- making cft_b_omp thread safe, all threads now initialize their own private FFTW PLAN.
  This parallelization is supported only for internal FFTW.
  It can be extended to other libraries supporting thread nesting, not sure if MKL/FFTW3 can do it.



git-svn-id: http://qeforge.qe-forge.org/svn/q-e/trunk/espresso@11133 c92efa57-630b-4861-b058-cf58834340f0
Clarification of what fft_scatter does


git-svn-id: http://qeforge.qe-forge.org/svn/q-e/trunk/espresso@11134 c92efa57-630b-4861-b058-cf58834340f0
New modular configure based on GNU M4 macros -- still beta

git-svn-id: http://qeforge.qe-forge.org/svn/q-e/trunk/espresso@11135 c92efa57-630b-4861-b058-cf58834340f0
GCC complains, logicals must be compared with .eqv. instead of ==

git-svn-id: http://qeforge.qe-forge.org/svn/q-e/trunk/espresso@11136 c92efa57-630b-4861-b058-cf58834340f0