I'm getting the following error during installation.

[omue999]

Raspberry PI Trixie...
I'm getting the following error during installation.
What am I doing wrong?

The Meson build system
Version: 1.7.0
Source dir: /home/pi/libgpiod-2.3
Build dir: /home/pi/libgpiod-2.3/build
Build type: native build
Project name: libgpiod
Project version: 2.3
C compiler for the host machine: cc (gcc 14.2.0 "cc (Debian 14.2.0-19) 14.2.0")
C linker for the host machine: cc ld.bfd 2.44
C++ compiler for the host machine: c++ (gcc 14.2.0 "c++ (Debian 14.2.0-19) 14.2.0")
C++ linker for the host machine: c++ ld.bfd 2.44
Host machine cpu family: aarch64
Host machine cpu: aarch64
Found pkg-config: YES (/usr/bin/pkg-config) 1.8.1
Found CMake: /usr/bin/cmake (3.31.6)
Run-time dependency libedit found: NO (tried pkgconfig and cmake)
Run-time dependency libkmod found: NO (tried pkgconfig and cmake)
Run-time dependency mount found: NO (tried pkgconfig and cmake)
Run-time dependency threads found: YES
Run-time dependency glib-2.0 found: NO (tried pkgconfig and cmake)
Run-time dependency gio-2.0 found: NO (tried pkgconfig and cmake)
Run-time dependency catch2-with-main found: YES 3.7.1
Run-time dependency glib-2.0 found: NO (tried pkgconfig and cmake)
Run-time dependency gobject-2.0 found: NO (tried pkgconfig and cmake)
Run-time dependency gio-2.0 found: NO (tried pkgconfig and cmake)
Run-time dependency gio-unix-2.0 found: NO (tried pkgconfig and cmake)
Program glib-mkenums found: NO
Run-time dependency gudev-1.0 found: NO (tried pkgconfig and cmake)
Program gdbus-codegen found: NO
Run-time dependency gobject-introspection-1.0 found: NO (tried pkgconfig and cmake)
Program g-ir-scanner found: NO
Program g-ir-compiler found: NO
Run-time dependency systemd found: NO (tried pkgconfig and cmake)
Program help2man found: YES (/usr/bin/help2man)

../bindings/cxx/tests/meson.build:28:14: ERROR: Unknown variable "libgpiosim_lib".

Olaf

[brgl]

What is the entire command you're using?

[omue999]

as in your instructions

wget https://mirrors.edge.kernel.org/pub/software/libs/libgpiod/libgpiod-2.3.tar.xz
tar -xvf ./libgpiod-2.3.tar.xz
cd ./libgpiod-2.3/
mkdir build
cd build
meson setup .. -Dtools=enabled

[brgl]

$ wget https://mirrors.edge.kernel.org/pub/software/libs/libgpiod/libgpiod-2.3.tar.xz
tar -xvf ./libgpiod-2.3.tar.xz
cd ./libgpiod-2.3/
mkdir build
cd build
meson setup .. -Dtools=enabled
--2026-06-17 09:41:57--  https://mirrors.edge.kernel.org/pub/software/libs/libgpiod/libgpiod-2.3.tar.xz
Resolving mirrors.edge.kernel.org (mirrors.edge.kernel.org)... 2a01:60a::1994:3:14, 213.196.21.55
Connecting to mirrors.edge.kernel.org (mirrors.edge.kernel.org)|2a01:60a::1994:3:14|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 235416 (230K) [application/x-xz]
Saving to: ‘libgpiod-2.3.tar.xz’

libgpiod-2.3.tar.xz                                                      100%[=================================================================================================================================================================================>] 229.90K  --.-KB/s    in 0.1s    

2026-06-17 09:41:58 (1.51 MB/s) - ‘libgpiod-2.3.tar.xz’ saved [235416/235416]

libgpiod-2.3/
libgpiod-2.3/.gitignore
libgpiod-2.3/.mailmap
libgpiod-2.3/.readthedocs.yaml
libgpiod-2.3/CONTRIBUTING.md
libgpiod-2.3/COPYING
libgpiod-2.3/LICENSES/
libgpiod-2.3/LICENSES/Apache-2.0.txt
libgpiod-2.3/LICENSES/BSD-3-Clause.txt
libgpiod-2.3/LICENSES/CC-BY-SA-4.0.txt
libgpiod-2.3/LICENSES/CC0-1.0.txt
libgpiod-2.3/LICENSES/GPL-2.0-only.txt
libgpiod-2.3/LICENSES/GPL-2.0-or-later.txt
libgpiod-2.3/LICENSES/LGPL-2.1-or-later.txt
libgpiod-2.3/LICENSES/Linux-syscall-note.txt
libgpiod-2.3/NEWS
libgpiod-2.3/README.md
libgpiod-2.3/REUSE.toml
libgpiod-2.3/TODO
libgpiod-2.3/bindings/
libgpiod-2.3/bindings/cxx/
libgpiod-2.3/bindings/cxx/chip-info.cpp
libgpiod-2.3/bindings/cxx/chip.cpp
libgpiod-2.3/bindings/cxx/edge-event-buffer.cpp
libgpiod-2.3/bindings/cxx/edge-event.cpp
libgpiod-2.3/bindings/cxx/examples/
libgpiod-2.3/bindings/cxx/examples/async_watch_line_value.cpp
libgpiod-2.3/bindings/cxx/examples/find_line_by_name.cpp
libgpiod-2.3/bindings/cxx/examples/get_chip_info.cpp
libgpiod-2.3/bindings/cxx/examples/get_line_info.cpp
libgpiod-2.3/bindings/cxx/examples/get_line_value.cpp
libgpiod-2.3/bindings/cxx/examples/get_multiple_line_values.cpp
libgpiod-2.3/bindings/cxx/examples/meson.build
libgpiod-2.3/bindings/cxx/examples/reconfigure_input_to_output.cpp
libgpiod-2.3/bindings/cxx/examples/toggle_line_value.cpp
libgpiod-2.3/bindings/cxx/examples/toggle_multiple_line_values.cpp
libgpiod-2.3/bindings/cxx/examples/watch_line_info.cpp
libgpiod-2.3/bindings/cxx/examples/watch_line_rising.cpp
libgpiod-2.3/bindings/cxx/examples/watch_line_value.cpp
libgpiod-2.3/bindings/cxx/examples/watch_multiple_line_values.cpp
libgpiod-2.3/bindings/cxx/exception.cpp
libgpiod-2.3/bindings/cxx/gpiod.hpp
libgpiod-2.3/bindings/cxx/gpiodcxx/
libgpiod-2.3/bindings/cxx/gpiodcxx/chip-info.hpp
libgpiod-2.3/bindings/cxx/gpiodcxx/chip.hpp
libgpiod-2.3/bindings/cxx/gpiodcxx/edge-event-buffer.hpp
libgpiod-2.3/bindings/cxx/gpiodcxx/edge-event.hpp
libgpiod-2.3/bindings/cxx/gpiodcxx/exception.hpp
libgpiod-2.3/bindings/cxx/gpiodcxx/info-event.hpp
libgpiod-2.3/bindings/cxx/gpiodcxx/line-config.hpp
libgpiod-2.3/bindings/cxx/gpiodcxx/line-info.hpp
libgpiod-2.3/bindings/cxx/gpiodcxx/line-request.hpp
libgpiod-2.3/bindings/cxx/gpiodcxx/line-settings.hpp
libgpiod-2.3/bindings/cxx/gpiodcxx/line.hpp
libgpiod-2.3/bindings/cxx/gpiodcxx/misc.hpp
libgpiod-2.3/bindings/cxx/gpiodcxx/request-builder.hpp
libgpiod-2.3/bindings/cxx/gpiodcxx/request-config.hpp
libgpiod-2.3/bindings/cxx/gpiodcxx/timestamp.hpp
libgpiod-2.3/bindings/cxx/info-event.cpp
libgpiod-2.3/bindings/cxx/internal.cpp
libgpiod-2.3/bindings/cxx/internal.hpp
libgpiod-2.3/bindings/cxx/line-config.cpp
libgpiod-2.3/bindings/cxx/line-info.cpp
libgpiod-2.3/bindings/cxx/line-request.cpp
libgpiod-2.3/bindings/cxx/line-settings.cpp
libgpiod-2.3/bindings/cxx/line.cpp
libgpiod-2.3/bindings/cxx/meson.build
libgpiod-2.3/bindings/cxx/misc.cpp
libgpiod-2.3/bindings/cxx/request-builder.cpp
libgpiod-2.3/bindings/cxx/request-config.cpp
libgpiod-2.3/bindings/cxx/tests/
libgpiod-2.3/bindings/cxx/tests/check-kernel.cpp
libgpiod-2.3/bindings/cxx/tests/gpiod-cxx-test-main.cpp
libgpiod-2.3/bindings/cxx/tests/gpiosim.cpp
libgpiod-2.3/bindings/cxx/tests/gpiosim.hpp
libgpiod-2.3/bindings/cxx/tests/helpers.cpp
libgpiod-2.3/bindings/cxx/tests/helpers.hpp
libgpiod-2.3/bindings/cxx/tests/meson.build
libgpiod-2.3/bindings/cxx/tests/tests-chip-info.cpp
libgpiod-2.3/bindings/cxx/tests/tests-chip.cpp
libgpiod-2.3/bindings/cxx/tests/tests-edge-event.cpp
libgpiod-2.3/bindings/cxx/tests/tests-info-event.cpp
libgpiod-2.3/bindings/cxx/tests/tests-line-config.cpp
libgpiod-2.3/bindings/cxx/tests/tests-line-info.cpp
libgpiod-2.3/bindings/cxx/tests/tests-line-request.cpp
libgpiod-2.3/bindings/cxx/tests/tests-line-settings.cpp
libgpiod-2.3/bindings/cxx/tests/tests-line.cpp
libgpiod-2.3/bindings/cxx/tests/tests-misc.cpp
libgpiod-2.3/bindings/cxx/tests/tests-request-config.cpp
libgpiod-2.3/bindings/glib/
libgpiod-2.3/bindings/glib/chip-info.c
libgpiod-2.3/bindings/glib/chip.c
libgpiod-2.3/bindings/glib/edge-event.c
libgpiod-2.3/bindings/glib/error.c
libgpiod-2.3/bindings/glib/examples/
libgpiod-2.3/bindings/glib/examples/find_line_by_name_glib.c
libgpiod-2.3/bindings/glib/examples/get_chip_info_glib.c
libgpiod-2.3/bindings/glib/examples/get_line_info_glib.c
libgpiod-2.3/bindings/glib/examples/get_line_value_glib.c
libgpiod-2.3/bindings/glib/examples/get_multiple_line_values_glib.c
libgpiod-2.3/bindings/glib/examples/meson.build
libgpiod-2.3/bindings/glib/examples/reconfigure_input_to_output_glib.c
libgpiod-2.3/bindings/glib/examples/toggle_line_value_glib.c
libgpiod-2.3/bindings/glib/examples/toggle_multiple_line_values_glib.c
libgpiod-2.3/bindings/glib/examples/watch_line_info_glib.c
libgpiod-2.3/bindings/glib/examples/watch_line_value_glib.c
libgpiod-2.3/bindings/glib/examples/watch_multiple_edge_rising_glib.c
libgpiod-2.3/bindings/glib/generated-enums.c.template
libgpiod-2.3/bindings/glib/generated-enums.h.template
libgpiod-2.3/bindings/glib/gi-docgen.toml.in
libgpiod-2.3/bindings/glib/gpiod-glib/
libgpiod-2.3/bindings/glib/gpiod-glib/chip-info.h
libgpiod-2.3/bindings/glib/gpiod-glib/chip.h
libgpiod-2.3/bindings/glib/gpiod-glib/edge-event.h
libgpiod-2.3/bindings/glib/gpiod-glib/error.h
libgpiod-2.3/bindings/glib/gpiod-glib/info-event.h
libgpiod-2.3/bindings/glib/gpiod-glib/line-config.h
libgpiod-2.3/bindings/glib/gpiod-glib/line-info.h
libgpiod-2.3/bindings/glib/gpiod-glib/line-request.h
libgpiod-2.3/bindings/glib/gpiod-glib/line-settings.h
libgpiod-2.3/bindings/glib/gpiod-glib/line.h
libgpiod-2.3/bindings/glib/gpiod-glib/meson.build
libgpiod-2.3/bindings/glib/gpiod-glib/misc.h
libgpiod-2.3/bindings/glib/gpiod-glib/request-config.h
libgpiod-2.3/bindings/glib/gpiod-glib.h
libgpiod-2.3/bindings/glib/info-event.c
libgpiod-2.3/bindings/glib/internal.c
libgpiod-2.3/bindings/glib/internal.h
libgpiod-2.3/bindings/glib/line-config.c
libgpiod-2.3/bindings/glib/line-info.c
libgpiod-2.3/bindings/glib/line-request.c
libgpiod-2.3/bindings/glib/line-settings.c
libgpiod-2.3/bindings/glib/meson.build
libgpiod-2.3/bindings/glib/misc.c
libgpiod-2.3/bindings/glib/request-config.c
libgpiod-2.3/bindings/glib/tests/
libgpiod-2.3/bindings/glib/tests/helpers.c
libgpiod-2.3/bindings/glib/tests/helpers.h
libgpiod-2.3/bindings/glib/tests/meson.build
libgpiod-2.3/bindings/glib/tests/tests-chip-info.c
libgpiod-2.3/bindings/glib/tests/tests-chip.c
libgpiod-2.3/bindings/glib/tests/tests-edge-event.c
libgpiod-2.3/bindings/glib/tests/tests-info-event.c
libgpiod-2.3/bindings/glib/tests/tests-line-config.c
libgpiod-2.3/bindings/glib/tests/tests-line-info.c
libgpiod-2.3/bindings/glib/tests/tests-line-request.c
libgpiod-2.3/bindings/glib/tests/tests-line-settings.c
libgpiod-2.3/bindings/glib/tests/tests-misc.c
libgpiod-2.3/bindings/glib/tests/tests-request-config.c
libgpiod-2.3/bindings/meson.build
libgpiod-2.3/bindings/python/
libgpiod-2.3/bindings/python/.gitignore
libgpiod-2.3/bindings/python/CHANGELOG.md
libgpiod-2.3/bindings/python/MANIFEST.in
libgpiod-2.3/bindings/python/README.md
libgpiod-2.3/bindings/python/build_tests.py
libgpiod-2.3/bindings/python/examples/
libgpiod-2.3/bindings/python/examples/async_watch_line_value.py
libgpiod-2.3/bindings/python/examples/find_line_by_name.py
libgpiod-2.3/bindings/python/examples/get_chip_info.py
libgpiod-2.3/bindings/python/examples/get_line_info.py
libgpiod-2.3/bindings/python/examples/get_line_value.py
libgpiod-2.3/bindings/python/examples/get_multiple_line_values.py
libgpiod-2.3/bindings/python/examples/reconfigure_input_to_output.py
libgpiod-2.3/bindings/python/examples/toggle_line_value.py
libgpiod-2.3/bindings/python/examples/toggle_multiple_line_values.py
libgpiod-2.3/bindings/python/examples/watch_line_info.py
libgpiod-2.3/bindings/python/examples/watch_line_rising.py
libgpiod-2.3/bindings/python/examples/watch_line_value.py
libgpiod-2.3/bindings/python/examples/watch_multiple_line_values.py
libgpiod-2.3/bindings/python/generate_pypi_artifacts.sh
libgpiod-2.3/bindings/python/gpiod/
libgpiod-2.3/bindings/python/gpiod/__init__.py
libgpiod-2.3/bindings/python/gpiod/_ext.pyi
libgpiod-2.3/bindings/python/gpiod/_internal.py
libgpiod-2.3/bindings/python/gpiod/chip.py
libgpiod-2.3/bindings/python/gpiod/chip_info.py
libgpiod-2.3/bindings/python/gpiod/edge_event.py
libgpiod-2.3/bindings/python/gpiod/exception.py
libgpiod-2.3/bindings/python/gpiod/ext/
libgpiod-2.3/bindings/python/gpiod/ext/chip.c
libgpiod-2.3/bindings/python/gpiod/ext/common.c
libgpiod-2.3/bindings/python/gpiod/ext/internal.h
libgpiod-2.3/bindings/python/gpiod/ext/line-config.c
libgpiod-2.3/bindings/python/gpiod/ext/line-settings.c
libgpiod-2.3/bindings/python/gpiod/ext/module.c
libgpiod-2.3/bindings/python/gpiod/ext/request.c
libgpiod-2.3/bindings/python/gpiod/info_event.py
libgpiod-2.3/bindings/python/gpiod/line.py
libgpiod-2.3/bindings/python/gpiod/line_info.py
libgpiod-2.3/bindings/python/gpiod/line_request.py
libgpiod-2.3/bindings/python/gpiod/line_settings.py
libgpiod-2.3/bindings/python/gpiod/meson.build
libgpiod-2.3/bindings/python/gpiod/py.typed
libgpiod-2.3/bindings/python/gpiod/version.py
libgpiod-2.3/bindings/python/meson.build
libgpiod-2.3/bindings/python/pyproject.toml
libgpiod-2.3/bindings/python/setup.py
libgpiod-2.3/bindings/python/tests/
libgpiod-2.3/bindings/python/tests/__init__.py
libgpiod-2.3/bindings/python/tests/__main__.py
libgpiod-2.3/bindings/python/tests/gpiosim/
libgpiod-2.3/bindings/python/tests/gpiosim/__init__.py
libgpiod-2.3/bindings/python/tests/gpiosim/_ext.pyi
libgpiod-2.3/bindings/python/tests/gpiosim/chip.py
libgpiod-2.3/bindings/python/tests/gpiosim/ext.c
libgpiod-2.3/bindings/python/tests/gpiosim/meson.build
libgpiod-2.3/bindings/python/tests/helpers.py
libgpiod-2.3/bindings/python/tests/meson.build
libgpiod-2.3/bindings/python/tests/system/
libgpiod-2.3/bindings/python/tests/system/__init__.py
libgpiod-2.3/bindings/python/tests/system/_ext.pyi
libgpiod-2.3/bindings/python/tests/system/ext.c
libgpiod-2.3/bindings/python/tests/system/meson.build
libgpiod-2.3/bindings/python/tests/tests_chip.py
libgpiod-2.3/bindings/python/tests/tests_chip_info.py
libgpiod-2.3/bindings/python/tests/tests_edge_event.py
libgpiod-2.3/bindings/python/tests/tests_info_event.py
libgpiod-2.3/bindings/python/tests/tests_line.py
libgpiod-2.3/bindings/python/tests/tests_line_info.py
libgpiod-2.3/bindings/python/tests/tests_line_request.py
libgpiod-2.3/bindings/python/tests/tests_line_settings.py
libgpiod-2.3/bindings/python/tests/tests_module.py
libgpiod-2.3/bindings/python/tests/tests_threading.py
libgpiod-2.3/bindings/rust/
libgpiod-2.3/bindings/rust/.gitignore
libgpiod-2.3/bindings/rust/Cargo.toml
libgpiod-2.3/bindings/rust/gpiosim-sys/
libgpiod-2.3/bindings/rust/gpiosim-sys/Cargo.toml
libgpiod-2.3/bindings/rust/gpiosim-sys/README.md
libgpiod-2.3/bindings/rust/gpiosim-sys/build.rs
libgpiod-2.3/bindings/rust/gpiosim-sys/src/
libgpiod-2.3/bindings/rust/gpiosim-sys/src/lib.rs
libgpiod-2.3/bindings/rust/gpiosim-sys/src/sim.rs
libgpiod-2.3/bindings/rust/libgpiod/
libgpiod-2.3/bindings/rust/libgpiod/Cargo.toml
libgpiod-2.3/bindings/rust/libgpiod/README.md
libgpiod-2.3/bindings/rust/libgpiod/examples/
libgpiod-2.3/bindings/rust/libgpiod/examples/buffered_event_lifetimes.rs
libgpiod-2.3/bindings/rust/libgpiod/examples/find_line_by_name.rs
libgpiod-2.3/bindings/rust/libgpiod/examples/get_chip_info.rs
libgpiod-2.3/bindings/rust/libgpiod/examples/get_line_info.rs
libgpiod-2.3/bindings/rust/libgpiod/examples/get_line_value.rs
libgpiod-2.3/bindings/rust/libgpiod/examples/get_multiple_line_values.rs
libgpiod-2.3/bindings/rust/libgpiod/examples/reconfigure_input_to_output.rs
libgpiod-2.3/bindings/rust/libgpiod/examples/toggle_line_value.rs
libgpiod-2.3/bindings/rust/libgpiod/examples/toggle_multiple_line_values.rs
libgpiod-2.3/bindings/rust/libgpiod/examples/watch_line_info.rs
libgpiod-2.3/bindings/rust/libgpiod/examples/watch_line_rising.rs
libgpiod-2.3/bindings/rust/libgpiod/examples/watch_line_value.rs
libgpiod-2.3/bindings/rust/libgpiod/examples/watch_multiple_line_values.rs
libgpiod-2.3/bindings/rust/libgpiod/src/
libgpiod-2.3/bindings/rust/libgpiod/src/chip.rs
libgpiod-2.3/bindings/rust/libgpiod/src/edge_event.rs
libgpiod-2.3/bindings/rust/libgpiod/src/event_buffer.rs
libgpiod-2.3/bindings/rust/libgpiod/src/info_event.rs
libgpiod-2.3/bindings/rust/libgpiod/src/lib.rs
libgpiod-2.3/bindings/rust/libgpiod/src/line_config.rs
libgpiod-2.3/bindings/rust/libgpiod/src/line_info.rs
libgpiod-2.3/bindings/rust/libgpiod/src/line_request.rs
libgpiod-2.3/bindings/rust/libgpiod/src/line_settings.rs
libgpiod-2.3/bindings/rust/libgpiod/src/request_config.rs
libgpiod-2.3/bindings/rust/libgpiod/tests/
libgpiod-2.3/bindings/rust/libgpiod/tests/chip.rs
libgpiod-2.3/bindings/rust/libgpiod/tests/common/
libgpiod-2.3/bindings/rust/libgpiod/tests/common/config.rs
libgpiod-2.3/bindings/rust/libgpiod/tests/common/mod.rs
libgpiod-2.3/bindings/rust/libgpiod/tests/edge_event.rs
libgpiod-2.3/bindings/rust/libgpiod/tests/info_event.rs
libgpiod-2.3/bindings/rust/libgpiod/tests/line_config.rs
libgpiod-2.3/bindings/rust/libgpiod/tests/line_info.rs
libgpiod-2.3/bindings/rust/libgpiod/tests/line_request.rs
libgpiod-2.3/bindings/rust/libgpiod/tests/line_settings.rs
libgpiod-2.3/bindings/rust/libgpiod/tests/request_config.rs
libgpiod-2.3/bindings/rust/libgpiod-sys/
libgpiod-2.3/bindings/rust/libgpiod-sys/Cargo.toml
libgpiod-2.3/bindings/rust/libgpiod-sys/README.md
libgpiod-2.3/bindings/rust/libgpiod-sys/build.rs
libgpiod-2.3/bindings/rust/libgpiod-sys/src/
libgpiod-2.3/bindings/rust/libgpiod-sys/src/lib.rs
libgpiod-2.3/bindings/rust/libgpiod-sys/wrapper.h
libgpiod-2.3/bindings/rust/meson.build
libgpiod-2.3/contrib/
libgpiod-2.3/contrib/Android.bp
libgpiod-2.3/dbus/
libgpiod-2.3/dbus/client/
libgpiod-2.3/dbus/client/common.c
libgpiod-2.3/dbus/client/common.h
libgpiod-2.3/dbus/client/detect.c
libgpiod-2.3/dbus/client/find.c
libgpiod-2.3/dbus/client/get.c
libgpiod-2.3/dbus/client/gpiocli-test.bash
libgpiod-2.3/dbus/client/gpiocli.c
libgpiod-2.3/dbus/client/info.c
libgpiod-2.3/dbus/client/meson.build
libgpiod-2.3/dbus/client/monitor.c
libgpiod-2.3/dbus/client/notify.c
libgpiod-2.3/dbus/client/reconfigure.c
libgpiod-2.3/dbus/client/release.c
libgpiod-2.3/dbus/client/request.c
libgpiod-2.3/dbus/client/requests.c
libgpiod-2.3/dbus/client/set.c
libgpiod-2.3/dbus/client/wait.c
libgpiod-2.3/dbus/data/
libgpiod-2.3/dbus/data/90-gpio.rules
libgpiod-2.3/dbus/data/gpio-manager.service.in
libgpiod-2.3/dbus/data/io.gpiod1.conf
libgpiod-2.3/dbus/data/meson.build
libgpiod-2.3/dbus/lib/
libgpiod-2.3/dbus/lib/gpiodbus.h
libgpiod-2.3/dbus/lib/io.gpiod1.xml
libgpiod-2.3/dbus/lib/meson.build
libgpiod-2.3/dbus/manager/
libgpiod-2.3/dbus/manager/daemon.c
libgpiod-2.3/dbus/manager/daemon.h
libgpiod-2.3/dbus/manager/gpio-manager.c
libgpiod-2.3/dbus/manager/helpers.c
libgpiod-2.3/dbus/manager/helpers.h
libgpiod-2.3/dbus/manager/meson.build
libgpiod-2.3/dbus/meson.build
libgpiod-2.3/dbus/tests/
libgpiod-2.3/dbus/tests/daemon-process.c
libgpiod-2.3/dbus/tests/daemon-process.h
libgpiod-2.3/dbus/tests/helpers.c
libgpiod-2.3/dbus/tests/helpers.h
libgpiod-2.3/dbus/tests/meson.build
libgpiod-2.3/dbus/tests/tests-chip.c
libgpiod-2.3/dbus/tests/tests-line.c
libgpiod-2.3/dbus/tests/tests-request.c
libgpiod-2.3/docs/
libgpiod-2.3/docs/.gitignore
libgpiod-2.3/docs/Doxyfile
libgpiod-2.3/docs/bindings.rst
libgpiod-2.3/docs/building.rst
libgpiod-2.3/docs/conf.py
libgpiod-2.3/docs/contributing.rst
libgpiod-2.3/docs/core_api.rst
libgpiod-2.3/docs/core_chip_info.rst
libgpiod-2.3/docs/core_chips.rst
libgpiod-2.3/docs/core_edge_event.rst
libgpiod-2.3/docs/core_line_config.rst
libgpiod-2.3/docs/core_line_defs.rst
libgpiod-2.3/docs/core_line_info.rst
libgpiod-2.3/docs/core_line_request.rst
libgpiod-2.3/docs/core_line_settings.rst
libgpiod-2.3/docs/core_line_watch.rst
libgpiod-2.3/docs/core_misc.rst
libgpiod-2.3/docs/core_request_config.rst
libgpiod-2.3/docs/cpp_api.rst
libgpiod-2.3/docs/cpp_chip.rst
libgpiod-2.3/docs/cpp_chip_info.rst
libgpiod-2.3/docs/cpp_edge_event.rst
libgpiod-2.3/docs/cpp_edge_event_buffer.rst
libgpiod-2.3/docs/cpp_exceptions.rst
libgpiod-2.3/docs/cpp_info_event.rst
libgpiod-2.3/docs/cpp_line.rst
libgpiod-2.3/docs/cpp_line_config.rst
libgpiod-2.3/docs/cpp_line_info.rst
libgpiod-2.3/docs/cpp_line_request.rst
libgpiod-2.3/docs/cpp_line_settings.rst
libgpiod-2.3/docs/cpp_misc.rst
libgpiod-2.3/docs/cpp_request_config.rst
libgpiod-2.3/docs/dbus.rst
libgpiod-2.3/docs/dbus_api.rst
libgpiod-2.3/docs/glib_api.rst
libgpiod-2.3/docs/gpio_tools.rst
libgpiod-2.3/docs/gpio_tools_lib.rst
libgpiod-2.3/docs/gpiocli_top.rst
libgpiod-2.3/docs/index.rst
libgpiod-2.3/docs/python_api.rst
libgpiod-2.3/docs/python_chip.rst
libgpiod-2.3/docs/python_chip_info.rst
libgpiod-2.3/docs/python_edge_event.rst
libgpiod-2.3/docs/python_exceptions.rst
libgpiod-2.3/docs/python_info_event.rst
libgpiod-2.3/docs/python_line.rst
libgpiod-2.3/docs/python_line_info.rst
libgpiod-2.3/docs/python_line_request.rst
libgpiod-2.3/docs/python_line_settings.rst
libgpiod-2.3/docs/python_misc.rst
libgpiod-2.3/docs/requirements.txt
libgpiod-2.3/docs/rust_api.rst
libgpiod-2.3/docs/testing.rst
libgpiod-2.3/examples/
libgpiod-2.3/examples/async_watch_line_value.c
libgpiod-2.3/examples/find_line_by_name.c
libgpiod-2.3/examples/get_chip_info.c
libgpiod-2.3/examples/get_line_info.c
libgpiod-2.3/examples/get_line_value.c
libgpiod-2.3/examples/get_multiple_line_values.c
libgpiod-2.3/examples/meson.build
libgpiod-2.3/examples/reconfigure_input_to_output.c
libgpiod-2.3/examples/toggle_line_value.c
libgpiod-2.3/examples/toggle_multiple_line_values.c
libgpiod-2.3/examples/watch_line_info.c
libgpiod-2.3/examples/watch_line_rising.c
libgpiod-2.3/examples/watch_line_value.c
libgpiod-2.3/examples/watch_multiple_line_values.c
libgpiod-2.3/include/
libgpiod-2.3/include/gpiod.h
libgpiod-2.3/include/meson.build
libgpiod-2.3/lib/
libgpiod-2.3/lib/chip-info.c
libgpiod-2.3/lib/chip.c
libgpiod-2.3/lib/edge-event.c
libgpiod-2.3/lib/info-event.c
libgpiod-2.3/lib/internal.c
libgpiod-2.3/lib/internal.h
libgpiod-2.3/lib/line-config.c
libgpiod-2.3/lib/line-info.c
libgpiod-2.3/lib/line-request.c
libgpiod-2.3/lib/line-settings.c
libgpiod-2.3/lib/meson.build
libgpiod-2.3/lib/misc.c
libgpiod-2.3/lib/request-config.c
libgpiod-2.3/lib/uapi/
libgpiod-2.3/lib/uapi/gpio.h
libgpiod-2.3/man/
libgpiod-2.3/man/meson.build
libgpiod-2.3/man/template
libgpiod-2.3/meson.build
libgpiod-2.3/meson_options.txt
libgpiod-2.3/tests/
libgpiod-2.3/tests/gpiosim/
libgpiod-2.3/tests/gpiosim/gpiosim-selftest.c
libgpiod-2.3/tests/gpiosim/gpiosim.c
libgpiod-2.3/tests/gpiosim/gpiosim.h
libgpiod-2.3/tests/gpiosim/meson.build
libgpiod-2.3/tests/gpiosim-glib/
libgpiod-2.3/tests/gpiosim-glib/gpiosim-glib.c
libgpiod-2.3/tests/gpiosim-glib/gpiosim-glib.h
libgpiod-2.3/tests/gpiosim-glib/meson.build
libgpiod-2.3/tests/harness/
libgpiod-2.3/tests/harness/gpiod-test-common.h
libgpiod-2.3/tests/harness/gpiod-test.c
libgpiod-2.3/tests/harness/gpiod-test.h
libgpiod-2.3/tests/harness/meson.build
libgpiod-2.3/tests/helpers.h
libgpiod-2.3/tests/meson.build
libgpiod-2.3/tests/scripts/
libgpiod-2.3/tests/scripts/gpiod-bash-test-helper.inc
libgpiod-2.3/tests/tests-chip-info.c
libgpiod-2.3/tests/tests-chip.c
libgpiod-2.3/tests/tests-edge-event.c
libgpiod-2.3/tests/tests-info-event.c
libgpiod-2.3/tests/tests-kernel-uapi.c
libgpiod-2.3/tests/tests-line-config.c
libgpiod-2.3/tests/tests-line-info.c
libgpiod-2.3/tests/tests-line-request.c
libgpiod-2.3/tests/tests-line-settings.c
libgpiod-2.3/tests/tests-misc.c
libgpiod-2.3/tests/tests-request-config.c
libgpiod-2.3/tools/
libgpiod-2.3/tools/gpio-tools-test.bash
libgpiod-2.3/tools/gpiodetect.c
libgpiod-2.3/tools/gpioget.c
libgpiod-2.3/tools/gpioinfo.c
libgpiod-2.3/tools/gpiomon.c
libgpiod-2.3/tools/gpionotify.c
libgpiod-2.3/tools/gpioset.c
libgpiod-2.3/tools/gpiotools.c
libgpiod-2.3/tools/gpiotools.h
libgpiod-2.3/tools/meson.build
libgpiod-2.3/tools/tools-common.c
libgpiod-2.3/tools/tools-common.h
The Meson build system
Version: 1.7.0
Source dir: /tmp/libgpiod-2.3
Build dir: /tmp/libgpiod-2.3/build
Build type: native build
Project name: libgpiod
Project version: 2.3
C compiler for the host machine: cc (gcc 14.2.0 "cc (Debian 14.2.0-19) 14.2.0")
C linker for the host machine: cc ld.bfd 2.44
C++ compiler for the host machine: c++ (gcc 14.2.0 "c++ (Debian 14.2.0-19) 14.2.0")
C++ linker for the host machine: c++ ld.bfd 2.44
Host machine cpu family: x86_64
Host machine cpu: x86_64
Found pkg-config: YES (/usr/bin/pkg-config) 1.8.1
Run-time dependency libedit found: YES 3.1
Run-time dependency libkmod found: YES 34.2
Run-time dependency mount found: YES 2.41.0
Run-time dependency threads found: YES
Run-time dependency glib-2.0 found: YES 2.84.4
Run-time dependency gio-2.0 found: YES 2.84.4
Run-time dependency catch2-with-main found: YES 3.7.1
Dependency glib-2.0 found: YES 2.84.4 (cached)
Run-time dependency gobject-2.0 found: YES 2.84.4
Dependency gio-2.0 found: YES 2.84.4 (cached)
Run-time dependency gio-unix-2.0 found: YES 2.84.4
Program glib-mkenums found: YES (/usr/bin/glib-mkenums)
Run-time dependency gudev-1.0 found: YES 238
Program gdbus-codegen found: YES (/usr/bin/gdbus-codegen)
Run-time dependency gobject-introspection-1.0 found: YES 1.84.0
Program g-ir-scanner found: YES (/usr/bin/g-ir-scanner)
Program g-ir-compiler found: YES (/usr/bin/g-ir-compiler)
Run-time dependency systemd found: YES 257
Program help2man found: YES (/usr/bin/help2man)
Configuring gi-docgen.toml using configuration
Dependency gobject-introspection-1.0 found: YES 1.84.0 (cached)
Dependency gobject-introspection-1.0 found: YES 1.84.0 (cached)
Program /usr/bin/x86_64-linux-gnu-g-ir-scanner found: YES (/usr/bin/x86_64-linux-gnu-g-ir-scanner)
Dependency gobject-introspection-1.0 found: YES 1.84.0 (cached)
Program /usr/bin/x86_64-linux-gnu-g-ir-compiler found: YES (/usr/bin/x86_64-linux-gnu-g-ir-compiler)
Configuring gpio-manager.service using configuration
Dependency gio-2.0 found: YES 2.84.4 (cached)
Program /usr/bin/gdbus-codegen found: YES (/usr/bin/gdbus-codegen)
Build targets in project: 53

libgpiod 2.3

  Components
    Tools                : YES
    Tests                : YES
    Examples             : NO
    D-Bus                : YES

  Bindings
    C++                  : YES
    Python               : NO
    Rust                 : NO
    GLib                 : YES

  Features
    gpioset interactive  : YES
    GObject introspection: YES
    systemd              : YES
    Profiling            : NO

  User defined options
    tools                : enabled

Found ninja-1.12.1 at /usr/bin/ninja

Works fine for me, what meson version are you on?

[omue999]

Meson-Version 1.7.0-1
I'm using Meson for the first time!
It looks exactly like yours.

tar -xvf ./libgpiod-2.3.tar.xz
libgpiod-2.3/
....
libgpiod-2.3/tools/tools-common.h

then come a bunch of "no"

meson setup .. -Dtools=enabled
The Meson build system
Version: 1.7.0
Source dir: /home/pi/libgpiod-2.3
Build dir: /home/pi/libgpiod-2.3/build
Build type: native build
Project name: libgpiod
Project version: 2.3
C compiler for the host machine: cc (gcc 14.2.0 "cc (Debian 14.2.0-19) 14.2.0")
C linker for the host machine: cc ld.bfd 2.44
C++ compiler for the host machine: c++ (gcc 14.2.0 "c++ (Debian 14.2.0-19) 14.2.0")
C++ linker for the host machine: c++ ld.bfd 2.44
Host machine cpu family: aarch64
Host machine cpu: aarch64
Found pkg-config: YES (/usr/bin/pkg-config) 1.8.1
Found CMake: /usr/bin/cmake (3.31.6)
Run-time dependency libedit found: NO (tried pkgconfig and cmake)
Run-time dependency libkmod found: NO (tried pkgconfig and cmake)
Run-time dependency mount found: NO (tried pkgconfig and cmake)
Run-time dependency threads found: YES
Run-time dependency glib-2.0 found: NO (tried pkgconfig and cmake)
Run-time dependency gio-2.0 found: NO (tried pkgconfig and cmake)
Run-time dependency catch2-with-main found: YES 3.7.1
Run-time dependency glib-2.0 found: NO (tried pkgconfig and cmake)
Run-time dependency gobject-2.0 found: NO (tried pkgconfig and cmake)
Run-time dependency gio-2.0 found: NO (tried pkgconfig and cmake)
Run-time dependency gio-unix-2.0 found: NO (tried pkgconfig and cmake)
Program glib-mkenums found: NO
Run-time dependency gudev-1.0 found: NO (tried pkgconfig and cmake)
Program gdbus-codegen found: NO
Run-time dependency gobject-introspection-1.0 found: NO (tried pkgconfig and cmake)
Program g-ir-scanner found: NO
Program g-ir-compiler found: NO
Run-time dependency systemd found: NO (tried pkgconfig and cmake)
Program help2man found: YES (/usr/bin/help2man)

../bindings/cxx/tests/meson.build:28:14: ERROR: Unknown variable "libgpiosim_lib".

[brgl]

Hmm, seems like you have tests enabled but the right packages aren't there. Can you install libkmod, libmount, gudev-1.0 glib-2.0, gio-2.0 development packages and try again? If it works then the meson.build script needs some tweaking for when tests are enabled but the requirements are not found.

[omue999]

It works after reinstalled it.

systemd
systemd-dev
kmod
libkmod2
libkmod-dev
python3-pip

Thanks!

[brgl]

I was able to reproduce it: the system must have catch2 headers but no libkmod-dev or gudev. I'll fix it.

[brgl]

The following change fixes it:

diff --git a/bindings/cxx/meson.build b/bindings/cxx/meson.build
index e93d686..dd976d4 100644
--- a/bindings/cxx/meson.build
+++ b/bindings/cxx/meson.build
@@ -69,6 +69,6 @@ if opt_examples.allowed()
   subdir('examples')
 endif
 
-if opt_tests.allowed()
+if tests_enabled
   subdir('tests')
 endif

but I need to make sure there are no other similar cases. Thanks for the report!

[omue999]

I wanted to install libgpiod-v2.3.x.tar on my test system.

When installing
libgpiod-v2.3.x.tar,

not only meson, ninja-build, and pkg-config
but also catch2 must be installed.

You had already written that.
You should also include it in the description: https://libgpiod.readthedocs.io/en/master/building.html

[brgl]

I wanted to install libgpiod-v2.3.x.tar on my test system.

When installing libgpiod-v2.3.x.tar,

not only meson, ninja-build, and pkg-config but also catch2 must be installed.

You had already written that. You should also include it in the description: https://libgpiod.readthedocs.io/en/master/building.html

Do you mean we need catch2 even if you have tests disabled? That should only be required if you use -Dtests=enabled and -Dbindings-cxx=enabled.

[omue999]

Okay, my mistake.
The description should be changed, though.
https://libgpiod.readthedocs.io/en/master/building.html

Thanks again!

[brgl]

I'm not following, what needs to be changed exactly?

[omue999]

Either at
The build system requires the following packages to be installed on the host system for the basic build:
insert catch2

or at

change
meson setup .. -Dtools=enabled

Or am I seeing it wrong?

[brgl]

Oh, what I mean is: catch2 shouldn't be required for a basic build. Maybe I should mention -auto-features=disabled.

[omue999]

yes !

[brgl]

https://lore.kernel.org/linux-gpio/20260622-build-catch2-issue-v1-0-be95e28f310b@oss.qualcomm.com/ I sent out a series that fixes the problems

[omue999]

Thanks!
Great work, as always.