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I am trying to rebuild fcitx on Xenial (16.04.3) so that I can debug the failure to respond to R-ALT when using an M17N input method. My attempt to rebuild fcitx fails with the error message:
CMake Error at CMakeLists.txt:8 (find_package): Could not find a package configuration file provided by "ECM" (requested version 0.0.11) with any of the following names:
ECMConfig.cmake ecm-config.cmake
ECM stands for Extra CMake Modules. It adds additional modules to your cmake installation. See the manual here.
On Ubuntu (or any other Debian based system), you can install it with
sudo apt install extra-cmake-modules
Once that's done, fcitx build should be able to continue if all other dependencies are also satisfied.
An immediate practical answer to my question is given in the 'Error List' section of http://www.d3rm.org/Programming_Language/z.Programmer%27s_Toolkit/FCITX_-_Free_Chinese_Input_Toy_for_X/1.Installation.html . One doesn't need to be able to read Chinese to understand the solutions.
However, the correct approach would have been to use apt-get build-dep... That command asks before installing.
I still hit a problem with rebuilding even after using apt-get build-dep, but I managed to rebuild enough to find and implement a solution to my problem. An intermediate problem was solved by using apt-get install when apt-get build-dep declined to install a needed package.
