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Josh Davis
24,227 PointsI'm trying to install flask-bcrypt on Mac but getting "error: command '/usr/bin/clang' failed with exit status 1"
I'm trying to install flask-bcrypt on my MacBook Pro (Retina, 15-inch, Mid 2014) running El Capitan (v10.11.1) via the following:
pip3 install flask-bcrypt
And it is producing the following error:
c/_cffi_backend.c:13:10: fatal error: 'ffi.h' file not found
#include <ffi.h>
^
1 error generated.
Note: will not use '__thread' in the C code
The above error message can be safely ignored
error: command '/usr/bin/clang' failed with exit status 1
Any ideas?
4 Answers
Josh Davis
24,227 PointsTo fix this error I found some help here: [http://stackoverflow.com/questions/22875270/error-installing-bcrypt-with-pip-on-os-x-cant-find-ffi-h-libffi-is-installed] Homebrew is needed to run the recommended scripts: [http://brew.sh/]
After that I ran easy_install flask-bcrypt while in my virtualenv and it has seemed to install! I'm sure pip install flask-bcrypt would work at that point too.
Chris Freeman
Treehouse Moderator 68,441 PointsI've been there! The key is to install py-bcrypt (instead of plain bcrypt) then install flask-bcrypt.
See post on How to Run Flask Locally for a complete list of pip install commands.
Here is an explicit flow of getting "python app.py" to run in a virtual env.
The flow below creates a fresh virtual environment. After each install I ran "python app.py" to see what was missing (not shown), I then installed just one module at a time until it all worked. I used "pip freeze" to display the currently installed modules at each step.
If you do not wish to use a (highly recommended) virtual env, you can skip the activate step.
# Create new virtual env using python 3.4
$ virtualenv -p /usr/bin/python3.4 venv3.4
# Activate new venv
$ . ./venv3.4/bin/activate
# check what is stalled
(venv3.4)s pip freeze
# Nothing installed, start with Flask
(venv3.4)s pip install Flask
(venv3.4)s pip freeze
Flask==0.10.1
Jinja2==2.8 # <-- new
MarkupSafe==0.23 # <-- new
Werkzeug==0.10.4 # <-- new
itsdangerous==0.24 # <-- new
# Install py-bcrypt
(venv3.4)s pip install py-bcrypt
(venv3.4)s pip freeze
Flask==0.10.1
Jinja2==2.8
MarkupSafe==0.23
Werkzeug==0.10.4
itsdangerous==0.24
py-bcrypt==0.4 # <-- new
# Install Flask-bcrypt
(venv3.4)s pip install Flask-bcrypt
(venv3.4)s pip freeze
Flask==0.10.1
Flask-Bcrypt==0.7.1 # <-- new
Jinja2==2.8
MarkupSafe==0.23
Werkzeug==0.10.4
bcrypt==2.0.0 # <-- new
cffi==1.3.0 # <-- new
itsdangerous==0.24
py-bcrypt==0.4
pycparser==2.14 # <-- new
six==1.10.0 # <-- new
# Install Flask-login
(venv3.4)s pip install Flask-login
(venv3.4)s pip freeze
Flask==0.10.1
Flask-Bcrypt==0.7.1
Flask-Login==0.3.2 # <-- new
Jinja2==2.8
MarkupSafe==0.23
Werkzeug==0.10.4
bcrypt==2.0.0
cffi==1.3.0
itsdangerous==0.24
py-bcrypt==0.4
pycparser==2.14
six==1.10.0
# Install Flask-WTF
(venv3.4)s pip install Flask-WTF
(venv3.4)s pip freeze
Flask==0.10.1
Flask-Bcrypt==0.7.1
Flask-Login==0.3.2
Flask-WTF==0.12 # <-- new
Jinja2==2.8
MarkupSafe==0.23
WTForms==2.0.2 # <-- new
Werkzeug==0.10.4
bcrypt==2.0.0
cffi==1.3.0
itsdangerous==0.24
py-bcrypt==0.4
pycparser==2.14
six==1.10.0
# Install peewee
(venv3.4)s pip install peewee
(venv3.4)s pip freeze
Flask==0.10.1
Flask-Bcrypt==0.7.1
Flask-Login==0.3.2
Flask-WTF==0.12
Jinja2==2.8
MarkupSafe==0.23
WTForms==2.0.2
Werkzeug==0.10.4
bcrypt==2.0.0
cffi==1.3.0
itsdangerous==0.24
peewee==2.6.4 # <-- new
py-bcrypt==0.4
pycparser==2.14
six==1.10.0
# Glory Time!
(venv3.4)s python app.py
* Running on http://0.0.0.0:8080/ (Press CTRL+C to quit)
* Restarting with stat
dierkpolzin
7,380 PointsI did just like you asked and got this error...
Failed building wheel for py-bcrypt Failed to build py-bcrypt Installing collected packages: py-bcrypt Running setup.py install for py-bcrypt Successfully installed py-bcrypt-0.4 (venv3.5)bash-3.2$ which pip /Users/dierkpol/venv3.5/bin/pip
Chris Freeman
Treehouse Moderator 68,441 PointsWhich shell or command window are you running these commands in? The ". ./venv3.4/bin/activate" works with bash shell.
try source ./venv3.4/bin/activate
Josh Davis
24,227 PointsChris, thank you for your response. I was having trouble getting virtualenv to work. I ended up using easy_install to get it to work properly. However, when continuing down your path, I still get hung up at pip install Flask-bcrypt. I was able to get py-bcrypt installed though.
I'm still getting the error: command '/usr/bin/clang' failed with exit status 1 error, even while in my activated virtualenv
dierkpolzin
7,380 PointsI changed from the tcsh to bash and activate worked...
I was able to get the "venv" to start up... i used pip.. to install flask successfully...
pip install Flask Collecting Flask Using cached Flask-0.10.1.tar.gz Collecting Werkzeug>=0.7 (from Flask) Downloading Werkzeug-0.11.2-py2.py3-none-any.whl (304kB) 100% |████████████████████████████████| 307kB 671kB/s Collecting Jinja2>=2.4 (from Flask) Using cached Jinja2-2.8-py2.py3-none-any.whl Collecting itsdangerous>=0.21 (from Flask) Using cached itsdangerous-0.24.tar.gz Collecting MarkupSafe (from Jinja2>=2.4->Flask) Using cached MarkupSafe-0.23.tar.gz Building wheels for collected packages: Flask, itsdangerous, MarkupSafe Running setup.py bdist_wheel for Flask Stored in directory: /Users/dierkpol/Library/Caches/pip/wheels/d2/db/61/cb9b80526b8f3ba89248ec0a29d6da1bb6013681c930fca987 Running setup.py bdist_wheel for itsdangerous Stored in directory: /Users/dierkpol/Library/Caches/pip/wheels/97/c0/b8/b37c320ff57e15f993ba0ac98013eee778920b4a7b3ebae3cf Running setup.py bdist_wheel for MarkupSafe Complete output from command /Users/dierkpol/venv3.5/bin/python3 -c "import setuptools;file='/private/var/folders/wc/61klhx9m8xj1b0001s6wbpmr0000gq/T/pip-build-58oqid9o/MarkupSafe/setup.py';exec(compile(open(file).read().replace('\r\n', '\n'), file, 'exec'))" bdist_wheel -d /var/folders/wc/61klhx9m8xj1b0001s6wbpmr0000gq/T/tmpo5iov7pwpip-wheel-: running bdist_wheel running build running build_py creating build creating build/lib.macosx-10.6-intel-3.5
but it does not finish
Failed building wheel for MarkupSafe Successfully built Flask itsdangerous Failed to build MarkupSafe
dierkpolzin
7,380 Pointscreating build/temp.macosx-10.6-intel-3.5/c /usr/bin/clang -fno-strict-aliasing -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -arch i386 -arch x86_64 -g -I/usr/include/ffi -I/usr/include/libffi -I/Library/Frameworks/Python.framework/Versions/3.5/include/python3.5m -c c/cffi_backend.c -o build/temp.macosx-10.6-intel-3.5/c/_cffi_backend.o c/_cffi_backend.c:13:10: fatal error: 'ffi.h' file not found #include <ffi.h> ^ 1 error generated. Note: will not use '_thread' in the C code The above error message can be safely ignored error: command '/usr/bin/clang' failed with exit status 1
Failed building wheel for cffi Failed to build bcrypt cffi Installing collected packages: cffi, six, bcrypt, Flask-bcrypt Running setup.py install for cffi Complete output from command /Users/dierkpol/venv3.5/bin/python3 -c "import setuptools, tokenize;file='/private/var/folders/wc/61klhx9m8xj1b0001s6wbpmr0000gq/T/pip-build-vckp3ely/cffi/setup.py';exec(compile(getattr(tokenize, 'open', open)(file).read().replace('\r\n', '\n'), file, 'exec'))" install --record /var/folders/wc/61klhx9m8xj1b0001s6wbpmr0000gq/T/pip-1luzuy4p-record/install-record.txt --single-version-externally-managed --compile --install-headers /Users/dierkpol/venv3.5/bin/../include/site/python3.5/cffi: configtest.c:1:1: error: thread-local storage is not supported for the current target __thread int some_threadlocal_variable_42; ^ 1 error generated. running install running build running build_py running build_ext building '_cffi_backend' extension /usr/bin/clang -fno-strict-aliasing -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -arch i386 -arch x86_64 -g -I/usr/include/ffi -I/usr/include/libffi -I/Library/Frameworks/Python.framework/Versions/3.5/include/python3.5m -c c/_cffi_backend.c -o build/temp.macosx-10.6-intel-3.5/c/_cffi_backend.o c/_cffi_backend.c:13:10: fatal error: 'ffi.h' file not found #include <ffi.h> ^ 1 error generated. Note: will not use '_thread' in the C code The above error message can be safely ignored error: command '/usr/bin/clang' failed with exit status 1
----------------------------------------
Command "/Users/dierkpol/venv3.5/bin/python3 -c "import setuptools, tokenize;file='/private/var/folders/wc/61klhx9m8xj1b0001s6wbpmr0000gq/T/pip-build-vckp3ely/cffi/setup.py';exec(compile(getattr(tokenize, 'open', open)(file).read().replace('\r\n', '\n'), file, 'exec'))" install --record /var/folders/wc/61klhx9m8xj1b0001s6wbpmr0000gq/T/pip-1luzuy4p-record/install-record.txt --single-version-externally-managed --compile --install-headers /Users/dierkpol/venv3.5/bin/../include/site/python3.5/cffi" failed with error code 1 in /private/var/folders/wc/61klhx9m8xj1b0001s6wbpmr0000gq/T/pip-build-vckp3ely/cffi
Josh Davis
24,227 PointsI'm getting the same error.
Farrah Dickerson
10,173 Points-I/usr/include/ffi -I/usr/include/libffi ...
Looks as if you're missing the ffi library, gents... I use Fedora, but perhaps we can find someone to translate: sudo dnf install libffi-devel OR sudo apt-get install libffi-dev OR sudo apt-get install libffi
Kurt Moseley
19,309 PointsThis worked for me (linux mint sudo apt-get install libffi-dev). Good call.
dierkpolzin
7,380 Pointsdierkpolzin
7,380 PointsI am pretty sure it worked for me too..
bash /* Installed HomeBrew */ ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
/* brew install pig-config libffi */ brew install pig-config libffi
/* activate vent */ source ./venv3.5/bin/activate
/* add pkg_config_path*/ export PKG_CONFIG_PATH=/usr/local/Cellar/libffi/3.0.13/lib/pkgconfig/
_configtest.c:1:1: error: thread-local storage is not supported for the current target __thread int some_threadlocal_variable_42; ^ 1 error generated.
Failed building wheel for crypt
Failed building wheel for cffi
pip install py-bcrypt
pip install Flask-bcrypt
pip install Flask-login
pip install Flask-WTF
pip install peewee