Installation

Question

Good day,
I installed Cygwin with gcc-core (C-compiler); gcc-g++ (C++ compiler); gdb (GNU debugger) and make (make utility ). The folder is 'C:\cygwin64'
Also I cloned itensor in folder 'C:\itensor'.

Tell me plz what I should modify or add in the file 'options.make' in order to install itensor?

when I use commands 'cp options.mk.sample options.mk' in itensor folder and
'make' I get an error:

Configure: Writing current dir to this_dir.mk

Building ITensor library

make[1]: enter to directory «/cygdrive/c/itensor/itensor»
Compiling itensor/tensor/lapackwrap.cc with optimizations
In file included from tensor/lapackwrap.cc:1:0:
/cygdrive/c/itensor/itensor/tensor/lapackwrap.h:73:10: fatal error: Accelerate/Accelerate.h: No such file or directory
#include <Accelerate/Accelerate.h>
^~~~~~~~~~~~~~~~~~~~~~~~~
Compilation stops.
Failure while executing command: g++ -m64 -std=c++11 -fPIC -c -I/cygdrive/c/itensor -O2 -DNDEBUG -Wall -DPLATFORMmacos -D__ASSERTMACROSDEFINEVERSIONSWITHOUTUNDERSCORES=0 -o tensor/lapackwrap.o tensor/lapackwrap.cc
make[1]: *** [Makefile:59: tensor/lapackwrap.o] Error 1
make[1]: exit from directory «/cygdrive/c/itensor/itensor»
make: *** [Makefile:14: itensor] Error 2

Answer 1

For cygwin, I don't know if I recall all of the libraries and correct settings, but I believe the key ones are:

1. install the lapack and lapack-devel (or similarly named) libraries with Cygwin

2. in your "options.mk" file, comment out ("#") the lines PLATFORM=macos and BLASLAPACKLIBFLAGS=-framework Accelerate, because as you can see from the comments above those lines, those are the settings for Mac / Apple systems

3. uncomment the PLATFORM and BLASLAPACKLIBFLAGS just below, suitable for general GNU/LINUX systems

I think with those changes it should compile and work. But if you get other error messages please let me know.

Best regards,
Miles

Comments

I got the following error:

/usr/lib/gcc/x86_64-pc-cygwin/7.4.0/../../../../x86_64-pc-cygwin/bin/as: .debug_objs/itensor_operators.o: section .debug_frame$_ZN7itensor6detail5FuncTINS0_8CallWrapINS0_12RegisterTaskINS0_7TwoArgsISt10shared_ptrINS_6ITDataEENS_6CPDataEEEONS_8ContractINS_7IQIndexEEENS_8NoneTypeEEESC_KNS_6ScalarISt7complexIdEEESE_S7_S8_EENS_8TypeListIJNS_6QDenseISI_EENS_9QCombinerENS_5QDiagIdEENSQ_ISI_EENS_6QMixedIdEENST_ISI_EENSG_IdEESJ_EEEE7applyToERKSO_: string table overflow at offset 10000178
/tmp/cco9rlzo.s: Assembler messages:
/tmp/cco9rlzo.s: Fatal error: can't close .debug_objs/itensor_operators.o: file is too huge
Failure while executing command: g++ -std=c++11 -Wa,-mbig-obj -O2 -fPIC -c -I/cygdrive/c/itensor  -DDEBUG -g -Wall -pedantic -DPLATFORM_lapack -D__ASSERT_MACROS_DEFINE_VERSIONS_WITHOUT_UNDERSCORES=0 -o .debug_objs/itensor_operators.o itensor_operators.cc
make[1]: *** [Makefile:64: .debug_objs/itensor_operators.o] Ошибка 1
make[1]: exit from directory«/cygdrive/c/itensor/itensor»
make: *** [Makefile:14: itensor] error 2

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Hi, so I read somewhere that if you change the -O2 compiler flag to -O3, it can alleviate this issue. (Which is not really an issue with ITensor per se, but rather with the gcc compiler on cygwin.) Could you try chaging the flag "OPTIMIZATIONS" to use -O3 instead of -O2 and see if that works? Thanks -

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the same error occured:
############################################################
$ make

Configure: Writing current dir to this_dir.mk

Building ITensor library

make[1]: enter to directory «/cygdrive/c/ProgramsCalculation/itensor/itensor»
Compiling itensor/util/args.cc with optimizations
Compiling itensor/util/input.cc with optimizations
Compiling itensor/util/cputime.cc with optimizations
Compiling itensor/tensor/lapack_wrap.cc with optimizations
Compiling itensor/tensor/vec.cc with optimizations
Compiling itensor/tensor/mat.cc with optimizations
Compiling itensor/tensor/gemm.cc with optimizations
Compiling itensor/tensor/algs.cc with optimizations
Compiling itensor/tensor/contract.cc with optimizations
Compiling itensor/itdata/dense.cc with optimizations
Compiling itensor/itdata/combiner.cc with optimizations
Compiling itensor/itdata/diag.cc with optimizations
Compiling itensor/itdata/qdense.cc with optimizations
Compiling itensor/itdata/qcombiner.cc with optimizations
Compiling itensor/itdata/qdiag.cc with optimizations
Compiling itensor/itdata/qmixed.cc with optimizations
Compiling itensor/itdata/scalar.cc with optimizations
Compiling itensor/index.cc with optimizations
Compiling itensor/itensor_interface.cc with optimizations
Compiling itensor/itensor_operators.cc with optimizations
Compiling itensor/itensor.cc with optimizations
Compiling itensor/qn.cc with optimizations
Compiling itensor/iqindex.cc with optimizations
Compiling itensor/iqtensor.cc with optimizations
Compiling itensor/spectrum.cc with optimizations
Compiling itensor/decomp.cc with optimizations
Compiling itensor/svd.cc with optimizations
Compiling itensor/hermitian.cc with optimizations
Compiling itensor/global.cc with optimizations
Compiling itensor/mps/mps.cc with optimizations
Compiling itensor/mps/mpsalgs.cc with optimizations
Compiling itensor/mps/mpo.cc with optimizations
Compiling itensor/mps/mpoalgs.cc with optimizations
Compiling itensor/mps/autompo.cc with optimizations
Building static library /cygdrive/c/ProgramsCalculation/itensor/lib/libitensor.a
ar: creating /cygdrive/c/ProgramsCalculation/itensor/lib/libitensor.a
Compiling itensor/util/args.cc in debug mode
Compiling itensor/util/input.cc in debug mode
Compiling itensor/util/cputime.cc in debug mode
Compiling itensor/tensor/lapack_wrap.cc in debug mode
Compiling itensor/tensor/vec.cc in debug mode
Compiling itensor/tensor/mat.cc in debug mode
Compiling itensor/tensor/gemm.cc in debug mode
Compiling itensor/tensor/algs.cc in debug mode
Compiling itensor/tensor/contract.cc in debug mode
Compiling itensor/itdata/dense.cc in debug mode
Compiling itensor/itdata/combiner.cc in debug mode
Compiling itensor/itdata/diag.cc in debug mode
Compiling itensor/itdata/qdense.cc in debug mode
Compiling itensor/itdata/qcombiner.cc in debug mode
Compiling itensor/itdata/qdiag.cc in debug mode
Compiling itensor/itdata/qmixed.cc in debug mode
Compiling itensor/itdata/scalar.cc in debug mode
Compiling itensor/index.cc in debug mode
Compiling itensor/itensor_interface.cc in debug mode
Compiling itensor/itensor_operators.cc in debug mode
/usr/lib/gcc/x86_64-pc-cygwin/7.4.0/../../../../x86_64-pc-cygwin/bin/as: .debug_objs/itensor_operators.o: section .debug_frame$_ZN7itensor6detail5FuncTINS0_8CallWrapINS0_12RegisterTaskINS0_7TwoArgsISt10shared_ptrINS_6ITDataEENS_6CPDataEEEONS_8ContractINS_7IQIndexEEENS_8NoneTypeEEESC_KNS_6ScalarISt7complexIdEEESE_S7_S8_EENS_8TypeListIJNS_6QMixedISI_EENSG_IdEESJ_EEEE7applyToERKSO_: string table overflow at offset 10000022
/tmp/cckF25CS.s: Assembler messages:
/tmp/cckF25CS.s: Fatal error: can't close .debug_objs/itensor_operators.o: File is too big
Failure while executing command: g++ -std=c++11 -Wa,-mbig-obj -O3 -fPIC -c -I/cygdrive/c/ProgramsCalculation/itensor  -DDEBUG -g -Wall -pedantic -DPLATFORM_lapack -D__ASSERT_MACROS_DEFINE_VERSIONS_WITHOUT_UNDERSCORES=0 -o .debug_objs/itensor_operators.o itensor_operators.cc
make[1]: *** [Makefile:64: .debug_objs/itensor_operators.o] Error 1
make[1]: Exit from directory«/cygdrive/c/ProgramsCalculation/itensor/itensor»
make: *** [Makefile:14: itensor] Error 2
###########################################################

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Do you have access to a computer running Linux/Unix or MacOS? Such as a cluster computer at your institution?