[cmake-developers] [CMake 0015203]: CheckStructHasMember breaks on -Wunused-value

[Mantis Bug Tracker]

The following issue has been SUBMITTED. 
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http://www.cmake.org/Bug/view.php?id=15203 
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Reported By:                Lekensteyn
Assigned To:                
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Project:                    CMake
Issue ID:                   15203
Category:                   Modules
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     new
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Date Submitted:             2014-10-10 17:46 EDT
Last Modified:              2014-10-10 17:46 EDT
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Summary:                    CheckStructHasMember breaks on -Wunused-value
Description: 
When CMAKE_C_FLAGS containg -Wall -Werror, CheckStructHasMember will always fail
due to the generated code appearing as:

int main()
{
    struct FOO* s;
    s->MEMBER;
    return 0;
}

See the attached patch for a fix. Don't know whether some -std flag will also
bail out on int main() rather than int main(void), but that's a different issue.
This one is about breakage due to very strict warnings on a modern compiler (GCC
4.9.1).
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Issue History 
Date Modified    Username       Field                    Change               
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2014-10-10 17:46 Lekensteyn     New Issue                                    
2014-10-10 17:46 Lekensteyn     File Added:
0001-CheckStructHasMember-avoid-breakage-on-Wall.patch                    
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