Qt installation problem for embedded Linux

[develop-it]

Hello,
I am trying to install Qt for my embedded linux board (AcquaA5), but i have the following problem :
Some warning and some errors appears when i am doing the ./configure command.

A warning :
You have not explicitly asked to use pkg-config and are cross-compiling.
pkg-config will not be used to automatically query cflag/lib parameters for
dependencies

floatmath auto-detection... ()
arm-linux-gnueabihf-g++ -c -pipe -O2 -Wall -W -I../../../mkspecs/linux-arm-gnueabihf-g++ -I. -I/usr/local/arm/include -I/usr/local/arm/ssl/include -o floatmath.o floatmath.cpp
floatmath.cpp:44:14: warning: unused parameter ‘argc’ [-Wunused-parameter]
int main(int argc, char **argv)

An error :
arm-linux-gnueabihf-g++ -c -pipe -mmmx -O2 -Wall -W -I../../../mkspecs/linux-arm-gnueabihf-g++ -I. -I/usr/local/arm/include -I/usr/local/arm/ssl/include -o mmx.o mmx.cpp
arm-linux-gnueabihf-g++: error: unrecognized command line option ‘-mmmx’
Makefile:187 : la recette pour la cible « mmx.o » a échouée
make: *** [mmx.o] Erreur 1
mmx disabled.

I tried to launch the make command but after few minutes, it says me that an error occured.

Can somebody solve my problem ?
Thanks.Thank you for your fast answer, it helps me. But i always have the warnings and the fatal errors..

[jsulm]

@develop-it See my answer here: http://forum.qt.io/topic/68325/the-library-could-not-be-configured-for-supporting-multi-threaded-applications
If you have another error while executing make then you should post it here, else it is not possible to help you.