Re: [Xen-devel] [PATCH] tools/libxc: Fix use of zlib-options when building the domain builder

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Fri, Feb 12, 2016 at 07:21:31PM +0000, Andrew Cooper wrote:
> c/s de0f8c7c changed the use of zlib-options, and moved it from being locally
> generated to coming from ./configure.
> 

Wow, this is ancient commit.

> However, it neglected to modify the users of zlib-options.  The curious use of
> $(call ...) was to select either the -D or -l options as appropriate, but c/s
> de0f8c7c broke this by loosing the `grep`.
> 
> Instead, use $(filter ...) to pick out either the -D or -l options.  This
> fixes the build with Clang, which complains at passing '-llzma' when trying
> to compile xc_dom_bzimageloader.c to xc_dom_bzimageloader.o.
> 
> Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

Acked-by: Wei Liu <wei.liu2@xxxxxxxxxx>

> ---
> CC: Roger Pau Monne <roger.pau@xxxxxxxxxx>
> CC: Ian Campbell <Ian.Campbell@xxxxxxxxxx>
> CC: Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>
> CC: Wei Liu <wei.liu2@xxxxxxxxxx>
> ---
>  tools/libxc/Makefile | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/tools/libxc/Makefile b/tools/libxc/Makefile
> index 0a8614c..608404f 100644
> --- a/tools/libxc/Makefile
> +++ b/tools/libxc/Makefile
> @@ -226,10 +226,10 @@ else
>  zlib-options = $(ZLIB)
>  endif
>  
> -xc_dom_bzimageloader.o: CFLAGS += $(call zlib-options,D)
> -xc_dom_bzimageloader.opic: CFLAGS += $(call zlib-options,D)
> +xc_dom_bzimageloader.o: CFLAGS += $(filter -D%,$(zlib-options))
> +xc_dom_bzimageloader.opic: CFLAGS += $(filter -D%,$(zlib-options))
>  
> -libxenguest.so.$(MAJOR).$(MINOR): COMPRESSION_LIBS = $(call zlib-options,l)
> +libxenguest.so.$(MAJOR).$(MINOR): COMPRESSION_LIBS = $(filter 
> -l%,$(zlib-options))
>  libxenguest.so.$(MAJOR).$(MINOR): $(GUEST_PIC_OBJS) libxenctrl.so
>       $(CC) $(LDFLAGS) -Wl,$(SONAME_LDFLAG) -Wl,libxenguest.so.$(MAJOR) 
> $(SHLIB_LDFLAGS) -o $@ $(GUEST_PIC_OBJS) $(COMPRESSION_LIBS) -lz 
> $(LDLIBS_libxenevtchn) $(LDLIBS_libxenctrl) $(PTHREAD_LIBS) $(APPEND_LDFLAGS)
>  
> -- 
> 2.1.4
> 

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