It seems not working on LFS64 (pure-64 linux.from scratch) vx64?
bash-3.2$ make gcc -m64 -c -nostdinc -Ilibvxc/include -g -O3 -MD -std=gnu99 -I. -fno- stack-protector -m80387 -mfp-ret-in-387 -o libvxc/abort.o libvxc/ abort.c gcc -m64 -c -nostdinc -Ilibvxc/include -g -O3 -MD -std=gnu99 -I. -fno- stack-protector -m80387 -mfp-ret-in-387 -o libvxc/assert.o libvxc/ assert.c gcc -m64 -c -nostdinc -Ilibvxc/include -g -O3 -MD -std=gnu99 -I. -fno- stack-protector -m80387 -mfp-ret-in-387 -o libvxc/atexit.o libvxc/ atexit.c gcc -m64 -c -nostdinc -Ilibvxc/include -g -O3 -MD -std=gnu99 -I. -fno- stack-protector -m80387 -mfp-ret-in-387 -o libvxc/difftime.o libvxc/ difftime.c gcc -m64 -c -nostdinc -Ilibvxc/include -g -O3 -MD -std=gnu99 -I. -fno- stack-protector -m80387 -mfp-ret-in-387 -o libvxc/errno.o libvxc/ errno.c ... gcc -m64 -c -nostdinc -Ilibvxc/include -g -O3 -MD -std=gnu99 -I. -fno- stack-protector -m80387 -mfp-ret-in-387 -o libvxc/bsdstdio/vasprintf.o libvxc/bsdstdio/vasprintf.c gcc -m64 -c -nostdinc -Ilibvxc/include -g -O3 -MD -std=gnu99 -I. -fno- stack-protector -m80387 -mfp-ret-in-387 -o libvxc/bsdstdio/vfprintf.o libvxc/bsdstdio/vfprintf.c libvxc/bsdstdio/vfprintf.c: In function : libvxc/bsdstdio/vfprintf.c:320: error: incompatible types when assigning to type from type libvxc/bsdstdio/vfprintf.c: In function : libvxc/bsdstdio/vfprintf.c:1008: error: incompatible types when assigning to type from type make: *** [libvxc/bsdstdio/vfprintf.o] Error 1