Fix *SAN compilation
diff --git a/templates/Makefile.template b/templates/Makefile.template
index 5db2c4c..b52354c 100644
--- a/templates/Makefile.template
+++ b/templates/Makefile.template
@@ -165,6 +165,12 @@
CXX11_CHECK_CMD = $(CXX) -std=c++11 -o $(TMPOUT) -c test/build/c++11.cc
HAS_CXX11 = $(shell $(CXX11_CHECK_CMD) 2> /dev/null && echo true || echo false)
+ CHECK_NO_SHIFT_NEGATIVE_VALUE_CMD = $(CC) -std=c99 -Wno-shift-negative-value -o $(TMPOUT) -c test/build/empty.c
+ HAS_NO_SHIFT_NEGATIVE_VALUE = $(shell $(CHECK_NO_SHIFT_NEGATIVE_VALUE_CMD) 2> /dev/null && echo true || echo false)
+ ifeq ($(HAS_NO_SHIFT_NEGATIVE_VALUE),true)
+ W_NO_SHIFT_NEGATIVE_VALUE=-Wno-shift-negative-value
+ endif
+
# The HOST compiler settings are used to compile the protoc plugins.
# In most cases, you won't have to change anything, but if you are
# cross-compiling, you can override these variables from GNU make's
@@ -1438,7 +1444,7 @@
$(LIB${lib.name.upper()}_OBJS): CXXFLAGS := -Ithird_party/boringssl/include $(CXXFLAGS) -fvisibility=hidden
$(LIB${lib.name.upper()}_OBJS): CPPFLAGS += -DOPENSSL_NO_ASM -D_GNU_SOURCE
% elif lib.zlib:
- $(LIB${lib.name.upper()}_OBJS): CFLAGS := $(CFLAGS) -Wno-sign-conversion -Wno-conversion -Wno-unused-value -Wno-implicit-function-declaration -Wno-shift-negative-value -fvisibility=hidden
+ $(LIB${lib.name.upper()}_OBJS): CFLAGS := $(CFLAGS) -Wno-sign-conversion -Wno-conversion -Wno-unused-value -Wno-implicit-function-declaration $(W_NO_SHIFT_NEGATIVE_VALUE) -fvisibility=hidden
% else:
% endif