[LLVMbugs] [Bug 11681] New: Problem with glibc headers and -D_FORTIFY_SOURCE=2

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=11681

             Bug #: 11681
           Summary: Problem with glibc headers and -D_FORTIFY_SOURCE=2
           Product: clang
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: -New Bugs
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: ismail at namtrac.org
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified


Created attachment 7821
  --> http://llvm.org/bugs/attachment.cgi?id=7821
Preprocessed source code

idoenmez at havana:~> cat t.c
#include <stdio.h>

extern int asprintf (char **, const char *, ...) 
__attribute__((__format__(__printf__,2,3)));

idoenmez at havana:~> clang -O2 -D_FORTIFY_SOURCE=2 -fstack-protector
-D_GNU_SOURCE -c -save-temps t.c
In file included from t.c:1:
t.c:3:37: error: expected parameter declarator
extern int __asprintf_chk (char **, 2 - 1, const char *, ...)
__attribute__((__format__(__printf__,2,3)));
                                    ^
t.c:3:37: error: expected ')'
t.c:3:27: note: to match this '('
extern int __asprintf_chk (char **, 2 - 1, const char *, ...)
__attribute__((__format__(__printf__,2,3)));
                          ^
t.c:3:12: error: conflicting types for '__asprintf_chk'
extern int __asprintf_chk (char **, 2 - 1, const char *, ...)
__attribute__((__format__(__printf__,2,3)));
           ^
/usr/include/bits/stdio2.h:133:12: note: previous declaration is here
extern int __asprintf_chk (char **__restrict __ptr, int __flag,
           ^
In file included from t.c:1:
t.c:3:78: error: 'format' attribute parameter 2 is out of bounds
extern int __asprintf_chk (char **, 2 - 1, const char *, ...)
__attribute__((__format__(__printf__,2,3)));
                                                                             ^ 
                   ~
4 errors generated.

Preprocessed source code is attached.

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