CLFS

export CLFS_TARGET=arm-linux-gnueabi
export CLFS_HOST=aarch64-cross-linux-gnu

# binutils
../configure \
	--prefix=/cross-tools \
    --target=arm-linux-gnueabi \
    --with-sysroot=${CLFS} \
    --with-arch=armv7l \
    --with-float=soft \
    --disable-nls \
    --enable-gprofng=no \
    --disable-werror
make -j4 
make install

# Install the Linux kernel headers
make ARCH=arm INSTALL_HDR_PATH=/cross-tools/arm-linux-gnueabi headers_install

# Build gcc (first phase)
../configure \
	--prefix=/cross-tools \
    --target=arm-linux-gnueabi \
    --prefix=/cross-tools \
    --build=${CLFS_HOST} \
    --host=${CLFS_HOST} \
    --with-sysroot=${CLFS} \
    --enable-languages=c,c++ \
    --with-glibc-version=2.37 \
    --with-arch=armv7 \
    --with-float=soft \
    --with-newlib             \
    --without-headers         \
    --enable-default-pie      \
    --enable-default-ssp      \
    --disable-nls             \
    --disable-shared          \
    --disable-multilib        \
    --disable-threads         \
    --disable-libatomic       \
    --disable-libgomp         \
    --disable-libquadmath     \
    --disable-libssp          \
    --disable-libvtv          \
    --disable-libstdcxx       \
    --disable-werror
make -j4 all-gcc
make install-gcc

# glibc
BUILD_CC="gcc" \
CC="${CLFS_TARGET}-gcc" \
AR="${CLFS_TARGET}-ar" \
RANLIB="${CLFS_TARGET}-ranlib" \
ASFLAGS="-mcpu=cortex-m3 -mthumb -mno-thumb-interwork -mfpu=vfp -msoft-float -mfix-cortex-m3-ldrd" \
../configure \
    --prefix=/tools \
    --host=${CLFS_TARGET} \
    --build=${CLFS_HOST} \
    --enable-kernel=3.2 \
    --with-binutils=/cross-tools/bin \
    --with-headers=/tools/include \
    --enable-obsolete-rpc
    
make install-bootstrap-headers=yes install-headers

export CLFS=/mnt/clfs

moutn -v -t ext4 /dev/<xxx> $CLFS

 

https://blog.jgosmann.de/posts/2021/02/07/a-guide-to-crosscompiling-applications/

A guide to cross-compiling applications | Jan's blog

https://wiki.osdev.org/GCC_Cross-Compiler

GCC Cross-Compiler - OSDev Wiki

https://gist.github.com/rikka0w0/612149263721050f69acdc0497bf9fb8

Build gcc cross-compiler for armv7l (arm-linux-gnueabi)