[LLVMbugs] [Bug 24243] New: No -Wshadow Warning on Extern Functions

[bugzilla-daemon at llvm.org]

https://llvm.org/bugs/show_bug.cgi?id=24243

            Bug ID: 24243
           Summary: No -Wshadow Warning on Extern Functions
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: normal
          Priority: P
         Component: Frontend
          Assignee: unassignedclangbugs at nondot.org
          Reporter: chengniansun at gmail.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

$: cat t.c
extern void index2(void);
void foo3(void) {
  void (*index2)(void);
}
$: clang-trunk -c t.c -Weverything -Wno-missing-prototypes -Wno-unused-variable
$: gcc-trunk -c -Wshadow t.c
t.c: In function ‘foo3’:
t.c:3:10: warning: declaration of ‘index2’ shadows a global declaration
[-Wshadow]
   void (*index2)(void);
          ^
t.c:1:13: note: shadowed declaration is here
 extern void index2(void);
             ^
$:

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