GNU Linker equivalent command in OS X

I am following the same os-dev.pdf guide and encountered the same problem as you.

The bottom of the issue is that we need to compile a cross-compiled gcc anyway, so the solution is just to do so.

There is a good guide at OSDev but if you're running a recent version of OSX I prepared a specific guide for this on Github

Here are the commands, though please test them before pasting the whole wall of text on your computer! At the Github link you will find the full explanations, but since Stack Overflow seems to like the solution embedded on the answer, here it is.

Also, if you encounter any error, please report it back to me (here or with a Github issue) so that I can fix it for other people.

brew install gmp
brew install mpfr
brew install libmpc
brew install gcc

export CC=/usr/local/bin/gcc-4.9
export LD=/usr/local/bin/gcc-4.9

export PREFIX="/usr/local/i386elfgcc"
export TARGET=i386-elf
export PATH="$PREFIX/bin:$PATH"

mkdir /tmp/src
cd /tmp/src
curl -O http://ftp.gnu.org/gnu/binutils/binutils-2.24.tar.gz # If the link 404's, look for a more recent version
tar xf binutils-2.24.tar.gz
mkdir binutils-build
cd binutils-build
../binutils-2.24/configure --target=$TARGET --enable-interwork --enable-multilib --disable-nls --disable-werror --prefix=$PREFIX 2>&1 | tee configure.log
make all install 2>&1 | tee make.log

cd /tmp/src
curl -O http://mirror.bbln.org/gcc/releases/gcc-4.9.1/gcc-4.9.1.tar.bz2
tar xf gcc-4.9.1.tar.bz2
mkdir gcc-build
cd gcc-build
../gcc-4.9.1/configure --target=$TARGET --prefix="$PREFIX" --disable-nls --disable-libssp --enable-languages=c --without-headers
make all-gcc 
make all-target-libgcc 
make install-gcc 
make install-target-libgcc 

You will find GNU's binutils and your cross-compiled gcc at /usr/local/i386elfgcc/bin

manually install binutils always throw errors in my macOS.

The solution is to use homebrew:

brew tap nativeos/i386-elf-toolchain 
brew install i386-elf-binutils i386-elf-gcc

then, you can use i386-elf-ld command instead of ld