Cannot locate libvips.so.42, now on Red Hat Linux 9 (or RHEL 9)

I’m using the following set of instructions to install all the dependencies for Red Hat Linux 9 (or RHEL 9):

-------------------------------------- Install PyVips ----------------------------------------
$ su root
# dnf install python-requests
# dnf install python-pip
# dnf install python-wheel
# subscription-manager repos --enable codeready-builder-for-rhel-9-x86_64-rpms
# exit

$ pip install pyvips

----------------------------------------- Install LibVips -------------------------------------
$ su root

# subscription-manager repos --enable codeready-builder-for-rhel-9-$(arch)-rpms
# dnf install https://dl.fedoraproject.org/pub/epel/epel-release-latest-9.noarch.rpm
# dnf upgrade
# dnf install snapd
# systemctl enable --now snapd.socket
# ln -s /var/lib/snapd/snap /snap

logout/reboot RHEL9

$ su root
# snap wait system seed.loaded
# snap install libvips

--------------------------------- Run the wind.py app -------------------------------
Go to the app folder first, then

$ python wind.py

My Python app runs perfectly under Windows: https://github.com/nakigoe/sea/tree/main/graph_wind_create But under RHEL 9 (Red Hat Linux 9) an infamous error pops up: Cannot locate libvips.so.42

[kleisauke]

Here are some instructions to install libvips on RHEL 9 (and its derivatives) via Remi’s RPM repository.

# Install the EPEL repository configuration package
dnf install https://dl.fedoraproject.org/pub/epel/epel-release-latest-9.noarch.rpm

# Enable the CodeReady Builder repository since EPEL packages may depend on packages from it
crb enable
# or:
# subscription-manager repos --enable codeready-builder-for-rhel-9-$(arch)-rpms

# Install the Remi repository configuration package
dnf install https://rpms.remirepo.net/enterprise/remi-release-9.rpm

# Enable Remi's RPM repository
dnf config-manager --set-enabled remi

# Install libvips (+ development files and command-line tools)
dnf install vips vips-devel vips-tools

Optional modules

## Install optional modules
## See: https://github.com/remicollet/remirepo/issues/171

# HEIC / AVIF support via libheif
dnf install --nogpgcheck https://mirrors.rpmfusion.org/free/el/rpmfusion-free-release-9.noarch.rpm
dnf install vips-heif

# JPEG-XL support via libjxl
dnf install vips-jxl

# *Magick support via GraphicsMagick
dnf install vips-magick-gm

# *Magick support via ImageMagick 6
dnf install vips-magick-im6

# *Magick support via ImageMagick 7
dnf install vips-magick-im7

# OpenSlide support
dnf install vips-openslide

# PDF load support via Poppler
dnf install vips-poppler

See https://github.com/libvips/libvips/issues/1184#issuecomment-447973135 for reasons why libvips isn’t included in EPEL. Personally, I would use AlmaLinux or Rocky Linux because I don’t like subscription-managed distributions.

[nakigoe]

• Removing pyvips both from the normal user $ pip uninstall pyvips and the root user # pip uninstall pyvips • manually clearing the pip cache by finding it with pip cache dir • installing pyvips from the usual user $ pip install pyvips solved the issue. The output of $ python test.py k2.jpg:

DEBUG:pyvips:Loaded binary module _libvips
DEBUG:pyvips:Module generated for libvips 8.13
DEBUG:pyvips:Linked to libvips 8.13
DEBUG:pyvips:Inited libvips
test Image
DEBUG:pyvips.voperation:VipsOperation.call: operation_name = VipsForeignLoadJpegFile
DEBUG:pyvips.voperation:VipsOperation.call: match_image = None
DEBUG:pyvips.vobject:VipsObject.set: name = filename, value = k2.jpg
DEBUG:pyvips.vobject:VipsObject.get: name = out
DEBUG:pyvips.vobject:VipsObject.get: name = interpretation
DEBUG:pyvips.vobject:VipsObject.get: name = width
DEBUG:pyvips.vobject:VipsObject.get: name = height
DEBUG:pyvips.vobject:VipsObject.get: name = format
DEBUG:pyvips.vobject:VipsObject.get: name = bands
DEBUG:pyvips.vobject:VipsObject.get: name = interpretation
DEBUG:pyvips.voperation:VipsOperation.call: result = <pyvips.Image 3008x2000 uchar, 3 bands, srgb>
DEBUG:pyvips.vobject:VipsObject.get: name = interpretation
DEBUG:pyvips.vobject:VipsObject.get: name = width
DEBUG:pyvips.vobject:VipsObject.get: name = height
DEBUG:pyvips.vobject:VipsObject.get: name = format
DEBUG:pyvips.vobject:VipsObject.get: name = bands
DEBUG:pyvips.vobject:VipsObject.get: name = interpretation
image = <pyvips.Image 3008x2000 uchar, 3 bands, srgb>
DEBUG:pyvips.vobject:VipsObject.get: name = width
image.width = 3008

A huge thank you to @jcupitt and @kleisauke for the fast-paced help and patience!!!