[dpdk-stable] [PATCH v2 5/5] build: add libatomic dependency for 32-bit clang compile

[Bruce Richardson <bruce.richardson@intel.com>]

When compiling with clang on 32-bit platforms, we are missing copies
of 64-bit atomic functions. We can solve this by linking against
libatomic for the drivers and libs which need those atomic ops.

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
---
 drivers/event/octeontx/meson.build | 5 +++++
 drivers/event/opdl/meson.build     | 5 +++++
 lib/librte_rcu/meson.build         | 5 +++++
 3 files changed, 15 insertions(+)

diff --git a/drivers/event/octeontx/meson.build b/drivers/event/octeontx/meson.build
index 2b74bb6..3f83be6 100644
--- a/drivers/event/octeontx/meson.build
+++ b/drivers/event/octeontx/meson.build
@@ -11,3 +11,8 @@ sources = files('ssovf_worker.c',
 )
 
 deps += ['common_octeontx', 'mempool_octeontx', 'bus_vdev', 'pmd_octeontx']
+
+# for clang 32-bit compiles we need libatomic for 64-bit atomic ops
+if cc.get_id() == 'clang' and dpdk_conf.get('RTE_ARCH_64') == false
+	ext_deps += cc.find_library('atomic')
+endif
diff --git a/drivers/event/opdl/meson.build b/drivers/event/opdl/meson.build
index cc6029c..e1cfb2d 100644
--- a/drivers/event/opdl/meson.build
+++ b/drivers/event/opdl/meson.build
@@ -9,3 +9,8 @@ sources = files(
 	'opdl_test.c',
 )
 deps += ['bus_vdev']
+
+# for clang 32-bit compiles we need libatomic for 64-bit atomic ops
+if cc.get_id() == 'clang' and dpdk_conf.get('RTE_ARCH_64') == false
+	ext_deps += cc.find_library('atomic')
+endif
diff --git a/lib/librte_rcu/meson.build b/lib/librte_rcu/meson.build
index 0c2d5a2..43edb87 100644
--- a/lib/librte_rcu/meson.build
+++ b/lib/librte_rcu/meson.build
@@ -5,3 +5,8 @@ allow_experimental_apis = true
 
 sources = files('rte_rcu_qsbr.c')
 headers = files('rte_rcu_qsbr.h')
+
+# for clang 32-bit compiles we need libatomic for 64-bit atomic ops
+if cc.get_id() == 'clang' and dpdk_conf.get('RTE_ARCH_64') == false
+	ext_deps += cc.find_library('atomic')
+endif
-- 
2.7.4