ROSE output for environment-dependent macros is incorrect

ROSE does not correctly define the predefined macros for the environment specified. The following file test.c is an example. If __GNUC__ is defined, NOINLINE should be __attribute__((noinline)). If _MSC_VER is defined, NOINLINE should be __declspec(noinline). However, both show up in the resulting rose_test.c file.

#if defined(__GNUC__)
#  define NOINLINE  __attribute__((noinline))
#elif defined(_MSC_VER) && _MSC_VER>=1310
#  define NOINLINE  __declspec(noinline)
#else
#  define NOINLINE
#endif


NOINLINE int add(int a, int b) 
{ 
    return a + b;
}

int main(int argc, char **argv) {
    return 0;
}

If this is passed through ROSE the resulting output file rose_test.c is as follows:

#if defined(__GNUC__)
#  define NOINLINE  __attribute__((noinline))
#elif defined(_MSC_VER) && _MSC_VER>=1310
#  define NOINLINE  __declspec(noinline)
#else
#  define NOINLINE
#endif

__declspec(noinline) int  __attribute__((noinline)) add(int a,int b)
{
  return a + b;
}

int main(int argc,signed char **argv)
{
  return 0;
}

For some reason both __declspec (the MSVC syntax) and __attribute__ (Linux syntax) are in the function header. This will thus not compile.
Note: ROSE was compiled with flags --enable-microsoft-extensions and --with-wine.