Hi Tully,

Thank you for your answer.

I think the reference to `ccache` in that folder name is because `ccache` is being used by default in the environment. I checked console output for two other ROS packages and they both have this line in their CMake output:

-- Check for working C compiler: /usr/lib/ccache/gcc
-- Check for working C compiler: /usr/lib/ccache/gcc -- works

For example:

[actionlib] http://jenkins.ros.org/job/devel-hydro-actionlib/ARCH_PARAM=amd64,UBUNTU_PARAM=precise,label=devel/lastBuild/console
[convex_decomposition] http://jenkins.ros.org/job/devel-hydro-convex_decomposition/ARCH_PARAM=amd64,UBUNTU_PARAM=precise,label=devel/16/console

Exactly similar thing happens in the full console of the problematic package: http://jenkins.ros.org/job/ros-hydro-ardrone-autonomy_binarydeb_precise_amd64/2/consoleFull

I guess `pbuilder` is integrating `ccache` by default: https://wiki.ubuntu.com/PbuilderHowto#Integration_with_ccache

- Mani

Mani Monajjemi

On Fri, Feb 21, 2014 at 11:23 AM, Tully Foote <tfoote@osrfoundation.org> wrote:

From your build output I see the following reference to ccache in the target architecture. I think that's probably where you want to look. 

    Building architecture x86_64 <Output in /tmp/buildd/ros-hydro-ardrone-autonomy-1.3.1-0precise-20140219-2242/obj-x86_64-linux-gnu/ardrone/src/ardronelib/ARDroneLib/FFMPEG/ffmpeg/../../Soft/Build/targets_versions//ffmpeg_x86_64_PROD_MODE_Linux_3.5.0-46-generic_GNU_Linux_usrlibccachegcc_4.6.3>

Here: http://jenkins.ros.org/job/ros-hydro-ardrone-autonomy_binarydeb_precise_amd64/2/console

Tully

On Fri, Feb 21, 2014 at 10:28 AM, Mani Monajjemi <mani.monajjemi@gmail.com> wrote:

Hi Martin,

Thank you for your answer. `ccache` seems to be the default compiler front-end on the build server. There is no reference to `ccache` in any of Makefiles.

You are right `ar` is in `binutils` and `binutils` seems to be installed on the server (my prev. email). However `ar` seems not to be in the PATH or there might be a bad symlink to it.

- Mani

Mani Monajjemi

On Fri, Feb 21, 2014 at 2:43 AM, Martin Günther <mguenthe@uos.de> wrote:

Hi Mani,

On Thu, 20 Feb 2014 18:21:14 -0800
Mani Monajjemi <mani.monajjemi@gmail.com> wrote:

> [...]

> `ar` is in `binutils` Ubuntu package

> [...]

>
> However, `ar` is still not found:
>
> /usr/lib/ccache/ar: Command not found

`/usr/bin/ar` is in the binutils package, `/usr/lib/ccache/ar` is in no
Debian package. (Also, installing ccache didn't set up that
symlink on my machine). There's probably a problem in your makefiles;
you shouldn't assume ccache is installed.

Cheers,
Martin

--
Dipl.-Inf. Martin Günther
Universität Osnabrück
Institut für Informatik
Albrechtstr. 28  (Raum 31/503)
D-49076 Osnabrück

Fon: 0541 969 2434
http://www.inf.uos.de/mguenthe/

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