_ 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 -- -Zunpretty=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 "$LINE" in
 223                 "#include <string.h>")
 224                         # We already printed this above.
 225                         ;;
 226                 "namespace LDK {")
 227                         # We already printed this above.
 228                         ;;
 229                 "}")
 230                         # We'll print this at the end
 231                         ;;
 232                 "XXX"*)
 233                         NEW_STRUCT_NAME="$(echo "$LINE" | awk '{ print $2 }')"
 234                         if [ "$NEW_STRUCT_NAME" != "$STRUCT_NAME" ]; then
 235                                 STRUCT_CONTENTS="$(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 "}")"
 236                         fi
 237                         STRUCT_NAME="$NEW_STRUCT_NAME"
 238                         METHOD_NAME="$(echo "$LINE" | awk '{ print $3 }')"
 239                         METHOD="$(echo "$STRUCT_CONTENTS" | grep "(\*$METHOD_NAME)")"
 240                         if [ "$METHOD" = "" ]; then
 241                                 echo "Unable to find method declaration for $LINE"
 242                                 exit 1
 243                         fi
 244                         RETVAL="$(echo "$METHOD" | sed 's/[ ]*\([A-Za-z0-9 _]*\)(\*\(.*\)).*/\1/' | sed 's/^struct LDK/LDK::/g' | tr -d ' ')"
 245                         [ "$RETVAL" = "LDK::SecretKey" ] && RETVAL="LDKSecretKey"
 246                         [ "$RETVAL" = "LDK::PublicKey" ] && RETVAL="LDKPublicKey"
 247                         [ "$RETVAL" = "LDK::ThirtyTwoBytes" ] && RETVAL="LDKThirtyTwoBytes"
 248                         PARAMS="$(echo "$METHOD" | sed 's/.*(\*.*)(\(const \)*void \*this_arg\(, \)*\(.*\));/\3/')"
 249
 250                         echo -e "\tinline $RETVAL $METHOD_NAME($PARAMS);" >> include/lightningpp_new.hpp
 251                         DECLS="$DECLS"$'\n'"inline $RETVAL $STRUCT_NAME::$METHOD_NAME($PARAMS) {"
 252
 253                         DECLS="$DECLS"$'\n'$'\t'
 254                         [ "$RETVAL" != "void" ] && DECLS="$DECLS$RETVAL ret = "
 255                         DECLS="$DECLS(self.$METHOD_NAME)(self.this_arg"
 256
 257                         IFS=','; for PARAM in $PARAMS; do
 258                                 DECLS="$DECLS, "
 259                                 DECLS="$DECLS$(echo $PARAM | sed 's/.* (*\**\([a-zA-Z0-9_]*\)\()[\[0-9\]*]\)*/\1/')"
 260                         done
 261                         IFS=''
 262
 263                         DECLS="$DECLS);"
 264                         [ "$RETVAL" != "void" ] && DECLS="$DECLS"$'\n'$'\t'"return ret;"
 265                         DECLS="$DECLS"$'\n'"}"
 266                         ;;
 267                 *)
 268                         echo "$LINE" >> include/lightningpp_new.hpp
 269         esac
 270 done < include/lightningpp.hpp
 271 echo "$DECLS" >> include/lightningpp_new.hpp
 272 echo "}" >> include/lightningpp_new.hpp
 273 export IFS="$OLD_IFS"
 274 set -x
 275 mv include/lightningpp_new.hpp include/lightningpp.hpp
 276
 277 # Finally, sanity-check the generated C and C++ bindings with demo apps:
 278 # Naively run the C demo app:
 279 gcc $LOCAL_CFLAGS -Wall -g -pthread demo.c target/debug/libldk.a -ldl -lm
 280 ./a.out
 281
 282 # And run the C++ demo app
 283 g++ $LOCAL_CFLAGS -std=c++11 -Wall -g -pthread demo.cpp -Ltarget/debug/ -lldk -ldl
 284 LD_LIBRARY_PATH=target/debug/ ./a.out > /dev/null
 285
 286 # Finally, run the C++ demo app with our native networking library
 287 # in valgrind to test memory model correctness and lack of leaks.
 288 gcc $LOCAL_CFLAGS -fPIC -std=c99 -Wall -g -pthread -I../ldk-net ../ldk-net/ldk_net.c -c -o ldk_net.o
 289 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
 290 if [ -x "`which valgrind`" ]; then
 291         valgrind --error-exitcode=4 --memcheck:leak-check=full --show-leak-kinds=all ./a.out
 292         echo
 293 else
 294         echo "WARNING: Please install valgrind for more testing"
 295         ./a.out
 296 fi
 297
 298
 299 # Test a statically-linked C++ version, tracking the resulting binary size and runtime
 300 # across debug, LTO, and cross-language LTO builds (using the same compiler each time).
 301 clang++ $LOCAL_CFLAGS -std=c++11 demo.cpp target/debug/libldk.a -ldl
 302 strip ./a.out
 303 echo " C++ Bin size and runtime w/o optimization:"
 304 ls -lha a.out
 305 time ./a.out > /dev/null
 306
 307 # Then, check with memory sanitizer, if we're on Linux and have rustc nightly
 308 if [ "$HOST_PLATFORM" = "host: x86_64-unknown-linux-gnu" ]; then
 309         if cargo +nightly --version >/dev/null 2>&1; then
 310                 LLVM_V=$(rustc +nightly --version --verbose | grep "LLVM version" | awk '{ print substr($3, 0, 2); }')
 311                 if [ -x "$(which clang-$LLVM_V)" ]; then
 312                         cargo +nightly clean
 313                         cargo +nightly rustc -Zbuild-std=std,panic_abort --target x86_64-unknown-linux-gnu -v -- -Zsanitizer=memory -Zsanitizer-memory-track-origins -Cforce-frame-pointers=yes
 314                         mv target/x86_64-unknown-linux-gnu/debug/libldk.* target/debug/
 315
 316                         # Sadly, std doesn't seem to compile into something that is memsan-safe as of Aug 2020,
 317                         # so we'll always fail, not to mention we may be linking against git rustc LLVM which
 318                         # may differ from clang-llvm, so just allow everything here to fail.
 319                         set +e
 320
 321                         # First the C demo app...
 322                         clang-$LLVM_V $LOCAL_CFLAGS -fsanitize=memory -fsanitize-memory-track-origins -g demo.c target/debug/libldk.a -ldl
 323                         ./a.out
 324
 325                         # ...then the C++ demo app
 326                         clang++-$LLVM_V $LOCAL_CFLAGS -std=c++11 -fsanitize=memory -fsanitize-memory-track-origins -g demo.cpp target/debug/libldk.a -ldl
 327                         ./a.out >/dev/null
 328
 329                         # ...then the C++ demo app with the ldk_net network implementation
 330                         clang-$LLVM_V $LOCAL_CFLAGS -std=c99 -fsanitize=memory -fsanitize-memory-track-origins -g -I../ldk-net ../ldk-net/ldk_net.c -c -o ldk_net.o
 331                         clang++-$LLVM_V $LOCAL_CFLAGS -std=c++11 -fsanitize=memory -fsanitize-memory-track-origins -g -DREAL_NET -I../ldk-net ldk_net.o demo.cpp target/debug/libldk.a -ldl
 332                         ./a.out >/dev/null
 333
 334                         # restore exit-on-failure
 335                         set -e
 336                 else
 337                         echo "WARNING: Can't use memory sanitizer without clang-$LLVM_V"
 338                 fi
 339         else
 340                 echo "WARNING: Can't use memory sanitizer without rustc nightly"
 341         fi
 342 else
 343         echo "WARNING: Can't use memory sanitizer on non-Linux, non-x86 platforms"
 344 fi
 345
 346 RUSTC_LLVM_V=$(rustc --version --verbose | grep "LLVM version" | awk '{ print substr($3, 0, 2); }')
 347
 348 if [ "$HOST_PLATFORM" = "host: x86_64-apple-darwin" ]; then
 349         # Apple is special, as always, and their versions of clang aren't
 350         # compatible with upstream LLVM.
 351         if [ "$(clang --version | grep 'Apple clang')" != "" ]; then
 352                 echo "Apple clang isn't compatible with upstream clang, install upstream clang"
 353                 CLANG_LLVM_V="0"
 354         else
 355                 CLANG_LLVM_V=$(clang --version | head -n1 | awk '{ print substr($4, 0, 2); }')
 356                 if [ -x "$(which ld64.lld)" ]; then
 357                         LLD_LLVM_V="$(ld64.lld --version | awk '{ print substr($2, 0, 2); }')"
 358                 fi
 359         fi
 360 else
 361         CLANG_LLVM_V=$(clang --version | head -n1 | awk '{ print substr($4, 0, 2); }')
 362         if [ -x "$(which ld.lld)" ]; then
 363                 LLD_LLVM_V="$(ld.lld --version | awk '{ print substr($2, 0, 2); }')"
 364         fi
 365 fi
 366
 367
 368 if [ "$CLANG_LLVM_V" = "$RUSTC_LLVM_V" ]; then
 369         CLANG=clang
 370         CLANGPP=clang++
 371         if [ "$LLD_LLVM_V" = "$CLANG_LLVM_V" ]; then
 372                 LLD=lld
 373         fi
 374 elif [ -x "$(which clang-$RUSTC_LLVM_V)" ]; then
 375         CLANG="$(which clang-$RUSTC_LLVM_V)"
 376         CLANGPP="$(which clang++-$RUSTC_LLVM_V || echo clang++)"
 377         if [ "$($CLANG --version)" != "$($CLANGPP --version)" ]; then
 378                 echo "$CLANG and $CLANGPP are not the same version of clang!"
 379                 unset CLANG
 380                 unset CLANGPP
 381         fi
 382         if [ "$LLD_LLVM_V" != "$RUSTC_LLVM_V" ]; then
 383                 LLD="$(which lld-$RUSTC_LLVM_V || echo lld)"
 384                 LLD_LLVM_V="$(ld.$LLD --version | awk '{ print substr($2, 0, 2); }')"
 385                 if [ "$LLD_LLVM_V" != "$RUSTC_LLVM_V" ]; then
 386                         echo "Could not find a workable version of lld, not using cross-language LTO"
 387                         unset LLD
 388                 fi
 389         fi
 390 fi
 391
 392 if [ "$CLANG" != "" -a "$CLANGPP" = "" ]; then
 393         echo "WARNING: It appears you have a clang-$RUSTC_LLVM_V but not clang++-$RUSTC_LLVM_V. This is common, but leaves us unable to compile C++ with LLVM $RUSTC_LLVM_V"
 394         echo "You should create a symlink called clang++-$RUSTC_LLVM_V pointing to $CLANG in $(dirname $CLANG)"
 395 fi
 396
 397 # Finally, if we're on OSX or on Linux, build the final debug binary with address sanitizer (and leave it there)
 398 if [ "$HOST_PLATFORM" = "host: x86_64-unknown-linux-gnu" -o "$HOST_PLATFORM" = "host: x86_64-apple-darwin" ]; then
 399         if [ "$CLANGPP" != "" ]; then
 400                 if [ "$HOST_PLATFORM" = "host: x86_64-apple-darwin" ]; then
 401                         # OSX sed is for some reason not compatible with GNU sed
 402                         sed -i .bk 's/,"cdylib"]/]/g' Cargo.toml
 403                 else
 404                         sed -i.bk 's/,"cdylib"]/]/g' Cargo.toml
 405                 fi
 406                 if [ "$CFLAGS_aarch64_apple_darwin" != "" ]; then
 407                         RUSTFLAGS="$BASE_RUSTFLAGS -C target-cpu=apple-a14" RUSTC_BOOTSTRAP=1 cargo rustc --target aarch64-apple-darwin -v -- -Zsanitizer=address -Cforce-frame-pointers=yes || ( mv Cargo.toml.bk Cargo.toml; exit 1)
 408                 fi
 409                 RUSTFLAGS="$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)
 410                 mv Cargo.toml.bk Cargo.toml
 411
 412                 # First the C demo app...
 413                 $CLANG $LOCAL_CFLAGS -fsanitize=address -g demo.c target/debug/libldk.a -ldl
 414                 ASAN_OPTIONS='detect_leaks=1 detect_invalid_pointer_pairs=1 detect_stack_use_after_return=1' ./a.out
 415
 416                 # ...then the C++ demo app
 417                 $CLANGPP $LOCAL_CFLAGS -std=c++11 -fsanitize=address -g demo.cpp target/debug/libldk.a -ldl
 418                 ASAN_OPTIONS='detect_leaks=1 detect_invalid_pointer_pairs=1 detect_stack_use_after_return=1' ./a.out >/dev/null
 419
 420                 # ...then the C++ demo app with the ldk_net network implementation
 421                 $CLANG $LOCAL_CFLAGS -fPIC -fsanitize=address -g -I../ldk-net ../ldk-net/ldk_net.c -c -o ldk_net.o
 422                 $CLANGPP $LOCAL_CFLAGS -std=c++11 -fsanitize=address -g -DREAL_NET -I../ldk-net ldk_net.o demo.cpp target/debug/libldk.a -ldl
 423                 ASAN_OPTIONS='detect_leaks=1 detect_invalid_pointer_pairs=1 detect_stack_use_after_return=1' ./a.out >/dev/null
 424         else
 425                 echo "WARNING: Please install clang-$RUSTC_LLVM_V and clang++-$RUSTC_LLVM_V to build with address sanitizer"
 426         fi
 427 else
 428         echo "WARNING: Can't use address sanitizer on non-Linux, non-OSX non-x86 platforms"
 429 fi
 430
 431 # Now build with LTO on on both C++ and rust, but without cross-language LTO:
 432 # Clear stale release build artifacts from previous runs
 433 cargo clean --release
 434 CARGO_PROFILE_RELEASE_LTO=true cargo rustc -v --release -- -C lto
 435 clang++ $LOCAL_CFLAGS -std=c++11 -O2 demo.cpp target/release/libldk.a -ldl
 436
 437 strip ./a.out
 438 echo "C++ Bin size and runtime with only RL (LTO) optimized:"
 439 ls -lha a.out
 440 time ./a.out > /dev/null
 441
 442 if [ "$HOST_PLATFORM" != "host: x86_64-apple-darwin" -a "$CLANGPP" != "" ]; then
 443         # If we can use cross-language LTO, use it for building C dependencies (i.e. libsecp256k1) as well
 444         export CC="$CLANG"
 445         # The cc-rs crate tries to force -fdata-sections and -ffunction-sections on, which
 446         # breaks -fembed-bitcode, so we turn off cc-rs' default flags and specify exactly
 447         # what we want here.
 448         export CFLAGS_$ENV_TARGET="$BASE_CFLAGS -fPIC -fembed-bitcode -march=sandybridge"
 449         export CRATE_CC_NO_DEFAULTS=true
 450 fi
 451
 452 if [ "$2" = "false" -a "$(rustc --print target-list | grep wasm32-wasi)" != "" ]; then
 453         # Test to see if clang supports wasm32 as a target (which is needed to build rust-secp256k1)
 454         echo "int main() {}" > genbindings_wasm_test_file.c
 455         if clang -nostdlib -o /dev/null --target=wasm32-wasi -Wl,--no-entry genbindings_wasm_test_file.c > /dev/null 2>&1; then
 456                 # And if it does, build a WASM binary without capturing errors
 457                 export CFLAGS_wasm32_wasi="$BASE_CFLAGS -target wasm32"
 458                 cargo rustc -v --target=wasm32-wasi
 459                 export CFLAGS_wasm32_wasi="$BASE_CFLAGS -target wasm32 -Os"
 460                 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
 461         else
 462                 echo "Cannot build WASM lib as clang does not seem to support the wasm32-wasi target"
 463         fi
 464         rm genbindings_wasm_test_file.c
 465 fi
 466
 467 EXTRA_TARGETS=( $LDK_C_BINDINGS_EXTRA_TARGETS )
 468 EXTRA_CCS=( $LDK_C_BINDINGS_EXTRA_TARGET_CCS )
 469
 470 if [ ${#EXTRA_TARGETS[@]} != ${#EXTRA_CCS[@]} ]; then
 471         echo "LDK_C_BINDINGS_EXTRA_TARGETS and LDK_C_BINDINGS_EXTRA_TARGET_CCS didn't have the same number of elements!"
 472         exit 1
 473 fi
 474
 475 for IDX in ${!EXTRA_TARGETS[@]}; do
 476         EXTRA_ENV_TARGET=$(echo "${EXTRA_TARGETS[$IDX]}" | sed 's/-/_/g')
 477         export CFLAGS_$EXTRA_ENV_TARGET="$BASE_CFLAGS"
 478         export CC_$EXTRA_ENV_TARGET=${EXTRA_CCS[$IDX]}
 479         RUSTFLAGS="$BASE_RUSTFLAGS -C linker=${EXTRA_CCS[$IDX]}" CARGO_PROFILE_RELEASE_LTO=true cargo rustc -v --release --target "${EXTRA_TARGETS[$IDX]}" -- -C lto
 480 done
 481
 482 if [ "$CFLAGS_aarch64_apple_darwin" != "" ]; then
 483         RUSTFLAGS="$BASE_RUSTFLAGS -C target-cpu=apple-a14" CARGO_PROFILE_RELEASE_LTO=true cargo rustc -v --release --target aarch64-apple-darwin -- -C lto
 484 fi
 485
 486 if [ "$HOST_PLATFORM" != "host: x86_64-apple-darwin" -a "$CLANGPP" != "" -a "$LLD" != "" ]; then
 487         # Finally, test cross-language LTO. Note that this will fail if rustc and clang++
 488         # build against different versions of LLVM (eg when rustc is installed via rustup
 489         # or Ubuntu packages). This should work fine on Distros which do more involved
 490         # packaging than simply shipping the rustup binaries (eg Debian should Just Work
 491         # here).
 492         export CFLAGS_$ENV_TARGET="$BASE_CFLAGS -O3 -fPIC -fembed-bitcode -march=sandybridge"
 493         # Rust doesn't recognize CFLAGS changes, so we need to clean build artifacts
 494         cargo clean --release
 495         CARGO_PROFILE_RELEASE_LTO=true cargo rustc -v --release -- -C linker-plugin-lto -C lto -C linker=$CLANG -C link-arg=-fuse-ld=$LLD
 496         $CLANGPP $LOCAL_CFLAGS -flto -fuse-ld=lld -O2 demo.cpp target/release/libldk.a -ldl
 497         strip ./a.out
 498         echo "C++ Bin size and runtime with cross-language LTO:"
 499         ls -lha a.out
 500         time ./a.out > /dev/null
 501 else
 502         echo "WARNING: Building with cross-language LTO is not avilable on OSX or without clang-$RUSTC_LLVM_V"
 503 fi