linux-kernel - [PATCH v2] kconfig: Update all declared targets

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Message-Id: <20230111-kconfig-v2-1-b000fb6bc902@pefoley.com>
Date:   Thu, 12 Jan 2023 23:23:59 -0500
From:   Peter Foley <pefoley2@...oley.com>
To:     Masahiro Yamada <masahiroy@...nel.org>
Cc:     linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org,
        Peter Foley <pefoley2@...oley.com>
Subject: [PATCH v2] kconfig: Update all declared targets

Currently qconf-cfg.sh is the only script that touches the "-bin"
target, even though all of the conf_cfg rules declare that they do.
Make the recipe unconditionally touch all declared targets to avoid
incompatibilities with upcoming versions of GNU make:
https://lists.gnu.org/archive/html/info-gnu/2022-10/msg00008.html

e.g.
scripts/kconfig/Makefile:215: warning: pattern recipe did not update peer target 'scripts/kconfig/nconf-bin'.
scripts/kconfig/Makefile:215: warning: pattern recipe did not update peer target 'scripts/kconfig/mconf-bin'.
scripts/kconfig/Makefile:215: warning: pattern recipe did not update peer target 'scripts/kconfig/gconf-bin'.

Signed-off-by: Peter Foley <pefoley2@...oley.com>
---
Changes in v2:
- Update pattern rule to touch -bin instead of each script.
- Add missing gitignore entries.
- Link to v1: https://lore.kernel.org/r/20230111-kconfig-v1-1-a921f03670f0@pefoley.com
---
 scripts/kconfig/.gitignore | 2 +-
 scripts/kconfig/Makefile   | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/scripts/kconfig/.gitignore b/scripts/kconfig/.gitignore
index c8a3f9cd52f0..f8bdf0cf4662 100644
--- a/scripts/kconfig/.gitignore
+++ b/scripts/kconfig/.gitignore
@@ -3,5 +3,5 @@
 /[gmnq]conf
 /[gmnq]conf-cflags
 /[gmnq]conf-libs
-/qconf-bin
+/[gmnq]conf-bin
 /qconf-moc.cc
diff --git a/scripts/kconfig/Makefile b/scripts/kconfig/Makefile
index 0b1d15efaeb0..af1c96198f49 100644
--- a/scripts/kconfig/Makefile
+++ b/scripts/kconfig/Makefile
@@ -209,7 +209,7 @@ $(obj)/gconf: | $(obj)/gconf-libs
 $(obj)/gconf.o: | $(obj)/gconf-cflags
 
 # check if necessary packages are available, and configure build flags
-cmd_conf_cfg = $< $(addprefix $(obj)/$*conf-, cflags libs bin)
+cmd_conf_cfg = $< $(addprefix $(obj)/$*conf-, cflags libs bin); touch $(obj)/$*conf-bin
 
 $(obj)/%conf-cflags $(obj)/%conf-libs $(obj)/%conf-bin: $(src)/%conf-cfg.sh
 	$(call cmd,conf_cfg)

---
base-commit: e8f60cd7db24f94f2dbed6bec30dd16a68fc0828
change-id: 20230111-kconfig-e59c6154f506

Best regards,
-- 
Peter Foley <pefoley2@...oley.com>