../lib/src/gretl_www.c:24:19: fatal error: build.h: No such file or directory

 #include "build.h"

                   ^

compilation terminated.

make[4]: *** [gretl_www.lo] Error 1

make[4]: Leaving directory `/home/acer/gretl-git/lib'

make[3]: *** [../../lib/libgretl-1.0.la] Error 2

make[3]: Leaving directory `/home/acer/gretl-git/doc/commands'

make[2]: *** [textables] Error 2

make[2]: Leaving directory `/home/acer/gretl-git/doc/tex'

make[1]: *** [tex] Error 2

make[1]: Leaving directory `/home/acer/gretl-git/doc'

make: *** [pdfdocs] Error 2