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Bug 72175 - #include <fcntl.h> // doesn't get me F_SETSIG anymore
#include <fcntl.h> // doesn't get me F_SETSIG anymore
Product: Red Hat Linux
Classification: Retired
Component: gcc (Show other bugs)
i386 Linux
medium Severity medium
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Assigned To: Jakub Jelinek
Brian Brock
: FutureFeature
Depends On:
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Reported: 2002-08-21 14:03 EDT by Olen
Modified: 2007-04-18 12:45 EDT (History)
0 users

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Doc Type: Enhancement
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Last Closed: 2002-08-21 14:04:02 EDT
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Description Olen 2002-08-21 14:03:56 EDT
From Bugzilla Helper:
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:

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.
Comment 1 Jakub Jelinek 2002-08-21 14:07:55 EDT
F_SETSIG is a GNU extension, so you need to -D_GNU_SOURCE when compiling
file using it to get its definition. See info libc on feature set macros.

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