package/gnutls: fix build on sparc
gnutls source code uses the C++11 <atomic> functionality since
7978a73346,
which internally is implemented using the __atomic_*() gcc built-ins
On certain architectures, the __atomic_*() built-ins are implemented in
the libatomic library that comes with the rest of the gcc runtime. Due
to this, code using <atomic> might need to link against libatomic,
otherwise one hits build issues such as:
../lib/.libs/libgnutls.so: undefined reference to `__atomic_fetch_sub_4'
on an architecture like SPARC.
To solve this, link against libatomic if BR2_PACKAGE_HAS_LIBATOMIC is set.
This fix gnutls build failures as well as cups, gnupg and libmicrohttpd
Fixes:
- http://autobuild.buildroot.org/results/1c7541fc6ac4b52d1dfe02a9a7d61db90f4521eb
- http://autobuild.buildroot.org/results/42c8803b98e38ebd48870fe6b1a20a1d6c351e5f
- http://autobuild.buildroot.org/results/a1e96d02d41f7fec0f5327f65fb34405f963a1e9
- http://autobuild.buildroot.org/results/59c92706457a9da29dd44425e546a7c80c18b454
Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
e5a2354b6b