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From: Matthew Weber <matthew.weber@rockwellcollins.com>
To: buildroot@busybox.net
Subject: [Buildroot] [PATCH 07/11] package/busybox: fix applets runtime issue when building with clang cross-compiler
Date: Fri, 6 Sep 2019 22:17:32 -0500	[thread overview]
Message-ID: <CANQCQpY_hVuJxHU-H--80pb+NfPQaJg9aREjO0TaoYc-arWqjQ@mail.gmail.com> (raw)
In-Reply-To: <CANQCQpYDyAcV6HkabqzVOBVPAgs9GA=ZtfronrAV=r=nt9LYVQ@mail.gmail.com>

Romain,

On Fri, Sep 6, 2019 at 10:11 PM Matthew Weber
<matthew.weber@rockwellcollins.com> wrote:
>
> Romain,
>
> On Fri, Sep 6, 2019 at 4:10 AM Romain Naour <romain.naour@smile.fr> wrote:
> >
> > Apply a patch contributed by Luis Marques on the Busybox mailing list [1]
> > fixing a runtime issue (segfault) when busybox is compiled by Clang.
> >
> > The patch disable the compiler optimizations for Clang/LLVM only.
> >
> > Without this patch, busybox segfault with several applets
> > (login on aarch64 using Clang 8.0.1, init on x86_64 using Clang 9.0.0rc3)
> >
> > [1] http://lists.busybox.net/pipermail/busybox/2019-June/087337.html
> >
>
> Got a "crtbegin.o no such file or directory" error when I setup a
> build using master with qemu_aarch64_virt_defconfig (updated for
> prebuilt external toolchain and enabling clang as cross-compiler).
> https://paste.ubuntu.com/p/wxrmVTGVvp/
>

# find output/host/ -name  crtbegin.o
output/host/opt/ext-toolchain/lib/gcc/aarch64-linux-gnu/8.3.0/crtbegin.o
# output/host/bin/clang -print-search-dirs
programs: =/accts/mlweber1/tmp.M0HlOc7IKF-buildroot/output/host/bin:/..//bin
libraries: =/accts/mlweber1/tmp.M0HlOc7IKF-buildroot/output/host/lib/clang/8.0.1:/accts/mlweber1/tmp.M0HlOc7IKF-buildroot/output/host/aarch64-buildroot-linux-gnu/sysroot/lib/../lib64:/accts/mlweber1/tmp.M0HlOc7IKF-buildroot/output/host/aarch64-buildroot-linux-gnu/sysroot/usr/lib/../lib64:/accts/mlweber1/tmp.M0HlOc7IKF-buildroot/output/host/aarch64-buildroot-linux-gnu/sysroot/lib:/accts/mlweber1/tmp.M0HlOc7IKF-buildroot/output/host/aarch64-buildroot-linux-gnu/sysroot/usr/lib


> From your comment earlier on irc that you tested with 9.0.1 (x86_64
> and aarch64), I wonder if this error is a difference between building
> with clang 8.0.1 and 9.
>
> I was able to build compiler-rt & libfuzzer with your series applied
> and pass a runtime test (system still cross compiled with gcc but
> using "[01/11] package/clang: help host-clang to find our external
> toolchain" to find the sysroot).  This was instead of using the -B
> option when building libfuzzer as part of the runtime test.
>
> Matt



-- 

Matthew Weber | Associate Director Software Engineer | Commercial Avionics

COLLINS AEROSPACE

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  reply	other threads:[~2019-09-07  3:17 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-06  9:09 [Buildroot] [PATCH 00/11] Add the support for Clang cross-compiler Romain Naour
2019-09-06  9:09 ` [Buildroot] [PATCH 01/11] package/clang: help host-clang to find our external toolchain Romain Naour
2019-09-06  9:09 ` [Buildroot] [PATCH 02/11] package/llvm: add the version major variable Romain Naour
2019-09-06  9:09 ` [Buildroot] [PATCH 03/11] package/clang: " Romain Naour
2019-09-06  9:09 ` [Buildroot] [PATCH 04/11] package/clang: install a toolchain-wrapper for the host clang cross-compiler Romain Naour
2019-09-06  9:09 ` [Buildroot] [PATCH 05/11] linux: override CC for the case CC is not GCC Romain Naour
2019-09-06  9:09 ` [Buildroot] [PATCH 06/11] package/meson: use TARGET_{CC, CXX} instead of TARGET_CROSS Romain Naour
2019-09-06 15:58   ` Romain Naour
2019-09-06  9:09 ` [Buildroot] [PATCH 07/11] package/busybox: fix applets runtime issue when building with clang cross-compiler Romain Naour
2019-09-07  3:11   ` Matthew Weber
2019-09-07  3:17     ` Matthew Weber [this message]
2019-09-07  8:02     ` Romain Naour
2019-09-09 13:49       ` [Buildroot] [External] " Matthew Weber
2019-09-06  9:09 ` [Buildroot] [PATCH 08/11] package/clang: add a host entry for clang Romain Naour
2019-09-06  9:09 ` [Buildroot] [PATCH 09/11] core: allow to use Clang as cross-compiler Romain Naour
2019-09-06  9:09 ` [Buildroot] [PATCH 10/11] toolchain: add a warning when Clang is used " Romain Naour
2019-09-06  9:09 ` [Buildroot] [PATCH 11/11] linux: don't set -Wno-attribute-alias flag " Romain Naour

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