/usr/etc/ is not a standards conforming directory for configuration files. Please use /etc/ or /usr/lib/rtl_433/.

[dreirund]

Building your software with -DCMAKE_INSTALL_PREFIX=/usr, it installs configuration files into /usr/etc/rtl_433/. Even if I pass -DCMAKE_INSTALL_SYSCONFDIR=/etc (with leading slash), they end up in /usr/etc/rtl_433/ and not /etc/rtl_433/:

With build carried out as:

git clone https://github.com/merbanan/rtl_433.git
mkdir -p build
cmake -S rtl_433 -B build \
  -DCMAKE_BUILD_TYPE=Release \
  -DCMAKE_INSTALL_PREFIX=/usr \
  -DCMAKE_INSTALL_BINDIR=/usr/bin \
  -DCMAKE_INSTALL_SBINDIR=/usr/bin \
  -DCMAKE_INSTALL_SYSCONFDIR=/etc \
  -DBUILD_DOCUMENTATION=OFF \
  -DBUILD_TESTING=ON \
  -DBUILD_TESTING_ANALYZER=OFF \
  -DENABLE_IPV6=ON \
  -DENABLE_OPENSSL=ON \
  -DENABLE_RTLSDR=ON \
  -DENABLE_SOAPYSDR=ON \
  -DENABLE_THREADS=ON

make -C build
make DESTDIR=/tmp/rtl_433 install

installs configuration files into /tmp/rtl_433/usr/etc/rtl_433 and not /tmp/rtl_433/etc/rtl_433.

This is not standards conforming. They should go into /etc/rtl_433/ (without /usr), or if they are not meant to be modified by the user use /usr/lib/rtl_433.

Regards and thanks for the software and for maintaining!