export CFLAGS_wasm32_wasi="-target wasm32"
fi
-if [ "$(rustc --print target-list | grep wasm32-wasi)" != "" ]; then
+if [ "$2" = "false" -a "$(rustc --print target-list | grep wasm32-wasi)" != "" ]; then
# Test to see if clang supports wasm32 as a target (which is needed to build rust-secp256k1)
echo "int main() {}" > genbindings_wasm_test_file.c
clang -nostdlib -o /dev/null --target=wasm32-wasi -Wl,--no-entry genbindings_wasm_test_file.c > /dev/null 2>&1 &&
# or Ubuntu packages). This should work fine on Distros which do more involved
# packaging than simply shipping the rustup binaries (eg Debian should Just Work
# here).
- export CFLAGS="$CFLAGS -flto"
+ # The cc-rs crate tries to force -fdata-sections and -ffunction-sections on, which
+ # breaks -fembed-bitcode, so we turn off cc-rs' default flags and specify exactly
+ # what we want here.
+ export CFLAGS="$CFLAGS -O3 -fPIC -fembed-bitcode"
+ export CRATE_CC_NO_DEFAULTS=true
# Rust doesn't recognize CFLAGS changes, so we need to clean build artifacts
cargo clean --release
CARGO_PROFILE_RELEASE_LTO=true cargo rustc -v --release -- -C linker-plugin-lto -C lto -C link-arg=-fuse-ld=lld