coreutils failed to build when configured with --enable-gcc-warnings and the latest gcc built from git.
Here's a patch to fix that:
From e22ff987e4d3c29b445b3e94de65c633f8a05870 Mon Sep 17 00:00:00 2001 From: Jim Meyering <[email protected]> Date: Tue, 3 May 2016 20:56:20 -0700 Subject: [PATCH] maint: avoid new warning from gcc (GCC) 7.0.0 20160503 (experimental) * src/id.c (main): When configured with --enable-gcc-warnings and using the very latest gcc built from git, building would fail with this: src/id.c:200:8: error: assuming signed overflow does not occur when \ simplifying conditional to constant [-Werror=strict-overflow] bool default_format = (just_user + just_group + just_group_list ^~~~~~~~~~~~~~ Add "U0" to those boolean addends, to avoid the warning by widening the type of the sum. --- src/id.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/id.c b/src/id.c index 38844af..3969337 100644 --- a/src/id.c +++ b/src/id.c @@ -197,7 +197,7 @@ main (int argc, char **argv) if (just_user + just_group + just_group_list + just_context > 1) error (EXIT_FAILURE, 0, _("cannot print \"only\" of more than one choice")); - bool default_format = (just_user + just_group + just_group_list + bool default_format = (0U + just_user + just_group + just_group_list + just_context == 0); if (default_format && (use_real || use_name)) -- 2.8.0-rc2
