Dear all:

I am having trouble with the protopoy of “pow” in C++.

I am asking suggestion to avoid to manualy change a system

include file. With the change reported below I was able to succesfully compile my code. However since this is a multiplatform code

I would like to advoid such local changes.

Any suggestions?

Details below:

In particular I had to manualy add this prototype in: math.h

```
master:/opt/cluster # diff /opt/cluster/pgi/linux86-64/5.2/include/math.h /opt/cluster/pgi/linux86-64/5.2/include/math.h.orig -p
*** /opt/cluster/pgi/linux86-64/5.2/include/math.h Wed Dec 22 12:01:51 2004
--- /opt/cluster/pgi/linux86-64/5.2/include/math.h.orig Wed Dec 22 11:44:17 2004
*************** double exp (double x);
*** 126,132 ****
double log (double x);
double log10 (double x);
double pow (double x, double y);
- double pow (double x, int n);
double sqrt (double x);
double ceil (double x);
double floor (double x);
--- 126,131 ----
*************** double log(double);
*** 211,217 ****
double log10(double);
double exp(double);
double pow(double,double);
- double pow(double,int);
}
#endif
--- 210,215 ----
```

The headr part of the code where the error was generate

is:

```
#include <assert.h>
#include <limits.h>
#include <math.h>
#include <stdlib.h>
#include <string.h>
#include <iostream>
#include <sstream>
#include <vector>
#include "cctk.h"
#include "cctk_Parameters.h"
#include "util_ErrorCodes.h"
#include "util_Table.h"
#include "bbox.hh"
#include "defs.hh"
#include "dist.hh"
#include "ggf.hh"
#include "gh.hh"
#include "vect.hh"
#include "carpet.hh"
extern "C" {
static const char* rcsid = "$Header: /home/cvs/carpet/Carpet/Carpet/src/SetupGH.cc,v 1.85 2004/08/07 20:07:27 schnetter Exp $";
CCTK_FILEVERSION(Carpet_Carpet_SetupGH_cc)
}
...
```

The original error I got was:

```
cd /home/albert2/bgiacoma/Cactus/configs/test_carpet/scratch;
pgCC -Drestrict= --no_using_std --instantiate=used -fast -O3 \
-Minfo -Mneginfo -Mvect=assoc -c \
-o $current_wd/SetupGH.cc.o $current_wd/SetupGH.cc \
-I"/opt/cluster/hdf5/include" \
.......(mo include directive)....
-DTHORN_IS_Carpet -DCCODE \
"/home/albert2/bgiacoma/Cactus/configs/test_carpet/build/Carpet/SetupGH.cc", line 285: warning:
statement is unreachable
return op_error;
^
"/home/albert2/bgiacoma/Cactus/configs/test_carpet/build/Carpet/SetupGH.cc", line 424: error:
more than one instance of overloaded function "pow" matches the
argument list:
function "pow(double, double)"
function "std::pow(const std::complex<long double> &, int)"
function "std::pow(const double &, const std::complex<double> &)"
function "std::pow(const std::complex<double> &, int)"
function "std::pow(const std::complex<float> &, int)"
argument types are: (double, int)
= base_spacing * pow (CCTK_REAL(convergence_factor), basemglevel);
^
"/home/albert2/bgiacoma/Cactus/arrangements/Carpet/CarpetLib/src/vect.hh", line
563: error:
more than one instance of overloaded function "pow" matches the
argument list:
function "pow(double, double)"
function "std::pow(const std::complex<long double> &, int)"
function "std::pow(const double &, const std::complex<double> &)"
function "std::pow(const std::complex<double> &, int)"
function "std::pow(const std::complex<float> &, int)"
argument types are: (const double, const int)
for (int d=0; d<D; ++d) r[d]=pow(a[d],b[d]);
^
detected during instantiation of "vect<T, DD> pow(const vect<T, DD>
&, const vect<U, D> &) [with T=double, U=int, D=3]"
```

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