Re: [Libmesh-devel] Overriding Compiler Options

[Roy S. <roy...@ic...>]

On Fri, 24 Jun 2011, Derek Gaston wrote:

> I'm thinking of changing lines in Make.common.in around 222 from:
>
> libmesh_CXXFLAGS += @CXXFLAGS_OPT@
>
> to
>
> libmesh_CXXFLAGS := @CXXFLAGS_OPT@ $libmesh_CXXFLAGS
>
> The reason is that the way it is setup now doesn't allow users to actually override the flags libMesh picks!  For instance on my particular system libMesh is picking -O2... but I have no way to override that because even if I put "-O3" into my environmental libmesh_CXXFLAGS the -O2 will appear _after_ it... overriding it!
>
> With the scheme outlined above any user flags coming from the environment would be after the libMesh flags allowing the user to override anything libMesh does by default.
>
> Any opinions on this?

I've noticed the same problem, but been a little too lazy to test the
solution and a little too responsible to commit the solution without
testing it.  This looks like a good idea to me.
---
Roy