[Pw_forum] Compile QE v-4.3.2

[Vo, Trinh (398C)]

Dear QE users,

In compiling QE in order to know whether the  external fftw  library included in Intel MKL (version 13)  is used,  instead of internal fftw is used, I changed the name of the file "fftw.c" in the directory "clib" into different name.  The compilation failed with following message:

make[1]: *** No rule to make target `fftw.c', needed by `fft_stick.o'.  Stop.
make[1]: Leaving directory `/home6/ttvo/espresso-4.3.2_test/clib'
make: *** [libs] Error 2

This may mean that the the code failed to find the external library and continued to use the internal one.  I have one question to confirm what I understand, and  I  appreciate if  you could help. if the external library is used, does the internal "fftw.c" is still called by some subroutine in the code?

Thank you,

Trinh Vo

JPL/CalTech
Research and Technology Staff

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