ldflags="$ldflags -rdynamic"

		if [ $cc_version -ge 101 ]; then

			flags="$flags -Wno-multichar"

		fi

		if [ $cc_version -ge 110 ]; then

			# vec report defaults to telling where it did loop vectorisation, which is not very important

			flags="$flags -vec-report=0 -wd873"

			# Use c++0x mode so static_assert() is available

			cxxflags="$cxxflags -std=c++0x"

		fi

		has_ipo=`$1 -help ipo | grep '\-ipo'`

		if [ "$enable_lto" != "0" ] && [ -n "$has_ipo" ]; then

			# Use IPO (only if we see IPO exists and is requested)

			flags="$flags -ipo"

			ldflags="$ldflags -ipo $CFLAGS"

		fi

	else

		# Enable some things only for certain GCC versions

		cc_version=`$1 -dumpversion | cut -c 1,3`

			exit 1

		fi

		flags="$flags -Wall -Wno-multichar -Wsign-compare -Wundef"

		flags="$flags -Wwrite-strings -Wpointer-arith"

		flags="$flags -W -Wno-unused-parameter -Wformat=2"

		flags="$flags -Wredundant-decls"

		if [ $enable_assert -eq 0 ]; then

			# Do not warn about unused variables when building without asserts

			flags="$flags -Wno-unused-variable"

		fi

		if [ $cc_version -ge 40 ]; then

			# GCC 4.0+ complains about that we break strict-aliasing.

			#  On most places we don't see how to fix it, and it doesn't

			#  break anything. So disable strict-aliasing to make the

			#  compiler all happy.

			flags="$flags -fno-strict-aliasing"

			ldflags="$ldflags -fno-strict-aliasing"

			# Warn about casting-out 'const' with regular C-style cast.

			#  The preferred way is const_cast<>() which doesn't warn.

			flags="$flags -Wcast-qual"

		fi