Re: [Xen-devel] [PATCH] pass $($*.o-cflags) first to gcc/g++

[Paolo Bonzini <pbonzini@xxxxxxxxxx>]

Il 09/07/2014 22:34, Stefano Stabellini ha scritto:
> rules.mak adds cflags specific to the target source file ($($@-cflags))
> for last on the compiler command line.
>
> As a consequence when compiling arm-a64.o, g++ might end up picking the
> wrong utils.h header file, because it looks for utils.h on all the other
> include paths first.
>
> Fix the issue by passing the source file specific cflags first.
> Do it consisently for *.c, *.cc, etc.
>
> Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
You can just as well have a bug that requires you to put the option last 
(for example adding -Wno-something or -O0), which is why 
$($@-cflags)/$($*.o-cflags) comes last.
What package is it that has the conflicting utils.h file?  Any chance to 
get it fixed in your distro?  Here I get:
$ find /usr/include/ -name utils.h
/usr/include/libnl3/netlink/utils.h
/usr/include/libnl3/netlink/cli/utils.h
/usr/include/id3/utils.h
/usr/include/octave-3.6.4/octave/utils.h

but none of them have the path in -I.

Paolo

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