[FLASH-USERS] Question on compiling Z-pinch example

[Liu, Baowei]

Hello Po-Yu,

These look like Lapack functions. Do you have the lapack library installed and linked? You might want to try manually adding the installed path to LIB_LAPACK =  in your Makefile.in file — something like:

LIB_LAPACK = -L YOUR_LAPACK_LIB_PATH -llapack -lblas

Let me know if still issues or other questions.

Thanks,
Baowei
________________________________
Baowei Liu
Center for Integrated Research Computing
University of Rochester
Bausch&Lomb 455A
(585)276-4105
________________________________

On Nov 27, 2025, at 11:45 PM, pchang <pchang at mail.ncku.edu.tw> wrote:

Dear FLASH developers and users,

I am using FLASH (v4.8) to simulate a 1D cylindrical Z-Pinch as a start for simulating Z-pinch. I tried to use the example "Z-pinch Simulation" and followed the manual to setup:

./setup -auto magnetoHD/ZPinch -1d +cylindrical +ug +usm3t +mtmmmt species=fill,line,vacu +mgd mgd_meshgroups=6 +hdf5typeio

However, when I compiled the code by using "make", I got the following error messages:

/bin/ld: /tmp/cc0mvl41.ltrans23.ltrans.o: in function `__gr_uhyprelinearleastsquares_MOD_lsq.constprop.0':
/home/pchang/Downloads/FLASH4.8/object/gr_uhypreLinearLeastSquares.F90:129: undefined reference to `dgelsy_'
/bin/ld: /home/pchang/Downloads/FLASH4.8/object/gr_uhypreLinearLeastSquares.F90:129: undefined reference to `dgelsy_'
/bin/ld: /tmp/cc0mvl41.ltrans23.ltrans.o: in function `__gr_uhypreparamesh_MOD_initweightset.constprop.0':
/home/pchang/Downloads/FLASH4.8/object/gr_uhypreLinearLeastSquares.F90:76: undefined reference to `dgeqrf_'
/bin/ld: /tmp/cc0mvl41.ltrans23.ltrans.o:/home/pchang/Downloads/FLASH4.8/object/gr_uhypreLinearLeastSquares.F90:83: undefined reference to `dorgqr_'
/bin/ld: /tmp/cc0mvl41.ltrans23.ltrans.o: in function `__gr_uhypreparamesh_MOD_initweightset.constprop.0':
/home/pchang/Downloads/FLASH4.8/object/gr_uhypreLinearLeastSquares.F90:146: undefined reference to `dgesv_'
/bin/ld: /tmp/cc0mvl41.ltrans23.ltrans.o:/home/pchang/Downloads/FLASH4.8/object/gr_uhypreLinearLeastSquares.F90:76: undefined reference to `dgeqrf_'
/bin/ld: /tmp/cc0mvl41.ltrans23.ltrans.o:/home/pchang/Downloads/FLASH4.8/object/gr_uhypreLinearLeastSquares.F90:146: undefined reference to `dgesv_'
collect2: error: ld returned 1 exit status
make: *** [Makefile:384: flash4] Error 1

Did I miss anything that caused the error? Thank you.

Cheers,

Po-Yu

--
Po-Yu Chang
Associate Professor
Institute of Space and Plasma Sciences (ISAPS)
National Cheng Kung University (NCKU)
No.1, University Road,
Tainan City 70101, Taiwan
(TEL) +886-6-2757575 ext. 65916
pchang at mail.ncku.edu.tw
https://capst.ncku.edu.tw/PGS/

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