[CMake] Why does ExternalProject require root access?

[Eric Noulard]

2013/1/20 Ansis Māliņš <ansis.malins at gmail.com>

> The line
> ExternalProject_Add(bullet PREFIX ${PROJECT_SOURCE_DIR})
> fails with
> Install the project...
> -- Install configuration: "Release"
> CMake Error at cmake_install.cmake:38 (FILE):
>   file cannot create directory: /usr/local/lib/pkgconfig.  Maybe need
>   administrative privileges.
>
> Why? How do I avoid needing root for building my project?
>

I don't really know but  your ExternalProject_Add( looks strange?

Do you really want to use **current** project source dir
(${PROJECT_SOURCE_DIR})
as the PREFIX of your external project?

I bet this is a mistake you usually use a separate prefix for **each**
external project
and probably use at least a subdirectory of the current "meta-project"

It looks like you somehow inherit the "default" CMAKE_INSTALL_PREFIX
from the current project  which happens to be "/usr/local", thus the
failure.



> What I'm trying to do: Build several projects (bullet, ogre, btogre, sdl,
> mygame) into one thing. ExternalProject seems like the correct way to do
> that.
>

Right, looks like a good idea, but you need to specify a proper prefix.

>
> Lubuntu Linux 12.04
> CMake 2.8.7
>
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-- 
Erk
Le gouvernement représentatif n'est pas la démocratie --
http://www.le-message.org
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