[LLVMbugs] [Bug 2930] New: clang does not allow VLA in unions/structs as gcc does ( violates C99)

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.org/bugs/show_bug.cgi?id=2930

           Summary: clang does not allow VLA in unions/structs as gcc does
                    (violates C99)
           Product: clang
           Version: unspecified
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Keywords: missing-feature
          Severity: normal
          Priority: P2
         Component: parser
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: rdivacky at freebsd.org
                CC: llvmbugs at cs.uiuc.edu


gcc accepts this code:

int
__xuname(int namesize, void *namebuf)
{
        struct xutsname {
                char    sysname[namesize];      /* Name of this OS. */
        } *name;
}

which clang refuses with:

const.c:5:25: error: arrays with static storage duration must have constant
integer length
                char    sysname[namesize];      /* Name of this OS. */
                                        ^~~~~~~

this violates C99 but it is needed to get full gcc compatibility


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