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linux_CFLAGS=-pipe -std=$(C_STANDARD)
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linux_CXXFLAGS=-pipe -std=$(CXX_STANDARD)
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ifneq ($(LTO),)
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linux_AR = $(host_toolchain)gcc-ar
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linux_NM = $(host_toolchain)gcc-nm
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linux_RANLIB = $(host_toolchain)gcc-ranlib
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endif
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linux_release_CFLAGS=-O2
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linux_release_CXXFLAGS=$(linux_release_CFLAGS)
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linux_debug_CFLAGS=-O1 -g
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linux_debug_CXXFLAGS=$(linux_debug_CFLAGS)
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# https://gcc.gnu.org/onlinedocs/libstdc++/manual/debug_mode.html
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linux_debug_CPPFLAGS=-D_GLIBCXX_DEBUG -D_GLIBCXX_DEBUG_PEDANTIC
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# https://libcxx.llvm.org/Hardening.html
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linux_debug_CPPFLAGS+=-D_LIBCPP_HARDENING_MODE=_LIBCPP_HARDENING_MODE_DEBUG
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ifeq (86,$(findstring 86,$(build_arch)))
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i686_linux_CC=gcc -m32
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i686_linux_CXX=g++ -m32
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i686_linux_AR=ar
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i686_linux_RANLIB=ranlib
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i686_linux_NM=nm
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i686_linux_STRIP=strip
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x86_64_linux_CC=gcc -m64
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x86_64_linux_CXX=g++ -m64
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x86_64_linux_AR=ar
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x86_64_linux_RANLIB=ranlib
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x86_64_linux_NM=nm
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x86_64_linux_STRIP=strip
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else
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i686_linux_CC=$(default_host_CC) -m32
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i686_linux_CXX=$(default_host_CXX) -m32
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x86_64_linux_CC=$(default_host_CC) -m64
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x86_64_linux_CXX=$(default_host_CXX) -m64
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endif
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linux_cmake_system=Linux
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