sage-8.9 fails compilation in Ubuntu 18.04

asked 2019-10-01 03:03:25 +0100

dsejas
2833 ●16 ●55 ●101

updated 2020-01-12 14:01:54 +0100

FrédéricC

5311 ●4 ●44 ●118

Hello, Sage community!

I just downloaded the sage-8.9 source code. I tried to compile it with Python 3, but the process stops with an error when trying to install matplotlib. The problem seems to be related to the fact that the installer is looking for libpng12, which is no longer available at Ubuntu 18.04's repositories. I get the following error message:

REQUIRED DEPENDENCIES AND EXTENSIONS
                 numpy: yes [version 1.16.1]
      install_requires: yes [handled by setuptools]
                libagg: yes [pkg-config information for 'libagg' could not
                        be found. Using local copy.]
              freetype: yes [version 2.9.1]
                   png: no  [The C/C++ header for libpng (png.h) could not
                        be found.  You may need to install the development
                        package.]
                 qhull: yes [pkg-config information for 'libqhull' could not
                        be found. Using local copy.]

[SOME EXTRA USELESS INFO HERE AND THEN...]

    ============================================================================
                        * The following required packages can not be built:
                        * png
                        * Try installing png with `apt-get install
                        * libpng12-dev` and pkg-config with `apt-get install
                        * pkg-config`

Is there something I can do in the meanwhile?

Thanks in advance!

edit retag flag offensive close merge delete

add a comment

0

answered 2019-10-07 04:22:55 +0100

dsejas
2833 ●16 ●55 ●101

Hello, Sage community. I was able to solve this problem just by using sudo apt-get install python, which installs python and python2 as synonyms. As of John Palmieri's comment, this seems to just install a prerequisite for the compilation. Unfortunately, I haven't been able to determine what this dependency is.

edit flag offensive delete link

add a comment

1

answered 2019-10-01 07:59:41 +0100

eric_g
8469 ●10 ●62 ●168 https://luth.obspm.fr/...

On Ubuntu 18.04, you should install the Ubuntu package libpng16-16 prior to SageMath installation.

edit flag offensive delete link

Comments

Hello, @eric_g. Forseeing the compilation of SageMath, I already had installed libpng16-16. Even so, the compilation fails.

dsejas ( 2019-10-01 21:21:15 +0100 )edit

Maybe install libpng-dev in addition? That should contain the header file png.h which matplotlib is complaining about.

John Palmieri ( 2019-10-01 23:05:03 +0100 )edit

I've just compiled successfully Sage 8.9 (Python 3 version) from scratch on a Ubuntu 18.04 computer. The only png-related package installed on that computer is libpng16-16 (in particular, libpng-dev is not installed). So I am puzzled by your issue. If this might be helpful, here are the steps of what I've done:

git clone https://github.com/sagemath/sage.git
cd sage
make configure
./configure --with-python=3
MAKE="make -j16" make

eric_g ( 2019-10-04 17:34:09 +0100 )edit

Hello, @eric_g! Do you, by any chance, happened to have installed python and/or python2 before making make? I could solve my problem by installing those two packages previous to the compilation.

dsejas ( 2019-10-07 04:13:41 +0100 )edit

@dsejas Yes indeed the Ubuntu package python was installed on my computer prior to Sage build.

eric_g ( 2019-10-07 10:24:56 +0100 )edit

add a comment

0

answered 2019-10-01 05:39:28 +0100

John Palmieri

8876 ●19 ●73 ●192 http://www.math.washin...

Try ./sage -f libpng (to force installation of Sage's version of libpng) and then make.

edit flag offensive delete link

Comments

One question: I was using the following flow of commands to compile:

make configure
./configure --with-python=3
make build

Does your suggestion fit in this process? Where in the previous process should I use the command you suggest?

dsejas ( 2019-10-01 06:01:00 +0100 )edit

After the build has failed, execute ./sage -f libpng and then make (or make build, if you prefer).

John Palmieri ( 2019-10-01 06:25:13 +0100 )edit

Hello, @JohnPalmieri. I proceeded as you suggested, and I got stuck on the SciPy compilation. The problem seems to be that Openblas can't be found. I suppose that---extrapolating your suggestion---I can run ./sage -f openblas. However, this makes me wonder why I have those problems even if I have both libpng and openblas installed on my system.

dsejas ( 2019-10-01 21:25:28 +0100 )edit

Maybe you need the -dev versions of these packages, e.g. libopenblas-dev. Maybe Sage's method of detecting whether a package needs to be installed needs some work: maybe it's detecting openblas but it should be looking for libopenblas-dev.

John Palmieri ( 2019-10-01 23:06:47 +0100 )edit

Actually, Sage should be installing its own version of openblas regardless, it seems to me. Maybe the system version is interfering, and this might be remedied by installing the dev version.

John Palmieri ( 2019-10-01 23:17:47 +0100 )edit

see more comments

sage-8.9 fails compilation in Ubuntu 18.04

3 Answers

Comments

Comments

Your Answer

Question Tools

Stats

Related questions

sage-8.9 fails compilation in Ubuntu 18.04 edit

3 Answers

Comments

Comments

Your Answer

Question Tools

Stats

Related questions

sage-8.9 fails compilation in Ubuntu 18.04