Error when compiling using clang

[Kodehawa]

I'm not sure if I'm missing anything go-specific here. I've seen people compiling go projects with clang since forever, so I'm not really sure if I'm missing some go-specific environment variable here.

Compile flags:

export CC=clang
export CXX=clang++
export LD=/usr/bin/ld.lld
export AR="llvm-ar"
export NM="llvm-nm"
export RANLIB="llvm-ranlib"

# qmake stuff
export QMAKE_CC=clang
export QMAKE_CXX=clang++
export QMAKE_LINK=/usr/bin/ld.lld
export QMAKESPEC=linux-clang

CARCH="x86_64"
CHOST="x86_64-pc-linux-gnu"

# -Wno-error=range-loop-construct is for MultiMC, else it fails to build
CFLAGS="-march=znver1 -mtune=znver1 -flto=thin -O2 -pipe -fno-plt -Wno-error=range-loop-construct -Wno-long-long -Wno-cast-align"
CXXFLAGS+="${CFLAGS}"
LDFLAGS="-fuse-ld=lld -Wl,-O1,--sort-common,--as-needed,-z,relro,--thinlto-cache-dir=/home/kodehawa/.local/share/makepkg/cache/clang"
#-- Make Flags: change this for DistCC/SMP systems
MAKEFLAGS="-j12"

#-- Debugging flags
DEBUG_CFLAGS="-g"
DEBUG_CXXFLAGS="-g"

# Rust flags
RUSTFLAGS="-C opt-level=2 -C target-cpu=native"

Error message:

go build ./cmd/sbctl
# net
cannot parse gcc output $WORK/b070//_cgo_.o as ELF, Mach-O, PE, XCOFF object
make: *** [Makefile:22: sbctl] Error 2
make: *** Waiting for unfinished jobs....

Thanks you ❤️

[Foxboron]

I don't know how to use clang for this and I'm probably not spending time on it. Can reopen if anyone comes forth with any suggestions :) Thanks

[ericonr]

CFLAGS="... -flto=thin ..."
cannot parse gcc output $WORK/b070//cgo.o as ELF, Mach-O, PE, XCOFF object

The object file has LLVM bitcode instead of being a proper ELF file. The issue isn't clang, it's ThinLTO.