linux-kernel - [PATCH] ./Makefile: consider PAGER for `make help'

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Message-ID: <gh3630mk2o.fsf@gouders.net>
Date:   Tue, 29 Sep 2020 22:05:01 +0200
From:   Dirk Gouders <dirk@...ders.net>
To:     Masahiro Yamada <masahiroy@...nel.org>,
        Michal Marek <michal.lkml@...kovi.net>
Cc:     linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] ./Makefile: consider PAGER for `make help'

`make help' outputs more than a screenfull of lines.

In case a user has PAGER defined in his environment, she most likely
wants it to be used in such situations.

Signed-off-by: Dirk Gouders <dirk@...ders.net>
---
 Makefile | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Makefile b/Makefile
index 992d24467ca0..ce1b7e83a4c8 100644
--- a/Makefile
+++ b/Makefile
@@ -1531,7 +1531,14 @@ board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)
 board-dirs := $(sort $(notdir $(board-dirs:/=)))
 
 PHONY += help
+ifdef PAGER
+PHONY += _help
 help:
+	$(Q)$(MAKE) _help | $(PAGER)
+_help:
+else
+help:
+endif
 	@echo  'Cleaning targets:'
 	@echo  '  clean		  - Remove most generated files but keep the config and'
 	@echo  '                    enough build support to build external modules'