https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118748
--- Comment #13 from user3mila at disroot dot org --- Qt was compiled using this https://gitlab.alpinelinux.org/alpine/aports/-/blob/3.22-stable/community/qt6-qtbase/APKBUILD plus -fstack-reuse=none. If I understoop correctly the optimization is in https://gitlab.alpinelinux.org/alpine/abuild/-/blob/master/abuild.in so only "-g" is added for debug. I looked for CFLAGS and CXXFLAGS. gcc -v Using built-in specs. COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/usr/libexec/gcc/aarch64-alpine-linux-musl/14.2.0/lto-wrapper Target: aarch64-alpine-linux-musl Configured with: /home/buildozer/aports/main/gcc/src/gcc-14.2.0/configure --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --build=aarch64-alpine-linux-musl --host=aarch64-alpine-linux-musl --target=aarch64-alpine-linux-musl --enable-checking=release --disable-cet --disable-fixed-point --disable-libstdcxx-pch --disable-multilib --disable-nls --disable-werror --disable-symvers --enable-__cxa_atexit --enable-default-pie --enable-default-ssp --enable-languages=c,c++,d,objc,go,fortran,ada --enable-link-serialization=2 --enable-linker-build-id --with-arch=armv8-a --with-abi=lp64 --disable-libquadmath --disable-libssp --disable-libsanitizer --enable-shared --enable-threads --enable-tls --with-bugurl=https://gitlab.alpinelinux.org/alpine/aports/-/issues --with-system-zlib --with-linker-hash-style=gnu --with-pkgversion='Alpine 14.2.0' Thread model: posix Supported LTO compression algorithms: zlib gcc version 14.2.0 (Alpine 14.2.0)