Running "g++ --version" gave "[Errno 2] No such file or directory: 'g++'"

[pguerin3]

Describe the bug

When trying to create an rpm package for Fedora, I run the following as described in HACKING.md

$ rpmbuild -ba rpm/touchegg.spec

Expected behaviour

The previous steps did complete without error:

$ mkdir -p ~/rpmbuild/{BUILD,RPMS,SOURCES,SPECS,SRPMS}
$ tar --exclude='.flatpak-builder' --exclude='.git' --exclude='build' --exclude='com.github.joseexposito.touche.yml' -czvf ~/rpmbuild/SOURCES/touche.tar.gz -C .. touche

Actual behaviour

I get the following error:

Running "g++ --version" gave "[Errno 2] No such file or directory: 'g++'"

Logs

This is the tail of the output to the terminal:

+ export FCFLAGS
+ LDFLAGS='-Wl,-z,relro -Wl,--as-needed  -Wl,-z,now -specs=/usr/lib/rpm/redhat/redhat-hardened-ld '
+ export LDFLAGS
+ LT_SYS_LIBRARY_PATH=/usr/lib64:
+ export LT_SYS_LIBRARY_PATH
+ CC=gcc
+ export CC
+ CXX=g++
+ export CXX
+ /usr/bin/meson --buildtype=plain --prefix=/usr --libdir=/usr/lib64 --libexecdir=/usr/libexec --bindir=/usr/bin --sbindir=/usr/sbin --includedir=/usr/include --datadir=/usr/share --mandir=/usr/share/man --infodir=/usr/share/info --localedir=/usr/share/locale --sysconfdir=/etc --localstatedir=/var --sharedstatedir=/var/lib --wrap-mode=nodownload --auto-features=enabled . x86_64-redhat-linux-gnu -Dflatpak=false
The Meson build system
Version: 0.59.1
Source dir: /home/me/rpmbuild/BUILD/touche
Build dir: /home/me/rpmbuild/BUILD/touche/x86_64-redhat-linux-gnu
Build type: native build
Project name: com.github.joseexposito.touche
Project version: 2.0.1
Host machine cpu family: x86_64
Host machine cpu: x86_64
Program gjs found: YES (/bin/gjs)
Program npm found: YES (/bin/npm)
Program node found: YES (/bin/node)
Program g-ir-scanner found: YES (/bin/g-ir-scanner)
Program desktop-file-validate found: YES (/bin/desktop-file-validate)
Program appstream-util found: YES (/bin/appstream-util)
Program glib-compile-schemas found: YES (/bin/glib-compile-schemas)
Program xgettext found: YES (/bin/xgettext)

Executing subproject libtouche 

libtouche| Project name: libtouche
libtouche| Project version: 2.0.0

subprojects/libtouche/meson.build:1:0: ERROR: Unknown compiler(s): [['g++']]
The following exception(s) were encountered:
Running "g++ --version" gave "[Errno 2] No such file or directory: 'g++'"

A full log can be found at /home/me/rpmbuild/BUILD/touche/x86_64-redhat-linux-gnu/meson-logs/meson-log.txt
error: Bad exit status from /var/tmp/rpm-tmp.heb6EC (%build)

RPM build errors:
    Bad exit status from /var/tmp/rpm-tmp.heb6EC (%build)

Your environment

• Operating System: Fedora
• Desktop Environment: LXDE

[JoseExposito]

The latest version (v2.x.x) uses GTK 4 and libadwaita. While GTK 4 is available on Fedora, I'm not sure about libadwaita, I'll need to check.

I'd suggest installing from Flathub, as the RPM is not up to date at the moment.

---

About your problem, you'd need to install a C++ compiler... But you'll get stuck somewhere else:

sudo dnf install gcc-c++