[QE-users] FFTW Library not working properly

Erland Rachmad erland.rachmad at gmail.com
Mon May 14 11:32:49 CEST 2018

Dear QE users and developers,

Few days ago, my notebook is crashed and I have to reinstall my system
(Lubuntu-16.04) and QE-6.0.0.

Whenever I tried to install QE with external FFTW library (-D__FFTW3), I
always get this message while running pw.x:

Program received signal SIGSEGV: Segmentation fault - invalid memory

Backtrace for this error:
#0  0xB74E2C66
#1  0xB74E1D0E
#2  0xB7F5ECEF
#3  0xB776E9B8
#4  0xB7632104
#5  0xB76310DA
#6  0xB76310A2
#7  0xB7635A43
#8  0xB76355F2
#9  0xB7635A43
#10  0xB7629DFA
#11  0x8360DFB in __fft_scalar_MOD_cft_2xy at fft_scalar.FFTW3.f90:288
#12  0x8364589 in __fft_parallel_MOD_tg_cft3s at fft_parallel.f90:151
(discriminator 2)
#13  0x83650F2 in invfft_x_ at fft_interfaces.f90:137 (discriminator 2)
#14  0x81290DD in atomic_rho_ at atomic_rho.f90:150
#15  0x80CEF5B in potinit_ at potinit.f90:129
#16  0x8099893 in init_run_ at init_run.f90:111
#17  0x80DE9B7 in run_pwscf_ at run_pwscf.f90:80
#18  0x804EBC7 in MAIN__ at pwscf.f90:36

But, whenever I run pw.x with internal FFTW library (-D_FFTW) it always

So, how could I get pw.x run correctly with external FFTW library?

Erland Rachmad
Student at Engineering Physics Undergraduate Program
Insttitut Teknologi Bandung, Bandung, Indonesia
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