Subzero: Suppress a warning as a result of an updated clang.

Makefile.standalone

 # The following variables will likely need to be modified, depending on where
 # and how you built LLVM & Clang. They can be overridden in a command-line
 # invocation of make, like:
 #
 #   make LLVM_SRC_PATH=<path> LIBCXX_INSTALL_PATH=<path> CLANG_PATH=<path> \
 #        PNACL_BIN_PATH=<path> ...
 #
 
 # LLVM_SRC_PATH is the path to the root of the checked out source code. This
 # directory should contain the configure script, the include/ and lib/
@@ skipping 247 matching lines @@
   -fno-exceptions $(OPTLEVEL) $(ASSERTIONS) -g -pedantic \
   $(LLVM_EXTRA_WARNINGS) $(CXX_EXTRA) -MP -MD -Werror
 
 ifdef WASM
   BASE_CXXFLAGS := $(BASE_CXXFLAGS) $(V8_CXXFLAGS) -DALLOW_WASM=1
   OBJDIR := $(OBJDIR)+Wasm
 else
   BASE_CXXFLAGS := $(BASE_CXXFLAGS) -DALLOW_WASM=0
 endif
 
+# TODO(stichnot,jpp): Restructure static fields in template classes to avoid
+# needing -Wno-undefined-var-template .
 CXXFLAGS := $(LLVM_CXXFLAGS) $(BASE_CXXFLAGS) $(CXX_DEFINES) $(HOST_FLAGS) \
-  $(STDLIB_FLAGS)
+  $(STDLIB_FLAGS) -Wno-undefined-var-template
 SB_CXXFLAGS := $(SB_LLVM_CXXFLAGS) $(BASE_CXXFLAGS) $(BASE_CXX_DEFINES) \
                -Wno-unknown-pragmas -I$(NACL_ROOT) -I$(NACL_ROOT)/..
 
 LDFLAGS := $(HOST_FLAGS) -L$(LIBCXX_INSTALL_PATH)/lib -Wl,--gc-sections \
   $(LD_EXTRA) $(STDLIB_FLAGS)
 # Not specifying -Wl,--gc-sections but instead doing bitcode linking GC w/ LTO.
 SB_LDFLAGS := $(LINKOPTLEVEL) $(LD_EXTRA)
 
 # List the target-specific source files first, which generally take longer to
 # compile, in the hope of improving parallel build time.
@@ skipping 327 matching lines @@
 NONSFI_LOADER_X8632 = \
   $(NACL_ROOT)/scons-out/opt-linux-x86-32/obj/src/nonsfi/loader/nonsfi_loader
 NONSFI_LOADER_ARM32 = \
   $(NACL_ROOT)/scons-out/opt-linux-arm/obj/src/nonsfi/loader/nonsfi_loader
 SBTC_LIBFILE = $(SB_LLVM_PATH)/lib/libLLVMSupport.a
 SPEC_SAMPLE_PEXE = $(NACL_ROOT)/tests/spec2k/176.gcc/gcc.opt.stripped.pexe
 
 exists-nonsfi-x8632:
         @if [ ! -f $(NONSFI_LOADER_X8632) ] ; then \
           echo "Missing file $(NONSFI_LOADER_X8632)"; \
-          echo "Consider running 'scons nonsfi_loader'" \
+          echo "Consider running './scons nonsfi_loader'" \
                "in the native_client directory."; \
           exit 1 ; \
         fi
 
 exists-nonsfi-arm32:
         @if [ ! -f $(NONSFI_LOADER_ARM32) ] ; then \
           echo "Missing file $(NONSFI_LOADER_ARM32)"; \
-          echo "Consider running 'scons platform=arm32 nonsfi_loader'" \
+          echo "Consider running './scons platform=arm nonsfi_loader'" \
                "in the native_client directory."; \
           exit 1 ; \
         fi
 
 exists-sbtc:
         @if [ ! -f $(SBTC_LIBFILE) ] ; then \
           echo "Missing file $(SBTC_LIBFILE)"; \
           echo "Consider running 'toolchain_build_pnacl.py --build-sbtc'."; \
           exit 1 ; \
         fi
 
 exists-spec:
         @if [ ! -f $(SPEC_SAMPLE_PEXE) ] ; then \
           echo "Missing file $(SPEC_SAMPLE_PEXE)"; \
           echo "Consider running" \
-               "'run_all.sh BuildBenchmarks 0 SetupPnaclX8632Opt'" \
+               "'./run_all.sh BuildBenchmarks 0 SetupPnaclX8632Opt'" \
                "in the native_client/tests/spec2k directory."; \
           exit 1 ; \
         fi
 
 check-presubmit presubmit: exists-nonsfi-x8632 exists-nonsfi-arm32 \
   exists-sbtc exists-spec
 # Make sure clang-format gets run.
         +make -f Makefile.standalone format
 # Verify MINIMAL build, plus proper usage of REQUIRES in lit tests.
         +make -f Makefile.standalone \
@@ skipping 119 matching lines @@
 
 help-check-xtest:
         @cat Makefile.standalone-help/check-xtest.txt
 
 clean:
         rm -rf pnacl-sz *.o $(foreach nexe,$(NEXES),$(notdir $(nexe))) \
           $(OBJDIR) $(SB_OBJDIR) $(SBB_OBJDIR) build/*.bloat.json
 
 clean-all: clean
         rm -rf build/ crosstest/Output/