Qt Conan package troubleshooting

Here you can find causes for commonly encountered issues with Conan

• *** No rule to make target 'hdb', needed by 'all-local'.
  • When compiling Qt from sources (qtbase more specifically) and you have enabled ICU (e.g. qtbase:icu=True in the --profile used) the build recipe of the ICU attempts to read 'TARGET' environment variable and if that happens to contain a value the ICU recipe does not accept it will throw an error:

    errors: logfile attached
    make[1]: *** No rule to make target 'hdb', needed by 'all-local'. Stop.
    make: *** [Makefile:143: all-recursive] Error
    ERROR: icu/56.1@qt/everywhere: Error in build() method, line 156
    

  • Fix:
    • $ unset TARGET
      
• Connection issues with the default conan-center remote (not hosted by Qt)
  • Unable to connect to conancenter=https://center.conan.io
  • ERROR: HTTPSConnectionPool(host='center.conan.io', port=443): Max retries exceeded with url: /v1/ping (Caused by ResponseError('too many 502 error responses')). [Remote: conancenter]
  • Fix:
    • If you do not need any packages from the conan-center you can disable it temporarily by: $ conan remote disable conancenter