64 lines
2.3 KiB
Plaintext
64 lines
2.3 KiB
Plaintext
AC_DEFUN([NC_OPTIMISATION],[
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##-------------------------------------------------------------------------
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AX_REQUIRE_DEFINED([AX_APPEND_COMPILE_FLAGS])
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AX_REQUIRE_DEFINED([AC_CANONICAL_HOST])
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AX_REQUIRE_DEFINED([AX_COMPILER_VENDOR])
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AX_COMPILER_VENDOR
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##-------------------------------------------------------------------------
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AC_ARG_ENABLE([lto], [
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AS_HELP_STRING([--enable-lto], [enable link-time optimisation])
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])
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AS_IF([test "x$enable_lto" == "xyes"], [
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AS_IF([test x"${host_os}" == x"mingw32"], [
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AC_ERROR([mingw32 link-time optimisation is currently broken])
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])
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AS_IF([test "x$ax_cv_cxx_compiler_vendor" == "xgnu"], [
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AC_CHECK_TOOLS([RANLIB], [gcc-ranlib ranlib])
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AC_CHECK_TOOLS([AR], [gcc-ar ar])
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AC_CHECK_TOOLS([NM], [gcc-nm nm])
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])
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AX_APPEND_COMPILE_FLAGS([-flto], [], [-Werror])
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AX_APPEND_COMPILE_FLAGS([-fno-fat-lto-objects], [], [-Werror])
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AX_APPEND_LINK_FLAGS([-fuse-linker-plugin], [], [-Werror])
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])
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##-------------------------------------------------------------------------
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AC_CANONICAL_HOST
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AS_CASE([$host_cpu],
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[x86_64], [
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AX_APPEND_COMPILE_FLAGS([-mtune=generic], [], [-Werror])
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AX_APPEND_COMPILE_FLAGS([-msse], [], [-Werror])
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AX_APPEND_COMPILE_FLAGS([-msse2], [], [-Werror])
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],
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[i686], [
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AX_APPEND_COMPILE_FLAGS([-march=prescott], [], [-Werror])
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AX_APPEND_COMPILE_FLAGS([-mtune=generic], [], [-Werror])
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AX_APPEND_COMPILE_FLAGS([-mcmov], [], [-Werror])
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],
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[AC_MSG_WARN([unknown host_cpu])]
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)
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AX_APPEND_COMPILE_FLAGS([-pipe])
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AX_APPEND_COMPILE_FLAGS([-mfpmath=sse], [], [-Werror])
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AX_APPEND_COMPILE_FLAGS([-msahf], [], [-Werror])
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AS_IF([test "x$enable_debugging" != "xyes"], [
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AX_APPEND_COMPILE_FLAGS([-ftree-loop-distribute-patterns], [], [-Werror])
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AX_APPEND_COMPILE_FLAGS([-ftree-loop-if-convert-stores], [], [-Werror])
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AX_APPEND_COMPILE_FLAGS([-ftree-vectorize], [], [-Werror])
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AX_APPEND_COMPILE_FLAGS([-funsafe-loop-optimizations], [], [-Werror])
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# gcc >= 4.8 defaults to enabling stack-protector, we care more about
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# performance than security.
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AX_APPEND_COMPILE_FLAGS([-fno-stack-protector], [], [-Werror])
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])
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])
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