Compilation problem with templates while using option -m64

Question

Hi,
I have compilation problem with template while using option -m64.
No problem while using option -m32.
@ uname -a
SunOS snt5010 5.10 Generic_127111-11 sun4v sparc SUNW,SPARC-Enterprise-T5220
$ CC -V
CC: Sun C++ 5.9 SunOS_sparc Patch 124863-01 2007/07/25
Here is some C++ program
############# foo5.cpp #############
template <typename T, T N, unsigned long S = sizeof(T) * 8>
struct static_number_of_ones
static const T m_value = static_number_of_ones<T, N, S - 1>::m_value >> 1;
static const unsigned long m_count = static_number_of_ones<T, N, S - 1>::m_count + (static_number_of_ones<T, N, S - 1>::m_value & 0x1);
template <typename T, T N>
struct static_number_of_ones<T, N, 0>
static const T m_value = N;
static const unsigned long m_count = 0;
template <typename T, T N>
struct static_is_power_of_2
static const bool m_result = (static_number_of_ones<T,N>::m_count == 1);
template <unsigned long N>
struct static_number_is_power_of_2
static const bool m_result = (static_number_of_ones<unsigned long, N>::m_count == 1);
int main(int argc)
int ret = 0;
if (argc > 1)
ret += static_is_power_of_2<unsigned short, 16>::m_result;
ret += static_is_power_of_2<unsigned int, 16>::m_result;
ret += static_is_power_of_2<unsigned long, 16>::m_result;
ret += static_number_is_power_of_2<16>::m_result;
else
ret += static_is_power_of_2<unsigned short, 17>::m_result;
ret += static_is_power_of_2<unsigned int, 17>::m_result;
ret += static_is_power_of_2<unsigned long, 17>::m_result;
ret += static_number_is_power_of_2<17>::m_result;
return ret;
Compiation:
@ CC -m32 foo5.cpp
// No problem
@ CC -m64 foo5.cpp
"foo5.cpp", line 20: Error: An integer constant expression is required here.
"foo5.cpp", line 36: Where: While specializing "static_is_power_of_2<unsigned long, 16>".
"foo5.cpp", line 36: Where: Specialized in non-template code.
"foo5.cpp", line 26: Error: An integer constant expression is required here.
"foo5.cpp", line 37: Where: While specializing "static_number_is_power_of_2<16>".
"foo5.cpp", line 37: Where: Specialized in non-template code.
"foo5.cpp", line 20: Error: An integer constant expression is required here.
"foo5.cpp", line 43: Where: While specializing "static_is_power_of_2<unsigned long, 17>".
"foo5.cpp", line 43: Where: Specialized in non-template code.
"foo5.cpp", line 26: Error: An integer constant expression is required here.
"foo5.cpp", line 44: Where: While specializing "static_number_is_power_of_2<17>".
"foo5.cpp", line 44: Where: Specialized in non-template code.
4 Error(s) detected.
Predefined macro:
@ CC -m32 -xdumpmacros=defs foo5.cpp | & tee log32
@ CC -m64 -xdumpmacros=defs foo5.cpp | & tee log64
@ diff log32 log64
7c7
< #define __TIME__ "09:24:58"
#define __TIME__ "09:25:38"20c20
< #define __sparcv8plus 1
#define __sparcv9 1[snipped]
=========================
What is wrong?
Thanks,
Alex Vinokur

Answer 1

Bug 6749491 has been filed for this problem. It will be visible at [http://bugs.sun.com] in a day or two.
If you have a service contract with Sun, you can ask to have this bug's priority raised, and get a pre-release version of a compiler patch that fixes the problem.
Otherwise, you can check for new patches from time to time at
[http://developers.sun.com/sunstudio/downloads/patches/]
and see whether this bug is listed as fixed.