[ltt-dev] building ust for android/arm

[matthew.khouzam@ericsson.com (Matthew Khouzam)]

My advice, is kinda silly, but, Mathieu Desnoyers is saying use a newer
version, and the version you are using is not working, I would at least
try out a new version.

What kernel are you using?

If you're on 2.6.16 We actually got it +- working with UST 0.12.

git://git.dorsal.polymtl.ca/~mattkhouzam/ust_documentation

Note: you cannot tell which core is being used if you apply the changes
in the document, so if you are using a multi-cored cpu, you really
really should consider updating your kernel.

Keep us posted with the results,

Matthew


On 11-04-20 01:37 PM, Xing Fan wrote:
> I am building lttng ust-0.6 for android/Arm platform.
>
> However, I have problems to build libust.so. The error msg is:  make:
> *** No rule to make target `build/core/libust-initializer.c', needed
> by
> `out/target/product/u8500/obj/SHARED_LIBRARIES/libust_intermediates/libust-initializer.o'. 
> Stop.
>
> It is very strange that the compiler tries to pick up
> libust-initializer.c from build/core folder, even though I have
> specified that the source file is in my LOCAL_PATH;
>
> Anyone has clue how to write a Android.mk for this?
>
> /Stella
>
>
>
> My Android.mk file looks like this:
> ===========================================================
> include $(call all-subdir-makefiles)
>
> LOCAL_PATH := $(call my-dir)
>
> include $(CLEAR_VARS)
> LOCAL_MODULE := libust
> LOCAL_SRC_FILES := libust-initializer.c
> LOCAL_C_INCLUDES += \
>         $(LOCAL_PATH) \
>         $(LOCAL_PATH)/include \
>         external/userspace-rcu-0.4.6
> include $(BUILD_SHARED_LIBRARY)
> ===============================================================
>
>
> The Makefile.am looks like this
> =========================================================================
>
> ACLOCAL_AMFLAGS = -I config
>
> # The order here is tricky. SUBDIRS applies both to compilation and
> # installation. Programs depending on the libs must be built after
> # libust and '.' (that contains the linker script). However, '.'
> # must be installed after libust so it can overwrite libust.so with
> # the linker script.
> SUBDIRS = snprintf libustcomm libust . tests libustinstr-malloc
> libustd ustd ustctl libustfork include doc
>
> EXTRA_DIST = libust.ldscript.in <http://libust.ldscript.in>
> libust-initializer.c
> dist_bin_SCRIPTS = usttrace
>
> ldscriptsdir = $(libdir)
> ldscripts_DATA = libust.so libust-initializer.o
>
> CLEANFILES = $(ldscripts_DATA) ./tests/libust-initializer.Po
>
> libust.so: libust.ldscript.in <http://libust.ldscript.in>
>     $(SED) -e "s@\@FORMAT\@@$(LIBFORMAT)@" < $< > $@
>
> # It is very important to compile the initializer with PIC otherwise we
> # may get obscure errors when linking to shared libraries.
> libust-initializer.o: libust-initializer.c
>     $(CC) $(CFLAGS) -fno-strict-aliasing -fPIC -c
> -I$(top_srcdir)/include -o $@ $<
> ===========================================================
>
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