error trying to build very simple dll

[Robert Cordingley]

Trying to build a very simple little dll, I get the following error:

$ dlltool --def gettz.def --output-exp gettz.exp --output-lib gettz.a 
--dllname gettz.dll
$ gcc -c gettz.c
$ ld -o gettz.dll gettz.exp gettz.o
ld: warning: cannot find entry symbol _mainCRTStartup; defaulting to 00401000
gettz.o(.text+0xc):gettz.c: undefined reference to `time'
gettz.o(.text+0x20):gettz.c: undefined reference to `localtime'
gettz.o(.text+0x28):gettz.c: undefined reference to `_imp___tzname'

I'm not at all experienced with Cygwin development, and only a bit more 
experienced on actual unix.  Please forgive me if this is painfully obvious 
to the more knowledgeable folks on here.

Robert


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