Fail to install ingition math

[osrf-migration]

Original report (archived issue) by Guanghua Zha (Bitbucket: sky99198).

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Follow this https://ignitionrobotics.org/api/math/6.1/install.html

Got: E: Unable to locate package libignition-math6-dev

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Tried to install ignition-math from source got:

Could not find a package configuration file provided by "ignition-cmake2"
(requested version 2.0.0) with any of the following names:

ignition-cmake2Config.cmake
ignition-cmake2-config.cmake

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Tried: sudo apt-get install libignition-cmake2-dev

Got: E: Unable to locate package libignition-cmake2-dev

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Installed Ignition CMake from source but did not resolve the problem above.

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What should I do?

Thanks!

[osrf-migration]

Original comment by Steve Peters (Bitbucket: Steven Peters, GitHub: scpeters).

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What operating system and architecture are you using (ie Ubuntu bionic amd64)?

[osrf-migration]

Original comment by Guanghua Zha (Bitbucket: sky99198).

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Ubuntu 16.04

[osrf-migration]

Original comment by Guanghua Zha (Bitbucket: sky99198).

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Ok I found the problem.

The Line 12 of the CMakeLists need to be updated as:

find_package(ignition-cmake3 3.0.0 REQUIRED)

[osrf-migration]

Original comment by Steve Peters (Bitbucket: Steven Peters, GitHub: scpeters).

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ign-cmake3 has not been released; it's only being used on the default branch of ign-cmake

I recommend using the ign-cmake2 branch of one of the tagged releases

[luccosta]

I had the same problem and install the binary for the ignition-cmake2 to solve the dependency worked for me. I used:

sudo apt install libignition-cmake2-dev

Maybe doesn't work for Guanghua Zha because of forget to apt update.

This is something that worth it to put on README.md?

[chapulina]

@luccosta , what Ignition Math binary were you trying to install and in which platform? ign-cmake2 should be installed automatically when you install ign-math, but there could be something broken for some specific platform.

[luccosta]

Used ign-math6 and Ubuntu 18.04.

I was trying to install from source with the README guide at the time. I used the following commands:

sudo apt-get install libeigen3-dev

git clone https://github.com/ignitionrobotics/ign-math

cd ign-math; mkdir build; cd build; cmake ..; make
sudo make install

I see that the actual README dont offer an source installation, the recommended source installation is the complete installation of Ignition?

[chapulina]

I see that the actual README dont offer an source installation

Good catch, the README is currently linking to https://ignitionrobotics.org/api/math/6.4/install.html, which doesn't have source install instructions.

Pull request #147 moved the source install instructions to the tutorial, but that targeted the master / main branch, which is not released yet, so the tutorials aren't live.

I'll backport that pull request to ign-math6.

[chapulina]

See #167