[libcamera-devel] [PATCH v6] Add alternative meson install command

[Vedant Paranjape]

Changes in v6:
* Updated README.rst to describe meson install issue
* Removed "changelog" heading from commit message
* Fixed few grammatical mistakes
* Reworded few sentences
* Added a new troubleshooting section in readme,
and shifted meson issue to that section

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>
---
 README.rst | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/README.rst b/README.rst
index 1427c714..fff67762 100644
--- a/README.rst
+++ b/README.rst
@@ -104,3 +104,22 @@ 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 the snippet of 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 meson which is different from system-wide is already installed, 
+uninstall that meson using pip3, and install again without the --user 
+argument.
\ No newline at end of file
-- 
2.25.1