[poky] Library paths for Makefile based recipes

[Darren Hart]

On 12/28/2010 04:43 PM, Tian, Kevin wrote:
>> From: Darren Hart
>> Sent: Wednesday, December 29, 2010 8:30 AM
>>
>> I'm working on packaging kernelshark ("make gui" for the trace-cmd recipe
>> basically). It fails trying to link to -lgtk-x11-2.0. I have added gtk+
>> as a DEPENDS and the library does exist in the sysroots. I have also added
>> "inherit pkgconfig" as the project Makefile uses it extensively.
>>
>> gcc trace-view-main.o trace-view.o trace-view-store.o trace-filter.o trace-compat.o
>> trace-hash.o libtracecmd.a -rdynamic -o trace-view -pthread -lgtk-x11-2.0 -lgdk-x11-2.0
>> -latk-1.0 -lgio-2.0 -lpangoft2-1.0 -lgdk_pixbuf-2.0 -lpangocairo-1.0 -lcairo -lpango-1.0
>> -lfreetype -lfontconfig -lgobject-2.0 -lgmodule-2.0 -lgthread-2.0 -lrt -lglib-2.0   -L.
>> -ltracecmd -ldl
>> | /usr/bin/ld: cannot find -lgtk-x11-2.0
>
> it looks that native gcc/binutils are used here, instead of the cross one. Or else gcc
> should have a target prefix like i568-poky-linux-gcc, and ld should come from your
> native sysroot...


Yes, I noticed this too. Turns out the Makefile was forcing CC=gcc.


>
>> | collect2: ld returned 1 exit status
>> | make[1]: *** [trace-view] Error 1
>> | make[1]: *** Waiting for unfinished jobs....
>> | make: *** [gui] Error 2
>> | FATAL: oe_runmake failed
>> | ERROR: Task failed: ('function do_compile failed',
>> '/vol/1/dvhart/poky.git/build/tmp/work/core2-poky-linux/kernelshark-1.0.4+git0+0d2522
>> 24626bd6926324f023a65f20c165232891-r0/temp/log.do_compile.12830')
>> NOTE: package
>> kernelshark-1.0.4+git0+0d252224626bd6926324f023a65f20c165232891-r0: task
>> do_compile: Failed
>> ERROR: Task 8
>> (/home/dvhart/data/poky.git/meta/recipes-kernel/trace-cmd/kernelshark_git.bb,
>> do_compile) failed with 1
>> ERROR: '/home/dvhart/data/poky.git/meta/recipes-kernel/trace-cmd/kernelshark_git.bb'
>> failed
>>
>> Without the "gui" target, trace-cmd doesn't link against anything outside of
>> libc and ld, so the original recipe doesn't run into this.
>
> given earlier confusion, I'm worried whether original trace-cmd does work as expected,
> e.g. whether it runs on a non-x86 target?


I'm confident it does not. I'll be sending a fix for that along with my 
kernelshark recipe.


>
>>
>> How does bitbake try to make the library path available to a make based
>> project? I've tried various incantations from other non-autotools gtk+
>> based recipes:
>>
>> do_compile_prepend = " \
>>         export LDFLAGS='${LDFLAGS} `${STAGING_BINDIR_NATIVE}/pkg-config
>> gtk+-2.0 --libs`'; \
>>        export CFLAGS='${CFLAGS} -I./ `${STAGING_BINDIR_NATIVE}/pkg-config
>> gtk+-2.0 --cflags`'; "
>>
>> export VERBOSE=1
>> CFLAGS += "-L ${STAGING_LIBDIR}"
>> LDFLAGS += "-L ${STAGING_LIBDIR}"
>> CFLAGS_prepend = "-L ${STAGING_LIBDIR}"
>> LDFLAGS_prepend = "-L ${STAGING_LIBDIR}"
>>
>> However, these don't appear to impact the commands executed by the project
>> Makefile (despite the fact that it tries to import existing CFLAGS).
>>
>
> No idea here. You may need check the Makefile carefully whether there's any
> tricky lines breaking things here... At least you may change Makefile directly first. :-)

Yes, this is the path I took. Now working back up the stack to try and 
get it working with poky.

Thanks,

-- 
Darren Hart
Yocto Linux Kernel