Error: Command 'Gcc' Failed with Exit Status 1 While Installing Eventlet

python install zbar error: Setup script exited with error: command 'gcc' failed with exit status 1

from another post seemed irrelevant i figure out the solution

ImportError: No module named zbar on Linux Mint

however only zbar-tools not enough for the good result, i put in

sudo apt-get install zbar-

and press the TAB then found zbar-dbg, just for a try, it really worked.

sudo apt-get install zbar-tools zbar-dbg

it really struck me while gcc errors caused by zbar problem indeed.
maybe some inspire for the similar problem, so i put it here.

command 'gcc' failed with exit status 1 while installing cx_Oracle on windows 64 bit

Actually you're trying to download the binary of cx_Oracle, in the url you're refering to

http://prdownloads.sourceforge.net/cx-oracle/cx_Oracle-5.1.2-11g.win-amd64-py2.7.msi

the pointed file is a *.msi one which stands for Microsoft Installer and contains the pre-compiled stuff. So instead of using pip/easy_install to perform the setup of cx_Oracle, just double click on the msi file; that will install all the needed files (the .pyd and the .so one).

Error installing scrapy 0.22 (on Ubuntu 12.04): 'gcc' failed with exit status 1

Try with

sudo apt-get install libffi libffi-dev

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