git.bitcoin.ninja 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 BASE_RUSTFLAGS="" # RUSTFLAGS
  35
  36 # Remap paths so that our builds are deterministic
  37 BASE_RUSTFLAGS="--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 if [ "$HOST_PLATFORM" = "host: x86_64-apple-darwin" ]; then
  48         export MACOSX_DEPLOYMENT_TARGET=10.9
  49         LOCAL_CFLAGS="$LOCAL_CFLAGS -isysroot$(xcrun --show-sdk-path) -mmacosx-version-min=10.9"
  50         BASE_CFLAGS="$BASE_CFLAGS -isysroot$(xcrun --show-sdk-path) -mmacosx-version-min=10.9"
  51         # Targeting aarch64 appears to be supported only starting with Big Sur, so check it before use
  52         clang -o /dev/null $BASE_CFLAGS --target=aarch64-apple-darwin -mcpu=apple-a14 genbindings_path_map_test_file.c &&
  53         export CFLAGS_aarch64_apple_darwin="$BASE_CFLAGS --target=aarch64-apple-darwin -mcpu=apple-a14" ||
  54         echo "WARNING: Can not build targeting aarch64-apple-darin. Upgrade to Big Sur or try upstream clang"
  55 fi
  56
  57 rm genbindings_path_map_test_file.c
  58
  59 ENV_TARGET=$(rustc --version --verbose | grep host | awk '{ print $2 }' | sed 's/-/_/g')
  60 case "$ENV_TARGET" in
  61         "x86_64"*)
  62                 export RUSTFLAGS="$BASE_RUSTFLAGS -C target-cpu=sandybridge"
  63                 export CFLAGS_$ENV_TARGET="$BASE_CFLAGS -march=sandybridge -mcpu=sandybridge -mtune=sandybridge"
  64                 ;;
  65         *)
  66                 # Assume this isn't targeted at another host and build for the host's CPU.
  67                 export RUSTFLAGS="$BASE_RUSTFLAGS -C target-cpu=native"
  68                 export CFLAGS_$ENV_TARGET="$BASE_CFLAGS -mcpu=native"
  69                 ;;
  70 esac
  71
  72 # First build the latest c-bindings-gen binary
  73 cd c-bindings-gen && cargo build --release && cd ..
  74
  75 # Then wipe all the existing C bindings (because we're being run in the right directory)
  76 # note that we keep the few manually-generated files first:
  77 mv lightning-c-bindings/src/c_types/mod.rs ./
  78 mv lightning-c-bindings/src/bitcoin ./
  79
  80 # Before we try to sed the Cargo.toml, generate version define tags
  81 # (ignoring any files that we're about to generate)
  82
  83 git checkout lightning-c-bindings/src
  84 git checkout lightning-c-bindings/include
  85 BINDINGS_GIT="$(git describe --tag --dirty --abbrev=16)"
  86 echo -e "#ifndef _LDK_HEADER_VER" > lightning-c-bindings/include/ldk_ver.h
  87 echo -e "static inline int _ldk_strncmp(const char *s1, const char *s2, uint64_t n) {" >> lightning-c-bindings/include/ldk_ver.h
  88 echo -e "\tif (n && *s1 != *s2) return 1;" >> lightning-c-bindings/include/ldk_ver.h
  89 echo -e "\twhile (n && *s1 != 0 && *s2 != 0) {" >> lightning-c-bindings/include/ldk_ver.h
  90 echo -e "\t\ts1++; s2++; n--;" >> lightning-c-bindings/include/ldk_ver.h
  91 echo -e "\t\tif (n && *s1 != *s2) return 1;" >> lightning-c-bindings/include/ldk_ver.h
  92 echo -e "\t}" >> lightning-c-bindings/include/ldk_ver.h
  93 echo -e "\treturn 0;" >> lightning-c-bindings/include/ldk_ver.h
  94 echo -e "}" >> lightning-c-bindings/include/ldk_ver.h
  95 echo -e "" >> lightning-c-bindings/include/ldk_ver.h
  96 echo -e "#define _LDK_HEADER_VER \"$LIGHTNING_GIT\"" >> lightning-c-bindings/include/ldk_ver.h
  97 echo -e "#define _LDK_C_BINDINGS_HEADER_VER \"$BINDINGS_GIT\"" >> lightning-c-bindings/include/ldk_ver.h
  98 echo -e "static inline const char* check_get_ldk_version() {" >> lightning-c-bindings/include/ldk_ver.h
  99 echo -e "\tLDKStr bin_ver = _ldk_get_compiled_version();" >> lightning-c-bindings/include/ldk_ver.h
 100 echo -e "\tif (_ldk_strncmp(_LDK_HEADER_VER, (const char*)bin_ver.chars, bin_ver.len) != 0) {" >> lightning-c-bindings/include/ldk_ver.h
 101 echo -e "\t// Version mismatch, we don't know what we're running!" >> lightning-c-bindings/include/ldk_ver.h
 102 echo -e "\t\treturn 0;" >> lightning-c-bindings/include/ldk_ver.h
 103 echo -e "\t}" >> lightning-c-bindings/include/ldk_ver.h
 104 echo -e "\treturn _LDK_HEADER_VER;" >> lightning-c-bindings/include/ldk_ver.h
 105 echo -e "}" >> lightning-c-bindings/include/ldk_ver.h
 106 echo -e "static inline const char* check_get_ldk_bindings_version() {" >> lightning-c-bindings/include/ldk_ver.h
 107 echo -e "\tLDKStr bin_ver = _ldk_c_bindings_get_compiled_version();" >> lightning-c-bindings/include/ldk_ver.h
 108 echo -e "\tif (_ldk_strncmp(_LDK_C_BINDINGS_HEADER_VER, (const char*)bin_ver.chars, bin_ver.len) != 0) {" >> lightning-c-bindings/include/ldk_ver.h
 109 echo -e "\t// Version mismatch, we don't know what we're running!" >> lightning-c-bindings/include/ldk_ver.h
 110 echo -e "\t\treturn 0;" >> lightning-c-bindings/include/ldk_ver.h
 111 echo -e "\t}" >> lightning-c-bindings/include/ldk_ver.h
 112 echo -e "\treturn _LDK_C_BINDINGS_HEADER_VER;" >> lightning-c-bindings/include/ldk_ver.h
 113 echo -e "}" >> lightning-c-bindings/include/ldk_ver.h
 114 echo -e "#endif /* _LDK_HEADER_VER */" >> lightning-c-bindings/include/ldk_ver.h
 115
 116 rm -rf lightning-c-bindings/src
 117
 118 mkdir -p lightning-c-bindings/src/{c_types,lightning}
 119 mv ./mod.rs lightning-c-bindings/src/c_types/
 120 mv ./bitcoin lightning-c-bindings/src/
 121
 122 # Finally, run the c-bindings-gen binary, building fresh bindings.
 123 OUT="$(pwd)/lightning-c-bindings/src"
 124 OUT_TEMPL="$(pwd)/lightning-c-bindings/src/c_types/derived.rs"
 125 OUT_F="$(pwd)/lightning-c-bindings/include/ldk_rust_types.h"
 126 OUT_CPP="$(pwd)/lightning-c-bindings/include/lightningpp.hpp"
 127 BIN="$(pwd)/c-bindings-gen/target/release/c-bindings-gen"
 128
 129 function add_crate() {
 130         pushd "$LIGHTNING_PATH/$1"
 131         RUSTC_BOOTSTRAP=1 cargo rustc --profile=check $3 -- -Zunstable-options --pretty=expanded > /tmp/$1-crate-source.txt
 132         popd
 133         if [ "$HOST_PLATFORM" = "host: x86_64-apple-darwin" ]; then
 134                 sed -i".original" "1i\\
 135 pub mod $2 {
 136 " /tmp/$1-crate-source.txt
 137         else
 138                 sed -i "1ipub mod $2 {\n" /tmp/$1-crate-source.txt
 139         fi
 140         echo "}" >> /tmp/$1-crate-source.txt
 141         cat /tmp/$1-crate-source.txt >> /tmp/crate-source.txt
 142         rm /tmp/$1-crate-source.txt
 143         if [ "$HOST_PLATFORM" = "host: x86_64-apple-darwin" ]; then
 144                 # OSX sed is for some reason not compatible with GNU sed
 145                 sed -E -i '' 's|#?'$1' = \{ .*|'$1' = \{ path = "'"$LIGHTNING_PATH"'/'$1'" '"$4"' }|' lightning-c-bindings/Cargo.toml
 146         else
 147                 sed -E -i 's|#?'$1' = \{ .*|'$1' = \{ path = "'"$LIGHTNING_PATH"'/'$1'" '"$4"' }|' lightning-c-bindings/Cargo.toml
 148         fi
 149 }
 150
 151 function drop_crate() {
 152         if [ "$HOST_PLATFORM" = "host: x86_64-apple-darwin" ]; then
 153                 # OSX sed is for some reason not compatible with GNU sed
 154                 sed -E -i '' 's|'$1' = \{ (.*)|#'$1' = \{ \1|' lightning-c-bindings/Cargo.toml
 155         else
 156                 sed -E -i 's|'$1' = \{ (.*)|#'$1' = \{ \1|' lightning-c-bindings/Cargo.toml
 157         fi
 158 }
 159
 160 echo > /tmp/crate-source.txt
 161 if [ "$2" = "true" ]; then
 162         add_crate lightning lightning --features=allow_wallclock_use ', features = ["allow_wallclock_use"]'
 163         add_crate "lightning-persister" "lightning_persister"
 164         add_crate "lightning-background-processor" "lightning_background_processor"
 165 else
 166         add_crate lightning lightning
 167         drop_crate "lightning-persister"
 168         drop_crate "lightning-background-processor"
 169 fi
 170 add_crate "lightning-invoice" "lightning_invoice"
 171
 172 cat /tmp/crate-source.txt | RUST_BACKTRACE=1 "$BIN" "$OUT/" "$OUT_TEMPL" "$OUT_F" "$OUT_CPP"
 173
 174 echo -e '#[no_mangle]' >> lightning-c-bindings/src/version.rs
 175 echo -e 'pub extern "C" fn _ldk_get_compiled_version() -> crate::c_types::Str {' >> lightning-c-bindings/src/version.rs
 176 echo -e '\t"'"$LIGHTNING_GIT"'".into()' >> lightning-c-bindings/src/version.rs
 177 echo -e '}' >> lightning-c-bindings/src/version.rs
 178 echo -e '#[no_mangle]' >> lightning-c-bindings/src/version.rs
 179 echo -e 'pub extern "C" fn _ldk_c_bindings_get_compiled_version() -> crate::c_types::Str {' >> lightning-c-bindings/src/version.rs
 180 echo -e '\t"'"$BINDINGS_GIT"'".into()' >> lightning-c-bindings/src/version.rs
 181 echo -e '}' >> lightning-c-bindings/src/version.rs
 182
 183 # Now cd to lightning-c-bindings, build the generated bindings, and call cbindgen to build a C header file
 184 cd lightning-c-bindings
 185
 186 RUSTFLAGS="$RUSTFLAGS --cfg=test_mod_pointers" cargo build
 187 if [ "$CFLAGS_aarch64_apple_darwin" != "" ]; then
 188         RUSTFLAGS="$BASE_RUSTFLAGS -C target-cpu=apple-a14" cargo build --target aarch64-apple-darwin
 189 fi
 190 cbindgen -v --config cbindgen.toml -o include/lightning.h >/dev/null 2>&1
 191
 192 # cbindgen is relatively braindead when exporting typedefs -
 193 # it happily exports all our typedefs for private types, even with the
 194 # generics we specified in C mode! So we drop all those types manually here.
 195 if [ "$HOST_PLATFORM" = "host: x86_64-apple-darwin" ]; then
 196         # OSX sed is for some reason not compatible with GNU sed
 197         sed -i '' 's/typedef LDKnative.*Import.*LDKnative.*;//g' include/lightning.h
 198
 199         # stdlib.h doesn't exist in clang's wasm sysroot, and cbindgen
 200         # doesn't actually use it anyway, so drop the import.
 201         sed -i '' 's/#include <stdlib.h>/#include "ldk_rust_types.h"/g' include/lightning.h
 202 else
 203         sed -i 's/typedef LDKnative.*Import.*LDKnative.*;//g' include/lightning.h
 204
 205         # stdlib.h doesn't exist in clang's wasm sysroot, and cbindgen
 206         # doesn't actually use it anyway, so drop the import.
 207         sed -i 's/#include <stdlib.h>/#include "ldk_rust_types.h"/g' include/lightning.h
 208 fi
 209
 210 # Build C++ class methods which call trait methods
 211 set +x # Echoing every command is very verbose here
 212 OLD_IFS="$IFS"
 213 export IFS=''
 214 echo '#include <string.h>' > include/lightningpp_new.hpp
 215 echo 'namespace LDK {' >> include/lightningpp_new.hpp
 216 echo '// Forward declarations' >> include/lightningpp_new.hpp
 217 cat include/lightningpp.hpp | sed -n 's/class \(.*\) {/class \1;/p' >> include/lightningpp_new.hpp
 218 echo '' >> include/lightningpp_new.hpp
 219
 220 DECLS=""
 221 while read LINE; do
 222         case "$LINE" in
 223                 "#include <string.h>")
 224                         # We already printed this above.
 225                         ;;
 226                 "namespace LDK {")
 227                         # We already printed this above.
 228                         ;;
 229                 "}")
 230                         # We'll print this at the end
 231                         ;;
 232                 "XXX"*)
 233                         STRUCT_NAME="$(echo "$LINE" | awk '{ print $2 }')"
 234                         METHOD_NAME="$(echo "$LINE" | awk '{ print $3 }')"
 235                         STRUCT_CONTENTS="$(cat include/lightning.h  | sed -n -e "/struct LDK$STRUCT_NAME/{:s" -e "/\} LDK$STRUCT_NAME;/!{N" -e "b s" -e "}" -e p -e "}")"
 236                         METHOD="$(echo "$STRUCT_CONTENTS" | grep "(\*$METHOD_NAME)")"
 237                         if [ "$METHOD" = "" ]; then
 238                                 echo "Unable to find method declaration for $LINE"
 239                                 exit 1
 240                         fi
 241                         RETVAL="$(echo "$METHOD" | sed 's/[ ]*\([A-Za-z0-9 _]*\)(\*\(.*\)).*/\1/' | sed 's/^struct LDK/LDK::/g' | tr -d ' ')"
 242                         [ "$RETVAL" = "LDK::SecretKey" ] && RETVAL="LDKSecretKey"
 243                         [ "$RETVAL" = "LDK::PublicKey" ] && RETVAL="LDKPublicKey"
 244                         [ "$RETVAL" = "LDK::ThirtyTwoBytes" ] && RETVAL="LDKThirtyTwoBytes"
 245                         PARAMS="$(echo "$METHOD" | sed 's/.*(\*.*)(\(const \)*void \*this_arg\(, \)*\(.*\));/\3/')"
 246
 247                         echo -e "\tinline $RETVAL $METHOD_NAME($PARAMS);" >> include/lightningpp_new.hpp
 248                         DECLS="$DECLS"$'\n'"inline $RETVAL $STRUCT_NAME::$METHOD_NAME($PARAMS) {"
 249
 250                         DECLS="$DECLS"$'\n'$'\t'
 251                         [ "$RETVAL" != "void" ] && DECLS="$DECLS$RETVAL ret = "
 252                         DECLS="$DECLS(self.$METHOD_NAME)(self.this_arg"
 253
 254                         IFS=','; for PARAM in $PARAMS; do
 255                                 DECLS="$DECLS, "
 256                                 DECLS="$DECLS$(echo $PARAM | sed 's/.* (*\**\([a-zA-Z0-9_]*\)\()[\[0-9\]*]\)*/\1/')"
 257                         done
 258                         IFS=''
 259
 260                         DECLS="$DECLS);"
 261                         [ "$RETVAL" != "void" ] && DECLS="$DECLS"$'\n'$'\t'"return ret;"
 262                         DECLS="$DECLS"$'\n'"}"
 263                         ;;
 264                 *)
 265                         echo "$LINE" >> include/lightningpp_new.hpp
 266         esac
 267 done < include/lightningpp.hpp
 268 echo "$DECLS" >> include/lightningpp_new.hpp
 269 echo "}" >> include/lightningpp_new.hpp
 270 export IFS="$OLD_IFS"
 271 set -x
 272 mv include/lightningpp_new.hpp include/lightningpp.hpp
 273
 274 # Finally, sanity-check the generated C and C++ bindings with demo apps:
 275 # Naively run the C demo app:
 276 gcc $LOCAL_CFLAGS -Wall -g -pthread demo.c target/debug/libldk.a -ldl
 277 ./a.out
 278
 279 # And run the C++ demo app
 280 g++ $LOCAL_CFLAGS -std=c++11 -Wall -g -pthread demo.cpp -Ltarget/debug/ -lldk -ldl
 281 LD_LIBRARY_PATH=target/debug/ ./a.out > /dev/null
 282
 283 # Finally, run the C++ demo app with our native networking library
 284 # in valgrind to test memory model correctness and lack of leaks.
 285 gcc $LOCAL_CFLAGS -fPIC -std=c99 -Wall -g -pthread -I../ldk-net ../ldk-net/ldk_net.c -c -o ldk_net.o
 286 g++ $LOCAL_CFLAGS -std=c++11 -Wall -g -pthread -DREAL_NET -I../ldk-net ldk_net.o demo.cpp target/debug/libldk.a -ldl
 287 if [ -x "`which valgrind`" ]; then
 288         valgrind --error-exitcode=4 --memcheck:leak-check=full --show-leak-kinds=all ./a.out
 289         echo
 290 else
 291         echo "WARNING: Please install valgrind for more testing"
 292         ./a.out
 293 fi
 294
 295
 296 # Test a statically-linked C++ version, tracking the resulting binary size and runtime
 297 # across debug, LTO, and cross-language LTO builds (using the same compiler each time).
 298 clang++ $LOCAL_CFLAGS -std=c++11 demo.cpp target/debug/libldk.a -ldl
 299 strip ./a.out
 300 echo " C++ Bin size and runtime w/o optimization:"
 301 ls -lha a.out
 302 time ./a.out > /dev/null
 303
 304 # Then, check with memory sanitizer, if we're on Linux and have rustc nightly
 305 if [ "$HOST_PLATFORM" = "host: x86_64-unknown-linux-gnu" ]; then
 306         if cargo +nightly --version >/dev/null 2>&1; then
 307                 LLVM_V=$(rustc +nightly --version --verbose | grep "LLVM version" | awk '{ print substr($3, 0, 2); }')
 308                 if [ -x "$(which clang-$LLVM_V)" ]; then
 309                         cargo +nightly clean
 310                         cargo +nightly rustc -Zbuild-std=std,panic_abort --target x86_64-unknown-linux-gnu -v -- -Zsanitizer=memory -Zsanitizer-memory-track-origins -Cforce-frame-pointers=yes
 311                         mv target/x86_64-unknown-linux-gnu/debug/libldk.* target/debug/
 312
 313                         # Sadly, std doesn't seem to compile into something that is memsan-safe as of Aug 2020,
 314                         # so we'll always fail, not to mention we may be linking against git rustc LLVM which
 315                         # may differ from clang-llvm, so just allow everything here to fail.
 316                         set +e
 317
 318                         # First the C demo app...
 319                         clang-$LLVM_V $LOCAL_CFLAGS -fsanitize=memory -fsanitize-memory-track-origins -g demo.c target/debug/libldk.a -ldl
 320                         ./a.out
 321
 322                         # ...then the C++ demo app
 323                         clang++-$LLVM_V $LOCAL_CFLAGS -std=c++11 -fsanitize=memory -fsanitize-memory-track-origins -g demo.cpp target/debug/libldk.a -ldl
 324                         ./a.out >/dev/null
 325
 326                         # ...then the C++ demo app with the ldk_net network implementation
 327                         clang-$LLVM_V $LOCAL_CFLAGS -std=c99 -fsanitize=memory -fsanitize-memory-track-origins -g -I../ldk-net ../ldk-net/ldk_net.c -c -o ldk_net.o
 328                         clang++-$LLVM_V $LOCAL_CFLAGS -std=c++11 -fsanitize=memory -fsanitize-memory-track-origins -g -DREAL_NET -I../ldk-net ldk_net.o demo.cpp target/debug/libldk.a -ldl
 329                         ./a.out >/dev/null
 330
 331                         # restore exit-on-failure
 332                         set -e
 333                 else
 334                         echo "WARNING: Can't use memory sanitizer without clang-$LLVM_V"
 335                 fi
 336         else
 337                 echo "WARNING: Can't use memory sanitizer without rustc nightly"
 338         fi
 339 else
 340         echo "WARNING: Can't use memory sanitizer on non-Linux, non-x86 platforms"
 341 fi
 342
 343 RUSTC_LLVM_V=$(rustc --version --verbose | grep "LLVM version" | awk '{ print substr($3, 0, 2); }')
 344
 345 if [ "$HOST_PLATFORM" = "host: x86_64-apple-darwin" ]; then
 346         # Apple is special, as always, and their versions of clang aren't
 347         # compatible with upstream LLVM.
 348         if [ "$(clang --version | grep 'Apple clang')" != "" ]; then
 349                 echo "Apple clang isn't compatible with upstream clang, install upstream clang"
 350                 CLANG_LLVM_V="0"
 351         else
 352                 CLANG_LLVM_V=$(clang --version | head -n1 | awk '{ print substr($4, 0, 2); }')
 353                 if [ -x "$(which ld64.lld)" ]; then
 354                         LLD_LLVM_V="$(ld64.lld --version | awk '{ print substr($2, 0, 2); }')"
 355                 fi
 356         fi
 357 else
 358         CLANG_LLVM_V=$(clang --version | head -n1 | awk '{ print substr($4, 0, 2); }')
 359         if [ -x "$(which ld.lld)" ]; then
 360                 LLD_LLVM_V="$(ld.lld --version | awk '{ print substr($2, 0, 2); }')"
 361         fi
 362 fi
 363
 364
 365 if [ "$CLANG_LLVM_V" = "$RUSTC_LLVM_V" ]; then
 366         CLANG=clang
 367         CLANGPP=clang++
 368         if [ "$LLD_LLVM_V" = "$CLANG_LLVM_V" ]; then
 369                 LLD=lld
 370         fi
 371 elif [ -x "$(which clang-$RUSTC_LLVM_V)" ]; then
 372         CLANG="$(which clang-$RUSTC_LLVM_V)"
 373         CLANGPP="$(which clang++-$RUSTC_LLVM_V || echo clang++)"
 374         if [ "$($CLANG --version)" != "$($CLANGPP --version)" ]; then
 375                 echo "$CLANG and $CLANGPP are not the same version of clang!"
 376                 unset CLANG
 377                 unset CLANGPP
 378         fi
 379         if [ "$LLD_LLVM_V" != "$RUSTC_LLVM_V" ]; then
 380                 LLD="$(which lld-$RUSTC_LLVM_V || echo lld)"
 381                 LLD_LLVM_V="$(ld.$LLD --version | awk '{ print substr($2, 0, 2); }')"
 382                 if [ "$LLD_LLVM_V" != "$RUSTC_LLVM_V" ]; then
 383                         echo "Could not find a workable version of lld, not using cross-language LTO"
 384                         unset LLD
 385                 fi
 386         fi
 387 fi
 388
 389 if [ "$CLANG" != "" -a "$CLANGPP" = "" ]; then
 390         echo "WARNING: It appears you have a clang-$RUSTC_LLVM_V but not clang++-$RUSTC_LLVM_V. This is common, but leaves us unable to compile C++ with LLVM $RUSTC_LLVM_V"
 391         echo "You should create a symlink called clang++-$RUSTC_LLVM_V pointing to $CLANG in $(dirname $CLANG)"
 392 fi
 393
 394 # Finally, if we're on OSX or on Linux, build the final debug binary with address sanitizer (and leave it there)
 395 if [ "$HOST_PLATFORM" = "host: x86_64-unknown-linux-gnu" -o "$HOST_PLATFORM" = "host: x86_64-apple-darwin" ]; then
 396         if [ "$CLANGPP" != "" ]; then
 397                 if [ "$HOST_PLATFORM" = "host: x86_64-apple-darwin" ]; then
 398                         # OSX sed is for some reason not compatible with GNU sed
 399                         sed -i .bk 's/,"cdylib"]/]/g' Cargo.toml
 400                 else
 401                         sed -i.bk 's/,"cdylib"]/]/g' Cargo.toml
 402                 fi
 403                 if [ "$CFLAGS_aarch64_apple_darwin" != "" ]; then
 404                         RUSTFLAGS="$BASE_RUSTFLAGS -C target-cpu=apple-a14" RUSTC_BOOTSTRAP=1 cargo rustc --target aarch64-apple-darwin -v -- -Zsanitizer=address -Cforce-frame-pointers=yes || ( mv Cargo.toml.bk Cargo.toml; exit 1)
 405                 fi
 406                 RUSTFLAGS="$RUSTFLAGS --cfg=test_mod_pointers" RUSTC_BOOTSTRAP=1 cargo rustc -v -- -Zsanitizer=address -Cforce-frame-pointers=yes || ( mv Cargo.toml.bk Cargo.toml; exit 1)
 407                 mv Cargo.toml.bk Cargo.toml
 408
 409                 # First the C demo app...
 410                 $CLANG $LOCAL_CFLAGS -fsanitize=address -g demo.c target/debug/libldk.a -ldl
 411                 ASAN_OPTIONS='detect_leaks=1 detect_invalid_pointer_pairs=1 detect_stack_use_after_return=1' ./a.out
 412
 413                 # ...then the C++ demo app
 414                 $CLANGPP $LOCAL_CFLAGS -std=c++11 -fsanitize=address -g demo.cpp target/debug/libldk.a -ldl
 415                 ASAN_OPTIONS='detect_leaks=1 detect_invalid_pointer_pairs=1 detect_stack_use_after_return=1' ./a.out >/dev/null
 416
 417                 # ...then the C++ demo app with the ldk_net network implementation
 418                 $CLANG $LOCAL_CFLAGS -fPIC -fsanitize=address -g -I../ldk-net ../ldk-net/ldk_net.c -c -o ldk_net.o
 419                 $CLANGPP $LOCAL_CFLAGS -std=c++11 -fsanitize=address -g -DREAL_NET -I../ldk-net ldk_net.o demo.cpp target/debug/libldk.a -ldl
 420                 ASAN_OPTIONS='detect_leaks=1 detect_invalid_pointer_pairs=1 detect_stack_use_after_return=1' ./a.out >/dev/null
 421         else
 422                 echo "WARNING: Please install clang-$RUSTC_LLVM_V and clang++-$RUSTC_LLVM_V to build with address sanitizer"
 423         fi
 424 else
 425         echo "WARNING: Can't use address sanitizer on non-Linux, non-OSX non-x86 platforms"
 426 fi
 427
 428 # Now build with LTO on on both C++ and rust, but without cross-language LTO:
 429 # Clear stale release build artifacts from previous runs
 430 cargo clean --release
 431 CARGO_PROFILE_RELEASE_LTO=true cargo rustc -v --release -- -C lto
 432 clang++ $LOCAL_CFLAGS -std=c++11 -O2 demo.cpp target/release/libldk.a -ldl
 433
 434 strip ./a.out
 435 echo "C++ Bin size and runtime with only RL (LTO) optimized:"
 436 ls -lha a.out
 437 time ./a.out > /dev/null
 438
 439 if [ "$HOST_PLATFORM" != "host: x86_64-apple-darwin" -a "$CLANGPP" != "" ]; then
 440         # If we can use cross-language LTO, use it for building C dependencies (i.e. libsecp256k1) as well
 441         export CC="$CLANG"
 442         # The cc-rs crate tries to force -fdata-sections and -ffunction-sections on, which
 443         # breaks -fembed-bitcode, so we turn off cc-rs' default flags and specify exactly
 444         # what we want here.
 445         export CFLAGS_$ENV_TARGET="$BASE_CFLAGS -fPIC -fembed-bitcode -march=sandybridge"
 446         export CRATE_CC_NO_DEFAULTS=true
 447 fi
 448
 449 if [ "$2" = "false" -a "$(rustc --print target-list | grep wasm32-wasi)" != "" ]; then
 450         # Test to see if clang supports wasm32 as a target (which is needed to build rust-secp256k1)
 451         echo "int main() {}" > genbindings_wasm_test_file.c
 452         if clang -nostdlib -o /dev/null --target=wasm32-wasi -Wl,--no-entry genbindings_wasm_test_file.c > /dev/null 2>&1; then
 453                 # And if it does, build a WASM binary without capturing errors
 454                 export CFLAGS_wasm32_wasi="$BASE_CFLAGS -target wasm32"
 455                 cargo rustc -v --target=wasm32-wasi
 456                 export CFLAGS_wasm32_wasi="$BASE_CFLAGS -target wasm32 -Os"
 457                 CARGO_PROFILE_RELEASE_LTO=true cargo rustc -v --release --target=wasm32-wasi -- -C embed-bitcode=yes -C opt-level=s -C linker-plugin-lto -C lto
 458         else
 459                 echo "Cannot build WASM lib as clang does not seem to support the wasm32-wasi target"
 460         fi
 461         rm genbindings_wasm_test_file.c
 462 fi
 463
 464 EXTRA_TARGETS=( $LDK_C_BINDINGS_EXTRA_TARGETS )
 465 EXTRA_CCS=( $LDK_C_BINDINGS_EXTRA_TARGET_CCS )
 466
 467 if [ ${#EXTRA_TARGETS[@]} != ${#EXTRA_CCS[@]} ]; then
 468         echo "LDK_C_BINDINGS_EXTRA_TARGETS and LDK_C_BINDINGS_EXTRA_TARGET_CCS didn't have the same number of elements!"
 469         exit 1
 470 fi
 471
 472 for IDX in ${!EXTRA_TARGETS[@]}; do
 473         EXTRA_ENV_TARGET=$(echo "${EXTRA_TARGETS[$IDX]}" | sed 's/-/_/g')
 474         export CFLAGS_$EXTRA_ENV_TARGET="$BASE_CFLAGS"
 475         export CC_$EXTRA_ENV_TARGET=${EXTRA_CCS[$IDX]}
 476         RUSTFLAGS="$BASE_RUSTFLAGS -C linker=${EXTRA_CCS[$IDX]}" CARGO_PROFILE_RELEASE_LTO=true cargo rustc -v --release --target "${EXTRA_TARGETS[$IDX]}" -- -C lto
 477 done
 478
 479 if [ "$CFLAGS_aarch64_apple_darwin" != "" ]; then
 480         RUSTFLAGS="$BASE_RUSTFLAGS -C target-cpu=apple-a14" CARGO_PROFILE_RELEASE_LTO=true cargo rustc -v --release --target aarch64-apple-darwin -- -C lto
 481 fi
 482
 483 if [ "$HOST_PLATFORM" != "host: x86_64-apple-darwin" -a "$CLANGPP" != "" -a "$LLD" != "" ]; then
 484         # Finally, test cross-language LTO. Note that this will fail if rustc and clang++
 485         # build against different versions of LLVM (eg when rustc is installed via rustup
 486         # or Ubuntu packages). This should work fine on Distros which do more involved
 487         # packaging than simply shipping the rustup binaries (eg Debian should Just Work
 488         # here).
 489         export CFLAGS_$ENV_TARGET="$BASE_CFLAGS -O3 -fPIC -fembed-bitcode -march=sandybridge"
 490         # Rust doesn't recognize CFLAGS changes, so we need to clean build artifacts
 491         cargo clean --release
 492         CARGO_PROFILE_RELEASE_LTO=true cargo rustc -v --release -- -C linker-plugin-lto -C lto -C linker=$CLANG -C link-arg=-fuse-ld=$LLD
 493         $CLANGPP $LOCAL_CFLAGS -flto -fuse-ld=lld -O2 demo.cpp target/release/libldk.a -ldl
 494         strip ./a.out
 495         echo "C++ Bin size and runtime with cross-language LTO:"
 496         ls -lha a.out
 497         time ./a.out > /dev/null
 498 else
 499         echo "WARNING: Building with cross-language LTO is not avilable on OSX or without clang-$RUSTC_LLVM_V"
 500 fi