URL: <https://savannah.gnu.org/support/?110476>
Summary: ar: `u' modifier ignored since `D' is the default (see `U') Project: Autoconf Submitted by: rdiez Submitted on: Thu 22 Apr 2021 07:41:44 AM UTC Category: None Priority: 5 - Normal Severity: 3 - Normal Status: None Privacy: Public Assigned to: None Originator Email: Open/Closed: Open Discussion Lock: Any Operating System: None _______________________________________________________ Details: I recently added a very simple library called libAtmelSoftwareFramework.a to this cross-compilation project of mine: https://github.com/rdiez/JtagDue/blob/master/Project/Makefile.am So I immediately got this warning: ar: `u' modifier ignored since `D' is the default (see `U') This has been a known issue for years. There are many discussions on the Internet. As a new Autoconf user, you have to search for the error message and read here and there. Some people present their opinions about possible ways to fix this problem, with possible caveats. I came up with this workaround for my project: # By default, Automake is using $(AR) $(ARFLAGS), and ARFLAGS defaults to "cru". libAtmelSoftwareFramework_a_AR := $(AR) cr I think it is time for Autoconf to do something about this, instead of letting everybody waste time all over the place. At the very least, this shortcoming should be documented in the Autoconf manual. Failing that, the FAQ page should mention it. The best thing to do is to modify Autoconf somehow in order to prevent this warning. _______________________________________________________ Reply to this item at: <https://savannah.gnu.org/support/?110476> _______________________________________________ Message sent via Savannah https://savannah.gnu.org/