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It downloaded fine, but when when it runs setup.py I get the following traceback:

Downloading/unpacking pycurl
  Running setup.py egg_info for package pycurl
    Traceback (most recent call last):
      File "<string>", line 16, in <module>
      File "/tmp/pip-build-root/pycurl/setup.py", line 563, in <module>
        ext = get_extension()
      File "/tmp/pip-build-root/pycurl/setup.py", line 368, in get_extension
        ext_config = ExtensionConfiguration()
      File "/tmp/pip-build-root/pycurl/setup.py", line 65, in __init__
        self.configure()
      File "/tmp/pip-build-root/pycurl/setup.py", line 100, in configure_unix
        raise ConfigurationError(msg)
    __main__.ConfigurationError: Could not run curl-config: [Errno 2] No such file or directory
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):
  File "<string>", line 16, in <module>
  File "/tmp/pip-build-root/pycurl/setup.py", line 563, in <module>
    ext = get_extension()
  File "/tmp/pip-build-root/pycurl/setup.py", line 368, in get_extension
    ext_config = ExtensionConfiguration()
  File "/tmp/pip-build-root/pycurl/setup.py", line 65, in __init__
    self.configure()
  File "/tmp/pip-build-root/pycurl/setup.py", line 100, in configure_unix
    raise ConfigurationError(msg)
__main__.ConfigurationError: Could not run curl-config: [Errno 2] No such file or directory
Any idea why this is happening and how to get around it 
                Thanks, I needed the libssl-dev package in addition to yours. Strange how pip decouples from system package management but doesn't even give hints about which package it could be I'm missing on a very common linux distribution.
– Mitja
                May 25, 2016 at 19:15
                I need both libcurl4-openssl-dev and libssl-dev on Debian 9: sudo apt-get install libcurl4-openssl-dev libssl-dev
– david euler
                Mar 27, 2018 at 12:44
                In my case python-devel was missing as well, so the following solved the issue for me: yum install libcurl-devel python-devel
– sokhaty
                Dec 2, 2017 at 5:05
                Yup. Just apt install   libcurl4-openssl-dev   on an Ubuntu 20.04 system. (nowhere else mentioned for this OS distro)
– Marcos
                May 28, 2022 at 2:02
in my case this fixed the problem:
sudo apt-get install libssl-dev libcurl4-openssl-dev python-dev
as explained here
                thanks for the python-dev package! i had this error without it : src/pycurl.h:4:20: fatal error: Python.h: No such file or directory
– Skullone
                Apr 1, 2019 at 14:14
                A better link would be stackoverflow.com/a/31002176/733092, which explains that these are libraries of C headers needed to build C Python extensions on Linux.
– Noumenon
                Apr 26, 2022 at 8:33
Same solution provided by @Michael Rice works for Ubuntu 18.04 as well
Ubuntu 18.04 LTS
sudo apt install libcurl4-openssl-dev libssl-dev
Al thought it is mentioned in comments of Michael's answer but thought highlight for easy of use.
I encountered the same problem whilst trying to get Shinken 2.0.3 to fire up on Ubuntu. Eventually I did a full uninstall then reinstalled Shinken with pip -v. As it cleaned up, it mentioned:
  
Warning: missing python-pycurl lib, you MUST install it before launch the shinken daemons
Installed that with apt-get, and all the brokers fired up as expected :-)
If the following solution giving you an error while installing them,
sudo apt install libcurl4-openssl-dev libssl-dev
then try to update your Linux os first with:
sudo apt update
I had this issue on Mac and it was related to the openssl package being an older version of what it was required by pycurl. pycurl can use other ssl libraries rather than openssl as per my understanding of it. Verify which ssl library you're using and update as it is very likely to fix the issue.
I fixed this by:
running brew upgrade
downloaded the latest pycurl-x.y.z.tar.gz from
http://pycurl.io/
extracted the package above and change directory into it
ran python setup.py --with-openssl install as openssl is the library I have installed. If you're ssl library is either gnutls or nss then will have to use --with-gnutls or --with-nss accordingly. You'll be able to find more installation info in their github repository.
Be advised that if you're using nodejs there's (at the time of writing) a dependency on libssl 1.0.* - so installing an alternative SSL library will break your nodejs installation.
An alternative solution to installing a different SSL library is that posted in this answer here: https://stackoverflow.com/a/59927568/13564342 to instead install libcurl4-gnutls-dev
sudo apt install libcurl4-gnutls-dev
        
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