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CMake error: C++ 11 not supported on Mac high sierra

I was trying to install opencv for python using this link. After running the Cmake command, it exited with errors stating C++11 is not supported Although I have Xcode installed. I Also tried forcing Cmake to use C++ 11 using $ set(CMAKE_CXX_STANDARD 11) (because my Cmake version is 3.10.2), but I got this error:
syntax error near unexpected token `CMAKE_CXX_STANDARD'
Moreover, I tried installing gcc to check if my system supports the C++ 11 compiler through this link, where again I ran into terminal errors stating ./fixincludes: No such file or directory after running $ make install . What should I do?

Adrian has a more recent blog post on compiling OpenCV for the macOS. The instructions work both for 3.3.0 and 3.3.1.

First open python by python2 or python3 command in terminal after type import cv2 and everything is right now.

Could not import cufflinks

Problem
I am trying to install both plotly and cufflinks. However I had a problem.
The installation of both plotly and cufflinks were successful. Although, I can't import cufflinks.
Below is a picture of the problem. It seems to be a dependency error:
I tried manually downloading and installing "talib" but I keep getting failures. (Shown below).
talib\common.c(240): fatal error C1083: Cannot open include file: 'ta_libc.h': No such file or directory
error: command 'C:\\Program Files (x86)\\Microsoft Visual Studio 14.0\\VC\\BIN\\x86_amd64\\cl.exe' failed with exit status 2
Any Ideas? I tried re-installing both modules and Anaconda. Nothing So far.
Other infos:
Cufflinks version: 0.11.0
Plotly version: 2.0.10
Anaconda version: 3-4.4.0 (But I don't think it have anything to do with it)
Python version: 3.6.1

try installing this version of cufflinks, it eliminated the error for me.
pip install cufflinks==0.8.2

From this link: github.com/mrjbq7/ta-lib#troubleshooting
Troubleshooting
Sometimes installation will produce build errors like this:
func.c:256:28: fatal error: ta-lib/ta_libc.h: No such file or directory
compilation terminated.
This typically means that it can't find the underlying TA-Lib library, a dependency which needs to be installed. On Windows, this could be caused by installing the 32-bit binary distribution of the underlying TA-Lib library, but trying to use it with 64-bit Python.
Windows
Download ta-lib-0.4.0-msvc.zip and unzip to C:\ta-lib
This is a 32-bit release. If you want to use 64-bit Python, you will need to build a 64-bit version of the library.
My Fix
So, for windows, we need a 64-bit version of the library? Luckly I found a lot of modules built for 32 and 64 bits python:
http://www.lfd.uci.edu/~gohlke/pythonlibs/
search for "ta-lib" and click on the module you need (In my case cp36 64 bits).
Then, open the command prompt.
Change to where you downloaded the file: cd path/to/file
Type: pip install NameOfFile (in my case pip install TA_Lib‑0.4.10‑cp36‑cp36m‑win_amd64.whl )
Now the 64-bits Ta-Lib module should be installed in your machine. I tested the previous line of codes and it worked!
Thanks for the help :)

I have now removed all dependencies on talib. All studies are pure python based now and you should not face any of this errors.

rpy2 installation error on Windows 8 (Anaconda)

I have the latest Anaconda Python distribution installed on Windows 8 and I am attempting to install the rpy2 package. I initially ran into several issues that I was able to circumvent but I'm now stuck on one particular error that I'm pasting below.
The command
pip install rpy2
exits with the following error message:
In file included from .\rpy\rinterface\_rinterface.c:58:0:
.\rpy\rinterface\_rinterface.h:8:15: fatal error: R.h: No such file or
directory
compilation terminated.
error: command 'gcc' failed with exit status 1
Any suggestions? The path to R.h is included on my environment.

Dr. Gohlke's binary is probably the easiest solution. But you need to change the Python installation path in your registry for this method to work. The relevant key is in HKEY_LOCAL_MACHINE\SOFTWARE\Python\PythonCore\2.7\InstallPath. Change it so that the anaconda Python is the default python installation. You can always change it back if you want.

Pip install fuzzy fails because gcc fails to compile

I want to install fuzzy python package. I have windows 7 operating system with mingw32 and python 2.7. When I try to pip install the fuzzy package, I get the following error.
c:/mingw/bin/../lib/gcc/mingw32/4.8.1/../../../../mingw32/bin/ld.exe: build\temp.win-amd64-2.7\Release\src\fuzzy.o: bad reloc address 0x0 in section `.data'
collect2.exe: error: ld returned 1 exit status
error: command 'gcc' failed with exit status 1
Here's the complete log.
Please please help!

I had the same error when trying to install the (not part of anaconda) mmh3 module on an anaconda installation on windows.
It seems that your path includes an independent mingw installation (c:/mingw/bin/../lib/gcc/mingw32/4.8.1/../../../../mingw32/bin/ld.exe)
I had to remove my mingw from my path so that it used the MiniGW that corresponds to your Python, so try to check e.g. if
ld.exe -version
and
...\anaconda\MinGW\bin\ld.exe -version
give you the same, if not, make sure your path is correct as discussed above...

install lxml package. I am using python 2.7.5 in windows 7

i want to install lxml package. I am using python 2.7.5 in windows 7. I am using mingw compiler. After searching through the answers in stackoverflow and other sites, I removed the problem of "unable to find vcvarsall.bat". But now the problem which is coming is it is showing a fatal error: libxml/xmlversion.h: No such file or directory. And then it is showing an error: command 'gcc' failed with exit status 1

The best way to do this is to download it form this, website. It provides some unofficial binaries. Chose the right python version and install.