Clang для -target i686-pc-linux-gnu использует lld, как и ожидалось:
pedrolamarao@DESKTOP-I02JQQR:~$ clang -fuse-ld=lld -target i686-pc-linux-gnu -march=i686 -ffreestanding -fno-builtin -no
stdlib -nostdinc -nostdinc++ -v start.cpp
clang version 10.0.0
Target: i686-pc-linux-gnu
Thread model: posix
InstalledDir: /home/pedrolamarao/tools/bin
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/8
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/8
Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/8
Candidate multilib: .;@m64
Candidate multilib: 32;@m32
Candidate multilib: x32;@mx32
Selected multilib: 32;@m32
"/home/pedrolamarao/tools/bin/clang-10" -cc1 -triple i686-pc-linux-gnu -emit-obj -mrelax-all -disable-free -disable-llvm-verifier -discard-value-names -main-file-name start.cpp -mrelocation-model static -mthread-model posix -mframe-pointer=all -fmath-errno -fno-rounding-math -masm-verbose -mconstructor-aliases -ffreestanding -target-cpu i686 -dwarf-column-info -fno-split-dwarf-inlining -debugger-tuning=gdb -v -nostdsysteminc -nobuiltininc -resource-dir /home/pedrolamarao/tools/lib/clang/10.0.0 -fdeprecated-macro -fdebug-compilation-dir /home/pedrolamarao -ferror-limit 19 -fmessage-length 0 -fno-builtin -fgnuc-version=4.2.1 -fobjc-runtime=gcc -fcxx-exceptions -fexceptions -fdiagnostics-show-option -fcolor-diagnostics -faddrsig -o /tmp/start-4db9f3.o -x c++ start.cpp
clang -cc1 version 10.0.0 based upon LLVM 10.0.0 default target x86_64-unknown-linux-gnu
#include "..." search starts here:
End of search list.
"/home/pedrolamarao/tools/bin/ld.lld" --hash-style=both --eh-frame-hdr -m elf_i386 -dynamic-linker /lib/ld-linux.so.2 -o a.out -L/usr/lib/gcc/x86_64-linux-gnu/8/32 -L/usr/lib/gcc/x86_64-linux-gnu/8/../../../i386-linux-gnu -L/usr/lib/gcc/x86_64-linux-gnu/8/../../../../lib32 -L/lib/i386-linux-gnu -L/lib/../lib32 -L/usr/lib/i386-linux-gnu -L/usr/lib/../lib32 -L/usr/lib/x86_64-linux-gnu/../../lib32 -L/usr/lib/gcc/x86_64-linux-gnu/8 -L/usr/lib/gcc/x86_64-linux-gnu/8/../../.. -L/home/pedrolamarao/tools/bin/../lib -L/lib -L/usr/lib /tmp/start-4db9f3.o
ld.lld: warning: cannot find entry symbol _start; defaulting to 0x4010F0
Почему для -target i686-pc-none-elf не используется lld и вместо него используется g cc?
pedrolamarao@DESKTOP-I02JQQR:~$ clang -fuse-ld=lld -target i686-pc-none-elf -march=i686 -ffreestanding -fno-builtin -nos
tdlib -nostdinc -nostdinc++ -v start.cpp
clang version 10.0.0
Target: i686-pc-none-elf
Thread model: posix
InstalledDir: /home/pedrolamarao/tools/bin
"/home/pedrolamarao/tools/bin/clang-10" -cc1 -triple i686-pc-none-elf -emit-obj -mrelax-all -disable-free -disable-llvm-verifier -discard-value-names -main-file-name start.cpp -mrelocation-model static -mthread-model posix -mframe-pointer=all -fmath-errno -fno-rounding-math -masm-verbose -mconstructor-aliases -ffreestanding -target-cpu i686 -dwarf-column-info -fno-split-dwarf-inlining -debugger-tuning=gdb -v -nostdsysteminc -nobuiltininc -resource-dir /home/pedrolamarao/tools/lib/clang/10.0.0 -fdeprecated-macro -fdebug-compilation-dir /home/pedrolamarao -ferror-limit 19 -fmessage-length 0 -fno-builtin -fgnuc-version=4.2.1 -fobjc-runtime=gcc -fcxx-exceptions -fexceptions -fdiagnostics-show-option -fcolor-diagnostics -faddrsig -o /tmp/start-e7a316.o -x c++ start.cpp
clang -cc1 version 10.0.0 based upon LLVM 10.0.0 default target x86_64-unknown-linux-gnu
#include "..." search starts here:
End of search list.
"/usr/bin/gcc" -fuse-ld=lld -march=i686 -ffreestanding -fno-builtin -nostdlib -nostdinc -nostdinc++ -v -m32 -o a.out /tmp/start-e7a316.o
Using built-in specs.
COLLECT_GCC=/usr/bin/gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/8/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian 8.3.0-6' --with-bugurl=file:///usr/share/doc/gcc-8/README.Bugs --enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr --with-gcc-major-version-only --program-suffix=-8 --program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --enable-bootstrap --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-vtable-verify --enable-libmpx --enable-plugin --enable-default-pie --with-system-zlib --with-target-system-zlib --enable-objc-gc=auto --enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic --enable-offload-targets=nvptx-none --without-cuda-driver --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 8.3.0 (Debian 8.3.0-6)
COMPILER_PATH=/usr/lib/gcc/x86_64-linux-gnu/8/:/usr/lib/gcc/x86_64-linux-gnu/8/:/usr/lib/gcc/x86_64-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/8/:/usr/lib/gcc/x86_64-linux-gnu/
LIBRARY_PATH=/usr/lib/gcc/x86_64-linux-gnu/8/32/:/usr/lib/gcc/x86_64-linux-gnu/8/../../../i386-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/8/../../../../lib32/:/lib/i386-linux-gnu/:/lib/../lib32/:/usr/lib/i386-linux-gnu/:/usr/lib/../lib32/:/usr/lib/gcc/x86_64-linux-gnu/8/:/usr/lib/gcc/x86_64-linux-gnu/8/../../../i386-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/8/../../../:/lib/i386-linux-gnu/:/lib/:/usr/lib/i386-linux-gnu/:/usr/lib/
COLLECT_GCC_OPTIONS='-fuse-ld=lld' '-march=i686' '-ffreestanding' '-fno-builtin' '-nostdlib' '-nostdinc' '-nostdinc++' '-v' '-m32' '-o' 'a.out'
/usr/lib/gcc/x86_64-linux-gnu/8/collect2 -plugin /usr/lib/gcc/x86_64-linux-gnu/8/liblto_plugin.so -plugin-opt=/usr/lib/gcc/x86_64-linux-gnu/8/lto-wrapper -plugin-opt=-fresolution=/tmp/ccc8Evqw.res --build-id --eh-frame-hdr -m elf_i386 --hash-style=gnu -dynamic-linker /lib/ld-linux.so.2 -pie -fuse-ld=lld -o a.out -L/usr/lib/gcc/x86_64-linux-gnu/8/32 -L/usr/lib/gcc/x86_64-linux-gnu/8/../../../i386-linux-gnu -L/usr/lib/gcc/x86_64-linux-gnu/8/../../../../lib32 -L/lib/i386-linux-gnu -L/lib/../lib32 -L/usr/lib/i386-linux-gnu -L/usr/lib/../lib32 -L/usr/lib/gcc/x86_64-linux-gnu/8 -L/usr/lib/gcc/x86_64-linux-gnu/8/../../../i386-linux-gnu -L/usr/lib/gcc/x86_64-linux-gnu/8/../../.. -L/lib/i386-linux-gnu -L/usr/lib/i386-linux-gnu /tmp/start-e7a316.o
ld.lld: warning: cannot find entry symbol _start; defaulting to 0x11B0
COLLECT_GCC_OPTIONS='-fuse-ld=lld' '-march=i686' '-ffreestanding' '-fno-builtin' '-nostdlib' '-nostdinc' '-nostdinc++' '-v' '-m32' '-o' 'a.out'