[LLVMbugs] [Bug 18280] New: -Wformat does not warn for inlined functions

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Thu Dec 19 03:23:45 PST 2013


            Bug ID: 18280
           Summary: -Wformat does not warn for inlined functions
           Product: clang
           Version: 3.0
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++
          Assignee: unassignedclangbugs at nondot.org
          Reporter: nicholas at nicholaswilson.me.uk
                CC: dgregor at apple.com, llvmbugs at cs.uiuc.edu
    Classification: Unclassified

When I give an inlined definition to a function, the warning about "non-literal
format string" goes away.

For example:

#include <stdarg.h>
#include <stdio.h>
const char* dummy();
class Test1 {
  Test1(const char* fmt, ...)  __attribute__((format(printf,2,3)));
class Test2 {
  Test2(const char* fmt, ...)  __attribute__((format(printf,2,3)))
  { va_list a; va_start(a, fmt); vprintf(fmt, a); va_end(a); }

void tester() {
  Test1 t1(dummy());
  Test2 t2(dummy());

This compiles with no warning for t2 on clang ("clang++ -c test.cpp"), but
produces warnings for both cases using GCC ("g++ -c test.cpp").

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