Thanks for quick response!
I'm seeing this with lttng-ust 2.13.0:
| make[3]: Entering directory
'/home/alex/development/poky/build-32/tmp/work/core2-32-poky-linux/lttng-ust/2_2.13.0-r0/build/tests/unit/libringbuffer'
| ../../../i686-poky-linux-libtool --tag=CC --mode=link i686-poky-linux-gcc
-m32 -march=core2 -mtune=core2 -msse3 -mfpmath=sse -fstack-protector-strong
-O2 -D_FORTIFY_SOURCE=2 -Wformat -Wformat-security -Werror=format-security
--sysroot=/home/alex/development/poky/build-32/tmp/work/core2-32-poky-linux/lttng-ust/2_2.13.0-r0/recipe-sysroot
-fno-strict-aliasing -Wall -Wextra -Wmissing-prototypes -Wmissing-declarations
-Wnull-dereference -Wundef -Wshadow -Wjump-misses-init
-Wsuggest-attribute=format -Wnested-externs -Wwrite-strings -Wformat=2
-Wstrict-aliasing -Wmissing-noreturn -Winit-self -Wduplicated-cond
-Wduplicated-branches -Wlogical-op -Wno-sign-compare
-Wno-missing-field-initializers -Wno-null-dereference -Wold-style-definition
-Wstrict-prototypes -pthread -O2 -pipe -g -feliminate-unused-debug-types
-fmacro-prefix-map=/home/alex/development/poky/build-32/tmp/work/core2-32-poky-linux/lttng-ust/2_2.13.0-r0=/usr/src/debug/lttng-ust/2_2.13.0-r0
-fdebug-prefix-map=/home/alex/development/poky/build-32/tmp/work/core2-32-poky-linux/lttng-ust/2_2.13.0-r0=/usr/src/debug/lttng-ust/2_2.13.0-r0
-fdebug-prefix-map=/home/alex/development/poky/build-32/tmp/work/core2-32-poky-linux/lttng-ust/2_2.13.0-r0/recipe-sysroot=
-fdebug-prefix-map=/home/alex/development/poky/build-32/tmp/work/core2-32-poky-linux/lttng-ust/2_2.13.0-r0/recipe-sysroot-native=
-Wl,-O1 -Wl,--hash-style=gnu -Wl,--as-needed
-fmacro-prefix-map=/home/alex/development/poky/build-32/tmp/work/core2-32-poky-linux/lttng-ust/2_2.13.0-r0=/usr/src/debug/lttng-ust/2_2.13.0-r0
-fdebug-prefix-map=/home/alex/development/poky/build-32/tmp/work/core2-32-poky-linux/lttng-ust/2_2.13.0-r0=/usr/src/debug/lttng-ust/2_2.13.0-r0
-fdebug-prefix-map=/home/alex/development/poky/build-32/tmp/work/core2-32-poky-linux/lttng-ust/2_2.13.0-r0/recipe-sysroot=
-fdebug-prefix-map=/home/alex/development/poky/build-32/tmp/work/core2-32-poky-linux/lttng-ust/2_2.13.0-r0/recipe-sysroot-native=
-Wl,-z,relro,-z,now -o test_shm shm.o ../../../src/common/libringbuffer.la
../../../src/lib/lttng-ust-common/liblttng-ust-common.la
../../../src/common/libcommon.la ../../../tests/utils/libtap.a
| i686-poky-linux-libtool: link: i686-poky-linux-gcc -m32 -march=core2
-mtune=core2 -msse3 -mfpmath=sse -fstack-protector-strong -O2
-D_FORTIFY_SOURCE=2 -Wformat -Wformat-security -Werror=format-security
--sysroot=/home/alex/development/poky/build-32/tmp/work/core2-32-poky-linux/lttng-ust/2_2.13.0-r0/recipe-sysroot
-fno-strict-aliasing -Wall -Wextra -Wmissing-prototypes -Wmissing-declarations
-Wnull-dereference -Wundef -Wshadow -Wjump-misses-init
-Wsuggest-attribute=format -Wnested-externs -Wwrite-strings -Wformat=2
-Wstrict-aliasing -Wmissing-noreturn -Winit-self -Wduplicated-cond
-Wduplicated-branches -Wlogical-op -Wno-sign-compare
-Wno-missing-field-initializers -Wno-null-dereference -Wold-style-definition
-Wstrict-prototypes -pthread -O2 -pipe -g -feliminate-unused-debug-types
-fmacro-prefix-map=/home/alex/development/poky/build-32/tmp/work/core2-32-poky-linux/lttng-ust/2_2.13.0-r0=/usr/src/debug/lttng-ust/2_2.13.0-r0
-fdebug-prefix-map=/home/alex/development/poky/build-32/tmp/work/core2-32-poky-linux/lttng-ust/2_2.13.0-r0=/usr/src/debug/lttng-ust/2_2.13.0-r0
-fdebug-prefix-map=/home/alex/development/poky/build-32/tmp/work/core2-32-poky-linux/lttng-ust/2_2.13.0-r0/recipe-sysroot=
-fdebug-prefix-map=/home/alex/development/poky/build-32/tmp/work/core2-32-poky-linux/lttng-ust/2_2.13.0-r0/recipe-sysroot-native=
-Wl,-O1 -Wl,--hash-style=gnu -Wl,--as-needed
-fmacro-prefix-map=/home/alex/development/poky/build-32/tmp/work/core2-32-poky-linux/lttng-ust/2_2.13.0-r0=/usr/src/debug/lttng-ust/2_2.13.0-r0
-fdebug-prefix-map=/home/alex/development/poky/build-32/tmp/work/core2-32-poky-linux/lttng-ust/2_2.13.0-r0=/usr/src/debug/lttng-ust/2_2.13.0-r0
-fdebug-prefix-map=/home/alex/development/poky/build-32/tmp/work/core2-32-poky-linux/lttng-ust/2_2.13.0-r0/recipe-sysroot=
-fdebug-prefix-map=/home/alex/development/poky/build-32/tmp/work/core2-32-poky-linux/lttng-ust/2_2.13.0-r0/recipe-sysroot-native=
-Wl,-z -Wl,relro -Wl,-z -Wl,now -o .libs/test_shm shm.o
../../../src/common/.libs/libringbuffer.a -lrt
../../../src/lib/lttng-ust-common/.libs/liblttng-ust-common.so -ldl
../../../src/common/.libs/libcommon.a ../../../tests/utils/libtap.a -pthread
|
/home/alex/development/poky/build-32/tmp/work/core2-32-poky-linux/lttng-ust/2_2.13.0-r0/recipe-sysroot-native/usr/bin/i686-poky-linux/../../libexec/i686-poky-linux/gcc/i686-poky-linux/11.2.0/ld:
../../../src/lib/lttng-ust-common/.libs/liblttng-ust-common.so: undefined
reference to `_compat_uatomic_set'
|
/home/alex/development/poky/build-32/tmp/work/core2-32-poky-linux/lttng-ust/2_2.13.0-r0/recipe-sysroot-native/usr/bin/i686-poky-linux/../../libexec/i686-poky-linux/gcc/i686-poky-linux/11.2.0/ld:
../../../src/lib/lttng-ust-common/.libs/liblttng-ust-common.so: undefined
reference to `_compat_uatomic_xchg'
|
/home/alex/development/poky/build-32/tmp/work/core2-32-poky-linux/lttng-ust/2_2.13.0-r0/recipe-sysroot-native/usr/bin/i686-poky-linux/../../libexec/i686-poky-linux/gcc/i686-poky-linux/11.2.0/ld:
../../../src/lib/lttng-ust-common/.libs/liblttng-ust-common.so: undefined
reference to `__rcu_cas_init'
|
/home/alex/development/poky/build-32/tmp/work/core2-32-poky-linux/lttng-ust/2_2.13.0-r0/recipe-sysroot-native/usr/bin/i686-poky-linux/../../libexec/i686-poky-linux/gcc/i686-poky-linux/11.2.0/ld:
../../../src/lib/lttng-ust-common/.libs/liblttng-ust-common.so: undefined
reference to `__rcu_cas_avail'
|
/home/alex/development/poky/build-32/tmp/work/core2-32-poky-linux/lttng-ust/2_2.13.0-r0/recipe-sysroot-native/usr/bin/i686-poky-linux/../../libexec/i686-poky-linux/gcc/i686-poky-linux/11.2.0/ld:
../../../src/lib/lttng-ust-common/.libs/liblttng-ust-common.so: undefined
reference to `_compat_uatomic_cmpxchg'
| collect2: error: ld returned 1 exit status
| make[3]: *** [Makefile:404: test_shm] Error 1
| make[3]: Leaving directory
'/home/alex/development/poky/build-32/tmp/work/core2-32-poky-linux/lttng-ust/2_2.13.0-r0/build/tests/unit/libringbuffer'
Cheers,
Alex
On Thursday, December 02, 2021 21:20 CET, Jonathan Rajotte-Julien
<jonathan.rajotte-jul...@efficios.com> wrote:
> Hi Alexander,
>
> Thanks for sending this patch. Could you provide more details regarding the
> linking errors?
>
> lttng-ust must not depends on liburcu at runtime since commit
> 10544ee8af31afb239e3dfa71cb2fe09d3de3771
>
> commit 10544ee8af31afb239e3dfa71cb2fe09d3de3771
> Author: Mathieu Desnoyers <mathieu.desnoy...@efficios.com>
> Date: Wed Nov 11 17:28:06 2020 -0500
>
> Remove runtime dependency on liburcu shared objects
>
> Remove the runtime dependency on:
>
> - liblurcu-bp.so
> - liblurcu-cds.so
> - compat futex code.
>
> By integrating those into the lttng-ust project.
>
> For rculfhash, only the minimum pieces needed by lttng-ust are
> integrated (no auto-resize, no accounting).
>
> lttng-ust still requires liburcu at build time for header dependencies.
>
> Signed-off-by: Mathieu Desnoyers <mathieu.desnoy...@efficios.com>
> Change-Id: Idffb205b27b1bb0f972523c3ce3bdaf25bfe1710
>
>
> Cheers
>
> ----- Original Message -----
> > From: "Alexander Kanavin" <a...@linutronix.de>
> > To: "lttng-dev" <lttng-dev@lists.lttng.org>, "Francis Deslauriers"
> > <francis.deslauri...@efficios.com>, "jonathan
> > rajotte-julien" <jonathan.rajotte-jul...@efficios.com>
> > Cc: "Alexander Kanavin" <a...@linutronix.de>
> > Sent: Thursday, December 2, 2021 3:04:12 PM
> > Subject: [PATCH] lttng-ust-common: link with liburcu explicitly
>
> > Otherwise linking errors are seen on x86-32.
> > ---
> > src/lib/lttng-ust-common/Makefile.am | 1 +
> > 1 file changed, 1 insertion(+)
> >
> > diff --git a/src/lib/lttng-ust-common/Makefile.am
> > b/src/lib/lttng-ust-common/Makefile.am
> > index caeea2be..0130628c 100644
> > --- a/src/lib/lttng-ust-common/Makefile.am
> > +++ b/src/lib/lttng-ust-common/Makefile.am
> > @@ -15,6 +15,7 @@ liblttng_ust_common_la_SOURCES = \
> >
> > liblttng_ust_common_la_LIBADD = \
> > $(top_builddir)/src/common/libcommon.la \
> > + $(URCU_LIBS) \
> > $(DL_LIBS)
> >
> > liblttng_ust_common_la_LDFLAGS = -no-undefined -version-info
> > $(LTTNG_UST_LIBRARY_VERSION)
> > --
> > 2.20.1
--
Alexander Kanavin
Linutronix GmbH | Bahnhofstrasse 3 | D-88690 Uhldingen-Mühlhofen
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