Re: [yocto] Linker error undefined reference to `_rtld_global_ro'

["Khem Raj" <raj.khem@gmail.com>]

On 7/13/20 4:21 AM, Robert Varga wrote:
> Hello,
> 
> I am new to the Yocto project and need some help in solving a linker 
> issue when compiling/linking an application using the SDK. It seems, 
> that the compilation is completed, but the linker could not resolve to 
> "_rtld_global_ro". Here is the output of the last stage
> <snip>
> ...
> /opt/mydistro/1.0.0/sysroots/x86_64-pokysdk-linux/usr/libexec/arm-poky-linux-gnueabi/gcc/arm-poky-linux-gnueabi/8.3.0/real-ld: 
> /opt/mydistro/1.0.0/sysroots/cortexa9t2hf-neon-poky-linux-gnueabi/usr/lib/libc.a(getcontext.o): 
> in function `getcontext':
> /usr/src/debug/glibc/2.29-r0/git/stdlib/../sysdeps/unix/sysv/linux/arm/getcontext.S:101: 
> undefined reference to `_rtld_global_ro'
> /opt/mydistro/1.0.0/sysroots/x86_64-pokysdk-linux/usr/libexec/arm-poky-linux-gnueabi/gcc/arm-poky-linux-gnueabi/8.3.0/real-ld: 
> /opt/mydistro/1.0.0/sysroots/cortexa9t2hf-neon-poky-linux-gnueabi/usr/lib/libc.a(setcontext.o): 
> in function `__startcontext':
> /usr/src/debug/glibc/2.29-r0/git/stdlib/../sysdeps/unix/sysv/linux/arm/setcontext.S:100: 
> undefined reference to `_rtld_global_ro'
> collect2: error: ld returned 1 exit status
> makefile:116: recipe for target 'ortable' failed
> make: *** [ortable] Error 1
> </snip>
> 
> What I can see from the output is, that both getcontext.S and 
> setcontext.S are referencing to "_rtld_global_ro". What I do not 
> understand is, why the glibc is located in the debug folder? Is this 
> probably the issue?
> 

it seems static apps with glibc compiled with PIE related. Can you 
verfiy if you get same issue with aarch64 or mips ?

> I have sourced the SDK using following command:
> source 
> /opt/mydistro/1.0.0/environment-setup-cortexa9t2hf-neon-poky-linux-gnueabi
> 
> Here's image bb file (which I have used for building the SDK using this 
> command (bitbake my-image -c populate_sdk).
> 
> require recipes-extended/images/core-image-full-cmdline.bb
> IMAGE_INSTALL_append = " \
>      emmy-w1-driver-sdiosdio \
>      emmy-w1-systemd \
>      eth-systemd \
>      can-systemd \
>      can-utils \
>      lighttpd \
>      dnsmasq \
>      parted \
>      swupdate \
>      swupdate-www \
>      u-boot-fw-utils \
>      linux-firmware-imx-sdma-imx6q \
>      "
> TOOLCHAIN_HOST_TASK_append = " nativesdk-perl-modules"
> SDKIMAGE_FEATURES_append = " staticdev-pkgs"
> Any help on resolving this issue would be greatly appreciated.
> 
> Thanks.
> -- 
> 
> Rob
> 
> 
>