=> Bootstrap dependency digest>=20010302: found digest-20160304
===> Building for bwa-0.7.9anb2
cc -c -O2 -march=i586 -I/usr/include -DHAVE_PTHREAD -DUSE_MALLOC_WRAPPERS  utils.c -o utils.o
cc -c -O2 -march=i586 -I/usr/include -DHAVE_PTHREAD -DUSE_MALLOC_WRAPPERS  kthread.c -o kthread.o
kthread.c:1:10: fatal error: 'pthread.h' file not found
#include <pthread.h>
         ^
1 error generated.
Makefile:20: recipe for target 'kthread.o' failed
gmake: *** [kthread.o] Error 1
*** Error code 2

Stop.
bmake[1]: stopped in /usr/pkgsrc/biology/bwa
*** Error code 1

Stop.
bmake: stopped in /usr/pkgsrc/biology/bwa