linux_CFLAGS=-pipe -std=$(C_STANDARD)
linux_CXXFLAGS=-pipe -std=$(CXX_STANDARD)

ifneq ($(LTO),)
linux_CFLAGS += -flto
linux_CXXFLAGS += -flto
linux_LDFLAGS += -flto

linux_AR = $(host_toolchain)gcc-ar
linux_NM = $(host_toolchain)gcc-nm
linux_RANLIB = $(host_toolchain)gcc-ranlib
endif

linux_release_CFLAGS=-O2
linux_release_CXXFLAGS=$(linux_release_CFLAGS)

linux_debug_CFLAGS=-O1 -g
linux_debug_CXXFLAGS=$(linux_debug_CFLAGS)

# https://gcc.gnu.org/onlinedocs/libstdc++/manual/debug_mode.html
linux_debug_CPPFLAGS=-D_GLIBCXX_DEBUG -D_GLIBCXX_DEBUG_PEDANTIC

# https://libcxx.llvm.org/Hardening.html
linux_debug_CPPFLAGS+=-D_LIBCPP_HARDENING_MODE=_LIBCPP_HARDENING_MODE_DEBUG

ifeq (86,$(findstring 86,$(build_arch)))
i686_linux_CC=gcc -m32
i686_linux_CXX=g++ -m32
i686_linux_AR=ar
i686_linux_RANLIB=ranlib
i686_linux_NM=nm
i686_linux_STRIP=strip

x86_64_linux_CC=gcc -m64
x86_64_linux_CXX=g++ -m64
x86_64_linux_AR=ar
x86_64_linux_RANLIB=ranlib
x86_64_linux_NM=nm
x86_64_linux_STRIP=strip
else
i686_linux_CC=$(default_host_CC) -m32
i686_linux_CXX=$(default_host_CXX) -m32
x86_64_linux_CC=$(default_host_CC) -m64
x86_64_linux_CXX=$(default_host_CXX) -m64
endif
linux_cmake_system=Linux