cblas_cdotc_sub not declared in this scope

Hi,

‌

It seems that some of the recent BLAS extensions have made compiling without BLAS mode enabled fail. (Within the last 10 commits.) It isn’t an issue with 3.6, but when working with head, I get an error:

In file included from vec/blaze/blaze/math/blas/dotc.h:44,
                 from vec/blaze/blaze/math/BLAS.h:44,
                 from vec/blaze/blaze/Math.h:47,
                 from include/sketch/rnla.h:2,
                 from testsrc/cscomp.cpp:1:
vec/blaze/blaze/math/blas/cblas/dotc.h: In function 'std::complex<float> blaze::dotc(blaze::blas_int_t, const std::complex<float>*, blaze::blas_int_t, const std::complex<float>*, blaze::blas_int_t)':
vec/blaze/blaze/math/blas/cblas/dotc.h:190:4: error: 'cblas_cdotc_sub' was not declared in this scope
  190 |    cblas_cdotc_sub( n, reinterpret_cast<const float*>( x ), incX,
      |    ^~~~~~~~~~~~~~~
vec/blaze/blaze/math/blas/cblas/dotc.h: In function 'std::complex<double> blaze::dotc(blaze::blas_int_t, const std::complex<double>*, blaze::blas_int_t, const std::complex<double>*, blaze::blas_int_t)':
vec/blaze/blaze/math/blas/cblas/dotc.h:230:4: error: 'cblas_zdotc_sub' was not declared in this scope
  230 |    cblas_zdotc_sub( n, reinterpret_cast<const double*>( x ), incX,
      |    ^~~~~~~~~~~~~~~
In file included from vec/blaze/blaze/math/blas/dotu.h:44,
                 from vec/blaze/blaze/math/BLAS.h:45,
                 from vec/blaze/blaze/Math.h:47,
                 from include/sketch/rnla.h:2,
                 from testsrc/cscomp.cpp:1:
vec/blaze/blaze/math/blas/cblas/dotu.h: In function 'std::complex<float> blaze::dotu(blaze::blas_int_t, const std::complex<float>*, blaze::blas_int_t, const std::complex<float>*, blaze::blas_int_t)':
vec/blaze/blaze/math/blas/cblas/dotu.h:190:4: error: 'cblas_cdotu_sub' was not declared in this scope
  190 |    cblas_cdotu_sub( n, reinterpret_cast<const float*>( x ), incX,
      |    ^~~~~~~~~~~~~~~
vec/blaze/blaze/math/blas/cblas/dotu.h: In function 'std::complex<double> blaze::dotu(blaze::blas_int_t, const std::complex<double>*, blaze::blas_int_t, const std::complex<double>*, blaze::blas_int_t)':
vec/blaze/blaze/math/blas/cblas/dotu.h:230:4: error: 'cblas_zdotu_sub' was not declared in this scope
  230 |    cblas_zdotu_sub( n, reinterpret_cast<const double*>( x ), incX,

The axpy header has BLAZE_BLAS_MODE wrappers around function declarations, while dotu doesn’t. I’m sure it’s just growing pains with adding features (for which I thank you).

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