I have compiled the sources on Darwin 7.4.0 with gcc 3.3. After the compilation of source codes, I 
try to execute "gmake install". I got the following message:
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Nothing to be done for "install".
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The install target could not be executed. Then I add the following line to the Makefile:
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.PHONY: install
------

The install target can be executed. But when it is tring to copy "dio" to the proper directory, it 
cannot find the file. Then I found that the "utils" target isn't built. 
I try to build the target: darwin/bin/dio, I got the following error:
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cc -g -O2 -Wall -Iinclude -Idrivers -Ldarwin/lib -DINCLUDE_FTPLIB   -DOS_LINUX -DOS_DARWIN 
-DHAVE_STRLCPY -fPIC -Wno-unused-function -o darwin/bin/dio utils/dio.c
utils/dio.c:39:20: sys/io.h: No such file or directory
utils/dio.c: In function `main':
utils/dio.c:46: warning: implicit declaration of function `iopl'
gmake: *** [darwin/bin/dio] Error 1
--------
So, the include file "sys/io.h" may be changed under Darwin. I don't know how. I will try later. I 
hope somebody can notice this. 
Best regards.