"bc: command not found" when setting PX4_SIM_SPEED_FACTOR environment var.

[chrismiller7]

Error: ERROR [param] not enough arguments. Try 'param set PARAM_NAME 3 [fail]' etc/init.d-posix/rcS: line 193: bc: command not found

Tried with both v0.8 and v0.9 installation for Windows.

Steps to reproduce: Run run-console.bat cd Firmware export PX4_SIM_SPEED_FACTOR=2 make px4_sitl jmavsim

Output: [0/1] cd /cygdrive/c/PX4/home/Firmware/build/px4_sitl_defa...mware /cygdrive/c/PX4/home/Firmware/build/px4_sitl_default SITL ARGS sitl_bin: /cygdrive/c/PX4/home/Firmware/build/px4_sitl_default/bin/px4.exe debugger: none program: jmavsim model: none world: none src_path: /cygdrive/c/PX4/home/Firmware build_path: /cygdrive/c/PX4/home/Firmware/build/px4_sitl_default empty model, setting iris as default SITL COMMAND: "/cygdrive/c/PX4/home/Firmware/build/px4_sitl_default/bin/px4.exe" "/cygdrive/c/PX4/home/Firmware"/ROMFS/px4fmu_common -s etc/init.d-posix/rcS -t "/cygdrive/c/PX4/home/Firmware"/test_data Buildfile: C:\PX4\home\Firmware\Tools\jMAVSim\build.xml

make_dirs:

compile:

create_run_jar: INFO [px4] Creating symlink /cygdrive/c/PX4/home/Firmware/ROMFS/px4fmu_common -> /cygdrive/c/PX4/home/Firmware/build/px4_sitl_default/tmp/rootfs/etc

---

| ___ \ \ \ / / / | | |/ / \ V / / /| | | __/ / \ / /| | | | / /^\ \ ___ | _| / / |_/

px4 starting.

INFO [px4] Calling startup script: /bin/sh etc/init.d-posix/rcS 0

copy_res:

BUILD SUCCESSFUL Total time: 0 seconds Options parsed, starting Sim. Starting GUI... INFO [param] selected parameter default file eeprom/parameters_10016 [param] Loaded: eeprom/parameters_10016 etc/init.d-posix/rcS: line 185: bc: command not found COM_DL_LOSS_T set to ERROR [param] not enough arguments. Try 'param set PARAM_NAME 3 [fail]' etc/init.d-posix/rcS: line 189: bc: command not found COM_RC_LOSS_T set to ERROR [param] not enough arguments. Try 'param set PARAM_NAME 3 [fail]' etc/init.d-posix/rcS: line 193: bc: command not found COM_OF_LOSS_T set to ERROR [param] not enough arguments. Try 'param set PARAM_NAME 3 [fail]' INFO [dataman] Unknown restart, data manager file './dataman' size is 11798680 bytes INFO [simulator] Waiting for simulator to accept connection on TCP port 4560 INFO [simulator] Simulator connected on TCP port 4560. Init MAVLink INFO [commander] LED: open /dev/led0 failed (22) INFO [init] Mixer: etc/mixers/quad_w.main.mix on /dev/pwm_output0 INFO [mavlink] mode: Normal, data rate: 4000000 B/s on udp port 18570 remote port 14550 INFO [mavlink] mode: Onboard, data rate: 4000000 B/s on udp port 14580 remote port 14540 INFO [mavlink] mode: Onboard, data rate: 4000 B/s on udp port 14280 remote port 14030 INFO [logger] logger started (mode=all) INFO [logger] Start file log (type: full) INFO [logger] [logger] ./log/2022-01-21/16_09_43.ulg INFO [logger] Opened full log file: ./log/2022-01-21/16_09_43.ulg INFO [mavlink] MAVLink only on localhost (set param MAV_BROADCAST = 1 to enable network) INFO [px4] Startup script returned successfully

Comments It looks like the script uses the bc calculator package. This doesn't seem to be installed by default.

[hamishwillee]

Was this fixed by your #30 updates?

The dependencies that are required can be found in the linux scripts (which are run in CI);

• https://github.com/PX4/PX4-Autopilot/blob/master/Tools/setup/ubuntu.sh
• https://github.com/PX4/PX4-Autopilot/blob/master/Tools/setup/requirements.txt

Windows is a bit undersupported since most dev team are on linux or macOS. We want to move to WSL2 based solution soon so it can use the same core scripts for setup.