GTK_MODULES=: is not an identifier

[Gerard Henry]

hello,
at the end of the make command, i got:
creating scilab-bin
./bin/scilab -ns -nwni -f 
modules/functions/scripts/buildmacros/buildmacros.sce
./bin/scilab: GTK_MODULES=: is not an identifier
make[1]: [macros] Error 1 (ignored)
make[1]: Leaving directory `/local/apps/src/scilab-5.0.3'

what's the meaning of this error?

thanks,

-- 
Gerard HENRY
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