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I try to install sK1 in CentOS5 (x86-64)

python setup.py install

but it retuns

running build_ext
building 'sk1.app.modules._sketchmodule' extension
gcc -pthread -fno-strict-aliasing -DNDEBUG -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -D_GNU_SOURCE -fPIC -fPIC -DMAJOR_VERSION=0 -DMINOR_VERSION=9 -I/usr/include/cairo -I/usr/include/python2.4 -c src/extentions/skmod/skaux.c -o build/temp.linux-x86_64-2.4/src/extentions/skmod/skaux.o
src/extentions/skmod/skaux.c:359: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'SKCache_length'
src/extentions/skmod/skaux.c:391: error: 'lenfunc' undeclared here (not in a function)
src/extentions/skmod/skaux.c:391: error: expected '}' before 'SKCache_length'
error: command 'gcc' failed with exit status 1