application won't build (debug mode) on Debian Wheezy 64 bits

What steps will reproduce the problem?
1.
./build.sh -t -b freemedforms

What is the expected output?

Successful build.

What do you see instead?

xxx@debian:/media/data/dev/freemedforms$ ./build.sh -t -b freemedforms
* Guessing spec file
    Linux OS detected; setting qmake spec to linux-g++
* Creating build log: ./build_1403569710.log
*** Building application in DEBUG mode: freemedforms (debug) ***
10
# Cleaning build path
20
# Creation translations
* Creating translations
        Translations created
# Entering freemedforms
30
# Preparing the build:
running qmake
* qmake freemedforms.pro -r CONFIG+=debug CONFIG-=release 
CONFIG+=debug_without_install -spec linux-g++
Project MESSAGE: *** Catching the current specs
Project MESSAGE: linux-g++
Project MESSAGE: Building libquazip
Project MESSAGE: Building Agenda plugin
Project MESSAGE: Building Alert plugin
Project MESSAGE: Building PadTools plugin
Project MESSAGE: Building PMH plugin
Project MESSAGE: Building Feedback plugin
Project MESSAGE: Building debug mode without installation
        qmake correctly done
40
# Building the application (make step)
# make -j4
../../build/Qt4_linux-gpp/FreeMedForms/Core_debug/.obj/unix/coreplugin.o: In 
function `Utils::Log::debugPluginsCreation()':
/media/data/dev/freemedforms/plugins/fmfcoreplugin/../../libs/utils/log.h:105: 
undefined reference to `Utils::Log::m_debugPlugins'
collect2: error: ld returned 1 exit status
make[2]: *** [../../bin/freemedforms_Qt4_linux-gpp/plugins/libCore_debug.so] 
Erreur 1
make[1]: *** [sub-------plugins-fmfcoreplugin-make_default] Erreur 2
make: *** [sub-plugins-make_default-ordered] Erreur 2
* ERROR: make step wrong ***
* Build UNCOMPLETE: freemedforms

Original issue reported on code.google.com by contact@medecinelibre.com on 24 Jun 2014 at 12:38

thabet-fix / freemedforms

application won't build (debug mode) on Debian Wheezy 64 bits #356