On Fri, Jul 23, 2021 at 11:14:47AM -0300, Adhemerval Zanella wrote: > > > On 23/07/2021 10:30, Joey Ye wrote: > > Hi toolchain experts, > > > > Is there any BKM or build script that can build AArch64 ILP32 glibc? > > Sincerely appreciate any help from Linaro. > > > > Thanks, > > Joey > > Hi Joey, > > Since ILP32 support is out-of-tree you will need to setup some branches. > As fair I know both binutils and gcc have upstream support, so there is > no need to use different branches. The gcc might lack some specific > support that interacts with kernel/glibc, such as sanitizers (I recall > that my initial approach of fixing it was not accepted on LLVM side > because we lack upstream support). > > You will also need an out-of-tree kernel branch as well. The latest one > from arm development repository [1] only supports up to v5.1.
I'd recommend fo use this branch since it has seccomp fix. https://github.com/norov/linux/commits/ilp32-5.2 > On glibc side we have the arm initial work on arm/ilp32 which supports > up to version 2.30 [2]. Andreas Schwab keeps a personal branch which I > think he uses internally on SuSE that he keeps updated. The last on > schwab/ilp32-2.33 [3] supports glibc 2.33 and I take he does run some > regressions tests (not sure though). > > For scripting, you can use the glibc build-many-glibcs.py [4] to build a > complete toolchain along with a basic sysroot. The script is build > to use per-determined versions and branches (usually the latest > available one), but you can hack into the source folders and change > it. The script work outside glibc source also. > > To build a gcc 11, binutils 2.35, linux v5.1, glibc 2.33 toolchain > you might do: > > $ build-many-glibcs.py /path/to/workdir checkout > $ build-many-glibcs.py /path/to/workdir host-libraries > $ cd /path/to/workdir/src > $ mv linux linux-pkg > $ git clone --single-branch --branch staging/ilp32-5.1 > git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git > $ cd glibc && git checkout -b schwab/ilp32-2.33 origin/schwab/ilp32-2.33 > $ build-many-glibcs.py /path/to/workdir compilers aarch64-linux-gnu-ilp32 > > The complete toolchain will be on > '/path/to/workdir/install/compilers/aarch64-linux-gnu-ilp32/'. The > default configuration for build-many-glibcs.py build a simple toolchain > without some gcc options meant to be used for glibc development. It > means only C and C++ support, no sanititzer, no multilib, no offload > support, etc. You can use the build-many-glibc.py '--full-gcc' option > to enable all gcc languages and sanitizers, but to add any other option > you will need to hack into the script. > > [1] https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git > [2] https://sourceware.org/git/?p=glibc.git;a=shortlog;h=refs/heads/arm/ilp32 > [3] > https://sourceware.org/git/?p=glibc.git;a=shortlog;h=refs/heads/schwab/ilp32-2.33 > [4] > https://sourceware.org/git/?p=glibc.git;a=blob;f=scripts/build-many-glibcs.py;h=6643bb6e92879e10c9fbfc9c2c660a8e6d30efb0;hb=HEAD > _______________________________________________ > linaro-toolchain mailing list > linaro-toolchain@lists.linaro.org > https://lists.linaro.org/mailman/listinfo/linaro-toolchain _______________________________________________ linaro-toolchain mailing list linaro-toolchain@lists.linaro.org https://lists.linaro.org/mailman/listinfo/linaro-toolchain
