From: Charlie Jenkins <charlie@rivosinc.com>
To: buildroot@buildroot.org
Subject: Re: [Buildroot] Crosstool-ng external toolchain with BR2_ROOTFS_MERGED_USR
Date: Mon, 10 Mar 2025 19:50:50 -0700 [thread overview]
Message-ID: <Z8-lCmBldqRf-Mwr@ghost> (raw)
In-Reply-To: <Z86AGdrKHaUqgLVt@ghost>
On Sun, Mar 09, 2025 at 11:00:57PM -0700, Charlie Jenkins wrote:
> On Sun, Mar 09, 2025 at 10:52:53PM -0700, Charlie Jenkins wrote:
> > I am trying to use a crosstool-ng build toolchain in Buildroot with the
> > BR2_ROOTFS_MERGED_USR option enabled. However, crosstool-ng installs
> > the sysroot libs at /lib instead /usr/lib as BR2_ROOTFS_MERGED_USR
> > expects. I am not sure what the best solution for this is. Should
> > BR2_ROOTFS_MERGED_USR be ignored for toolchain packages when an external
> > toolchain is being used?
>
> I meant to add more information about the failure...
>
> Because crosstool-ng installs the libs at /lib instead of /usr/lib, the
> libraries end up getting symlinked into nothingness. For example:
>
> $ ls -l ./output/host/riscv64-buildroot-linux-gnu/sysroot/usr/lib/libm.so
> lrwxrwxrwx 1 charlie rvs 6 Mar 9 22:58 ./output/host/riscv64-buildroot-linux-gnu/sysroot/usr/lib/libm.so -> ../../
I believed I fixed the problem here:
https://lore.kernel.org/buildroot/20250310-fix_external_toolchains-v1-1-446f48af7cf7@rivosinc.com/T/#u
- Charlie
>
> >
> > My crosstool-ng config is:
> > CT_CONFIG_VERSION="4"
> > CT_ARCH_RISCV=y
> > # CT_DEMULTILIB is not set
> > CT_ARCH_USE_MMU=y
> > CT_ARCH_64=y
> > CT_ARCH_ARCH="rv64gc"
> > CT_KERNEL_LINUX=y
> > CT_CC_LANG_CXX=y
> > CT_DEBUG_GDB=y
> > # CT_GDB_CROSS_PYTHON is not set
> > # CT_GDB_GDBSERVER is not set
> >
> > My buildroot config is:
> > BR2_riscv=y
> > BR2_TOOLCHAIN_EXTERNAL=y
> > BR2_TOOLCHAIN_EXTERNAL_CUSTOM=y
> > BR2_TOOLCHAIN_EXTERNAL_DOWNLOAD=y
> > BR2_TOOLCHAIN_EXTERNAL_URL="<path to built crosstool-ng toolchain>"
> > BR2_TOOLCHAIN_EXTERNAL_CUSTOM_PREFIX="$(ARCH)-unknown-linux-gnu"
> > BR2_TOOLCHAIN_EXTERNAL_HEADERS_6_11=y
> > BR2_TOOLCHAIN_EXTERNAL_CUSTOM_GLIBC=y
> > # BR2_TOOLCHAIN_EXTERNAL_INET_RPC is not set
> > # BR2_STRIP_strip is not set
> > BR2_ROOTFS_MERGED_USR=y
> >
> > - Charlie
> >
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prev parent reply other threads:[~2025-03-11 2:50 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-03-10 5:52 [Buildroot] Crosstool-ng external toolchain with BR2_ROOTFS_MERGED_USR Charlie Jenkins
2025-03-10 6:00 ` Charlie Jenkins
2025-03-11 2:50 ` Charlie Jenkins [this message]
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