[Buildroot] __tls_get_addr compilation issue

vbr vbr vvvg77 at gmail.com
Wed Dec 21 23:46:50 UTC 2011


Hi,

I am seeing an issue while compiling the pcre library (and a few other
packages) with buildroot-2011.08, using an external ct-ng toolchain. Target
arch is x86_64.

x86_64-foo-linux-uclibc/lib/../lib64/libstdc++.so: undefined reference to
`__tls_get_addr'

It seems people usually fix this by adding TLS support, but my config
already enables that:

uClibc config:

$ grep TLS ../crosstool-ng-1.12.3/uClibc-0.9.32.config
UCLIBC_HAS_TLS=y
$ grep THREAD ../crosstool-ng-1.12.3/uClibc-0.9.32.config
# HAS_NO_THREADS is not set
# LINUXTHREADS_OLD is not set
# LINUXTHREADS_NEW is not set
UCLIBC_HAS_THREADS_NATIVE=y
UCLIBC_HAS_THREADS=y
# PTHREADS_DEBUG_SUPPORT is not set

crosstool-ng config:

$ grep THREAD ../crosstool-ng-1.12.3/.config
CT_LIBC_SUPPORT_THREADS_ANY=y
CT_LIBC_SUPPORT_LINUXTHREADS=y
CT_LIBC_SUPPORT_THREADS_NONE=y
CT_THREADS="linuxthreads"
CT_THREADS_LINUXTHREADS=y
# CT_THREADS_NONE is not set

buildroot config:

$ grep THREAD .config
BR2_TOOLCHAIN_EXTERNAL_HAS_THREADS=y
BR2_TOOLCHAIN_HAS_THREADS=y

Any idea how to fix this?

Thanks
Vincent
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