[Buildroot] [PATCH v2] cmake: don't use any header available in $(HOST_DIR)/usr/include

[Baruch Siach <baruch@tkos.co.il>]

Hi Thomas,

On Thu, Mar 05, 2015 at 12:31:48PM +0100, Thomas Petazzoni wrote:
> On Thu, 5 Mar 2015 09:02:55 +0200, Baruch Siach wrote:
> > On Thu, Mar 05, 2015 at 01:45:33AM +0100, Fabio Porcedda wrote:
> > > +# Get rid of -I* options to prevent that a header avaiable in
> > > +# $(HOST_DIR)/usr/include is used instead of a cmake one, e.g. lzma*
> > > +# headers of the xz package
> > > +HOST_CMAKE_CFLAGS = $(shell echo $(HOST_CFLAGS) | sed s/-I[^\ ]*//)
> > 
> > How about (untested):
> > 
> > 	HOST_CMAKE_CFLAGS = $(filter-out -I%,$(HOST_CFLAGS))
> 
> It unfortunately works only if the form:
> 
> 	-I/foo/bar
> 
> is used. If you use:
> 
> 	-I /foo/bar
> 
> which is valid for gcc, then filter-out will filter the -I but
> not /foo/bar.

Right. But the original sed expression doesn't work either. This one seems to 
work:

	s/[[:space:]]-I[[:space:]]*[^\ ]*//

baruch

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