reproduced in clean chroot

testing-chroot.txt (text/plain), 1.84 KB, created by Jonas Rakebrandt on 2023-01-17 19:52:20 UTC

# Steps to reproduce in chroot:
# Chroot Setup:
mkdir /opt/testing-chroot
cd /opt/testing-chroot
curl -LO <openrc-desktop-stage3-tarball>
tar xpvf stage3-*.tar.xz --xattrs-include='*.*' --numeric-owner
mkdir --parents etc/portage/repos.conf
cp usr/share/portage/config/repos.conf etc/portage/repos.conf/gentoo.conf
cp --dereference /etc/resolv.conf etc/
mount --types proc /proc /opt/testing-chroot/proc
mount --rbind /sys /opt/testing-chroot/sys
mount --make-rslave /opt/testing-chroot/sys
mount --rbind /dev /opt/testing-chroot/dev
mount --make-rslave /opt/testing-chroot/dev
mount --bind /run /opt/testing-chroot/run
mount --make-slave /opt/testing-chroot/run 
chroot . /bin/bash
source /etc/profile
emerge --sync
emerge clang # pulls in stable clang 15.0.6

# Initital test:
CC=clang CXX=clang++ CFLAGS="-O2 -pipe" emerge qtcore syntax-highlighting # works

# Test with clang-common[default-lld] to see if lld issue:
CC=clang CXX=clang++ CFLAGS="-O2 -pipe" CXXFLAGS="$CFLAGS" emerge qtcore syntax-highlighting # works

# Also try with harder optimization flags:
CC=clang CXX=clang++ CFLAGS="-march=native -O3 -flto=thin -pipe" CXXFLAGS="$CFLAGS" emerge qtcore syntax-highlighting # works

# Upgrade clang-common to ~amd64 (15.0.7 - after baseline-hardening) & remove default-lld flag:
CC=clang CXX=clang++ CFLAGS="-O2 -pipe" CXXFLAGS="$CFLAGS" emerge qtcore syntax-highlighting # fails

# Test with clang-common[default-lld] again:
CC=clang CXX=clang++ CFLAGS="-O2 -pipe" CXXFLAGS="$CFLAGS" emerge qtcore syntax-highlighting # fails

# Downgrade clang-common back to amd64 (15.0.6 - before baseline-hardening):
CC=clang CXX=clang++ CFLAGS="-O2 -pipe" CXXFLAGS="$CFLAGS" emerge qtcore syntax-highlighting # works

# Also try with harder optimization flags:
CC=clang CXX=clang++ CFLAGS="-march=native -O3 -flto=thin -pipe" CXXFLAGS="$CFLAGS" emerge qtcore syntax-highlighting # works