[LLVMbugs] [Bug 2843] New: llvm-gcc has -Wformat-nonliteral on by default, can' t switch it off

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.org/bugs/show_bug.cgi?id=2843

           Summary: llvm-gcc has -Wformat-nonliteral on by default, can't
                    switch it off
           Product: tools
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: llvm-gcc
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: nlewycky at google.com
                CC: rafael.espindola at gmail.com, llvmbugs at cs.uiuc.edu


$ cat foo.cpp
#include <stdio.h>

extern const char *foo();

int main(void) {
  const char *the_string = foo();
  printf(the_string);
}
$ llvm-g++ -c foo.cpp -Wno-format-nonliteral
foo.cpp: In function ‘int main()’:
foo.cpp:7: warning: format not a string literal and no format arguments
$ g++ -c foo.cpp
$

GCC will pick it up with -Wformat -Wformat-nonliteral, or -Wall
-Wformat-nonliteral, but llvm-gcc picks it up always.

In my case, this is worsened by being combined with -Werror ...


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