Subzero. WASM. Additional progress.

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 238 matching lines @@
     -Wno-long-long \
     -Wno-maybe-uninitialized \
     -Wno-missing-field-initializers \
     -Wno-unused-parameter \
     -Wwrite-strings
   OBJDIR := $(OBJDIR)+Gplusplus
 endif
 
 BASE_CXXFLAGS := -std=gnu++11 -Wall -Wextra -fno-rtti \
   -fno-exceptions $(OPTLEVEL) $(ASSERTIONS) -g -pedantic \
-  $(LLVM_EXTRA_WARNINGS) $(CXX_EXTRA) -MP -MD
+  $(LLVM_EXTRA_WARNINGS) $(CXX_EXTRA) -MP -MD -Werror
 
 ifdef WASM
-  # The WASM code inherits a lot of V8 code, which does not compile with
-  # -Werror.
   BASE_CXXFLAGS := $(BASE_CXXFLAGS) $(V8_CXXFLAGS) -DALLOW_WASM=1
   OBJDIR := $(OBJDIR)+Wasm
 else
-  BASE_CXXFLAGS := $(BASE_CXXFLAGS) -Werror -DALLOW_WASM=0
+  BASE_CXXFLAGS := $(BASE_CXXFLAGS) -DALLOW_WASM=0
 endif
 
 CXXFLAGS := $(LLVM_CXXFLAGS) $(BASE_CXXFLAGS) $(CXX_DEFINES) $(HOST_FLAGS) \
   $(STDLIB_FLAGS)
 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.
@@ skipping 494 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/