altcross: initial version based on https://github.com/abhiTronix/raspberry-pi-cross-compilers

altcross.sh

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+#!/bin/bash
+set -e
+set -x
+
+KERNEL_VERSION='5.4'
+BINUTILS_VERSION='2.31.1'
+GCC_VERSION='8.4.1-20200305'
+GLIBC_VERSION='2.27-alt13'
+
+KERNEL_SOURCE="/usr/src/kernel/sources/kernel-source-${KERNEL_VERSION}.tar"
+BINUTILS_SOURCE="/usr/src/binutils-source/binutils-${BINUTILS_VERSION}.tar"
+GCC_SOURCE="/usr/src/gcc-source/gcc-${GCC_VERSION}.tar"
+GLIBC_SOURCE="/usr/src/glibc-source/glibc-${GLIBC_VERSION}.tar"
+
+
+TARGET=aarch64-linux-gnu
+
+BUILDDIR="`pwd`/build"
+SRCDIR="`pwd`/src"
+INSTALLDIR="`pwd`/inst/altcross-gcc-${GCC_VERSION}"
+SYSROOT=/$TARGET/libc
+SYSROOTDIR="$INSTALLDIR/$SYSROOT"
+
+mkdir -p -m755 "$SRCDIR"
+cd "$SRCDIR"
+
+tar xf "$KERNEL_SOURCE"
+tar xf "$BINUTILS_SOURCE"
+tar xf "$GCC_SOURCE"
+tar xf "$GLIBC_SOURCE"
+
+cd "gcc-${GCC_VERSION}"
+sed -i contrib/download_prerequisites -e '/base_url=/s/ftp/http/'
+./contrib/download_prerequisites
+
+mkdir -p -m755 "$INSTALLDIR/bin"
+export PATH="$INSTALLDIR/bin:$PATH"
+unset LD_LIBRARY_PATH
+
+mkdir -p -m755 \
+	"$BUILDDIR/obj_binutils" \
+	"$BUILDDIR/obj_gcc" \
+	"$BUILDDIR/obj_glibc" \
+	"$BUILDDIR/obj_kernel" \
+
+make -j$(nproc) \
+	-C "$SRCDIR/kernel-source-${KERNEL_VERSION}" \
+	O="$BUILDDIR/obj_kernel" \
+	ARCH=arm64 \
+	INSTALL_HDR_PATH="$SYSROOTDIR/usr" \
+	headers_install
+
+# binutils
+
+cd "$BUILDDIR/obj_binutils"
+../../src/binutils-${BINUTILS_VERSION}/configure \
+	--target="$TARGET" \
+	--prefix= \
+	--with-sysroot="$SYSROOT" \
+	--with-build-sysroot="$SYSROOTDIR" \
+	--disable-multilib
+
+make -j$(nproc)
+make -j$(nproc) install DESTDIR="$INSTALLDIR"
+
+# gcc 
+cd "$BUILDDIR/obj_gcc"
+../../src/gcc-${GCC_VERSION}/configure \
+	--prefix= \
+	--target=$TARGET \
+	--enable-languages=c,c++ \
+	--with-sysroot="$SYSROOT" \
+	--with-build-sysroot="$SYSROOTDIR" \
+	--disable-multilib
+
+# compiler only
+make -j$(nproc) all-gcc
+make -j$(nproc) install-gcc DESTDIR="$INSTALLDIR"
+
+
+# glibc
+
+cd "$BUILDDIR/obj_glibc"
+../../src/glibc-${GLIBC_VERSION}/configure \
+	--prefix=/usr \
+	--target=$TARGET \
+	--host=$TARGET \
+	--build="$MACHTYPE" \
+	--with-sysroot="$SYSROOT" \
+       	--with-build-sysroot="$SYSROOTDIR" \
+	--with-headers="$SYSROOTDIR"/usr/include \
+	--with-lib="$SYSROOTDIR"/usr/lib \
+	--disable-multilib \
+	--disable-crypt \
+	libc_cv_forced_unwind=yes
+
+# glibc: headers + C runtime bits
+make -j$(nproc) install-bootstrap-headers=yes install-headers DESTDIR="$SYSROOTDIR"
+make -j$(nproc) csu/subdir_lib
+install -d -m755 "$SYSROOTDIR"/usr/lib
+install csu/crt1.o csu/crti.o csu/crtn.o "$SYSROOTDIR"/usr/lib
+$TARGET-gcc -nostdlib -nostartfiles -shared -x c /dev/null -o "$SYSROOTDIR"/usr/lib/libc.so
+touch "$SYSROOTDIR"/usr/include/gnu/stubs.h "$SYSROOTDIR"/usr/include/bits/stdio_lim.h
+
+# GCC: runtime (libgcc)
+cd "$BUILDDIR/obj_gcc"
+make -j$(nproc) all-target-libgcc
+make -j$(nproc) install-target-libgcc DESTDIR="$INSTALLDIR"
+
+# finish off glibc 
+cd "$BUILDDIR/obj_glibc"
+make -j$(nproc)
+make install DESTDIR="$SYSROOTDIR"
+
+# finish off GCC
+cd "$BUILDDIR/obj_gcc"
+make -j$(nproc)
+make -j$(nproc) install DESTDIR="$INSTALLDIR"