STDCXX_INCLUDE_DIR := $(call select_from_repositories,include/stdcxx)

INC_DIR += $(STDCXX_INCLUDE_DIR) \
           $(STDCXX_INCLUDE_DIR)/std \
           $(STDCXX_INCLUDE_DIR)/c_std \
           $(STDCXX_INCLUDE_DIR)/c_global

STDCXX_PORT_INCLUDE_DIR := $(call select_from_ports,stdcxx)/include/stdcxx
INC_DIR += $(STDCXX_PORT_INCLUDE_DIR) \
           $(STDCXX_PORT_INCLUDE_DIR)/std \
           $(STDCXX_PORT_INCLUDE_DIR)/c_std \
           $(STDCXX_PORT_INCLUDE_DIR)/c_global

LIBS += libc libm
include $(call select_from_repositories,lib/import/import-libc.mk)

# prevent gcc headers from defining mbstate
CC_OPT += -D_GLIBCXX_HAVE_MBSTATE_T

# use compiler-builtin atomic operations
CC_OPT += -D_GLIBCXX_ATOMIC_BUILTINS_4

# GCC's stddef.h defines the 'max_align_t' type, which is used in the 'cstddef'
# C++ header file. libc's version of stddef.h shadows GCC's version, so it is
# included explicitly here.
CC_OPT += -include $(LIBGCC_INC_DIR)/stddef.h