+
+ if test "x$enable_compile_optimizations" = "xyes" ||
+ test "x$enable_compile_optimizations" = "xauto" ; then
+ AC_MSG_CHECKING(the optimization flags for this compiler)
+ optCFLAGS=
+ if test "x$CC" = "xgcc" || test "x$GCC" = "xyes" ; then
+ case " $CFLAGS " in
+ *-O*) ;;
+ *) optCFLAGS="$optCFLAGS -O3" ;;
+ esac
+ optCFLAGS="$optCFLAGS -finline-functions -ffast-math -funroll-loops -fno-strict-aliasing"
+
+ GCC_VER=`gcc --version | head -n 1 | sed 's/^[^0-9]*\([^ ]*\).*$/\1/'`
+ GCC_VER_MAJ=`echo $GCC_VER | sed 's/^\(.\).*$/\1/'`
+ if test "x$target_cpu" = "xpowerpc" && test "x$GCC_VER_MAJ" != "x2" ; then
+ # avoid gcc bug #12828, which is fixed in 3.4.0, but this version
+ # isn't propagated enough to desserve an extra check
+
+ # Note that the flag didn't exist before gcc 3.0
+ optCFLAGS="$optCFLAGS -fno-loop-optimize"
+ fi
+ dnl A C_MSG_WARN(GCC_VER_MAJ=$GCC_VER_MAJ)
+ fi
+ AC_MSG_RESULT($optCFLAGS)
+ # Take it only if CFLAGS not explicitly set. Unless the flag was explicitly given
+ if test "x$cflags_set" != "xyes" ; then
+ CFLAGS="$optCFLAGS $CFLAGS"
+ fi
+ fi
+