[dpdk-dev] [PATCH v3 03/12] eal/build: add libatomic dependency for 32-bit clang

[Phil Yang]

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: Phil Yang <phil.yang at arm.com>
Reviewed-by: Ruifeng Wang <ruifeng.wang at arm.com>
Reviewed-by: Gavin Hu <gavin.hu at arm.com>
---
 lib/librte_eal/meson.build | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/lib/librte_eal/meson.build b/lib/librte_eal/meson.build
index 4be5118..3b10eae 100644
--- a/lib/librte_eal/meson.build
+++ b/lib/librte_eal/meson.build
@@ -20,6 +20,12 @@ endif
 if cc.has_function('getentropy', prefix : '#include <unistd.h>')
 	cflags += '-DRTE_LIBEAL_USE_GETENTROPY'
 endif
+
+# 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
+
 sources = common_sources + env_sources
 objs = common_objs + env_objs
 headers = common_headers + env_headers
-- 
2.7.4