After "emerge -uDN --with-bdeps=y --complete-graph=y @world": clang -v clang version 17.0.1 Target: x86_64-pc-linux-gnu Thread model: posix InstalledDir: /usr/lib/llvm/17/bin Configuration file: /etc/clang/x86_64-pc-linux-gnu-clang.cfg System configuration file directory: /etc/clang Selected GCC installation: /usr/lib/gcc/x86_64-pc-linux-gnu/13 Candidate multilib: .;@m64 Selected multilib: .;@m64 "/usr/bin/x86_64-pc-linux-gnu-ld.bfd" -pie --hash-style=gnu --eh-frame-hdr -m elf_x86_64 -dynamic-linker /lib64/ld-linux-x86-64.so.2 -o a.out /usr/lib/gcc/x86_64-pc-linux-gnu/13/../../../../lib64/Scrt1.o /usr/lib/gcc/x86_64-pc-linux-gnu/13/../../../../lib64/crti.o /usr/lib/gcc/x86_64-pc-linux-gnu/13/crtbeginS.o -L/usr/lib/gcc/x86_64-pc-linux-gnu/13 -L/usr/lib/gcc/x86_64-pc-linux-gnu/13/../../../../lib64 -L/lib/../lib64 -L/usr/lib/../lib64 -L/usr/lib/gcc/x86_64-pc-linux-gnu/13/../../../../x86_64-pc-linux-gnu/lib -L/lib -L/usr/lib -z relro -z now -lgcc --as-needed -lgcc_s --no-as-needed -lc -lgcc --as-needed -lgcc_s --no-as-needed /usr/lib/gcc/x86_64-pc-linux-gnu/13/crtendS.o /usr/lib/gcc/x86_64-pc-linux-gnu/13/../../../../lib64/crtn.o /usr/bin/x86_64-pc-linux-gnu-ld.bfd: /usr/lib/gcc/x86_64-pc-linux-gnu/13/../../../../lib64/Scrt1.o: in function `_start': (.text+0x17): undefined reference to `main' clang: error: linker command failed with exit code 1 (use -v to see invocation) cat /etc/clang/x86_64-pc-linux-gnu-clang.cfg # This configuration file is used by x86_64-pc-linux-gnu-clang driver. @gentoo-common.cfg @gentoo-common-ld.cfg cat /etc/clang/gentoo-common.cfg # This file contains flags common to clang, clang++ and clang-cpp. @gentoo-runtimes.cfg @gentoo-gcc-install.cfg @gentoo-hardened.cfg # bug #870001 -include "/usr/include/gentoo/maybe-stddefs.h" cat /etc/clang/gentoo-runtimes.cfg # This file is initially generated by sys-devel/clang-runtime. # It is used to control the default runtimes using by clang. --rtlib=libgcc --unwindlib=libgcc --stdlib=libstdc++ -fuse-ld=bfd cat /etc/clang/gentoo-gcc-install.cfg # This file is maintained by gcc-config. # It is used to specify the selected GCC installation. --gcc-install-dir="/usr/lib/gcc/x86_64-pc-linux-gnu/13" cat /etc/clang/gentoo-hardened.cfg # Some of these options are added unconditionally, regardless of # USE=hardened, for parity with sys-devel/gcc. -fstack-clash-protection -fstack-protector-strong -fPIE -include "/usr/include/gentoo/fortify.h" # Options below are conditional on USE=hardened. -D_GLIBCXX_ASSERTIONS # Analogue to GLIBCXX_ASSERTIONS -D_LIBCPP_ENABLE_ASSERTIONS=1 cat /etc/clang/gentoo-common-ld.cfg # This file contains flags common to clang and clang++ @gentoo-hardened-ld.cfg cat /etc/clang/gentoo-hardened-ld.cfg # Some of these options are added unconditionally, regardless of # USE=hardened, for parity with sys-devel/gcc. -Wl,-z,relro # Options below are conditional on USE=hardened. -Wl,-z,now *********************************************************************** I have another gentoo system which is not yet updated, so i can see the same command before "emerge -uDN --with-bdeps=y --complete-graph=y @world": clang -v clang version 16.0.6 Target: x86_64-pc-linux-gnu Thread model: posix InstalledDir: /usr/lib/llvm/16/bin Configuration file: /etc/clang/clang.cfg System configuration file directory: /etc/clang Selected GCC installation: /usr/lib/gcc/x86_64-pc-linux-gnu/13 Candidate multilib: .;@m64 Selected multilib: .;@m64 cat /etc/clang/clang.cfg # This configuration file is used by clang driver. @gentoo-common.cfg All the remaining existing .cfg files with the same name are the same.
fwiw this is mostly harmless, but see discussion in bug 914468 *** This bug has been marked as a duplicate of bug 914468 ***
