Preliminary notes, comments and concerns about converting/compiling various
files in the GTM distribution
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extract_signal_info.c ->
  FreeBSD has struct sigcontext in <machine/signal.h>
  -> included from sys/signal.h, included from signal.h
  
gtmio.h -> can FreeBSD lock over NFS?
gtmsiginfo.h -> is signal.h enough?

mdefsp.h ??? -> what is this file??
mu_rndwn_file.h -> ipcs command syntax?? 

sig_init.c -> what do we do about SIGEMT and SIGSYS ?

gtcm_neterr.c -> stropts.h??

what is stropts.h???
iotcp_open.c -> ?? time_for_read.at_(u)sec ??? what is this?
iotcp_readfl.c

v07_gdsroot.h -> unsigned int st_get

/usr/home/saintly/projects/gtm/gtm/sr_unix/gtmsecshr.c:29: libgen.h: No such file or directory
Why is libgen.h being included? 

/usr/home/saintly/projects/gtm/gtm/sr_unix/do_shmat.c:21: sys/sysmacros.h: No such file or directory