StackOverflow2013

Note that there are some explanatory texts on larger screens.

plurals

POwhere is c function attribute set (how to unset) with gcc
primarykey
Id
1343180
data
AcceptedAnswerId
0
AnswerCount
2
ClosedDate
CommentCount
4
CommunityOwnedDate
CreationDate
2009-08-27T19:06:20.703
FavoriteCount
0
LastActivityDate
2010-03-15T21:28:02.800
LastEditDate
2010-03-15T21:28:02.800
LastEditorUserId
155245
OwnerUserId
155245
ParentId
0
PostTypeId
1
Score
2
ViewCount
660
LastEditorDisplayName
text
Body
I am working with code from the GNU core utils, and find that the void usage() function is apparently set with the attribute "noreturn". Well, I am modifying the function, and I wish it to return (I removed the call to exit()). The compiler still complains that a "noreturn" function returns, and when using the Eclipse CDT debugger, stepping thorugh the code is anomolous - I skip over lines of code. I do not see the function be set in the .c file, and there is no .h file for this .c file. The file is df.c. I have renamed the file df_call.c. How can the compiler be finding this attribute? How can I unset it? Thanks. ======= Thanks to all contributors for their help! The short answer is "the usage() function found in GNUutils 7.4 is prototyped in system.h as 'void usage (int status) ATTRIBUTE_NORETURN'. Changing to 'void usage (int status); /ATTRIBUTE_NORETURN;/' resolved the issue for me, but leaves the problem of a modified system.h. The long answer is: The GNU c compiler supports assigning attributes to functions (see <a href="http://gcc.gnu.org/onlinedocs/gcc/Function-Attributes.html" rel="nofollow noreferrer">http://gcc.gnu.org/onlinedocs/gcc/Function-Attributes.html</a>) one of which is "noreturn". The syntax is "attribute ((noreturn))" (see <a href="http://gcc.gnu.org/onlinedocs/gcc/Attribute-Syntax.html#Attribute-Syntax" rel="nofollow noreferrer">http://gcc.gnu.org/onlinedocs/gcc/Attribute-Syntax.html#Attribute-Syntax</a>) but is often macro'd to ATTRIBUTE_NORETURN. If the attribute is set, and in this case one tries to return from the function, the executable compiles with a complaint, but compiles and runs. It will, however, behave unexpectedly (skipping over src lines in my case, maybe due to the optimization). The debugger in Eclipse CDT actually jumps past lines of code, leading the developer to doubt his senses.
Tags
<c><gcc>
Title
where is c function attribute set (how to unset) with gcc
singulars
PostAcceptedAnswerId
1. This table or related slice is empty.
PostParentId
1. This table or related slice is empty.
PostTypePostTypeId
1. PTQuestion
UserLastEditorUserId
1. UScvsdave
UserOwnerUserId
1. UScvsdave
plurals
PostLinksPostIdRelatedPostId
1. This table or related slice is empty.
PostLinksRelatedPostIdPostId
1. This table or related slice is empty.
PostsAcceptedAnswerId
1. This table or related slice is empty.
PostsParentIdCreationDate
1. PO
 singulars
 PostTypePostTypeId
 PTAnswer
2. PO
 singulars
 PostTypePostTypeId
 PTAnswer
VotesPostIdCreationDate
1. VO
 singulars
 PostPostId
 POwhere is c function attribute set (how to unset) with gcc
 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTUpMod
2. VO
 singulars
 PostPostId
 POwhere is c function attribute set (how to unset) with gcc
 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTUpMod
CommentsPostId

Querying!

Guidance

A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.