[Buildroot] Using aarch64-linux-gnu_ilp32

[Assaf Hoffman]

Hi,
I'd like to use Buildroot in 32-bit ILP-32 mode while running in AARCH64.
I used gcc-linaro-7.3.1-2018.05-rc1-x86_64_aarch64-linux-gnu_ilp32 downloaded from Linaro as custom external toolchain
The build failed on misalignment between compiler mode ILP32 and source code mode (defined __LP64__) .
Is there a way to configure Buildroot to 32-bit build?
Thanks.

>>> busybox 1.29.3 Building
PATH="/home/assaf/work/buildroot/buildroot-2019.02.1/output/host/bin:/home/assaf/work/buildroot/buildroot-2019.02.1/output/host/sbin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin" CFLAGS="-D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64  -Os  " CFLAGS_busybox="" /usr/bin/make  CC="/home/assaf/work/buildroot/buildroot-2019.02.1/output/host/bin/aarch64-linux-gnu_ilp32-gcc" ARCH=arm64 PREFIX="/home/assaf/work/buildroot/buildroot-2019.02.1/output/target" EXTRA_LDFLAGS="" CROSS_COMPILE="/home/assaf/work/buildroot/buildroot-2019.02.1/output/host/bin/aarch64-linux-gnu_ilp32-" CONFIG_PREFIX="/home/assaf/work/buildroot/buildroot-2019.02.1/output/target" SKIP_STRIP=y -C /home/assaf/work/buildroot/buildroot-2019.02.1/output/build/busybox-1.29.3
make[1]: Entering directory `/home/assaf/work/buildroot/buildroot-2019.02.1/output/build/busybox-1.29.3'
  CC      applets/applets.o
In file included from /home/assaf/work/buildroot/buildroot-2019.02.1/output/host/aarch64-buildroot-linux-gnu/sysroot/usr/include/features.h:452:0,
                 from /home/assaf/work/buildroot/buildroot-2019.02.1/output/host/aarch64-buildroot-linux-gnu/sysroot/usr/include/bits/libc-header-start.h:33,
                 from /home/assaf/work/buildroot/buildroot-2019.02.1/output/host/aarch64-buildroot-linux-gnu/sysroot/usr/include/limits.h:26,
                 from /home/hoffman/work/toolchains/gcc-linaro-7.3.1-2018.05-rc1-x86_64_aarch64-linux-gnu_ilp32/lib/gcc/aarch64-linux-gnu_ilp32/7.3.1/include-fixed/limits.h:194,
                 from /home/hoffman/work/toolchains/gcc-linaro-7.3.1-2018.05-rc1-x86_64_aarch64-linux-gnu_ilp32/lib/gcc/aarch64-linux-gnu_ilp32/7.3.1/include-fixed/syslimits.h:7,
                 from /home/hoffman/work/toolchains/gcc-linaro-7.3.1-2018.05-rc1-x86_64_aarch64-linux-gnu_ilp32/lib/gcc/aarch64-linux-gnu_ilp32/7.3.1/include-fixed/limits.h:34,
                 from include/platform.h:153,
                 from include/libbb.h:13,
                 from include/busybox.h:8,
                 from applets/applets.c:9:
/home/assaf/work/buildroot/buildroot-2019.02.1/output/host/aarch64-buildroot-linux-gnu/sysroot/usr/include/gnu/stubs.h:8:11: fatal error: gnu/stubs-lp64.h: No such file or directory
# include <gnu/stubs-lp64.h>
           ^~~~~~~~~~~~~~~~~~
compilation terminated.
make[2]: *** [applets/applets.o] Error 1
make[1]: *** [applets_dir] Error 2
make[1]: Leaving directory `/home/assaf/work/buildroot/buildroot-2019.02.1/output/build/busybox-1.29.3'
make: *** [/home/assaf/work/buildroot/buildroot-2019.02.1/output/build/busybox-1.29.3/.stamp_built] Error 2
assaf at hoffman-OptiPlex-780:~/work/buildroot/buildroot-2019.02.1$


________________________________
________________________________
Assaf Hoffman, Marvell Israel - Staff Field Application Engineer
6 Hamada Street
Mordot HaCarmel Industrial Park
Yokneam, 2069203, Israel
Email: hoffman at marvell.com<mailto:hoffman at marvell.com>
Office:  +972.4.9091203 - OnNet: 704.1203
Fax:      +972.4.9091501
Mobile: +972.54.4990584
Web site: http://www.marvell.com

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