gcc-4.2 error when using pip in virtualenv on OSX 10.7

Question

I am trying to install psycopg2 in virtualenv enviroment and am having a heck of a time. I think I may have screwed something up because I installed virtualenv and then upgraded to Xcode 4.

(my_enviroment)my_users-macbook-2:my_enviroment my_user$ pip install psycopg2

Produces this message:

Downloading/unpacking psycopg2==2.4.2
  Running setup.py egg_info for package psycopg2

    no previously-included directories found matching 'doc/src/_build'
Installing collected packages: psycopg2
  Running setup.py install for psycopg2
    building 'psycopg2._psycopg' extension
    gcc-4.2 -fno-strict-aliasing -fno-common -dynamic -isysroot /Developer/SDKs/MacOSX10.6.sdk -arch i386 -arch x86_64 -g -O2 -DNDEBUG -g -O3 -DPSYCOPG_DEFAULT_PYDATETIME=1 -DPSYCOPG_VERSION="2.4.2 (dt dec pq3 ext)" -DPG_VERSION_HEX=0x090004 -DPSYCOPG_EXTENSIONS=1 -DPSYCOPG_NEW_BOOLEAN=1 -DHAVE_PQFREEMEM=1 -I/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -I. -I/usr/include -I/usr/include/postgresql/server -c psycopg/psycopgmodule.c -o build/temp.macosx-10.6-intel-2.7/psycopg/psycopgmodule.o
    unable to execute gcc-4.2: No such file or directory
    error: command 'gcc-4.2' failed with exit status 1
    Complete output from command /Users/my_user/my_enviroment/bin/python -c "import setuptools;__file__='/Users/my_user/my_enviroment/build/psycopg2/setup.py';exec(compile(open(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --single-version-externally-managed --record /var/folders/b8/jflj9btd4rzb80xfmcy_rk140000gn/T/pip-lojVKc-record/install-record.txt --install-headers /Users/my_user/my_enviroment/bin/../include/site/python2.7:
    running install

running build

running build_py

running build_ext

building 'psycopg2._psycopg' extension

gcc-4.2 -fno-strict-aliasing -fno-common -dynamic -isysroot /Developer/SDKs/MacOSX10.6.sdk -arch i386 -arch x86_64 -g -O2 -DNDEBUG -g -O3 -DPSYCOPG_DEFAULT_PYDATETIME=1 -DPSYCOPG_VERSION="2.4.2 (dt dec pq3 ext)" -DPG_VERSION_HEX=0x090004 -DPSYCOPG_EXTENSIONS=1 -DPSYCOPG_NEW_BOOLEAN=1 -DHAVE_PQFREEMEM=1 -I/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -I. -I/usr/include -I/usr/include/postgresql/server -c psycopg/psycopgmodule.c -o build/temp.macosx-10.6-intel-2.7/psycopg/psycopgmodule.o

unable to execute gcc-4.2: No such file or directory

error: command 'gcc-4.2' failed with exit status 1

----------------------------------------
Command /Users/my_user/my_enviroment/bin/python -c "import setuptools;__file__='/Users/my_user/my_enviroment/build/psycopg2/setup.py';exec(compile(open(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --single-version-externally-managed --record /var/folders/b8/jflj9btd4rzb80xfmcy_rk140000gn/T/pip-lojVKc-record/install-record.txt --install-headers /Users/my_user/my_enviroment/bin/../include/site/python2.7 failed with error code 1
Storing complete log in /Users/my_user/.pip/pip.log

I am running OSX 10.7, Python 2.7.2, pip 1.0.2, Xcode 4.

I have tried the following solutions, with no success:

Cannot install psycopg2 on OSX 10.6.7 with XCode4

GCC error: command 'gcc-4.0' failed with exit status 1

Any thoughts? What other information would you need to know?

ohmi · Answer 1 · 2011-12-08T18:32:31.910

Same problem. Lion, latest xcode.

I downloaded and installed a fresh 2.7.2 python and a single virtualenv.

$ which pip
/opt/local/py_env/default/bin/pip
(default)default $ python
Python 2.7.2 (v2.7.2:8527427914a2, Jun 11 2011, 15:22:34) 
[GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> quit()
(default)default $ which python
/opt/local/py_env/default/bin/python

I added:

export CC=/usr/bin/gcc

based on the many answers here about why pip/easy_install, etc. are having trouble with Lion. That solved the compiling issue, but it fails with the same error on the link step:

    /usr/bin/gcc -fno-strict-aliasing -fno-common -dynamic -isysroot /DeveloperSDKs/MacOSX10.6.sdk -g -O2 -DNDEBUG -g -O3 -arch i386 -arch x86_64 PSYCOPG_DEFAULT_PYDATETIME=1 -DPSYCOPG_VERSION="2.4.2 (dt dec pq3 ext)" -DPG_VERSION_HEX=0x080401 -DPSYCOPG_EXTENSIONS=1 -DPSYCOPG_NEW_BOOLEAN=1 -DHAVE_PQFREEMEM=1 -I/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -I. -I/Library/PostgreSQL/8.4/include -I/Library/PostgreSQL/8.4/include/postgresql/server -c psycopg/typecast.c -o build/temp.macosx-10.6-intel-2.7/psycopg/typecast.o

gcc-4.2 -bundle -undefined dynamic_lookup -isysroot /Developer/SDKs/MacOSX10.6.sdk -isysroot /Developer/SDKs/MacOSX10.6.sdk -g -arch i386 -arch x86_64 build/temp.macosx-10.6-intel-2.7/psycopg/psycopgmodule.o build/temp.macosx-10.6-intel-2.7/psycopg/green.o build/temp.macosx-10.6-intel-2.7/psycopg/pqpath.o build/temp.macosx-10.6-intel-2.7/psycopg/utils.o build/temp.macosx-10.6-intel-2.7/psycopg/bytes_format.o build/temp.macosx-10.6-intel-2.7/psycopg/connection_int.o build/temp.macosx-10.6-intel-2.7/psycopg/connection_type.o build/temp.macosx-10.6-intel-2.7/psycopg/cursor_int.o build/temp.macosx-10.6-intel-2.7/psycopg/cursor_type.o build/temp.macosx-10.6-intel-2.7/psycopg/lobject_int.o build/temp.macosx-10.6-intel-2.7/psycopg/lobject_type.o build/temp.macosx-10.6-intel-2.7/psycopg/notify_type.o build/temp.macosx-10.6-intel-2.7/psycopg/xid_type.o build/temp.macosx-10.6-intel-2.7/psycopg/adapter_asis.o build/temp.macosx-10.6-intel-2.7/psycopg/adapter_binary.o build/temp.macosx-10.6-intel-2.7/psycopg/adapter_datetime.o build/temp.macosx-10.6-intel-2.7/psycopg/adapter_list.o build/temp.macosx-10.6-intel-2.7/psycopg/adapter_pboolean.o build/temp.macosx-10.6-intel-2.7/psycopg/adapter_pdecimal.o build/temp.macosx-10.6-intel-2.7/psycopg/adapter_pint.o build/temp.macosx-10.6-intel-2.7/psycopg/adapter_pfloat.o build/temp.macosx-10.6-intel-2.7/psycopg/adapter_qstring.o build/temp.macosx-10.6-intel-2.7/psycopg/microprotocols.o build/temp.macosx-10.6-intel-2.7/psycopg/microprotocols_proto.o build/temp.macosx-10.6-intel-2.7/psycopg/typecast.o -L/Library/PostgreSQL/8.4/lib -lpq -lssl -lcrypto -o build/lib.macosx-10.6-intel-2.7/psycopg2/_psycopg.so

unable to execute gcc-4.2: No such file or directory

1) I thought that by installing my own Python 2.7.2 that I'd get around the need to use the CC trick because I installed my python fresh. Why not?

2) Is there a similar trick for the name of the linker? This might be getting pretty deep into distutils.

EDIT: RESOLVED Following many blog/SO suggestions the following worked for me: Recall I am using virtualenv running python 2.7.2 0) added symlink to /bin: ln -s /usr/bin/gcc gcc-4.2 1) Installed latest Postgres. I upgraded from 8.4 to 9.1. Did not uninstall 8.4, did not lose my databases. 2) added /Library/PostgreSQL/9.1/bin to $PATH. I did this in my .profile because I already had 8.4/bin in there, probably for much the same reason. 3) pip install psycopg2

I still am not sure why I need the symlink in this situation. Perhaps because I did not build 2.7.2 from source.

However, my django/postgres apps all work. The symlink lets me install other packages that also reference gcc-4.2 in my virtualenv.

Thanks!!! Your a life saver. I tried everything and then finally added the ln -s /usr/bin/gcc gcc-4.2 and it worked!!! — sweyrick, Aug 22 '12 at 22:13
Oddly enough, still fixes my problem 4 years later on El Capitan. Thanks! — jbodily, May 23 '16 at 22:46

score 5 · Answer 2 · answered Oct 31 '11 at 01:33

5

Your error is this:

unable to execute gcc-4.2: No such file or directory

Which means that gcc-4.2 is not installed.

Either downgrade (or upgrade) your GCC version, or modify the package to build with just the gcc command.

A bit more hacky would be to ln gcc-4.2 to the gcc command.

answered Oct 31 '11 at 01:33

Blender

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So, gcc-4.2 seems to be installed. Or at least it exists in the /Developer directory. But it is definately not at this location: `/Developer/SDKs/MacOSX10.6.sdk` Could that be the source of the problem? – TrentonMcManus Oct 31 '11 at 03:44
This may shed more light on the issue: http://superuser.com/questions/313107/does-updating-to-os-x-lion-delete-gcc/313362#313362 – TrentonMcManus Oct 31 '11 at 03:59
Eh, I don't even run Mac, so that would by first stab at it. Did you get the problem solved? – Blender Oct 31 '11 at 04:44
Nope. I tried reinstalling Xcode 4, restarting the computer, and creating symlinks for gcc in the `/Developer/SDKs/MacOSX10.6.sdk` directory. All to no avail. – TrentonMcManus Oct 31 '11 at 05:28
1

What are you linking? You want `/usr/bin/gcc-4.2 -> Xcode GCC binary`. – Blender Oct 31 '11 at 05:41
As far as I know I was linking as you describe. I added /Developers/usr/bin to the $PATH for good measure and still getting the same error. I have given up on trying to fix this, and am going to try re-installing Xcode 3.2.6 – TrentonMcManus Oct 31 '11 at 06:49
Can you please run `which gcc` in Terminal? I'm not sure why this isn't working for you. – Blender Nov 03 '11 at 05:04
Comes back as `/Developer/usr/bin/gcc` – TrentonMcManus Nov 03 '11 at 19:13
Link it: `cd /usr/bin/ && sudo ln -s /Developer/usr/bin/gcc gcc-4.2` and see what happens. – Blender Nov 03 '11 at 19:15
I get this result `ln: gcc-4.2: File exists` – TrentonMcManus Nov 04 '11 at 14:10
1

Ok, so that means `gcc-4.2` has been linked already. Is `/usr/bin/` in your `$PATH` variable? Try adding it and then run the compile script (while in the same Terminal window): `export PATH=$PATH:/usr/bin/` – Blender Nov 04 '11 at 15:40
Thank you so much for your help, by the way. I really appreciate it. So here is the update. I have reinstalled OSX. I have installed fresh coppies of Python 2.7.2, easy_install, pip and virtualenv. I have also installed Xcode 4. I tried doing `cd /usr/bin/ && sudo ln -s /Developer/usr/bin/gcc gcc-4.2`. When I tried that command, no error resulted. When I do `which gcc` now it returns `/usr/bin/gcc`. I tried installing psycopg2 again, and ended up with the same error messages: `error: command 'gcc-4.2' failed with exit status 1`. – TrentonMcManus Nov 05 '11 at 19:28
Could you post the latest error message dump? I think the errors should be different now. – Blender Nov 05 '11 at 21:34
1

That's a lot better. I looked around, and you'll have to do a bunch of hardcore compiling to make things work. If you'd like to try something, try linking a few header files (that was your error). This question is exactly your problem: http://stackoverflow.com/questions/1550397/no-such-file-or-directory-for-the-files-stdarg-h-and-float-h/3139190#3139190 – Blender Nov 06 '11 at 21:08

score 4 · Answer 3 · answered Sep 26 '12 at 21:55

4

I've found the easiest way to install PIL on 10.7 is to create a symlink from gcc-4.2 to gcc.

sudo ln -s /usr/bin/gcc /usr/bin/gcc-4.2
easy_install pil

answered Sep 26 '12 at 21:55

eageranalyst

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It solved my problem. As my error was on g++-4.2, I just did "sudo ln -s /usr/bin/gcc /usr/bin/g++-4.2" and everything went perfect. Cheers niallsco! – marcelosalloum Aug 23 '13 at 05:23

score 1 · Answer 4 · answered Nov 12 '16 at 21:43

1

I was installing mysqlclient on OSX Sierra in venv w/ 2.7.7 and did the following:

xcode-select --install
export CC=gcc
export LDSHARED="gcc -Wl,-x -dynamiclib -undefined dynamic_lookup"
pip install mysqlclient

Seemed to work - the gcc-4.2 -bundle appears to come from setuptools build_ext somehow.

answered Nov 12 '16 at 21:43

NG.

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thanks. `export CC=gcc` did the trick for me in a similar case – captnswing May 09 '20 at 08:08

score -1 · Answer 5 · answered Sep 20 '13 at 20:51

-1

try this

$ sudo apt-get install python-dev

answered Sep 20 '13 at 20:51

temple

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gcc-4.2 error when using pip in virtualenv on OSX 10.7

5 Answers5

Linked