Can't compile, endian.h not part of SunOS / Solaris

I can't compile tor-0.2.5.3-alpha on SunOS / Solaris 5.10 anymore because Solaris does not have a header file "endian.h", which is now required in "src/ext/csiphash.c"

This issue was not with tor-0.2.5.2-alpha. Can this be fixed?

gmake gmake all-am gmake[1]: Entering directory `/usr/local/lib/tor-0.2.5.3-alpha'

CC src/common/address.oCC src/common/backtrace.oCC src/common/compat.oCC src/common/container.oCC src/common/di_ops.oCC src/common/log.oCC src/common/memarea.oCC src/common/mempool.oCC src/common/procmon.o

src/common/procmon.c: In function `tor_process_monitor_poll_cb': src/common/procmon.c:327: warning: int format, pid_t arg (arg 4)

CC src/common/util.o

src/common/util.c: In function `tor_get_exit_code': src/common/util.c:4127: warning: int format, pid_t arg (arg 5) src/common/util.c:4133: warning: int format, pid_t arg (arg 5)

CC src/common/util_codedigest.oCC src/common/sandbox.oCC src/ext/csiphash.o

src/ext/csiphash.c:55:24: endian.h: No such file or directory src/ext/csiphash.c: In function siphash24': src/ext/csiphash.c:106: warning: implicit declaration of function le64toh' gmake[1]: *** [src/ext/csiphash.o] Error 1 gmake[1]: Leaving directory `/usr/local/lib/tor-0.2.5.3-alpha' gmake: *** [all] Error 2

Trac:
Username: Rainer