[oe] [meta-oe][PATCH] flatbuffers: add PIC compiler flag required for aarch64

[Andrey Zhizhikin]

Add PIC flag to CXXFLAGS in order to solve the issue with linking
against the library for aarch64.

Without PIC enabled, linking against this library fails with
following messages:

relocation R_AARCH64_ADR_PREL_PG_HI21 against symbol `[snap]'
which may bind externally can not be used when making a
shared object; recompile with -fPIC

Signed-off-by: Andrey Zhizhikin <andrey.z at gmail.com>
---
 meta-oe/recipes-devtools/flatbuffers/flatbuffers_1.11.0.bb | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/meta-oe/recipes-devtools/flatbuffers/flatbuffers_1.11.0.bb b/meta-oe/recipes-devtools/flatbuffers/flatbuffers_1.11.0.bb
index bd6dcef4e..529441de1 100644
--- a/meta-oe/recipes-devtools/flatbuffers/flatbuffers_1.11.0.bb
+++ b/meta-oe/recipes-devtools/flatbuffers/flatbuffers_1.11.0.bb
@@ -17,8 +17,8 @@ SRC_URI = "git://github.com/google/flatbuffers.git \
           "
 
 # Make sure C++11 is used, required for example for GCC 4.9
-CXXFLAGS += "-std=c++11"
-BUILD_CXXFLAGS += "-std=c++11"
+CXXFLAGS += "-std=c++11 -fPIC"
+BUILD_CXXFLAGS += "-std=c++11 -fPIC"
 
 # BUILD_TYPE=Release is required, otherwise flatc is not installed
 EXTRA_OECMAKE += "\
-- 
2.17.1