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fix linking with -latomic

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Linking with -latomic has been added to pipewire-jack since
b8c58c74d8

However, this is not the right place to add this dependency, atomic_dep
should be added to pipewire_dep to avoid the following build failure:

/home/giuliobenetti/autobuild/run/instance-0/output-1/host/opt/ext-toolchain/bin/../lib/gcc/sparc-buildroot-linux-uclibc/9.3.0/../../../../sparc-buildroot-linux-uclibc/bin/ld: src/pipewire/libpipewire-0.3.so.0.326.0.p/filter.c.o: in function `impl_node_process':
filter.c:(.text+0xf28): undefined reference to `__atomic_fetch_add_4'

Indeed, atomic operation such as __atomic_fetch_add is used in libcamera
as well as in ./spa/plugins/libcamera/libcamera_wrapper.cpp,
./spa/include/spa/utils/ringbuffer.h and ./spa/include/spa/graph/graph.h

Fixes:
 - http://autobuild.buildroot.org/results/b5305e8e7dd1a5e8bfaba72b06251056ba7d1af1

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
This commit is contained in:
Fabrice Fontaine 2021-05-21 07:47:46 +02:00 • committed by Wim Taymans
parent 22d874cdeb
commit fa64d93e64
3 changed files with 9 additions and 10 deletions
Download patch file Download diff file Expand all files Collapse all files

11
meson.build
View file

@ -157,7 +157,7 @@ test_8_byte_atomic = '''
int main(void)
{
int64_t eight;
__atomic_store_n(&eight, 123, __ATOMIC_SEQ_CST);
__atomic_fetch_add(&eight, 123, __ATOMIC_SEQ_CST);
return 0;
}
'''
@ -166,16 +166,15 @@ int main(void)
# operations on any reasonable architecture.
if cc.links(
test_8_byte_atomic,
name : '8-byte __atomic_store_n without libatomic')
name : '8-byte __atomic_fetch_add without libatomic')
atomic_dep = dependency('', required: false)
elif cc.links(
test_8_byte_atomic,
dependencies : libatomic,
name : '8-byte __atomic_store_n with libatomic')
name : '8-byte __atomic_fetch_add with libatomic')
atomic_dep = libatomic
elif get_option('pipewire-jack').enabled()
# Currently only required for the JACK backend
error('8-byte atomic operations are required for pipewire-jack')
else
error('8-byte atomic operations are required')
endif
cdata = configuration_data()