Installing requirements.txt throws an error on Django

Question

The project was working perfectly until recently when I created a model for my database and tried to pip install requirement.txt. I have done everything I know including modifying my settings.py to add the missing library, reinstalling django and psycopg2, all to no avail. Here's my requirement.txt:

tweepy==3.8.0
django
gunicorn
django-heroku

The error i'm getting:

 ld: library not found for -lssl
    clang: error: linker command failed with exit code 1 (use -v to see invocation)
    error: command 'gcc' failed with exit status 1

    ----------------------------------------
Command "/Users/apple/Downloads/font_text/python-getting-started/getting-started/bin/python3 -u -c "import setuptools, tokenize;__file__='/private/var/folders/tn/843ff_ns4j5ddf0fyc998v6c0000gn/T/pip-install-phi9wroh/psycopg2/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record /private/var/folders/tn/843ff_ns4j5ddf0fyc998v6c0000gn/T/pip-record-sc3y24vo/install-record.txt --single-version-externally-managed --compile --install-headers /Users/apple/###/###/PROJECTFOLDER/getting-started/include/site/python3.7/psycopg2" failed with error code 1 in /private/var/folders/tn/843ff_ns4j5ddf0fyc998v6c0000gn/T/pip-install-phi9wroh/psycopg2/

https://stackoverflow.com/questions/11094718/error-command-gcc-failed-with-exit-status-1-while-installing-eventlet — Marin, Dec 09 '19 at 07:50

score 2 · Answer 1 · answered Dec 09 '19 at 08:05

2

Based on the error message, you need to install the openssl-devel package on your system.

answered Dec 09 '19 at 08:05

Melan

458
2
15

@DevMike01 probably libssl is not in your library path and need to set it manually – Melan Dec 09 '19 at 08:54

score 2 · Accepted Answer · answered Dec 09 '19 at 12:26

After long hours of searching and experimenting, I finally was able to solve the problem. But I'm still investigating on what really could have caused the error. Anyways, here's what fixed it

export LDFLAGS="-L/usr/local/opt/openssl/lib"
export CPPFLAGS="-I/usr/local/opt/openssl/include"
pip install psycopg2

I found it here: error installing psycopg2, library not found for -lssl

score 0 · Answer 3 · answered Dec 09 '19 at 08:23

0

You need to reinstall gcc , gcc-c++ and dependencies.

For python 2.7

$ sudo yum -y install gcc gcc-c++ kernel-devel
$ sudo yum -y install python-devel libxslt-devel libffi-devel openssl-devel
$ pip install "your python packet"

For python 3.4

$ sudo apt-get install python3-dev
$ pip install "your python packet"

Hope this will help.

answered Dec 09 '19 at 08:23

Sanket Sawardekar

59
1
4

http://initd.org/psycopg/docs/faq.html#problems-compiling-and-installing-psycopg2 – Sanket Sawardekar Dec 09 '19 at 08:44

Installing requirements.txt throws an error on Django

3 Answers3