AC_DEFUN([AC_PROG_CC_PIE], [

	AC_CACHE_CHECK([whether ${CC-cc} accepts -fPIE], ac_cv_prog_cc_pie, [

		echo 'void f(){}' > conftest.c

		if test -z "`${CC-cc} -fPIE -pie -c conftest.c 2>&1`"; then

			ac_cv_prog_cc_pie=yes

		else

			ac_cv_prog_cc_pie=no

		fi

		rm -rf conftest*

	])

])

AC_DEFUN([COMPILER_FLAGS], [

	with_cflags=""

	if (test "$USE_MAINTAINER_MODE" = "yes"); then

		with_cflags="$with_cflags -Wall -Werror -Wextra"

		with_cflags="$with_cflags -Wno-unused-parameter"

		with_cflags="$with_cflags -Wno-missing-field-initializers"

		with_cflags="$with_cflags -Wdeclaration-after-statement"

		with_cflags="$with_cflags -Wmissing-declarations"

		with_cflags="$with_cflags -Wredundant-decls"

		with_cflags="$with_cflags -Wcast-align"

		with_cflags="$with_cflags -Wswitch-enum"

		with_cflags="$with_cflags -Wformat -Wformat-security"

		with_cflags="$with_cflags -DG_DISABLE_DEPRECATED"

		with_cflags="$with_cflags -DGLIB_VERSION_MIN_REQUIRED=GLIB_VERSION_2_28"

		with_cflags="$with_cflags -DGLIB_VERSION_MAX_ALLOWED=GLIB_VERSION_2_32"

	fi

	AC_SUBST([WARNING_CFLAGS], $with_cflags)

])

AC_DEFUN([MISC_FLAGS], [

	misc_cflags=""

	misc_ldflags=""

	AC_ARG_ENABLE(optimization, AC_HELP_STRING([--disable-optimization],

			[disable code optimization through compiler]), [

		if (test "${enableval}" = "no"); then

			misc_cflags="$misc_cflags -O0"

		fi

	])

	AC_ARG_ENABLE(debug, AC_HELP_STRING([--enable-debug],

			[enable compiling with debugging information]), [

		if (test "${enableval}" = "yes" &&

				test "${ac_cv_prog_cc_g}" = "yes"); then

			misc_cflags="$misc_cflags -g"

		fi

	])

	AC_ARG_ENABLE(pie, AC_HELP_STRING([--enable-pie],

			[enable position independent executables flag]), [

		if (test "${enableval}" = "yes" &&

				test "${ac_cv_prog_cc_pie}" = "yes"); then

			misc_cflags="$misc_cflags -fPIC"

			misc_ldflags="$misc_ldflags -pie -Wl,-z,now"

		fi

	])

	if (test "$enable_coverage" = "yes"); then

		misc_cflags="$misc_cflags --coverage"

		misc_ldflags="$misc_ldflags --coverage"

	fi

	AC_SUBST([MISC_CFLAGS], $misc_cflags)

	AC_SUBST([MISC_LDFLAGS], $misc_ldflags)

])