Dear List, I am using Cygwin (version: CYGWIN_NT-10.0 DESKTOP-3B1RTJD 3.0.7(0.338/5/3) 2019-04-30 18:08 x86_64 in Windows10) and GCC (7.4.0) in a x64(intel) quad core laptop. It was installed by setup-x86_64 dated:14-06-2019.
I really think that my GCC is working fine with Fortran and OpenMP for eg. the file, https://people.sc.fsu.edu/~jburkardt/f_src/jacobi_openmp/jacobi_openmp.f90 , is compiled/executed correctly. So I think my GCC/OMP installation is OK. Here I am trying to compile a Fortran-90 code called Siesta with CygWin (the Linux version of the code is working just fine with/without OpenMP support), and it works fine *without* OpenMP support (the binary , siesta1cpu.exe, which is created by arch.make.1cpu settings in ./Obj and using the following commands). -------------------------------------- CMD-1 ---------------------------------------- cd Obj make clean cp arch.make.1cpu arch.make make mv siesta.exe siesta1cpu.exe ./siesta1cpu.exe < h2o.fdf --------------------------------------- ---------------------------------------- Please also see the link for the directory for its source: https://drive.google.com/file/d/1uRrWJ2FAfVdJF-zIreUDZCknziZbCFV5/view?usp=sharing But if you make an OMP vesion (here i used GDB flags for core dump ), by executing these: ------------------------------------- CMD-2 ---------------------------------------- cd Obj make clean cp arch.make.OMP arch.make make ./siesta.exe < h2o.fdf ------------------------------------- ---------------------------------------- It executed but stops by showing a Segmentation Fault Error. I have attached <arch.make.*> files for Makefile from which Makefile gets compile flags etc. Actually I tried to modify <arch.make> file with several options and try to increase <stacksize> by <ulimit –s unlimited OR ulimit -s 10000000 > etc. But it doesn’t produce a good binary which doesn’t show seg.fault. When I analyze this binary using gdb it gives (<gdb siesta.exe> ; then <run h2o.fdf>): =================================================================================== Vna: Cut-off radius for the neutral-atom potential: 3.937239 comcore: Pseudo-core radius Rcore= 1.377587 atom: _________________________________________________________________________ Thread 1 "siesta" received signal SIGSEGV, Segmentation fault. ___chkstk_ms () at /usr/src/debug/gcc-7.4.0-1/libgcc/config/i386/cygwin.S:146 146 orq $0x0, (%rcx) /* probe there */ (gdb) where #0 ___chkstk_ms () at /usr/src/debug/gcc-7.4.0-1/libgcc/config/i386/cygwin.S:146 #1 0x000000010071b29f in ldau_specs::ldau_proj_gen (isp=<error reading variable: Cannot access memory at address 0xffc78f78>) at /home/gpkmo/siesta-4.1-b4/Src/ldau_specs.f:649 #2 0x00000001004f582e in initatom (ns=3) at /home/gpkmo/siesta-4.1-b4/Src/initatom.f:151 #3 0x000000010060c684 in m_siesta_init::siesta_init () at /home/gpkmo/siesta-4.1-b4/Src/siesta_init.F:379 #4 0x00000001010d359d in siesta () at /home/gpkmo/siesta-4.1-b4/Src/siesta.F:53 #5 0x00000001010d3669 in main (argc=2, argv=0x60004a790) at /home/gpkmo/siesta-4.1-b4/Src/siesta.F:10 #6 0x000000018004a816 in _cygwin_exit_return () at /usr/src/debug/cygwin-3.0.7-1/winsup/cygwin/dcrt0.cc:1022 #7 0x0000000180048353 in _cygtls::call2 (this=0xffffce00, func=0x1800497f0 <dll_crt0_1(void*)>, arg=0x0, buf=buf@entry=0xffffcdf0) at /usr/src/debug/cygwin-3.0.7-1/winsup/cygwin/cygtls.cc:40 #8 0x0000000180048404 in _cygtls::call (func=<optimized out>, arg=<optimized out>) at /usr/src/debug/cygwin-3.0.7-1/winsup/cygwin/cygtls.cc:27 #9 0x0000000000000000 in ?? () Backtrace stopped: previous frame inner to this frame (corrupt stack?) =================================================================================== So please help me to figure out why Cygwin's GCC gives: ___chkstk_ms () error ? Do I want to Compile OpenMP my own rather to use default's OpenMP libs? Hope that some GCC developers can try to compile Siesta-OMP version by using CMD-2's instructions and could execute it without any error! with thanks in advance Krishnamohan G P Mar Baselios College of Engineering and Technology Trivandrum INDIA 695015 -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
