python3-grpcio: add bbappend

[AGL/meta-agl-demo.git] / recipes-devtools / python / python3-grpcio_agldemo.inc

diff --git a/recipes-devtools/python/python3-grpcio_agldemo.inc b/recipes-devtools/python/python3-grpcio_agldemo.inc
new file mode 100644 (file)
index 0000000..8236a34
--- /dev/null
+++ b/recipes-devtools/python/python3-grpcio_agldemo.inc
@@ -0,0 +1,17 @@
+# For some reason the atomics presence test in the grpc build
+# passes on RISC-V even though linking with libatomic is actually
+# needed. There are some mentions on the web of some atomics
+# support incorrectly being in the libc stub on RISC-V, so a
+# fix could be tracking down if that is the case and if it has
+# been fixed in newer libc. Otherwise, the compile test in grpc
+# will need to be changed to some other function that is known to
+# only be in libatomic on RISC-V.
+#
+# The next problem is that setting GRPC_PYTHON_LDFLAGS to any value
+# ends up not adding linking with pthread due to the way the logic
+# is set up, so we need to actually add it explicitly. The upstream
+# recipe seems slightly broken in this respect.
+
+GRPC_LDFLAGS ?= " -lpthread"
+GRPC_LDFLAGS:append:riscv64 = " -latomic"
+export GRPC_PYTHON_LDFLAGS = "${GRPC_LDFLAGS}"