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package/grpc: add workaround for gcc<5

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Fixes:
http://autobuild.buildroot.net/results/3d5/3d5e0b2b8c6670cf9a43ceac4b8173760e1f933c/

Commit e0e54afd0c (package/grpc: bump to version 1.25.0) bumped the grpc
version and added a workaround for 'failure memory model cannot be stronger
than success memory model for '__atomic_compare_exchange'.  This workaround
is also needed for 1.23.0, so add it here as well.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
This commit is contained in:
Peter Korsgaard 2020-01-12 11:09:14 +01:00
parent 5e2e3411a5
commit e049de5f7c
1 changed files with 8 additions and 0 deletions
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8
package/grpc/grpc.mk
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@ -48,6 +48,14 @@ GRPC_CFLAGS += -O0
GRPC_CXXFLAGS += -O0
endif
# Toolchains older than gcc5 will fail to compile with -0s due to:
# error: failure memory model cannot be stronger than success memory model for
# '__atomic_compare_exchange', so we use -O2 in these cases
ifeq ($(BR2_TOOLCHAIN_GCC_AT_LEAST_5):$(BR2_OPTIMIZE_S),:y)
GRPC_CFLAGS += -O2
GRPC_CXXFLAGS += -O2
endif
GRPC_CONF_OPTS += \
-DCMAKE_C_FLAGS="$(GRPC_CFLAGS)" \
-DCMAKE_CXX_FLAGS="$(GRPC_CXXFLAGS)"