Re: [Xen-devel] [PATCH] minios: make mini-os_app.o depend on included xen libraries

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Tue, Sep 27, 2016 at 06:03:28PM +0200, Juergen Gross wrote:
> On 27/09/16 17:56, Wei Liu wrote:
> > On Tue, Sep 27, 2016 at 02:06:24PM +0200, Juergen Gross wrote:
> >> When building Mini-OS with an app which is using xen libraries like
> >> libxenguest.a let mini-os_app.o depend on the library binaries as it
> >> is statically linked with them.
> >>
> >> While at it add "-T" before app.lds for linking mini-os_app.o to avoid
> >> a linker warning.
> >>
> >> Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
> >> ---
> >>  Makefile | 11 +++++++++--
> >>  1 file changed, 9 insertions(+), 2 deletions(-)
> >>
> >> diff --git a/Makefile b/Makefile
> >> index 81b936f..1d2324c 100644
> >> --- a/Makefile
> >> +++ b/Makefile
> >> @@ -125,11 +125,18 @@ OBJS := $(filter-out $(OBJ_DIR)/lwip%.o $(LWO), 
> >> $(OBJS))
> >>  ifeq ($(libc),y)
> >>  ifeq ($(CONFIG_XC),y)
> >>  APP_LDLIBS += -L$(XEN_ROOT)/stubdom/libs-$(MINIOS_TARGET_ARCH)/toollog 
> >> -whole-archive -lxentoollog -no-whole-archive
> >> +LIBS += 
> >> $(XEN_ROOT)/stubdom/libs-$(MINIOS_TARGET_ARCH)/toollog/libxentoollog.a
> > 
> > I don't follow. Why is the original APP_LDLIBS not enough?
> 
> This just adds the parameters for ld to use the libs.
> 
> > The new dependency doesn't seem to generate any new rules. What do I
> > miss?
> 
> You snipped:
> 
> +$(OBJ_DIR)/$(TARGET)_app.o: $(APP_OBJS) app.lds $(LIBS)
> 
> which adds a dependency on the libs. Now mini-os_app.o will be relinked
> if any of the libs changed. That was not the case before. I realized
> that a modification of libxc wouldn't make it into pvgrub if I didn't
> do a "make clean" and pvgrub was built before.
> 

I see

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

> 
> Juergen

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