man-pages: use env from coreutils-native

This is the outcome of investigating the selftest-armhost fail:
https://autobuilder.yoctoproject.org/typhoon/#/builders/127/builds/3028/steps/15/logs/stdio

When man-pages recipe builds on ubuntu 18.04, /usr/bin/env on that is too
old to support -S option, and the outcome is that man-pages quietly
installs nothing, and no packages get created, and the test
that expects the package to exist fails.

(From OE-Core rev: 7bfbaaf2baa54f0abff231cfc263d4d8bc7f732b)

Signed-off-by: Alexander Kanavin <alex@linutronix.de>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-extended/man-pages/man-pages/0001-GNUmakefile-use-env-from-PATH.patch

@@ -0,0 +1,31 @@
+From fbf0544138af02be4d6dd3085e7ecf98ad060bb4 Mon Sep 17 00:00:00 2001
+From: Alexander Kanavin <alex@linutronix.de>
+Date: Wed, 13 Mar 2024 17:30:02 +0100
+Subject: [PATCH] GNUmakefile: use env from PATH
+
+This allows using env from coreutils-native (rather than host env),
+which resolves the problem of missing -S option on distributions
+with much older coreutils such as Ubuntu 18.04.
+
+Once all autobuilder distros are newer than that, this patch
+can be dropped, together with corutils-native dependency.
+
+Upstream-Status: Inappropriate [made for obsolete host distros]
+Signed-off-by: Alexander Kanavin <alex@linutronix.de>
+---
+ GNUmakefile | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/GNUmakefile b/GNUmakefile
+index 1234194..65ba327 100644
+--- a/GNUmakefile
++++ b/GNUmakefile
+@@ -21,7 +21,7 @@
+ ########################################################################
+ 
+ 
+-SHELL := /usr/bin/env
++SHELL := env
+ .SHELLFLAGS := -S bash -Eeuo pipefail -c
+ 
+ 

meta/recipes-extended/man-pages/man-pages_6.06.bb

@@ -19,12 +19,16 @@ LIC_FILES_CHKSUM = "file://README;md5=72cff06b7954222c24d38bc2c41b234e \
                     "
 SRC_URI = "${KERNELORG_MIRROR}/linux/docs/${BPN}/${BP}.tar.gz \
            file://0001-man.ml-do-not-use-dev-stdin.patch \
+           file://0001-GNUmakefile-use-env-from-PATH.patch \
            "
 
 SRC_URI[sha256sum] = "006906e7be81a71c2d347809597bcb91485fa7fa488acdaa79e681ddfa894568"
 
 inherit manpages
 
+# can be dropped when ubuntu 18.04 is not in use anymore
+DEPENDS += "coreutils-native"
+
 MAN_PKG = "${PN}"
 
 PACKAGECONFIG ??= ""