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fix all absolute links in <rootfs_path>/usr/lib/arm-linux-gnueabihf #4

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28029d0
fix all absolute links in <rootfs_path>/usr/lib/arm-linux-gnueabihf
hoolheart Jul 2, 2023
195f937
use awk instead of cut to get invalid link info, use "--parallel" ins…
hoolheart Jul 2, 2023
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43 changes: 26 additions & 17 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -19,7 +19,7 @@ for remote debugging with Eclipse.
The script named `bbb-env-set.sh` takes care of some of the steps specified here for convenience.
Instructions for an Ubuntu host:

1. You can download a cross-compile toolchain built with `crosstool-ng` from
1. You can download a cross-compile toolchain built with `crosstool-ng` from
[here](https://www.dropbox.com/sh/gn9bo472yalknra/AABOghC1ym1CmjL8_XZSzGdma?dl=0).
Alternatively, you can also download the one provided by Linaro from
[here](https://releases.linaro.org/components/toolchain/binaries/latest-7/arm-linux-gnueabihf/).
Expand All @@ -39,7 +39,7 @@ Instructions for an Ubuntu host:
```

3. It is assumed the root filesystem is located somewhere on the host machine (see [rootfs](#rootfs)
chapter for more information how to do this). Set in in an environmental variable which
chapter for more information how to do this). Set in in an environmental variable which
`CMake` can use

```sh
Expand All @@ -49,12 +49,13 @@ Instructions for an Ubuntu host:
Note that you can add the commands in step 2 and step 3 to the `~/.bashrc` to set the path
and the environment variable up permanently.

4. Build the application using CMake. Run the following commands inside the repository
4. Build the application using CMake. Run the following commands inside the repository, the
parallel count can be changed according actual CPU specification.

```sh
mkdir build && cd build
cmake ..
cmake --build . -j
cmake --build . --parallel 4
chmod +x hello
```

Expand Down Expand Up @@ -86,7 +87,7 @@ pacman -S mingw-w64-x86_64-cmake mingw-w64-x86_64-make rsync
You can also run `pacman -S mingw-w64-x86_64-toolchain` to install the full build chain with
`gcc` and `g++`

1. Install the correct
1. Install the correct
[ARM Linux cross-compile toolchain](https://releases.linaro.org/components/toolchain/binaries/latest-7/arm-linux-gnueabihf/)
provided by Linaro and unzip it somewhere. Copy the path to the `bin` folder.

Expand All @@ -104,7 +105,7 @@ You can also run `pacman -S mingw-w64-x86_64-toolchain` to install the full buil
```

3. It is assumed the root filesystem is located somewhere on the host machine (see [rootfs](#rootfs)
chapter for more information how to do this). Set in in an environmental variable which
chapter for more information how to do this). Set in in an environmental variable which
`CMake` can use

```sh
Expand All @@ -114,15 +115,16 @@ You can also run `pacman -S mingw-w64-x86_64-toolchain` to install the full buil
Note that you can add the commands in step 2 and step 3 to the `~/.bashrc` to set the path
and the environment variable up permanently

4. Build the application using CMake. Run the following commands inside the repository
4. Build the application using CMake. Run the following commands inside the repository, the
parallel count can be changed according actual CPU specification

```sh
mkdir build && cd build
cmake -G "MinGW Makefiles" ..
cmake --build . -j
cmake --build . --parallel 4
chmod +x hello
```

5. Transfer to application to the Beaglebone Black and run it to test it

```sh
Expand Down Expand Up @@ -163,7 +165,7 @@ on [this guide](https://wiki.eclipse.org/TCF/Raspberry_Pi)
obj/GNU/Linux/arm/Debug/agent –S
```

4. Finally install the agent for auto-start with the following steps. And set it up for
4. Finally install the agent for auto-start with the following steps. And set it up for
auto-start.

```sh
Expand All @@ -181,15 +183,15 @@ on [this guide](https://wiki.eclipse.org/TCF/Raspberry_Pi)

# Using Eclipse

1. Install Eclipse for C/C++ with the
1. Install Eclipse for C/C++ with the
[installer](https://www.eclipse.org/downloads/packages/installer)
2. Install the TCF agent plugin in Eclipse from the
[releases](https://www.eclipse.org/tcf/downloads.php). Go to
Help &rarr; Install New Software and use the download page, for
example https://download.eclipse.org/tools/tcf/releases/1.6/1.6.2/ to search
example https://download.eclipse.org/tools/tcf/releases/1.6/1.6.2/ to search
for the plugin and install it.
3. Eclipse project files were supplied to get started. You can copy the `.cproject` and `.project`
files to the system root and then add the repository as an Eclipse project to get started.
files to the system root and then add the repository as an Eclipse project to get started.
Only select the root folder check box here. The build system still needs to be generated from
command line, but you can build and debug the project conveniently in Eclipse after that.
4. Set the `LINUX_ROOTFS` Eclipse variable and the toolchain binary path correctly in the project
Expand Down Expand Up @@ -248,10 +250,17 @@ Run the following command to create a relative symlinks instead of an absolute o
to location might change to check it with `readlink` first before removing the symlinks:

```sh
rm libpthread.so
rm librt.so
ln -s ../../../lib/arm-linux-gnueabihf/libpthread.so.0 libpthread.so
ln -s ../../../lib/arm-linux-gnueabihf/librt.so.1 librt.so
link_name=
for item in `ll | grep ' -> /lib/arm-' | awk '{print $9" "$11}'`; do
if [ -z $link_name ]; then
link_name=$item
else
echo $link_name $item
rm $link_name
ln -s ../../..$item $link_name
link_name=
fi
done
```

For more information on issues which can occur when cloning the root filesystem,
Expand Down