[Qemu-devel] [PATCH 0/3] build-sys: Exclude empty object files when linking libqemuutil.a

[Qemu-devel] [PATCH 0/3] build-sys: Exclude empty object files when linking libqemuutil.a

[Fam Zheng]

On Mac OS X, ranlib complains on a few empty objects:

  AR    libqemuutil.a
  /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib:
  file: libqemuutil.a(generated-tracers.o) has no symbols
  /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib:
  file: libqemuutil.a(host-utils.o) has no symbols
  /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib:
  file: libqemuutil.a(getauxval.o) has no symbols

This series fixes the warnings.

Fam

Fam Zheng (3):
  trace: Only link generated-tracers.o with "simple" backend
  util: Move general qemu_getauxval to util/getauxval.c
  util: Don't link host-utils.o if it's empty

 include/qemu/osdep.h | 4 ----
 trace/Makefile.objs  | 3 +--
 util/Makefile.objs   | 3 ++-
 util/getauxval.c     | 8 ++++++++
 util/host-utils.c    | 2 --
 5 files changed, 11 insertions(+), 9 deletions(-)

-- 
2.1.0.27.g96db324

[Qemu-devel] [PATCH 1/3] trace: Only link generated-tracers.o with "simple" backend

[Fam Zheng]

In any other cases the object file is effectively empty, which is
disliked by ranlib and nm on Mac OS X.

Reported-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Fam Zheng <famz@redhat.com>
---
 trace/Makefile.objs | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/trace/Makefile.objs b/trace/Makefile.objs
index 387f191..46de95c 100644
--- a/trace/Makefile.objs
+++ b/trace/Makefile.objs
@@ -140,8 +140,7 @@ $(obj)/generated-tcg-tracers.h-timestamp: $(SRC_PATH)/trace-events $(BUILD_DIR)/
 ######################################################################
 # Backend code
 
-util-obj-$(CONFIG_TRACE_SIMPLE) += simple.o
+util-obj-$(CONFIG_TRACE_SIMPLE) += simple.o generated-tracers.o
 util-obj-$(CONFIG_TRACE_FTRACE) += ftrace.o
 util-obj-$(CONFIG_TRACE_UST) += generated-ust.o
 util-obj-y += control.o
-util-obj-y += generated-tracers.o
-- 
2.1.0.27.g96db324

Re: [Qemu-devel] [PATCH 1/3] trace: Only link generated-tracers.o with "simple" backend

[Stefan Hajnoczi]

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On Wed, Sep 03, 2014 at 11:44:54AM +0800, Fam Zheng wrote:
> In any other cases the object file is effectively empty, which is
> disliked by ranlib and nm on Mac OS X.
> 
> Reported-by: Peter Maydell <peter.maydell@linaro.org>
> Signed-off-by: Fam Zheng <famz@redhat.com>
> ---
>  trace/Makefile.objs | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)

If another trace backend uses generate_c() there will be a link error so
they'll figure out they need to add it in the makefile.

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>

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[Qemu-devel] [PATCH 2/3] util: Move general qemu_getauxval to util/getauxval.c

[Fam Zheng]

So that we won't have an empty getauxval.o which is disliked by ranlib.

Reported-by: Peter Maydell <peter.maydell@linaro.org>
Suggested-by: Paolo Bonzini@redhat.com
Signed-off-by: Fam Zheng <famz@redhat.com>
---
 include/qemu/osdep.h | 4 ----
 util/getauxval.c     | 8 ++++++++
 2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/include/qemu/osdep.h b/include/qemu/osdep.h
index 9dd43fc..1565404 100644
--- a/include/qemu/osdep.h
+++ b/include/qemu/osdep.h
@@ -246,11 +246,7 @@ char *qemu_get_exec_dir(void);
  * Search the auxiliary vector for @type, returning the value
  * or 0 if @type is not present.
  */
-#if defined(CONFIG_GETAUXVAL) || defined(__linux__)
 unsigned long qemu_getauxval(unsigned long type);
-#else
-static inline unsigned long qemu_getauxval(unsigned long type) { return 0; }
-#endif
 
 void qemu_set_tty_echo(int fd, bool echo);
 
diff --git a/util/getauxval.c b/util/getauxval.c
index 25f48e5..1732ace 100644
--- a/util/getauxval.c
+++ b/util/getauxval.c
@@ -98,4 +98,12 @@ unsigned long qemu_getauxval(unsigned long type)
 
     return 0;
 }
+
+#else
+
+unsigned long qemu_getauxval(unsigned long type)
+{
+    return 0;
+}
+
 #endif
-- 
2.1.0.27.g96db324

[Qemu-devel] [PATCH 3/3] util: Don't link host-utils.o if it's empty

[Fam Zheng]

Reported-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Fam Zheng <famz@redhat.com>
---
 util/Makefile.objs | 3 ++-
 util/host-utils.c  | 2 --
 2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/util/Makefile.objs b/util/Makefile.objs
index 6b3c83b..cb8862b 100644
--- a/util/Makefile.objs
+++ b/util/Makefile.objs
@@ -1,7 +1,8 @@
 util-obj-y = osdep.o cutils.o unicode.o qemu-timer-common.o
 util-obj-$(CONFIG_WIN32) += oslib-win32.o qemu-thread-win32.o event_notifier-win32.o
 util-obj-$(CONFIG_POSIX) += oslib-posix.o qemu-thread-posix.o event_notifier-posix.o qemu-openpty.o
-util-obj-y += envlist.o path.o host-utils.o module.o
+util-obj-y += envlist.o path.o module.o
+util-obj-$(call lnot,$(CONFIG_INT128)) += host-utils.o
 util-obj-y += bitmap.o bitops.o hbitmap.o
 util-obj-y += fifo8.o
 util-obj-y += acl.o
diff --git a/util/host-utils.c b/util/host-utils.c
index ee57ef5..102e5bf 100644
--- a/util/host-utils.c
+++ b/util/host-utils.c
@@ -28,7 +28,6 @@
 #include "qemu/host-utils.h"
 
 /* Long integer helpers */
-#ifndef CONFIG_INT128
 static inline void mul64(uint64_t *plow, uint64_t *phigh,
                          uint64_t a, uint64_t b)
 {
@@ -161,4 +160,3 @@ int divs128(int64_t *plow, int64_t *phigh, int64_t divisor)
     return overflow;
 }
 
-#endif /* !CONFIG_INT128 */
-- 
2.1.0.27.g96db324

Re: [Qemu-devel] [PATCH 0/3] build-sys: Exclude empty object files when linking libqemuutil.a

[Paolo Bonzini]

Il 03/09/2014 05:44, Fam Zheng ha scritto:
> On Mac OS X, ranlib complains on a few empty objects:
> 
>   AR    libqemuutil.a
>   /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib:
>   file: libqemuutil.a(generated-tracers.o) has no symbols
>   /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib:
>   file: libqemuutil.a(host-utils.o) has no symbols
>   /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib:
>   file: libqemuutil.a(getauxval.o) has no symbols
> 
> This series fixes the warnings.
> 
> Fam
> 
> Fam Zheng (3):
>   trace: Only link generated-tracers.o with "simple" backend
>   util: Move general qemu_getauxval to util/getauxval.c
>   util: Don't link host-utils.o if it's empty
> 
>  include/qemu/osdep.h | 4 ----
>  trace/Makefile.objs  | 3 +--
>  util/Makefile.objs   | 3 ++-
>  util/getauxval.c     | 8 ++++++++
>  util/host-utils.c    | 2 --
>  5 files changed, 11 insertions(+), 9 deletions(-)
> 

Thanks, looks good.  Stefan, can you ack the first patch?

Paolo

Re: [Qemu-devel] [PATCH 0/3] build-sys: Exclude empty object files when linking libqemuutil.a

[Fam Zheng]

On Wed, 09/03 09:53, Paolo Bonzini wrote:
> Il 03/09/2014 05:44, Fam Zheng ha scritto:
> > On Mac OS X, ranlib complains on a few empty objects:
> > 
> >   AR    libqemuutil.a
> >   /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib:
> >   file: libqemuutil.a(generated-tracers.o) has no symbols
> >   /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib:
> >   file: libqemuutil.a(host-utils.o) has no symbols
> >   /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib:
> >   file: libqemuutil.a(getauxval.o) has no symbols
> > 
> > This series fixes the warnings.
> > 
> > Fam
> > 
> > Fam Zheng (3):
> >   trace: Only link generated-tracers.o with "simple" backend
> >   util: Move general qemu_getauxval to util/getauxval.c
> >   util: Don't link host-utils.o if it's empty
> > 
> >  include/qemu/osdep.h | 4 ----
> >  trace/Makefile.objs  | 3 +--
> >  util/Makefile.objs   | 3 ++-
> >  util/getauxval.c     | 8 ++++++++
> >  util/host-utils.c    | 2 --
> >  5 files changed, 11 insertions(+), 9 deletions(-)
> > 
> 
> Thanks, looks good.  Stefan, can you ack the first patch?
> 

Paolo,

Since Stefan reviewed the first patch, would you apply this series?

Fam

Re: [Qemu-devel] [PATCH 0/3] build-sys: Exclude empty object files when linking libqemuutil.a

[Paolo Bonzini]

Il 10/09/2014 08:19, Fam Zheng ha scritto:
> Paolo,
> 
> Since Stefan reviewed the first patch, would you apply this series?

Yes, pull request coming soon.

Paolo

Re: [Qemu-devel] [PATCH 0/3] build-sys: Exclude empty object files when linking libqemuutil.a

[Peter Maydell]

On 3 September 2014 04:44, Fam Zheng <famz@redhat.com> wrote:
> On Mac OS X, ranlib complains on a few empty objects:
>
>   AR    libqemuutil.a
>   /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib:
>   file: libqemuutil.a(generated-tracers.o) has no symbols
>   /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib:
>   file: libqemuutil.a(host-utils.o) has no symbols
>   /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib:
>   file: libqemuutil.a(getauxval.o) has no symbols
>
> This series fixes the warnings.
>
> Fam
>
> Fam Zheng (3):
>   trace: Only link generated-tracers.o with "simple" backend
>   util: Move general qemu_getauxval to util/getauxval.c
>   util: Don't link host-utils.o if it's empty

Series
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>

This fixes both the ranlib warnings and the ones from nm
that your new patch was producing. Thanks!

-- PMM