Initial PowerPC profile

profiles/arch/ppc/make.defaults

-ARCH=ppc
+CHOST="powerpc-foxkit-linux-musl"
+
+# We definitely use 32-bit ABI.
+ABI_PPC="32"
+IUSE_IMPLICIT="abi_ppc_32"
+
+ARCH="ppc"
+ACCEPT_KEYWORDS="${ARCH}"
+
+# -O2           -> Perform second-level optimisations.
+#                  Not -Os because most/all PPC aren't starved for space.
+# -ggdb         -> Generate GDB debugging information.
+#                  This is used with splitdebug to make -dbg split packages.
+# -mcpu=7450    -> Require a 7450 or higher, or "G4".
+#                  700/G3 uses the g3 profile, overriding this.
+#                  600 series is not supported by Adélie.
+# -maltivec.     -> Use AltiVec floating point extensions.
+#.                  These are always available on 7450+.
+# -fno-omit-... -> Never omit the frame pointer.
+#                  This is crucial for proper debugging.
+# -mfpu=dp_full -> Use hardware for floating point math.
+CFLAGS="-O2 -mlong-double-64 " #-ggdb -mcpu=7450 -maltivec -fno-omit-frame-pointer -mfpu=dp_full"
+CXXFLAGS="${CFLAGS}"
+
+ELIBC="musl"
+
+USE="altivec pam threads"