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Re: Help needed with include path precedence order


Hi Jonathan

Thanks very much for your reply.

> But this was found in a different path. One that doesn't look the same
> as the -I path you used (where did the "Hudson_" part come from?)

I'm sorry, that was my error on pasting into the email.

I changed the makefile variable that defines the Boost include path from:

BOOST_INC = $(OPEN_SOURCE_LIBS)/Boost/rel-1.69.0/

to:

BOOST_INC = $(OPEN_SOURCE_LIBS)/Boost/rel-1.69.0

(deleted final '/') and now the compilation is succeeding. I'm not
convinced that that was the reason, but I'm happy that the build is now
working.

Best regards

David


On Fri, Jan 25, 2019 at 12:44 PM Jonathan Wakely <jwakely.gcc@gmail.com>
wrote:

> On Fri, 25 Jan 2019 at 08:49, David Aldrich
> <david.aldrich.ntml@gmail.com> wrote:
> >
> > Hi
> >
> > I am using gcc 7.3.0 on Ubuntu 18.04 LTS to build an application that
> uses
> > the Boost libraries. I want to use  Boost 1.69, which I have installed on
> > another server. The Ubuntu machine has  Boost 1.65 installed.  I specify
> > the remote boost path (to 1.69) in my makefile and 'make' compiles my
> > source file with:
> >
> >
> >
> > g++ -c -Wall -m64 -I/net/simdata/OpenSourceLibs/Boost/rel-1.69.0/ -fpic
> -O3
> > SINRCalculation.cpp -o _gnuRelease/SINRCalculation.o
> >
> >
> >
> > Now, that source file uses boost/multi_array.hpp. The above compiler
> > command gives error:
> >
> >
> >
> > In file included from /usr/include/boost/multi_array.hpp:30:0,
>
> This was found in /usr/include
>
> >                  from SINRCalculation.cpp:25:
> >
> >
> /net/simdata/Hudson_OpenSourceLibs/Boost/rel-1.69.0/boost/type_traits.hpp:118:10:
>
> But this was found in a different path. One that doesn't look the same
> as the -I path you used (where did the "Hudson_" part come from?)
>
> So something is very messed up. Why is the old <boost/multi_array.hpp>
> being found in the first place? Is that header missing from your
> boost-1.69 installation?
>
>
> > fatal error: boost/type_traits/is_nothrow_swappable.hpp: No such file or
> > directory
> >
> >  #include <boost/type_traits/is_nothrow_swappable.hpp>
> >
> >           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> >
> > compilation terminated.
> >
> >
> >
> > Now, my copy of boost 1.69 does contain is_nothrow_swappable.hpp so, at
> > first sight, that error is surprising.
>
> Your copy in /net/simdata/OpenSourceLibs/Boost/rel-1.69.0/ or the one
> in /net/simdata/Hudson_OpenSourceLibs/Boost/rel-1.69.0/ which is being
> found?
> Are they the same?
>
> Compile with -save-temps and inspect the SINRCalculation.oii file to
> see which boost headers are found, in which locations. That should
> help figure out what's going on.
>
> >
> >
> > I think what is happening is the is_nothrow_swappable.hpp is being
> searched
> > for on the system library path (boost 1.65 does not have that file), not
> > the one I specified using -I.
>
> Seems unlikely, I think something else is happening.
>
> >
> >
> >
> > Is this possible?  If so, how can I force the compiler to use the boost
> > 1.69 path consistently for all paths?
>
> The -I option you used should already do that, which is why I think
> you have something messed up with your Boost installations.
>


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