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</o:shapelayout></xml><![endif]--></head><body lang=DE-CH link=blue vlink=purple style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal><span lang=EN-GB style='mso-fareast-language:EN-US'>Thanks for the hint. Now (with copying the font files from another distribution) I can compile NCL without error message on Amazon Linux 2. However, when I run a script with NCL I’m still receiving a message ‘</span><span lang=EN-GB>Segmentation fault’. I’m also compiling it with the -g option, but don’t get some additional hints (see below). I found out that the segmentation fault occurs when the function wrf_contour() is called. Other things seem to work well. I can read NetCDF-4 files without problems, calculate CAPE and other diagnostics. I also managed to install NCL version 6.6.2 from EPEL8 on RHEL8 (ARM64, AWS <em><span style='font-family:"Calibri",sans-serif;font-style:normal'>Graviton2</span></em>) without any problems. However, exactly the same issue (Segmentation fault) occurred, when calling wrf_contour(). It seems to me that other parts then the fontcap compilation have similar problems. Maybe the problem is related to the CPU AWS <em><span style='font-family:"Calibri",sans-serif;font-style:normal'>Graviton2, but it’s also little endian.</span></em><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB style='mso-fareast-language:EN-US'>*****<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB style='mso-fareast-language:EN-US'>> </span><span lang=EN-GB>ncl wrf_mucape_cin.ncl</span><span lang=EN-GB style='mso-fareast-language:EN-US'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB>Copyright (C) 1995-2019 - All Rights Reserved <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>University Corporation for Atmospheric Research NCAR Command Language Version 6.6.2 <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>The use of this software is governed by a License Agreement. <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>See </span><a href="http://www.ncl.ucar.edu/"><span lang=EN-GB>http://www.ncl.ucar.edu/</span></a><span lang=EN-GB> for more details. <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>(0)Working on time: 2021-08-31_00:00:00 <o:p></o:p></span></p><p class=MsoNormal><b><span lang=EN-GB>Segmentation fault<o:p></o:p></span></b></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB>*****<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>> lscpu<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB>Architecture: aarch64 <o:p></o:p></span></p><p class=MsoNormal><b><span lang=EN-GB>Byte Order: Little Endian <o:p></o:p></span></b></p><p class=MsoNormal><span lang=EN-GB>CPU(s): 2 On-line <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>CPU(s) list: 0,1 <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>Thread(s) per core: 1 Core(s) per socket: 2 <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>Socket(s): 1 NUMA node(s): 1 <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>Model: 1 <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>BogoMIPS: 243.75 <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>L1d cache: 64K <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>L1i cache: 64K <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>L2 cache: 1024K <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>L3 cache: 32768K <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>NUMA node0 CPU(s): 0,1 <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>Flags: fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm lrcpc dcpop asimddp ssbs</span><span lang=EN-GB style='mso-fareast-language:EN-US'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=DE>Von:</span></b><span lang=DE> ncl-install <ncl-install-bounces@mailman.ucar.edu> <b>Im Auftrag von </b>Dave Allured - NOAA Affiliate via ncl-install<br><b>Gesendet:</b> Samstag, 4. September 2021 02:49<br><b>An:</b> ncl-install@mailman.ucar.edu<br><b>Betreff:</b> Re: [ncl-install] Segmentation fault when compiling NCL from source on Amazon Linux 2 (ARM64)<o:p></o:p></span></p></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>Oops, sent to wrong list. Now I CC to ncl-install.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>On Fri, Sep 3, 2021 at 4:39 PM Dave Allured - NOAA Affiliate <<a href="mailto:dave.allured@noaa.gov">dave.allured@noaa.gov</a>> wrote:<o:p></o:p></p></div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm'><div><div><p class=MsoNormal>I think fontc is a standalone program that is used only during the NCL build process. You may be able to sidestep the program issue completely, by simply copying over the compiled fontcap files from a different build. Look at one of the X86 binary distributions, or a working install on any X86 system. I suspect that the only compatibility issue is endianness of 16- and 32-bit integers. ARM64 and X86 should both be little endian; not sure because I lack ARM experience. <o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>On Wed, Sep 1, 2021 at 11:37 AM Michael Graf via ncl-install <<a href="mailto:ncl-install@mailman.ucar.edu" target="_blank">ncl-install@mailman.ucar.edu</a>> wrote:<o:p></o:p></p></div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm'><p class=MsoNormal>Dear all, <br><br>Thanks for adding me to the NCL mailing list.<br><br>I am trying to compile the latest NCL Version 6.6.2 from scratch on Amazon<br>Linux 2 (ARM64 architecture). Everything works fine except that a<br>segmentation fault occurs when the fontcaps are compiled respectively when<br>the fontc binary is processing fontcaps (see output below). No other error<br>occurs. The ncl binary is compiled and it can be started without problems,<br>but when I run a plotting script a segmentation fault occurs that is<br>probably related to the compilation error in fontcap. <br><br>I also compiled a minimal version with as few dependencies as possible (no<br>GDAL, HDF5, NETCDF-4 and so on) to rule out that they cause the problem<br>without any effect. I have also randomly tried different compiler options<br>for the compilation in the folder fontcap, but the error always remains the<br>same. I suspect that the compiler is causing the problem, but there is no<br>alternative on Amazon Linux 2 so far. I'm using gfortran (version 7.3.1) and<br>gcc (version 7.3.1), but here only Fortran77 code seems to be compiled. <br><br>It would be great if somebody has a hint how to overcome this problem. Maybe<br>there is another option, so that I don't have to build it from scratch. The<br>installation with conda does not work on ARM64. <br><br>Best, Michael<br><br>************************************************************************<br>Making ./common/src/fontcap<br>make[4]: Entering directory<br>`/home/ec2-user/wrf/NCL/ncl_ncarg-6.6.2/common/src/fontcap'<br>gfortran -fPIC -fno-second-underscore -fno-range-check -fopenmp -O -c<br>cfaamn.f<br>gfortran -fPIC -fno-second-underscore -fno-range-check -fopenmp -O -c -o<br>cfrdln.o cfrdln.f<br>gfortran -fPIC -fno-second-underscore -fno-range-check -fopenmp -O -c -o<br>cfwrit.o cfwrit.f<br>gfortran -fPIC -fno-second-underscore -fno-range-check -fopenmp -O -c -o<br>ffgttk.o ffgttk.f<br>gfortran -fPIC -fno-second-underscore -fno-range-check -fopenmp -O -c -o<br>ffinfo.o ffinfo.f<br>gfortran -fPIC -fno-second-underscore -fno-range-check -fopenmp -O -c -o<br>ffphol.o ffphol.f<br>gfortran -fPIC -fno-second-underscore -fno-range-check -fopenmp -O -c -o<br>ffppkt.o ffppkt.f<br>gfortran -fPIC -fno-second-underscore -fno-range-check -fopenmp -O -c -o<br>ffprcf.o ffprcf.f<br>gfortran -fPIC -fno-second-underscore -fno-range-check -fopenmp -O -c -o<br>ffprsa.o ffprsa.f<br>gfortran -fPIC -fno-second-underscore -fno-range-check -fopenmp -O -c -o<br>fftbkd.o fftbkd.f<br>gfortran -fPIC -fno-second-underscore -fno-range-check -fopenmp -O -c -o<br>fftkin.o fftkin.f<br>gfortran -fPIC -fno-second-underscore -fno-range-check -fopenmp -O -c -o<br>sffndc.o sffndc.f<br>gfortran -fPIC -fno-second-underscore -fno-range-check -fopenmp -O -c -o<br>sfgtin.o sfgtin.f<br>gfortran -fPIC -fno-second-underscore -fno-range-check -fopenmp -O -c -o<br>sfgtkw.o sfgtkw.f<br>gfortran -fPIC -fno-second-underscore -fno-range-check -fopenmp -O -c -o<br>sfprcf.o sfprcf.f<br>gfortran -fPIC -fno-second-underscore -fno-range-check -fopenmp -O -c -o<br>sfskbk.o sfskbk.f<br>gfortran -fPIC -fno-second-underscore -fno-range-check -fopenmp -O -c -o<br>sftbkd.o sftbkd.f<br>gfortran -fPIC -fno-second-underscore -fno-range-check -fopenmp -O -o<br>fontc cfaamn.o cfrdln.o cfwrit.o ffgttk.o ffinfo.o ffphol.o ffppkt.o<br>ffprcf.o ffprsa.o fftb<br>kd.o fftkin.o sffndc.o sfgtin.o sfgtkw.o sfprcf.o sfskbk.o sftbkd.o<br>-L../../.././common/src/libncarg_c -lncarg_c -L/usr/local/ncarg_gdal/lib<br>-L/usr/local/lib<br>Processing fontcap font1<br><br>Program received signal SIGSEGV: Segmentation fault - invalid memory<br>reference.<br><br>Backtrace for this error:<br>#0 0x40001dcb99a3<br>#1 0x40001dcb888f<br>#2 0x40001dc90667<br>#3 0x403bdc<br>#4 0x403c63<br>#5 0x4032af<br>#6 0x400efb<br>#7 0x401213<br>#8 0x40001df5ace3<br>#9 0x400d07<br>make[4]: *** [font1] Segmentation fault<br>make[4]: Leaving directory<br>`/home/ec2-user/wrf/NCL/ncl_ncarg-6.6.2/common/src/fontcap'<br><br>************************************************************************<br>gfortran -g -fbacktrace -Wall -fcheck=all -o fontc cfaamn.o cfrdln.o<br>cfwrit.o ffgttk.o ffinfo.o ffphol.o ffppkt.o ffprcf.o ffprsa.o<br>fftbkd.o fftkin.o sffndc.o<br> sfgtin.o sfgtkw.o sfprcf.o sfskbk.o sftbkd.o<br>-L../../.././common/src/libncarg_c -lncarg_c -L/usr/local/ncarg/lib<br>-L/usr/local/lib <br>Processing fontcap font1<br><br>Program received signal SIGSEGV: Segmentation fault - invalid memory<br>reference.<br><br>Backtrace for this error:<br>#0 0x40001a29595b in ???<br>#1 0x40001a29488f in ???<br>#2 0x40001a26c667 in ???<br>#3 0x40723c in ???<br>#4 0x4072e7 in ???<br>#5 0x405c97 in sfgtwk_<br>at /home/ec2-user/wrf/NCL/ncl_ncarg-6.6.2/common/src/fontcap/sfgtkw.f:95<br>#6 0x4061cb in sfprcf_<br>at /home/ec2-user/wrf/NCL/ncl_ncarg-6.6.2/common/src/fontcap/sfprcf.f:108<br>#7 0x40119b in cfaamn<br>at /home/ec2-user/wrf/NCL/ncl_ncarg-6.6.2/common/src/fontcap/cfaamn.f:304<br>#8 0x401633 in main<br>at /home/ec2-user/wrf/NCL/ncl_ncarg-6.6.2/common/src/fontcap/cfaamn.f:358<br>make: *** [font1] Segmentation fault<br><br>************************************************************************<br>gfortran -g -fsanitize=address,undefined -o fontc cfaamn.o cfrdln.o<br>cfwrit.o ffgttk.o ffinfo.o ffphol.o ffppkt.o ffprcf.o ffprsa.o<br>fftbkd.o fftkin.o sffndc.o <br> sfgtin.o sfgtkw.o sfprcf.o sfskbk.o sftbkd.o<br>-L../../.././common/src/libncarg_c -lncarg_c -L/usr/local/ncarg/lib<br>-L/usr/local/lib <br>Processing fontcap font1<br>ASAN:DEADLYSIGNAL<br>=================================================================<br>==2477==ERROR: AddressSanitizer: SEGV on unknown address 0x100005104df40 (pc<br>0x00000040ffd0 bp 0xffffd104daf0 sp 0xffffd104daf0 T0)<br>==2477==The signal is caused by a READ memory access.<br> #0 0x40ffcf in gbyte_<br>(/home/ec2-user/wrf/NCL/ncl_ncarg-6.6.2/common/src/fontcap/fontc+0x40ffcf)<br> #1 0x410057 in gbytes_<br>(/home/ec2-user/wrf/NCL/ncl_ncarg-6.6.2/common/src/fontcap/fontc+0x410057)<br> #2 0x40deab in sfprcf_<br>/home/ec2-user/wrf/NCL/ncl_ncarg-6.6.2/common/src/fontcap/sfprcf.f:117<br> #3 0x40213f in cfaamn<br>/home/ec2-user/wrf/NCL/ncl_ncarg-6.6.2/common/src/fontcap/cfaamn.f:304<br> #4 0x402d7b in main<br>/home/ec2-user/wrf/NCL/ncl_ncarg-6.6.2/common/src/fontcap/cfaamn.f:358<br> #5 0x40002cbc7ce3 in __libc_start_main (/lib64/libc.so.6+0x1fce3)<br> #6 0x4018a7<br>(/home/ec2-user/wrf/NCL/ncl_ncarg-6.6.2/common/src/fontcap/fontc+0x4018a7)<br><br>AddressSanitizer can not provide additional info.<br>SUMMARY: AddressSanitizer: SEGV<br>(/home/ec2-user/wrf/NCL/ncl_ncarg-6.6.2/common/src/fontcap/fontc+0x40ffcf)<br>in gbyte_<br>==2477==ABORTING<br>make: *** [font1] Error 1<br><br>_______________________________________________<br>ncl-install mailing list<br>List instructions, subscriber options, unsubscribe:<br><a href="https://mailman.ucar.edu/mailman/listinfo/ncl-install" target="_blank">https://mailman.ucar.edu/mailman/listinfo/ncl-install</a><o:p></o:p></p></blockquote></div></div></blockquote></div></div></div></body></html>