[ovs-dev] [PATCH 3/3] command-line: add ovs_cmdl_context

[Ben Pfaff]

On Tue, Mar 17, 2015 at 11:57:06AM -0400, Russell Bryant wrote:
> On 03/17/2015 11:49 AM, Ben Pfaff wrote:
> > On Tue, Mar 17, 2015 at 11:31:17AM -0400, Russell Bryant wrote:
> >> On 03/17/2015 11:11 AM, Ben Pfaff wrote:
> >> With just -Werror, I get:
> >>
> >> libtool: compile:  clang -DHAVE_CONFIG_H -I. -I ./include -I ./include
> >> -I ./lib -I ./lib -Wstrict-prototypes -Wall -Wextra -Wno-sign-compare
> >> -Wpointer-arith -Wformat-security -Wno-format-zero-length -Wswitch-enum
> >> -Wunused-parameter -Wbad-function-cast -Wcast-align -Wstrict-prototypes
> >> -Wold-style-definition -Wmissing-prototypes -Wmissing-field-initializers
> >> -Wthread-safety -fno-strict-aliasing -Werror -MT lib/aes128.lo -MD -MP
> >> -MF lib/.deps/aes128.Tpo -c lib/aes128.c -o lib/aes128.o
> >> clang: error: argument unused during compilation: '-I .'
> >> clang: error: argument unused during compilation: '-I ./include'
> >> clang: error: argument unused during compilation: '-I ./include'
> >> clang: error: argument unused during compilation: '-I ./lib'
> >> clang: error: argument unused during compilation: '-I ./lib'
> >> Makefile:3454: recipe for target 'lib/aes128.lo' failed
> > 
> > It's bizarre to report -I options as "argument[s] unused during
> > compilation" so I typed this into Google and found
> > https://github.com/perl11/potion/issues/41, which says (in part):
> > 
> >     It's because ccache is not yet fully clang-compatible, and it
> >     produces this warning, ...
> > 
> > Any chance that ccache is enabled and interfering somehow with the clang
> > build?  Maybe it should be disabled for clang.
> > 
> 
> Good find!  Yes, that's it.
> 
> $ which clang
> /usr/lib64/ccache/clang
> 
> Removing the ccache symlink for clang makes it so I get the same result
> as you.

Great.  I sent out a patch to add this note to INSTALL.md, so that
others might figure it out more easily:
        http://openvswitch.org/pipermail/dev/2015-March/052523.html