From e17d104c0a6f570e60237333ab5441bf5ca57bba Mon Sep 17 00:00:00 2001
From: Christian Helmuth <christian.helmuth@genode-labs.com>
Date: Mon, 30 Jan 2023 09:55:04 +0100
Subject: [PATCH] mk: restore compatibility to Make 4.1

The leading newline in the _capture function confused _filecontent,
which resulted in empty port hashes.

Fixes regression introduced in 437fd21ba00e3407c984d5602b766a3c73caa6d5
(issue #4725).
---
 repos/base/mk/util.inc | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/repos/base/mk/util.inc b/repos/base/mk/util.inc
index c99de8da5c..817f60bac5 100644
--- a/repos/base/mk/util.inc
+++ b/repos/base/mk/util.inc
@@ -13,11 +13,11 @@ _assert = $(if $1,$1,$(error Error: $2))
 #
 # We must not specify an '=' here. Even though the make documentation states
 # that the omission of '=' should be equivalent to '=', the behaviour is not
-# the same.
+# the same. Note, the result of the 'eval' function is always the empty string
+# and, thus, it can be placed virtually anywhere in a makefile.
 #
 define _capture
-$(eval $2 += $1)
-$1
+$(eval $2 += $1)$1
 endef
 
 #