gcc -Os -fomit-frame-pointer -pipe -x none minitests.o libvacall.a -Wl,--as-needed -o minitests
  /usr/lib/gcc/armv6-alpine-linux-musleabihf/6.4.0/../../../../armv6-alpine-linux-musleabihf/bin/ld: libvacall.a(vacall.o): relocation R_ARM_MOVW_ABS_NC against `vacall_function' can not be used when making a shared object; recompile with -fPIC
  libvacall.a: error adding symbols: Bad value
  collect2: error: ld returned 1 exit status
  make[1]: *** [Makefile:271: minitests] Error 1