Re: [Starpu-devel] Weird error with HWLOC

[Samuel Thibault <samuel.thibault@inria.fr>]

Hello,

Hoque, Reazul, on mar. 04 avril 2017 21:57:37 +0000, wrote:
> echo $PKG_CONFIG
> /cm/shared/apps/hwloc/1.9.1/lib/pkgconfig/

pkg-config does not read a PKG_CONFIG variable, only PKG_CONFIG_PATH

> echo $PKG_CONFIG_PATH 
> /cm/shared/apps/hwloc/1.9.1/lib/pkgconfig/

Is this variable really exported? Check for instance

printenv | grep PKG_CONFIG_PATH

And does /cm/shared/apps/hwloc/1.9.1/lib/pkgconfig/ contain hwloc.pc?

> The help of the ./configure does not specify how we are supposed to point to
> the hwloc directory.

The help can not cover every bits of detail of configuration, it would
then be thousands of lines long.  It has to be a quick reminder only.

> How is a normal user supposed to know which env_variable
> to set?

Either the distribution or the module environment already provides the
correct environment variables (but it has to do so properly of course),
or the user uses --with-hwloc=... as you did, but again hwloc has to
have been installed properly of course.

> What is the actual problem here?

Apparently /cm/shared/apps/hwloc/1.9.1/lib/pkgconfig/ just does not
contain hwloc.pc, i.e. a problem in your system.

> I succeeded before with version 1.2.0.

Does it still work with 1.2.0 nowadays?
We have not changed the hwloc detection between 1.2.0 and the current
1.2 branch.

Samuel