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User-Agent: Mozilla/4.79 [en] (Windows NT 5.0; U)

Description of problem:
I wrote a sample program to raise a single when data was ready on a file descriptor.   The signal must be set to get information to the signal 
handler.   The F_SETSIG symbol/macro/define wasn't in the include file.   I did a recursive grep in the include directory, and found its value should 
be 10, so I used that, and the program works.   The man page for fcntl only has me including fcntl.h but this didn't get F_SETSIG defined for me.

Version-Release number of selected component (if applicable):


How reproducible:
Always

Steps to Reproduce:
1.Write a program that includes fcntl.h, and used the F_SETSIG symbol.
2.compile program
3. program won't compile due to an undefined symbol
	

Actual Results:  The program won't compile.

Expected Results:  I think the fcntl.h should include enough other files, so that this gets defined.

Additional info:

It is defined in  a subdiretories file.   The other fcntl  command arguements are defined, or atleast the other I have used.
I am pretty sure I didn't misspell the symbol name though.  I found it with a recursive grep, and just use the numerical value,
but that isn't very portable.