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CHOST="x86_64-foxkit-linux-musl"
# We definitely use 64-bit ABI.
ABI_X86="64"
IUSE_IMPLICIT="abi_x86_64 amd64-linux"
ARCH="x86_64"
ACCEPT_KEYWORDS="${ARCH} amd64" # HACK for using Gentoo ebuilds
# -O2 -> Perform second-level optimisations.
# Not -Os because most/all x86_64 aren't starved for space.
# -ggdb -> Generate GDB debugging information.
# This is used with splitdebug to make -dbg split packages.
# -march=nocona -> Require a "Nocona" Pentium 4 or newer.
# At some point, pending user demand, this may change to core2.
# !!!NOTE!!! If that happens, Nocona P4 will no longer work!
# -mtune=core2 -> Tune for Core 2 processors.
# Most tuning for Core 2 is applicable to * Bridge and *well,
# and makes code more performant on the much larger base of
# those machines.
# -fno-omit-... -> Never omit the frame pointer.
# This is crucial for proper debugging.
# -mfpmath=sse -> Use SSE for all floating point math.
# Since SSE is always available, this knob ensures that GCC
# will take advantage of it over preferring 387 math, which
# can drag down performance on modern x86_64.
CFLAGS="-O2 -ggdb -march=nocona -mtune=core2 -fno-omit-frame-pointer -mfpmath=sse"
CXXFLAGS="${CFLAGS}"
ELIBC="musl"
USE="amd64 amd64-linux pam threads"
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