Qt Cross Raspi - How to add support for libinput and fontconfig?

rrd0

I'm trying to cross compile Qt for Raspberry Pi.

I'm in the step of running ./configure to prepare the files for build:

./configure -release -opengl es2 -device linux-rasp-pi3-g++ \
-device-option CROSS_COMPILE=~/qt-cross-raspi/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian-x64/bin/arm-linux-gnueabihf- \
-sysroot ~/qt-cross-raspi/sysroot -opensource -confirm-license -make libs \
-prefix /usr/local/qt5 -extprefix ~/qt-cross-raspi/qt5raspi \
-hostprefix ~/qt-cross-raspi/qt5 -v -no-use-gold-linker

But, as you can see in the excerpt of configure.summary below, libinput and fontconfig are disabled.

Build options:
Qt Gui:
  ...
  FreeType ............................... yes
    Using system FreeType ................ no
  ...
  Fontconfig ............................. no
Features used by QPA backends:
  ...
  libinput ............................... no
  ...

If I add the options -fontconfig -libinput to configure, then it adds the following to the summary:

ERROR: Feature 'fontconfig' was enabled, but the pre-condition '!config.win32 && features.system-freetype && libs.fontconfig' failed.

ERROR: Feature 'libinput' was enabled, but the pre-condition 'features.libudev && libs.libinput' failed.

Rasbian already have the following freetype, fontconfig and libinput packages installed:

libfreetype6-dev is already the newest version (2.9.1-3).
fontconfig is already the newest version (2.13.1-2).
libinput-bin is already the newest version (1.12.6-2).
libinput-dev is already the newest version (1.12.6-2).
libinput10 is already the newest version (1.12.6-2).

So, I don't know what I'm doing wrong. Are there dependencies I'm missing? I misconfigured something?

rrd0

The option -force-pkg-config solved my problem.

First I've needed to unset PKG_CONFIG_PATH, as described in this page.

Then just ran:

./configure -release -opengl es2 -device linux-rasp-pi3-g++ \
-device-option CROSS_COMPILE=~/qt-cross-raspi/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian-x64/bin/arm-linux-gnueabihf- \
-sysroot ~/qt-cross-raspi/sysroot -opensource -confirm-license -make libs \
-prefix /usr/local/qt5 -extprefix ~/qt-cross-raspi/qt5raspi \
-hostprefix ~/qt-cross-raspi/qt5 -v -no-use-gold-linker -force-pkg-config

And configure.summary now shows fontconfig and libinput enabled:

Build options:
Qt Gui:
  ...
  FreeType ............................... yes
    Using system FreeType ................ yes
  ...
  Fontconfig ............................. yes
Features used by QPA backends:
  ...
  libinput ............................... yes
  ...