# set defaults instead redefine
CXXFLAGS ?= -g -Wall -Wextra -Wno-unused-parameter -pedantic
INCFLAGS ?=

## NOTE: The NEEDED_CXXFLAGS are here so that custom CXXFLAGS can be specified at build time
## **without** overwriting the CXXFLAGS which we need in order to build.
## For example, when adding 'hardening flags' to the build
## (e.g. -fstack-protector-strong -Wformat -Werror=format-security), we do not want to remove
## -std=c++11. If you want to remove this variable please do so in a way that allows setting
## custom FLAGS to work at build-time.

# detect proper flag for c++11 support by compilers
CXXVER := $(shell $(CXX) -dumpversion)
ifeq ($(shell expr match $(CXX) 'clang'),5)
	NEEDED_CXXFLAGS += -std=c++11
else ifeq ($(shell expr match ${CXXVER} "4\.[0-9][0-9]"),4) # gcc >= 4.10
	NEEDED_CXXFLAGS += -std=c++11
else ifeq ($(shell expr match ${CXXVER} "4\.[7-9]"),3) # >= 4.7
	NEEDED_CXXFLAGS += -std=c++11 -D_GLIBCXX_USE_NANOSLEEP=1
else ifeq ($(shell expr match ${CXXVER} "4\.6"),3) # = 4.6
	NEEDED_CXXFLAGS += -std=c++0x
else ifeq ($(shell expr match ${CXXVER} "[5-6]\.[0-9]"),3) # gcc >= 5.0
	NEEDED_CXXFLAGS += -std=c++11
else # not supported
	$(error Compiler too old)
endif

NEEDED_CXXFLAGS += -fPIC

ifeq ($(USE_STATIC),yes)
# NOTE: on glibc you will get this warning:
#   Using 'getaddrinfo' in statically linked applications requires at runtime
#   the shared libraries from the glibc version used for linking
  LIBDIR := /usr/lib
  LDLIBS  = $(LIBDIR)/libboost_system.a
  LDLIBS += $(LIBDIR)/libboost_date_time.a
  LDLIBS += $(LIBDIR)/libboost_filesystem.a
  LDLIBS += $(LIBDIR)/libboost_program_options.a
  LDLIBS += $(LIBDIR)/libssl.a
  LDLIBS += $(LIBDIR)/libcrypto.a
  LDLIBS += $(LIBDIR)/libz.a
  LDLIBS += -lpthread -static-libstdc++ -static-libgcc -lrt -ldl
  USE_AESNI := no
else
  LDLIBS = -lcrypto -lssl -lz -lboost_system -lboost_date_time -lboost_filesystem -lboost_program_options -lpthread
endif

# UPNP Support (miniupnpc 1.5 or 1.6)
ifeq ($(USE_UPNP),yes)
  LDFLAGS += -lminiupnpc
  CXXFLAGS += -DUSE_UPNP
endif

IS_64 := $(shell $(CXX) -dumpmachine 2>&1 | $(GREP) -c "64")
ifeq ($(USE_AESNI),yes)
ifeq ($(IS_64),1)
#check if AES-NI is supported by CPU
ifneq ($(shell $(GREP) -c aes /proc/cpuinfo),0)
	CPU_FLAGS = -maes -DAESNI
endif
endif
endif