST_CFLAGS -O3 -fPIC -fembed-bitcode"
 572                 # Rust doesn't recognize CFLAGS changes, so we need to clean build artifacts
 573                 cargo clean --release
 574                 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
 575
 576                 if [ "$2" = "true" ]; then
 577                         $CLANGPP $LOCAL_CFLAGS -flto -fuse-ld=$LLD -O2 -c demo.cpp -o demo.o
 578                         $CLANGPP $LOCAL_CFLAGS -flto -fuse-ld=$LLD -Wl,--lto-O2 -Wl,-O2 -O2 demo.o target/release/libldk.a -ldl
 579                         strip ./a.out
 580                         time ./a.out
 581                         echo "C++ Bin size and runtime with cross-language LTO:"
 582                         ls -lha a.out
 583                 fi
 584         fi
 585 else
 586         if [ "$CFLAGS_aarch64_apple_darwin" != "" ]; then
 587                 RUSTFLAGS="$BASE_RUSTFLAGS -C embed-bitcode=yes -C lto -C target-cpu=apple-a14" CARGO_PROFILE_RELEASE_LTO=true cargo build $CARGO_BUILD_ARGS -v --release --target aarch64-apple-darwin
 588         fi
 589         echo "WARNING: Building with cross-language LTO is not avilable without clang-$RUSTC_LLVM_V and lld-$RUSTC_LLVM_V"
 590 fi