From 8522f3e53066196cff297484f5efe89c0a7fd40f Mon Sep 17 00:00:00 2001 From: Matt Corallo Date: Mon, 20 Dec 2021 06:13:55 +0000 Subject: [PATCH] Correctly detect non-default LLD usage Passing `-flto=ld*.lld-X` only appears to actually work on debian testing. The correct argument for an alternative version of LLD is `-flto=lld-X`. --- genbindings.sh | 19 +++++++++++++++---- 1 file changed, 15 insertions(+), 4 deletions(-) diff --git a/genbindings.sh b/genbindings.sh index 61fd243..44491f8 100755 --- a/genbindings.sh +++ b/genbindings.sh @@ -367,7 +367,12 @@ if [ "$HOST_PLATFORM" = "host: x86_64-apple-darwin" ]; then else CLANG_LLVM_V=$(clang --version | head -n1 | awk '{ print substr($4, 0, 2); }') if [ -x "$(which ld.lld)" ]; then - LLD_LLVM_V="$(ld.lld --version | awk '{ print substr($2, 0, 2); }')" + LLD_LLVM_V="$(ld.lld --version | awk '{ print $2; }')" + if [ "$LLD_LLVM_V" = "LLD" ]; then # eg if the output is "Debian LLD ..." + LLD_LLVM_V="$(ld.lld --version | awk '{ print substr($3, 0, 2); }')" + else + LLD_LLVM_V="$(ld.lld --version | awk '{ print substr($2, 0, 2); }')" + fi fi fi @@ -387,8 +392,14 @@ elif [ -x "$(which clang-$RUSTC_LLVM_V)" ]; then unset CLANGPP fi if [ "$LLD_LLVM_V" != "$RUSTC_LLVM_V" ]; then - LLD="$(which lld-$RUSTC_LLVM_V || echo lld)" - LLD_LLVM_V="$(ld.$LLD --version | awk '{ print substr($2, 0, 2); }')" + LLD="lld" + [ -x "$(which lld-$RUSTC_LLVM_V)" ] && LLD="lld-$RUSTC_LLVM_V" + LLD_LLVM_V="$(ld.lld-$RUSTC_LLVM_V --version | awk '{ print $2; }')" + if [ "$LLD_LLVM_V" = "LLD" ]; then # eg if the output is "Debian LLD ..." + LLD_LLVM_V="$(ld.lld-$RUSTC_LLVM_V --version | awk '{ print substr($3, 0, 2); }')" + else + LLD_LLVM_V="$(ld.lld-$RUSTC_LLVM_V --version | awk '{ print substr($2, 0, 2); }')" + fi if [ "$LLD_LLVM_V" != "$RUSTC_LLVM_V" ]; then echo "Could not find a workable version of lld, not using cross-language LTO" unset LLD @@ -513,7 +524,7 @@ if [ "$CLANGPP" != "" -a "$LLD" != "" ]; then CARGO_PROFILE_RELEASE_LTO=true cargo rustc -v --release -- -C linker-plugin-lto -C lto -C linker=$CLANG $LINK_ARG_FLAGS -C link-arg=-march=sandybridge -C link-arg=-mcpu=sandybridge -C link-arg=-mtune=sandybridge if [ "$2" = "true" ]; then - $CLANGPP $LOCAL_CFLAGS -flto -fuse-ld=lld -O2 demo.cpp target/release/libldk.a -ldl + $CLANGPP $LOCAL_CFLAGS -flto -fuse-ld=$LLD -O2 demo.cpp target/release/libldk.a -ldl strip ./a.out echo "C++ Bin size and runtime with cross-language LTO:" ls -lha a.out -- 2.39.5