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dnl GNOME_COMPILE_WARNINGS
dnl Turn on many useful compiler warnings
dnl For now, only works on GCC
AC_DEFUN([GNOME_COMPILE_WARNINGS],[
AC_ARG_ENABLE(compile-warnings,
[ --enable-compile-warnings=[no/minimum/yes] Turn on compiler warnings.],,enable_compile_warnings=minimum)
AC_ARG_ENABLE(warn-unused,
[ --enable-warn-unused Warn about unused variables and parameters],,
enable_warn_unused=no)
AC_MSG_CHECKING(what "unused" warning flags to use)
wunusedCFLAGS=
if test "x$enable_warn_unused" = xyes ; then
wunusedCFLAGS='-Wunused'
else
wunusedCFLAGS='-Wno-unused'
fi
AC_MSG_RESULT($wunusedCFLAGS)
AC_MSG_CHECKING(what warning flags to pass to the C compiler)
warnCFLAGS=
if test "x$enable_compile_warnings" != "xno"; then
if test "x$GCC" = "xyes"; then
case " $CFLAGS " in
*[\ \ ]-Wall[\ \ ]*) ;;
*) warnCFLAGS="-Wall" ;;
esac
if test "x$enable_compile_warnings" = "xyes"; then
warnCFLAGS="$warnCFLAGS -W $wunusedCFLAGS -Wmissing-prototypes -Wmissing-declarations -Wpointer-arith"
fi
fi
fi
AC_MSG_RESULT($warnCFLAGS)
AC_ARG_ENABLE(iso-c,
[ --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($complCFLAGS)
CFLAGS="$CFLAGS $warnCFLAGS $complCFLAGS"
])
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