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