Don't hardcode -fpic, some of our architectures need -fPIC.
Don't hardcode -O2.

Index: src/build/Common.gmake
--- src/build/Common.gmake.orig
+++ src/build/Common.gmake
@@ -225,7 +225,6 @@ endif
 ifeq ($(machine),x86_64)
  machine	:= x64
 endif
-CFLAGS +=	-fpic
 ifeq ($(machine),sparc64)
  CFLAGS +=      -D__BIG_ENDIAN__
 endif
@@ -433,7 +432,7 @@ ifdef DEBUG
 else # RELEASE
  # -finline functions breaks the baja build badly.
  # This also means that -O3 won't work either.
- CFLAGS	:= -O2 -fomit-frame-pointer -ffast-math -funroll-loops $(CFLAGS)
+ CFLAGS	:= -fomit-frame-pointer -ffast-math -funroll-loops $(CFLAGS)
 endif
 
 -include targets.mk