dont include sub makefiles if thread support has been disabled
dont include sub makefiles if thread support has been disabled

ysat0/uClibc,ddcc/klee-uclibc-0.9.33.2,atgreen/uClibc-moxie,ffainelli/uClibc,skristiansson/uClibc-or1k,ysat0/uClibc,ndmsystems/uClibc,gittup/uClibc,ChickenRunjyd/klee-uclibc,gittup/uClibc,majek/uclibc-vx32,atgreen/uClibc-moxie,kraj/uclibc-ng,m-labs/uclibc-lm32,ChickenRunjyd/klee-uclibc,ffainelli/uClibc,foss-for-synopsys-dwc-arc-processors/uClibc,waweber/uclibc-clang,groundwater/uClibc,m-labs/uclibc-lm32,hjl-tools/uClibc,waweber/uclibc-clang,foss-for-synopsys-dwc-arc-processors/uClibc,kraj/uClibc,foss-xtensa/uClibc,ysat0/uClibc,ddcc/klee-uclibc-0.9.33.2,majek/uclibc-vx32,hwoarang/uClibc,klee/klee-uclibc,atgreen/uClibc-moxie,OpenInkpot-archive/iplinux-uclibc,wbx-github/uclibc-ng,mephi42/uClibc,czankel/xtensa-uclibc,kraj/uClibc,majek/uclibc-vx32,hjl-tools/uClibc,brgl/uclibc-ng,hwoarang/uClibc,mephi42/uClibc,klee/klee-uclibc,groundwater/uClibc,majek/uclibc-vx32,OpenInkpot-archive/iplinux-uclibc,czankel/xtensa-uclibc,m-labs/uclibc-lm32,hwoarang/uClibc,mephi42/uClibc,gittup/uClibc,klee/klee-uclibc,ffainelli/uClibc,foss-xtensa/uClibc,wbx-github/uclibc-ng,hwoarang/uClibc,ddcc/klee-uclibc-0.9.33.2,brgl/uclibc-ng,wbx-github/uclibc-ng,foss-xtensa/uClibc,ffainelli/uClibc,mephi42/uClibc,czankel/xtensa-uclibc,skristiansson/uClibc-or1k,brgl/uclibc-ng,ddcc/klee-uclibc-0.9.33.2,waweber/uclibc-clang,OpenInkpot-archive/iplinux-uclibc,ndmsystems/uClibc,czankel/xtensa-uclibc,groundwater/uClibc,kraj/uclibc-ng,skristiansson/uClibc-or1k,foss-xtensa/uClibc,hjl-tools/uClibc,ysat0/uClibc,m-labs/uclibc-lm32,kraj/uClibc,kraj/uclibc-ng,ndmsystems/uClibc,hjl-tools/uClibc,kraj/uClibc,ndmsystems/uClibc,skristiansson/uClibc-or1k,groundwater/uClibc,groundwater/uClibc,ffainelli/uClibc,brgl/uclibc-ng,waweber/uclibc-clang,atgreen/uClibc-moxie,ChickenRunjyd/klee-uclibc,foss-for-synopsys-dwc-arc-processors/uClibc,wbx-github/uclibc-ng,hjl-tools/uClibc,klee/klee-uclibc,ChickenRunjyd/klee-uclibc,foss-for-synopsys-dwc-arc-processors/uClibc,OpenInkpot-archive/iplinux-uclibc,kraj/uclibc-ng,gittup/uClibc