complex vs. __builtin_cpow

[Benjamin Kosnik]

Gaby: 

Your new patch gives two new errors on x86/linux:

FAIL: 26_numerics/complex/13450.cc (test for excess errors)
WARNING: 26_numerics/complex/13450.cc compilation failed to produce executable
FAIL: 26_numerics/complex/pow.cc (test for excess errors)
WARNING: 26_numerics/complex/pow.cc compilation failed to produce executable
 
A sample from the log file:

/mnt/hd/bld/gcc/i686-pc-linux-gnu/libstdc++-v3/include/complex: In function `std::complex<_Tp> std::log(conststd::complex<_Tp>&) [with _Tp = float]':
/mnt/hd/bld/gcc/i686-pc-linux-gnu/libstdc++-v3/include/complex:891:   instantiated from `std::complex<_Tp> std::pow(conststd::complex<_Tp>&, const_Tp&) [with _Tp = float]'
/mnt/hd/src/gcc/libstdc++-v3/testsuite/26_numerics/complex/13450.cc:36:   instantiated from `void test01_do(T, T) [with T = float]'
/mnt/hd/src/gcc/libstdc++-v3/testsuite/26_numerics/complex/13450.cc:48:   instantiated from here
/mnt/hd/bld/gcc/i686-pc-linux-gnu/libstdc++-v3/include/complex:739: error: no matching function for call to `__complex_log(const float __complex__&)'

Now, on line 736 of std_complex.h I see:

  /*
  inline __complex__ float
  __complex_log(__complex__ float __z) { return __builtin_clogf(__z); }

  inline __complex__ double
  __complex_log(__complex__ double __z) { return __builtin_clog(__z); }

  inline __complex__ long double
  __complex_log(const __complex__ long double& __z)
  { return __builtin_clog(__z); } */

Is this supposed to be uncommented?

-benjamin