[meta-oe][PATCH] libcereal: Link libatomics on mips for ptests

[Khem Raj <raj.khem@gmail.com>]

clang/mips emits calls to atomic builtins which it expects from C
runtime perhaps but compiler-rt does not provide them so link in
libatomics

Fixes
atomic.cpp:(.text._ZN6cereal12Inpu
tArchiveINS_16JSONInputArchiveELj0EE7processIRNSt3__16atomicIdEEEEvOT_[_ZN6cereal12InputArchiveINS_16JSONInputArchiveELj0EE7processIRNSt3__16atomicIdEEEEvOT_]+0x10c): undefined reference to `__atomic_store_8'

Signed-off-by: Khem Raj <raj.khem@gmail.com>
---
 meta-oe/recipes-support/libcereal/libcereal_1.3.2.bb | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/meta-oe/recipes-support/libcereal/libcereal_1.3.2.bb b/meta-oe/recipes-support/libcereal/libcereal_1.3.2.bb
index 250ea97f40..fb37de3c30 100644
--- a/meta-oe/recipes-support/libcereal/libcereal_1.3.2.bb
+++ b/meta-oe/recipes-support/libcereal/libcereal_1.3.2.bb
@@ -26,9 +26,10 @@ S = "${WORKDIR}/git"
 
 inherit cmake pkgconfig ptest
 
-PACKAGECONFIG ??= "${@bb.utils.contains('PTEST_ENABLED', '1', 'with-tests', '', d)}"
-PACKAGECONFIG[with-tests] = "-DWITH_WERROR=OFF -DBUILD_TESTS=ON,,"
+LIBATOMIC:mips:toolchain-clang = "${@bb.utils.contains('PTEST_ENABLED', '1', '-DCEREAL_THREAD_LIBS="-latomic"', '', d)}"
 
+PACKAGECONFIG ??= "${@bb.utils.contains('PTEST_ENABLED', '1', 'with-tests', '', d)}"
+PACKAGECONFIG[with-tests] = "-DWITH_WERROR=OFF -DBUILD_TESTS=ON ${LIBATOMIC},,"
 EXTRA_OECMAKE = "${@bb.utils.contains('DISTRO_FEATURES', 'ptest', '', '-DJUST_INSTALL_CEREAL=ON', d)} \
                  ${@['','-DSKIP_PORTABILITY_TEST=ON'][d.getVar('SITEINFO_BITS') != '32']}"
 
-- 
2.35.1