From d8861cc16426cc3cf9809da57d55eb88871fca3d Mon Sep 17 00:00:00 2001 From: Matt Corallo Date: Sat, 15 Jan 2022 22:59:11 +0000 Subject: [PATCH] Optimize more aggressively for WASM builds Use `-Oz` instead of `-Os` because why not, and include LLVM bitcode in C dependencies. This reduces `liblightningjs_release.wasm` from 3.0MB to 2.4MB, likely mostly from removing secp256k1 symbols that were unused. --- genbindings.sh | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/genbindings.sh b/genbindings.sh index 1752286..edaa01d 100755 --- a/genbindings.sh +++ b/genbindings.sh @@ -485,10 +485,10 @@ if [ "$2" = "false" -a "$(rustc --print target-list | grep wasm32-wasi)" != "" ] echo "int main() {}" > genbindings_wasm_test_file.c if clang -nostdlib -o /dev/null --target=wasm32-wasi -Wl,--no-entry genbindings_wasm_test_file.c > /dev/null 2>&1; then # And if it does, build a WASM binary without capturing errors - export CFLAGS_wasm32_wasi="$BASE_CFLAGS -target wasm32" + export CFLAGS_wasm32_wasi="$BASE_CFLAGS -target wasm32 -O1" RUSTFLAGS="$RUSTFLAGS --cfg=test_mod_pointers" cargo rustc $CARGO_BUILD_ARGS -v --target=wasm32-wasi - export CFLAGS_wasm32_wasi="$BASE_CFLAGS -target wasm32 -Os" - CARGO_PROFILE_RELEASE_LTO=true cargo rustc $CARGO_BUILD_ARGS -v --release --target=wasm32-wasi -- -C embed-bitcode=yes -C opt-level=s -C linker-plugin-lto -C lto + export CFLAGS_wasm32_wasi="$BASE_CFLAGS -fembed-bitcode -target wasm32 -Oz" + CARGO_PROFILE_RELEASE_LTO=true cargo rustc $CARGO_BUILD_ARGS -v --release --target=wasm32-wasi -- -C embed-bitcode=yes -C opt-level=z -C linker-plugin-lto -C lto else echo "Cannot build WASM lib as clang does not seem to support the wasm32-wasi target" fi -- 2.39.5