John Levon <[email protected]> added the comment:
Yep, this is an annoying misfeature of Sun Studio. There is no way to
affect this behaviour. There is a Sun Studio bug filed for this
(-errwarn should affect this behaviour, but it doesn't).
Here's some example m4 that libvirt uses to check this case properly:
AC_DEFUN([gl_COMPILER_FLAGS],
[AC_MSG_CHECKING(whether compiler accepts $1)
AC_SUBST(COMPILER_FLAGS)
ac_save_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS $1"
AC_TRY_LINK([], [], has_option=yes, has_option=no,)
echo 'int x;' >conftest.c
$CC $CFLAGS -c conftest.c 2>conftest.err
ret=$?
if test $ret != 0 -o -s conftest.err -o $has_option = "no"; then
AC_MSG_RESULT(no)
else
AC_MSG_RESULT(yes)
COMPILER_FLAGS="$COMPILER_FLAGS $1"
fi
CFLAGS="$ac_save_CFLAGS"
rm -f conftest*
])
----------
nosy: +movement
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<http://bugs.python.org/issue877121>
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