[Bug gcov-profile/51113] [4.7 regression] rev. 181105 causes Firefox profiledbuild failure

[markus at trippelsdorf dot de]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51113

--- Comment #7 from Markus Trippelsdorf <markus at trippelsdorf dot de> 
2011-11-15 10:03:05 UTC ---
Here is a small testcase:

 % cat test.ii
extern "C"
{
    typedef long unsigned int size_t;
}
extern "C"
{
    static inline void *js_malloc (size_t bytes)
    {
    }
}
namespace std
{
typedef long unsigned int size_t;
}
extern "C++"
{
    inline void *operator  new (std::size_t, void *__p) throw ()
    {
    }
    class OffTheBooks
    {
    public:
        template < class T >
        __attribute__ ((always_inline)) inline static T *new_ () {
        }
        template < class T, class P1, class P2, class P3, class P4 >
         __attribute__ ((always_inline)) inline static T *new_ 
                   (P1 p1, P2 p2, P3 p3, P4 p4)
        {
            void *memory =::js_malloc (sizeof (T));

            return memory ? new (memory) T (p1, p2, p3, p4) : __null;
        }
    };
}

enum OptionKind {
    OptionKindBool, OptionKindString, OptionKindInt,
    OptionKindMultiString, OptionKindInvalid
};
struct Option {
    const char *longflag;
    const char *help;
    OptionKind kind;
    char shortflag;
    bool terminatesOptions;
    Option (OptionKind kind, char shortflag, const char *longflag,
            const char *help):longflag (longflag),
        help (help),
        kind (kind),
        shortflag (shortflag),
        terminatesOptions (false) {
    }
};
struct ValuedOption:public Option {
    const char *metavar;
    ValuedOption (OptionKind kind, char shortflag, const char *longflag,
                  const char *help, const char *metavar):Option (kind,
                              shortflag,
                              longflag,
                              help),
        metavar (metavar) {
    }
    virtual ~ ValuedOption () = 0;
};
struct StringOption:public ValuedOption {
    const char *value;
    StringOption (char shortflag, const char *longflag,
                  const char *help, const char *metavar)
      :ValuedOption (OptionKindString, shortflag, longflag,
          help, metavar), value (__null) { }
    virtual ~StringOption() {}
};
class OptionParser
{
    bool addStringOption (char shortflag, const char *longflag,
                          const char *help, const char *metavar);
};

bool
OptionParser::addStringOption (char shortflag, const char *longflag,
                               const char *metavar, const char *help)
{
    StringOption *so =
        OffTheBooks::new_ <StringOption> (shortflag, longflag, help, metavar);
}

With commit 5014df5d02d9d9 reverted:
 % c++ -shared -w -o /dev/null -fPIC -fno-rtti -pthread -pipe
-fprofile-generate -O0 test.ii
 %

With your patch:
 % c++ -shared -w -o /dev/null -fPIC -fno-rtti -pthread -pipe
-fprofile-generate -O0 test.ii
/usr/lib/gcc/x86_64-pc-linux-gnu/4.7.0/../../../../x86_64-pc-linux-gnu/bin/ld:
error: /tmp/cciGbsuB.o: requires dynamic R_X86_64_PC32 reloc against
'__gcov0__ZnwmPv' which may overflow at runtime; recompile with -fPIC
/usr/lib/gcc/x86_64-pc-linux-gnu/4.7.0/../../../../x86_64-pc-linux-gnu/bin/ld:
error: /tmp/cciGbsuB.o: requires dynamic R_X86_64_PC32 reloc against
'__gcov0__ZN6OptionC2E10OptionKindcPKcS2_' which may overflow at runtime;
recompile with -fPIC
/usr/lib/gcc/x86_64-pc-linux-gnu/4.7.0/../../../../x86_64-pc-linux-gnu/bin/ld:
error: /tmp/cciGbsuB.o: requires dynamic R_X86_64_PC32 reloc against
'__gcov0__ZN12ValuedOptionC2E10OptionKindcPKcS2_S2_' which may overflow at
runtime; recompile with -fPIC
/usr/lib/gcc/x86_64-pc-linux-gnu/4.7.0/../../../../x86_64-pc-linux-gnu/bin/ld:
error: /tmp/cciGbsuB.o: requires dynamic R_X86_64_PC32 reloc against
'__gcov0__ZN12StringOptionC2EcPKcS1_S1_' which may overflow at runtime;
recompile with -fPIC
/usr/lib/gcc/x86_64-pc-linux-gnu/4.7.0/../../../../x86_64-pc-linux-gnu/bin/ld:
error: /tmp/cciGbsuB.o: requires dynamic R_X86_64_PC32 reloc against
'__gcov0__ZN12StringOptionD2Ev' which may overflow at runtime; recompile with
-fPIC
/usr/lib/gcc/x86_64-pc-linux-gnu/4.7.0/../../../../x86_64-pc-linux-gnu/bin/ld:
error: /tmp/cciGbsuB.o: requires dynamic R_X86_64_PC32 reloc against
'__gcov0__ZN12StringOptionD0Ev' which may overflow at runtime; recompile with
-fPIC
collect2: error: ld returned 1 exit status