blob: 6cea2f74e71204be7e1ccb5e6411cf25f459dd02 (
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AC_DEFUN([NM_COMPILER_WARNINGS],
[AC_ARG_ENABLE(more-warnings,
AS_HELP_STRING([--enable-more-warnings], [Maximum compiler warnings]),
set_more_warnings="$enableval",set_more_warnings=yes)
AC_MSG_CHECKING(for more warnings, including -Werror)
if test "$GCC" = "yes" -a "$set_more_warnings" != "no"; then
AC_MSG_RESULT(yes)
CFLAGS="-Wall -Werror -std=gnu89 $CFLAGS"
for option in -Wshadow -Wmissing-declarations -Wmissing-prototypes \
-Wdeclaration-after-statement -Wstrict-prototypes \
-Wfloat-equal -Wno-unused-parameter -Wno-sign-compare \
-fno-strict-aliasing; do
SAVE_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS $option"
AC_MSG_CHECKING([whether gcc understands $option])
AC_TRY_COMPILE([], [],
has_option=yes,
has_option=no,)
if test $has_option = no; then
CFLAGS="$SAVE_CFLAGS"
fi
AC_MSG_RESULT($has_option)
unset has_option
unset SAVE_CFLAGS
done
unset option
else
AC_MSG_RESULT(no)
fi
])
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