CXX=clang++-14

ifeq ($(shell which $(CXX)),)
CXX=clang++-13
endif

ifeq ($(shell which $(CXX)),)
CXX=clang++-10
endif

ifeq ($(shell which $(CXX)),)
CXX=clang++
endif

ifeq ($(shell which $(CXX)),)
CXX=g++-9
endif

ifeq ($(shell which $(CXX)),)
CXX=g++
endif

ifeq ($(CXXFLAGS),)
CXXFLAGS=-g -O2
endif

CXXFLAGS+=-Wall -fPIE -Wpedantic -gdwarf-4
LDFLAGS+=-pie

ifeq ($(CXX),g++-9)
CXXFLAGS+=-std=c++17
else
CXXFLAGS+=-std=c++20
endif

ifeq ($(CXX),clang++-10)
LIBS+=-fuse-ld=lld-10 -lstdc++
else ifeq ($(CXX),clang++-14)
LIBS+=-fuse-ld=lld-14 -lc++ -lc++abi
else
LIBS+=-lstdc++ -lstdc++fs
endif

CXXFLAGS+=$(shell pkg-config --cflags qrcodegencpp Magick++ fmt sqlite3)
LIBS+=-lfcgi -lboost_filesystem
LIBS+=$(shell pkg-config --libs qrcodegencpp Magick++ fmt sqlite3) -lSQLiteCpp