ifndef LIBCXX
error LIBCXX not configured
endif

ifndef LIBCXXABI
error LIBCXXABI not configured
endif

ifndef LIBUNWIND_BAREMETAL
error LIBUNWIND_BAREMETAL not configured
endif

ifndef LIBUNWIND
error LIBUNWIND not configured
endif

include_rules

COMMON_FLAGS = -ffunction-sections -fno-strict-aliasing

CFLAGS += $(COMMON_FLAGS)
CXXFLAGS += $(COMMON_FLAGS)

CPPFLAGS += -I@(LIBCXX)/include/c++/v1
CPPFLAGS += -I@(LIBCXXABI)/include

LLVM_LIBS += @(LIBCXXABI)/lib/libc++abi.a

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

#
# 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 \

# Here we define all symbols we want to hide in libsupc++ and libgcc_eh
#
LOCAL_SYMBOLS = \
	--localize-symbol=__stderrp
	--localize-symbol=abort \
	--localize-symbol=calloc \
	--localize-symbol=fflush \
	--localize-symbol=fprintf \
	--localize-symbol=fputc \
	--localize-symbol=fputs \
	--localize-symbol=free \
	--localize-symbol=fwrite \
	--localize-symbol=islower \
	--localize-symbol=isxdigit \
	--localize-symbol=malloc \
	--localize-symbol=memcmp \
	--localize-symbol=memcpy \
	--localize-symbol=memmove \
	--localize-symbol=memset \
	--localize-symbol=posix_memalign \
	--localize-symbol=realloc \
	--localize-symbol=snprintf \
	--localize-symbol=sprintf \
	--localize-symbol=stderr \
	--localize-symbol=strcat \
	--localize-symbol=strcmp \
	--localize-symbol=strcpy \
	--localize-symbol=strlen \
	--localize-symbol=strncmp \
	--localize-symbol=vfprintf \

#
# Symbols we wrap (see unwind.c)
#
EH_SYMBOLS = \
	_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 }'`

: {obj} |> \
	$(LD) $(LD_MARCH) $(KEEP_SYMBOLS) -r %f $(LLVM_LIBS) @(LIBUNWIND)/lib/libunwind.a -o %o |> supc++.tmp

: {obj} |> \
	$(LD) $(LD_MARCH) $(KEEP_SYMBOLS) -r %f $(LLVM_LIBS) @(LIBUNWIND_BAREMETAL)/lib/libunwind.a -o %o |> supc++-baremetal.tmp

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

export OBJCOPY
: supc++.tmp |> $OBJCOPY $(LOCAL_SYMBOLS) $(REDEF_SYMBOLS) %f %o |> supc++.o
: supc++-baremetal.tmp |> $OBJCOPY $(LOCAL_SYMBOLS) $(REDEF_SYMBOLS) %f %o |> supc++-baremetal.o

#
: supc++.o |> !ar |> cxx.a {bin}
: supc++-baremetal.o |> !ar |> cxx-baremetal.a {bin}
: foreach {bin} |> !collect_static |>
: |> !emit_lib_pkg_config |>