build
	# Export CFLAGS
	export CFLAGS =

	# Export CXXFLAGS
	export CXXFLAGS = %{CFLAGS}

	# Export LDFLAGS
	export LDFLAGS =

	# Enable optimisation and compile in debugging information
	CFLAGS = -O2 -g

	# Enable all compiler warnings
	CFLAGS += -Wall

	# Fail on any string format security issues
	STRING_FORMAT_SECURITY_CFLAGS = -Werror=format-security
	CFLAGS += %{STRING_FORMAT_SECURITY_CFLAGS}

	# Fortify Source
	CFLAGS += -Wp,-U_FORTIFY_SOURCE -Wp,-D_FORTIFY_SOURCE=3

	# libstc++ Assertions
	CFLAGS += -D_GLIBCXX_ASSERTIONS

	# Build Position Independent Code
	CFLAGS += -fPIC

	# Enable Stack Smashing Protection
	CFLAGS += -fstack-protector-all

	# Enable unwind tables
	CFLAGS += -funwind-tables -fasynchronous-unwind-tables

	# Enable Stack Clash Protection
	CFLAGS += -fstack-clash-protection

	# Tell the compiler where the source will be put
	CFLAGS += -fdebug-prefix-map=%{DIR_SRC}=%{debugsourcedir}

	# Avoid creating temporary files
	CFLAGS += -pipe

	# Arch: x86_64
	CFLAGS_x86_64 = -m64 -march=x86-64-v2 -mtune=generic

	# Enable Control Flow Technology (CET)
	CFLAGS_x86_64 += -fcf-protection=full

	# Arch: aarch64
	CFLAGS_aarch64 = -mbranch-protection=standard

	# Append architecture optimisations
	CFLAGS += %{CFLAGS_%{DISTRO_ARCH}}

	# Enable LTO
	LTO_CFLAGS = -flto=auto -ffat-lto-objects
	CFLAGS += %{LTO_CFLAGS}

	# Optimise linked binaries https://lwn.net/Articles/192624/
	LDFLAGS += -Wl,-O1

	# Only link what we actually need
	LDFLAGS += -Wl,--as-needed

	# Create an ELF "PT_GNU_RELRO" segment header in the object
	LDFLAGS += -Wl,-z,relro

	# When generating an executable or shared library, mark it to tell the
	# dynamic linker to resolve all symbols when the program is started,
	# or when the shared library is linked to using dlopen, instead of
	# deferring function call resolution to the point when the function is
	# first called.
	LDFLAGS += -Wl,-z,now

	# Export default compilers
	export CC  = gcc
	export CXX = g++

	# Show libtool where to find any libraries
	export LT_SYS_LIBRARY_PATH = %{libdir}:
end