Fixed build on Linux with x32 ABI. On Linux x32 inclusion of sys/sysctl.h produces an error. As sysctl() is only used by rtsig event method code, which is legacy and not compiled in by default on modern linuxes, the sys/sysctl.h file now only included if rtsig support is enabled. Based on patch by Serguei I. Ivantsov.

# Copyright (C) Igor Sysoev
# Copyright (C) Nginx, Inc.


CFLAGS = -zq -bt=nt -bm -ot -op -oi -oe -s $(CPU_OPT)

md5.lib:
	cd $(MD5)
	wcl386 -c $(CFLAGS) -dL_ENDIAN md5_dgst.c
	wlib -n md5.lib md5_dgst.obj