include_rules

DEFINES = -ffunction-sections -fno-strict-aliasing -g -fPIC
	# drop the standard defines to avoid -nostdinc

export LIBCXX
export LIBCXXABI
export LIBUNWIND_BAREMETAL

INCLUDES += -I$LIBCXX/include/c++/v1
INCLUDES += -I$LIBCXXABI/include

LLVM_LIBS += $LIBCXXABI/lib/libc++abi.a
LLVM_LIBS += $LIBUNWIND_BAREMETAL/lib/libunwind.a

: foreach *.cc |> !cxx |> {supc++}

#
# Prevent symbols of the gcc support libs from being discarded during 'ld -r'
#
KEEP_SYMBOLS = \
	-u __cxa_guard_acquire \
	-u __dynamic_cast \
	-u __cxa_throw_bad_array_new_length \
	-u __cxa_current_exception_type \
	-u _ZTVN10__cxxabiv116__enum_type_infoE \
	-u _ZN10__cxxabiv121__vmi_class_type_infoD0Ev \
	-u _ZTVN10__cxxabiv119__pointer_type_infoE \
	-u _ZTSN10__cxxabiv120__function_type_infoE \

: {supc++} |> $(LD) $(LD_MARCH) $(KEEP_SYMBOLS) -r %f $(LLVM_LIBS) -o %o |> supc++.tmp

#
# Here we define all symbols we want to hide in libsupc++ and libgcc_eh
#
LOCAL_SYMBOLS = \
	--localize-symbol=abort \
	--localize-symbol=calloc \
	--localize-symbol=fputc \
	--localize-symbol=fputs \
	--localize-symbol=free \
	--localize-symbol=fwrite \
	--localize-symbol=malloc \
	--localize-symbol=memcmp \
	--localize-symbol=realloc \
	--localize-symbol=sprintf \
	--localize-symbol=stderr \
	--localize-symbol=__stderrp \
	--localize-symbol=strcat \
	--localize-symbol=strcmp \
	--localize-symbol=strcpy \
	--localize-symbol=strlen \
	--localize-symbol=strncmp \

#
# Symbols we wrap (see unwind.cc)
#
EH_SYMBOLS = \
	_Unwind_Resume \
	_Unwind_Complete \
	_Unwind_DeleteException \

#
# Additional functions for ARM
#
EH_SYMBOLS += \
	__aeabi_unwind_cpp_pr0 \
	__aeabi_unwind_cpp_pr1 \

REDEF_SYMBOLS = `echo $(EH_SYMBOLS) | awk -v RS=' ' '{ print "--redefine-sym "$1"=_cxx_"$1 }'`

export OBJCOPY
: supc++.tmp |> $OBJCOPY $(LOCAL_SYMBOLS) $(REDEF_SYMBOLS) -weaken %f %o |> supc++.o {obj}

: foreach *.c |> !cc |> {obj}

: {obj} |> !ar |> cxx.lib.a $(BASE_DIR)/<base-libs>