libzahl - big integer library

http://git.suckless.org/libzahl/tree/
The rationale for its creation can be found on the README file.
What do you think?

tried running ``make bench'' on hebimath.

CC bench/bench.c
AR bench/libbench.a
CC bench/p/padd.c
CC bench/p/paddu.c
CC bench/p/pclz.c
CC bench/p/pctz.c
CC bench/p/pcmp.c
CC bench/p/pcopy.c
CC bench/p/pdivrem.c
/usr/lib/gcc/x86_64-alpine-linux-musl/6.3.0/../../../../x86_64-alpine-linux-musl/bin/ld: libhebimath.a(recipu2x1.o): relocation R_X86_64_32S against hidden symbol `hebi_recipu64_v0lut__' can not be used when making a shared object
/usr/lib/gcc/x86_64-alpine-linux-musl/6.3.0/../../../../x86_64-alpine-linux-musl/bin/ld: libhebimath.a(pmove.o): relocation R_X86_64_32S against `.rodata' can not be used when making a shared object; recompile with -fPIC
/usr/lib/gcc/x86_64-alpine-linux-musl/6.3.0/../../../../x86_64-alpine-linux-musl/bin/ld: final link failed: Nonrepresentable section on output
collect2: error: ld returned 1 exit status
make: *** [Makefile:354: bench/p/pdivrem] Error 1