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dnl Turn on the additional warnings last, so -Werror doesn't affect other tests.
AC_DEFUN([IDT_COMPILE_WARNINGS],[
if test -f $srcdir/autogen.sh; then
default_compile_warnings="error"
else
default_compile_warnings="no"
fi
AC_ARG_WITH(compile-warnings,
AS_HELP_STRING([--with-compile-warnings=@<:@no/yes/error@:>@],
[Compiler warnings]),
[enable_compile_warnings="$withval"],
[enable_compile_warnings="$default_compile_warnings"])
warnCFLAGS=
if test "x$GCC" != xyes; then
enable_compile_warnings=no
fi
warning_flags=
realsave_CFLAGS="$CFLAGS"
case "$enable_compile_warnings" in
no)
warning_flags=
;;
yes)
warning_flags="-Wall -Wunused -Wmissing-prototypes -Wmissing-declarations"
;;
maximum|error)
warning_flags="-Wall -Wunused -Wchar-subscripts -Wmissing-declarations -Wmissing-prototypes -Wnested-externs -Wpointer-arith"
CFLAGS="$warning_flags $CFLAGS"
for option in -Wno-sign-compare -Wno-pointer-sign; do
SAVE_CFLAGS="$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)
WARN_CFLAGS="$warning_flags"
AC_SUBST(WARN_CFLAGS)
])
|
