install_headers: do not exit if unifdef "fails", it's ok
install_headers: do not exit if unifdef "fails", it's ok


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