Also, sync a bit with base gcc:
- disable unsafe builtins
- disable -Wpointer-sign in -Wall
- move -fstrict-aliasing to -O3, disable -fstrict-overflow and
-fdelete-null-pointer-checks
- enable -Wsystem-headers
- default to march=i486 on i386
- fix crtsavres on powerpc
- sync sparc64 config
- implement -Wvariable-decl, -Wstack-larger-than-N (alpha, amd64, i386, sparc,
sparc64), -Wtrampolines, -ftrampolines
- default to -fno-ident
- fix -rdynamic by passing -export-dynamic to ld(1)
some bits from Brad, others from me.
tested by myself and jsg@, adastrap now hosted by sthen@ (thanks).
ok jsg@ sthen@
