Changes for windows

[philippdonabauer]

To make it useable under Windows please change Following lines. Then it works for Python!

In file mmap_win32.c add following code:
#pragma comment(lib, "Shell32.lib")

and in python/core.c change the #include <alloca.h> in:
#if defined(_WIN32) || defined(WIN32) #include <malloc.h> #else #include <alloca.h> #endif

Thanks!

[fireflystorm]

@philippdonabauer thanks for the workaround. It worked for me.

I will just post some step-by-step instructions to make it easier for anyone else to get this going.

Installing ethash on Windows:

1. Clone the project from github
2. Open \src\libethash\mmap_win32.c for editing
3. Add the following after the last #include statement
   #pragma comment(lib, "Shell32.lib")
4. Open \src\python\core.c
5. Replace:
   #include <alloca.h>
   with:
   #if defined(_WIN32) || defined(WIN32)
   #include <malloc.h>
   #else
   #include <alloca.h>
   #endif
6. Run the following in the source code main folder
   setup.py install

This should successsfully install ethash under Windows.

[f-lub]

thanks for the workaround, it enabled me to continue to build microraiden on windows 10. Any good method to quickly check if ethash works correctly using this workaoround?

[guylando]

Those who get "Unable to find vcvarsall.bat" error when running "setup.py install" from instructions above, run this:

python.exe -u -c "import setuptools, tokenize;__file__='C:\\test\\ethash\\setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --compile

where python.exe is python 3 and ethash is in c:\test or otherwise modify the path in this code

[smitpancholi]

@philippdonabauer thanks for the workaround. It worked for me.

I will just post some step-by-step instructions to make it easier for anyone else to get this going.

Installing ethash on Windows:

1. Clone the project from github

2. Open \src\libethash\mmap_win32.c for editing

3. Add the following after the last #include statement
   #pragma comment(lib, "Shell32.lib")

4. Open \src\python\core.c

5. Replace:
   #include <alloca.h>
   with:
   #if defined(_WIN32) || defined(WIN32)
   #include <malloc.h>
   #else
   #include <alloca.h>
   #endif

6. Run the following in the source code main folder
   setup.py install

This should successsfully install ethash under Windows.

Thanks, it worked for me but i am finding it difficult to solve another problem.
I am trying to install nucypher with pip in virtual env
--> pip install nucypher
it shows me this error :
ERROR: Failed building wheel for pyethash
Running setup.py clean for pyethash
Failed to build pyethash
Installing collected packages: pyethash, py-evm, nucypher
Found existing installation: pyethash 0.1.23
ERROR: Cannot uninstall 'pyethash'. It is a distutils installed project and thus we cannot accurately determine which files belong to it which would lead to only a partial uninstall.

Thanks in advanced.

[Ita97]

@philippdonabauer thanks for the workaround. It worked for me.

I will just post some step-by-step instructions to make it easier for anyone else to get this going.

Installing ethash on Windows:

1. Clone the project from github
2. Open \src\libethash\mmap_win32.c for editing
3. Add the following after the last #include statement
   #pragma comment(lib, "Shell32.lib")
4. Open \src\python\core.c
5. Replace:
   #include <alloca.h>
   with:
   #if defined(_WIN32) || defined(WIN32)
   #include <malloc.h>
   #else
   #include <alloca.h>
   #endif
6. Run the following in the source code main folder
   setup.py install

This should successsfully install ethash under Windows.

I have followed the instruction and reload the PC. The error, by the way, is still there.
Other ideas?

---

Building wheels for collected packages: pyethash
Building wheel for pyethash (setup.py) ... error
ERROR: Command errored out with exit status 1:
command: 'c:\users\loren\appdata\local\programs\python\python38-32\python.exe' -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'C:\Users\loren\AppData\Local\Temp\pip-install-2gbzmvho\pyethash\setup.py'"'"'; file='"'"'C:\Users\loren\AppData\Local\Temp\pip-install-2gbzmvho\pyethash\setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(file);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, file, '"'"'exec'"'"'))' bdist_wheel -d 'C:\Users\loren\AppData\Local\Temp\pip-wheel-6sm_foop'
cwd: C:\Users\loren\AppData\Local\Temp\pip-install-2gbzmvho\pyethash
Complete output (46 lines):
running bdist_wheel
running build
running build_ext
building 'pyethash' extension
creating build
creating build\temp.win32-3.8
creating build\temp.win32-3.8\Release
creating build\temp.win32-3.8\Release\src
creating build\temp.win32-3.8\Release\src\python
creating build\temp.win32-3.8\Release\src\libethash
C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\VC\Tools\MSVC\14.25.28610\bin\HostX86\x86\cl.exe /c /nologo /Ox /W3 /GL /DNDEBUG /MD -Ic:\users\loren\appdata\local\programs\python\python38-32\include -Ic:\users\loren\appdata\local\programs\python\python38-32\include "-IC:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\VC\Tools\MSVC\14.25.28610\include" "-IC:\Program Files (x86)\Windows Kits\NETFXSDK\4.6.1\include\um" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.18362.0\ucrt" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.18362.0\shared" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.18362.0\um" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.18362.0\winrt" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.18362.0\cppwinrt" /Tcsrc/python/core.c /Fobuild\temp.win32-3.8\Release\src/python/core.obj -Isrc/ -std=gnu99 -Wall
cl : warning della riga di comando D9002 : l'opzione sconosciuta '-std=gnu99' verr… ignorata
core.c
C:\Program Files (x86)\Windows Kits\10\include\10.0.18362.0\ucrt\corecrt_io.h(49): warning C4820: '_finddata32i64_t': '4' byte di spaziatura interna aggiunti dopo membro dati 'name'
C:\Program Files (x86)\Windows Kits\10\include\10.0.18362.0\ucrt\corecrt_io.h(54): warning C4820: '_finddata64i32_t': '4' byte di spaziatura interna aggiunti dopo membro dati 'attrib'
C:\Program Files (x86)\Windows Kits\10\include\10.0.18362.0\ucrt\corecrt_io.h(64): warning C4820: '__finddata64_t': '4' byte di spaziatura interna aggiunti dopo membro dati 'attrib'
C:\Program Files (x86)\Windows Kits\10\include\10.0.18362.0\ucrt\corecrt_io.h(69): warning C4820: '__finddata64_t': '4' byte di spaziatura interna aggiunti dopo membro dati 'name'
C:\Program Files (x86)\Windows Kits\10\include\10.0.18362.0\ucrt\time.h(36): warning C4820: '_timespec64': '4' byte di spaziatura interna aggiunti dopo membro dati 'tv_nsec'
C:\Program Files (x86)\Windows Kits\10\include\10.0.18362.0\ucrt\time.h(43): warning C4820: 'timespec': '4' byte di spaziatura interna aggiunti dopo membro dati 'tv_nsec'
c:\users\loren\appdata\local\programs\python\python38-32\include\pytime.h(123): warning C4115: 'timeval': definizione di tipo denominato tra parentesi
c:\users\loren\appdata\local\programs\python\python38-32\include\pytime.h(188): warning C4820: '': '4' byte di spaziatura interna aggiunti dopo membro dati 'adjustable'
c:\users\loren\appdata\local\programs\python\python38-32\include\bytesobject.h(41): warning C4820: '': '3' byte di spaziatura interna aggiunti dopo membro dati 'ob_sval'
c:\users\loren\appdata\local\programs\python\python38-32\include\cpython/unicodeobject.h(625): warning C4820: '': '2' byte di spaziatura interna aggiunti dopo membro dati 'readonly'
c:\users\loren\appdata\local\programs\python\python38-32\include\longintrepr.h(88): warning C4820: '_longobject': '2' byte di spaziatura interna aggiunti dopo membro dati 'ob_digit'
c:\users\loren\appdata\local\programs\python\python38-32\include\cpython/dictobject.h(22): warning C4820: '': '4' byte di spaziatura interna aggiunti dopo membro dati 'ma_used'
c:\users\loren\appdata\local\programs\python\python38-32\include\cpython/pystate.h(64): warning C4820: '_ts': '2' byte di spaziatura interna aggiunti dopo membro dati 'recursion_critical'
c:\users\loren\appdata\local\programs\python\python38-32\include\cpython/pystate.h(133): warning C4820: '_ts': '4' byte di spaziatura interna aggiunti dopo membro dati 'context'
c:\users\loren\appdata\local\programs\python\python38-32\include\genobject.h(35): warning C4820: '': '3' byte di spaziatura interna aggiunti dopo membro dati 'gi_running'
c:\users\loren\appdata\local\programs\python\python38-32\include\genobject.h(55): warning C4820: '': '3' byte di spaziatura interna aggiunti dopo membro dati 'cr_running'
c:\users\loren\appdata\local\programs\python\python38-32\include\genobject.h(72): warning C4820: '': '3' byte di spaziatura interna aggiunti dopo membro dati 'ag_running'
c:\users\loren\appdata\local\programs\python\python38-32\include\cpython/pyerrors.h(19): warning C4820: '': '3' byte di spaziatura interna aggiunti dopo membro dati 'suppress_context'
c:\users\loren\appdata\local\programs\python\python38-32\include\cpython/pyerrors.h(23): warning C4820: '': '3' byte di spaziatura interna aggiunti dopo membro dati 'suppress_context'
c:\users\loren\appdata\local\programs\python\python38-32\include\cpython/pyerrors.h(33): warning C4820: '': '3' byte di spaziatura interna aggiunti dopo membro dati 'suppress_context'
c:\users\loren\appdata\local\programs\python\python38-32\include\cpython/pyerrors.h(40): warning C4820: '': '3' byte di spaziatura interna aggiunti dopo membro dati 'suppress_context'
c:\users\loren\appdata\local\programs\python\python38-32\include\cpython/pyerrors.h(49): warning C4820: '': '3' byte di spaziatura interna aggiunti dopo membro dati 'suppress_context'
c:\users\loren\appdata\local\programs\python\python38-32\include\cpython/pyerrors.h(54): warning C4820: '': '3' byte di spaziatura interna aggiunti dopo membro dati 'suppress_context'
c:\users\loren\appdata\local\programs\python\python38-32\include\cpython/pyerrors.h(66): warning C4820: '': '3' byte di spaziatura interna aggiunti dopo membro dati 'suppress_context'
c:\users\loren\appdata\local\programs\python\python38-32\include\code.h(69): warning C4820: '': '3' byte di spaziatura interna aggiunti dopo membro dati 'co_opcache_size'
c:\users\loren\appdata\local\programs\python\python38-32\include\fileutils.h(73): warning C4820: '_Py_stat_struct': '4' byte di spaziatura interna aggiunti dopo membro dati 'st_dev'
c:\users\loren\appdata\local\programs\python\python38-32\include\fileutils.h(75): warning C4820: '_Py_stat_struct': '2' byte di spaziatura interna aggiunti dopo membro dati 'st_mode'
c:\users\loren\appdata\local\programs\python\python38-32\include\fileutils.h(79): warning C4820: '_Py_stat_struct': '4' byte di spaziatura interna aggiunti dopo membro dati 'st_rdev'
c:\users\loren\appdata\local\programs\python\python38-32\include\fileutils.h(82): warning C4820: '_Py_stat_struct': '4' byte di spaziatura interna aggiunti dopo membro dati 'st_atime_nsec'
c:\users\loren\appdata\local\programs\python\python38-32\include\fileutils.h(84): warning C4820: '_Py_stat_struct': '4' byte di spaziatura interna aggiunti dopo membro dati 'st_mtime_nsec'
c:\users\loren\appdata\local\programs\python\python38-32\include\fileutils.h(88): warning C4820: '_Py_stat_struct': '4' byte di spaziatura interna aggiunti dopo membro dati 'st_reparse_tag'
src/python/core.c(2): fatal error C1083: Non Š possibile aprire il file inclusione: 'alloca.h': No such file or directory
error: command 'C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\VC\Tools\MSVC\14.25.28610\bin\HostX86\x86\cl.exe' failed with exit status 2

ERROR: Failed building wheel for pyethash
Running setup.py clean for pyethash
Failed to build pyethash
Installing collected packages: pyethash, ethereum, eth-hash
Attempting uninstall: pyethash
Found existing installation: pyethash 0.1.23
ERROR: Cannot uninstall 'pyethash'. It is a distutils installed project and thus we cannot accurately determine which files belong to it which would lead to only a partial uninstall.

[code-war1]

Instead of : "w3[tester]"
Usse: from web3 import EthereumTesterProvider
Then you can initialise an instance with it.

[philippdonabauer]

Hy im sorry im not sure that any of the workarounds will work now.. I created this ticket 6 Years ago ;)