On 12/06/2024 11:30, Klaus Rudolph via Gcc-help wrote: > > > I try to build a cross gcc compiler for an older ARM platform. > Installing binutils was successful but gcc fails. > > Host platform linux x86_64 binutils version to cross build:2.42 gcc > version to cross build: 14.1.0 > > What I did ( sorry, very detailed, maybe I did something totally stupid... ) > > First, I created a docker image with the following Dockerfile to get a > root filesystem: > > Dockerfile: > ######### > FROM debian:8 as base > # Needed for old Debians > RUN printf "deb [trusted=yes] http://archive.debian.org/debian jessie > main\ndeb [trusted=yes] http://archive.debian.org/debian-security > jessie/updates main" > /etc/apt/sources.list > > # Install dependencies available in the Debian repos > RUN apt-get update && \ > apt-get install -y \ > build-essential automake libtool cmake wget \ > libsnmp-dev libdb-dev \ > libssl-dev \ > libopus-dev libasound2-dev vim > ############# > >> podman build . --arch=arm > > and export the file system to my host filesystem: > >> podman image mount > > and copied the root filesystem simply with cp -pr <path>/* > <some/place/at/my/host> > > I now used a simple Makefile for installing binutils: > > ######### > # cross compile binutils > BINUTILS_VERSION=2.42 > GCC_VERSION=14.1.0 > > #http://ftp.fu-berlin.de/gnu/binutils/ binutils-2.42.tar.xz > binutils_cross: > wget -nc > http://ftp.fu-berlin.de/gnu/binutils/binutils-$(BINUTILS_VERSION).tar.xz > tar xf binutils-$(BINUTILS_VERSION).tar.xz > (\ > cd binutils-$(BINUTILS_VERSION); \ > mkdir build_armv7 ; \ > cd build_armv7; \ > ../configure --prefix=/opt/armv7_$(GCC_VERSION) > --with-sysroot=/opt/podman_debian8/merged --enable-multiarch > --with-fpu=vfpv3-d16 --with-mode=thumb --with-arch=armv7-a > --target=arm-linux-gnueabihf ; \ > make; \ > sudo make install; \ > ) > ############## > > binutils installation works without any error messages. > > Now I tried to install gcc with this part of the install Makefile: > > ######### > gcc_cross: > wget -nc > http://ftp.fu-berlin.de/gnu/gcc/gcc-$(GCC_VERSION)/gcc-$(GCC_VERSION).tar.xz > tar xf gcc-$(GCC_VERSION).tar.xz > ( \ > cd gcc-$(GCC_VERSION); \ > ./contrib/download_prerequisites; \ > mkdir build_armv7;\ > cd build_armv7;\ > ../configure --prefix=/opt/armv7_$(GCC_VERSION) > --enable-languages=c,c++ --with-sysroot=/opt/podman_debian8/merged > --enable-multiarch --with-fpu=vfpv3-d16 --with-mode=thumb > --with-arch=armv7-a --target=arm-linux-gnueabihf --disable-multilib; \ > make -j6;\ > sudo make install;\ > ) > ########### > > > make[3]: *** [Makefile:2998: build/gengenrtl.o] Error 1 > make[3]: *** Waiting for unfinished jobs.... > yes > checking how to run the C preprocessor... > /opt/armv7_14.1.0/arm-linux-gnueabihf/bin/as: unrecognized option '--64' > make[3]: *** [Makefile:2998: build/genhooks.o] Error 1 > /opt/armv7_14.1.0/arm-linux-gnueabihf/bin/as: unrecognized option '--64' > make[3]: *** [Makefile:2998: build/sort.o] Error 1 > gcc -E > /opt/armv7_14.1.0/arm-linux-gnueabihf/bin/as: unrecognized option '--64' > make[3]: *** [Makefile:2998: build/genchecksum.o] Error 1 > checking for grep that handles long lines and -e... /usr/bin/grep > checking for egrep... /usr/bin/grep -E > checking for ANSI C header files... yes > checking for sys/types.h... yes > checking for sys/stat.h... yes > /bin/sh ../../gcc/../move-if-change tmp-optionlist optionlist > checking for stdlib.h... echo timestamp > s-options > make[3]: Leaving directory > '/home/krud/compiler_install/gcc-14.1.0/build_armv7/gcc' > make[2]: *** [Makefile:4714: all-gcc] Error 2 > > > I wonder why I see the "unrecognized option '--64'" message, as I try > to cross build for arm32. > > Did I use some wrong configure options or have missed some? Maybe > already in the first step while installing binutils? I think it's the PATH that you're using while building GCC. Binutils installs several versions of the assembler under different names, but the one you'll want in a normal cross compiler will be called arm-none-eabi-as (not just 'as'). The problem is that your native compiler (which is used to build the 'gen*' programs needs an assembler as well, and since that is using the system compiler it uses 'as' directly; but you've overridden that with your cross assembler. Hope that helps, R. > > Thanks > Klaus
