[libcamera-devel] [PATCH v8] Add alternative meson install command

[paul.elder at ideasonboard.com]

Hi Vedant,

On Wed, Mar 31, 2021 at 12:46:00PM +0530, Vedant Paranjape wrote:
> While installing meson using pip3 install --user meson, due to python
> path issues, build.ninja can't be located by ninja. meson generates
> ninja files fine, but then when you run ninja, it is unable to find
> meson's build.ninja python module due to path issues.
> It gives the following error on ninja -C build install:
> 
> ninja: Entering directory `build'
> ninja: error: loading 'build.ninja': No such file or directory
> 
> After uninstalling meson using pip3 and installing it again using pip
> without --user argument solved the issue.
> 
> Signed-off-by: Vedant Paranjape <vedantparanjape160201 at gmail.com>
> ---
> Changes in v8:
> * Updated README.rst to describe meson install issue
> * Removed "changelog" heading from commit message
> * Fixed few grammatical mistakes
> * Reworded few sentences
> * Fixed line width issues and some grammatical mistakes
> * Added a troubleshooting section to the readme to describe this issue and 
> suggest possible solutions.

I meant in the changelog, not here (not sure what this section is called
actually). Also s/Added/Add/

With this fixed,

Reviewed-by: Paul Elder <paul.elder at ideasonboard.com>

> 
>  README.rst | 22 ++++++++++++++++++++++
>  1 file changed, 22 insertions(+)
> 
> diff --git a/README.rst b/README.rst
> index 1427c714..5ebe3938 100644
> --- a/README.rst
> +++ b/README.rst
> @@ -104,3 +104,25 @@ onto the default video display element on your system.
>    gst-launch-1.0 libcamerasrc camera-name="Camera 1" ! videoconvert ! autovideosink
>  
>  .. section-end-getting-started
> +
> +Troubleshooting
> +~~~~~~~~~~~~~~~
> +
> +Several users have reported issues with meson installation, crux of the issue
> +is a potential version mismatch between the version that root uses, and the
> +version that the normal user uses. On calling `ninja -C build`, it can't find
> +the build.ninja module. This is a snippet of the error message.
> +
> +:: 
> +
> +  ninja: Entering directory `build'     
> +  ninja: error: loading 'build.ninja': No such file or directory
> +
> +This can be solved in two ways: 
> +
> +1) Don't install meson again if it is already installed system-wide. 
> +
> +2) If a version of meson which is different from the system-wide version is
> +already installed, uninstall that meson using pip3, and install again without
> +the --user argument.
> +
> -- 
> 2.25.1
> 
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