Wind River Support Network

Description

 32bit applications issues on new LTS21 64bit BSP which didn´t appear on old LTS18 64bit system.

When start debugging any of the applications with gdb on the target I get:

warning: Unable to find libthread_db matching inferior's thread library, thread debugging will not be available.

The customer said that libthread_db is available on the system. 

Steps to Reproduce

1.  $ git clone --branch WRLINUX_10_21_LTS https://gateway.delivers.windriver.com/git/linux-lts/release/wrlinux-lts.21/WRLinux-lts-21-Core/wrlinux-x

2.  $ ./wrlinux-x/setup.sh --machines intel-x86-64 --dl-layers

3.  $ . environment-setup-x86_64-wrlinuxsdk-linux 
     $ . oe-init-build-env wrl-intel-x86-64

4. add the following to conf/local.conf
WRTEMPLATE += " feature/busybox"
WRTEMPLATE += " feature/debug"
IMAGE_GEN_DEBUGFS = "1"
IMAGE_INSTALL_append = " lib32-libstdc++"

5.  $ bitbake wrlinux-image-small
     $ bitbake wrlinux-image-small -c populate_sdk

6 .Write the wic to USB key and start system from this device

7. Install the SDK to a development host in the directory /opt/windriver/sdk-x86-wr
Create sysroot directory on the development host using the archives from the build:
mkdir /home/developer/gdbtest/sysroot
cd /home/developer/gdbtest/sysroot
tar xf wrlinux-image-small-intel-x86-64.tar.bz2
tar xf wrlinux-image-small-intel-x86-64-dbg.tar.gz

8. Create a test program threadtest.cpp:

#include <iostream>
#include <thread>

int main()
{
std::thread thr{[]() {
std::cout << "Hello, world!\n";
}};
thr.join();
}

9. Build the application as 64bit and 32bit application:

source /opt/windriver/sdk-x86-wr/environment-setup-corei7-32-wrsmllib32-linux
$CXX -g -ggdb -Og -o threadtest32 threadtest.cpp -pthread
exit

source /opt/windriver/sdk-x86-wr/environment-setup-corei7-64-wrs-linux
$CXX -g -ggdb -Og -o threadtest64 threadtest.cpp -pthread
exit

10. Copy both applications to the target system.
Both applications are able to run on the target

11. When I start debugging any of the applications with gdb on the target I get:

warning: Unable to find libthread_db matching inferior's thread library, thread debugging will not be available.