~ci-train-bot/unity-settings-daemon/unity-settings-daemon-ubuntu-disco-3643

dnl EXTRA_COMPILE_WARNINGS

dnl Turn on many useful compiler warnings

dnl For now, only works on GCC

AC_DEFUN([EXTRA_COMPILE_WARNINGS],[

    dnl ******************************

    dnl More compiler warnings

    dnl ******************************

    AC_ARG_ENABLE(compile-warnings,

                  AC_HELP_STRING([--enable-compile-warnings=@<:@no/minimum/yes/maximum/error@:>@],

                                 [Turn on compiler warnings]),,

                  [enable_compile_warnings="m4_default([$1],[yes])"])

    warnCFLAGS=

    if test "x$GCC" != xyes; then

	enable_compile_warnings=no

    fi

    warning_flags=

    realsave_CFLAGS="$CFLAGS"

    case "$enable_compile_warnings" in

    no)

	warning_flags=

	;;

    minimum)

	warning_flags="-Wall"

	;;

    yes)

	warning_flags="-Wall -Wmissing-prototypes"

	;;

    maximum|error)

	warning_flags="-Wall -Wmissing-prototypes -Wnested-externs -Wpointer-arith"

	CFLAGS="$warning_flags $CFLAGS"

	for option in -Wno-sign-compare; do

		SAVE_CFLAGS="$CFLAGS"

		CFLAGS="$CFLAGS $option"

		AC_MSG_CHECKING([whether gcc understands $option])

		AC_TRY_COMPILE([], [],

			has_option=yes,

			has_option=no,)

		CFLAGS="$SAVE_CFLAGS"

		AC_MSG_RESULT($has_option)

		if test $has_option = yes; then

		  warning_flags="$warning_flags $option"

		fi

		unset has_option

		unset SAVE_CFLAGS

	done

	unset option

	if test "$enable_compile_warnings" = "error" ; then

	    warning_flags="$warning_flags -Werror"

	fi

	;;

    *)

	AC_MSG_ERROR(Unknown argument '$enable_compile_warnings' to --enable-compile-warnings)

	;;

    esac

    CFLAGS="$realsave_CFLAGS"

    AC_MSG_CHECKING(what warning flags to pass to the C compiler)

    AC_MSG_RESULT($warning_flags)

    AC_ARG_ENABLE(iso-c,

                  AC_HELP_STRING([--enable-iso-c],

                                 [Try to warn if code is not ISO C ]),,

                  [enable_iso_c=no])

    AC_MSG_CHECKING(what language compliance flags to pass to the C compiler)

    complCFLAGS=

    if test "x$enable_iso_c" != "xno"; then

	if test "x$GCC" = "xyes"; then

	case " $CFLAGS " in

	    *[\ \	]-ansi[\ \	]*) ;;

	    *) complCFLAGS="$complCFLAGS -ansi" ;;

	esac

	case " $CFLAGS " in

	    *[\ \	]-pedantic[\ \	]*) ;;

	    *) complCFLAGS="$complCFLAGS -pedantic" ;;

	esac

	fi

    fi

    AC_MSG_RESULT($complCFLAGS)

    WARN_CFLAGS="$warning_flags $complCFLAGS"

    AC_SUBST(WARN_CFLAGS)

])

dnl as-ac-expand.m4 0.2.0                                   -*- autoconf -*-

dnl autostars m4 macro for expanding directories using configure's prefix

dnl (C) 2003, 2004, 2005 Thomas Vander Stichele <thomas at apestaart dot org>

dnl Copying and distribution of this file, with or without modification,

dnl are permitted in any medium without royalty provided the copyright

dnl notice and this notice are preserved.

dnl AS_AC_EXPAND(VAR, CONFIGURE_VAR)

dnl example:

dnl AS_AC_EXPAND(SYSCONFDIR, $sysconfdir)

dnl will set SYSCONFDIR to /usr/local/etc if prefix=/usr/local

AC_DEFUN([AS_AC_EXPAND],

[

  EXP_VAR=[$1]

  FROM_VAR=[$2]

  dnl first expand prefix and exec_prefix if necessary

  prefix_save=$prefix

  exec_prefix_save=$exec_prefix

  dnl if no prefix given, then use /usr/local, the default prefix

  if test "x$prefix" = "xNONE"; then

    prefix="$ac_default_prefix"

  fi

  dnl if no exec_prefix given, then use prefix

  if test "x$exec_prefix" = "xNONE"; then

    exec_prefix=$prefix

  fi

  full_var="$FROM_VAR"

  dnl loop until it doesn't change anymore

  while true; do

    new_full_var="`eval echo $full_var`"

    if test "x$new_full_var" = "x$full_var"; then break; fi

    full_var=$new_full_var

  done

  dnl clean up

  full_var=$new_full_var

  AC_SUBST([$1], "$full_var")

  dnl restore prefix and exec_prefix

  prefix=$prefix_save

  exec_prefix=$exec_prefix_save

])