From a019faaedd5155cfbb851b45a487f4de2ca0903f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ga=C3=ABtan=20Harter?= <gaetan.harter@fu-berlin.de>
Date: Mon, 16 Sep 2019 13:52:56 +0200
Subject: [PATCH] Makefile.include: use an os independant 'relpath'

This should now work on 'osx'.
---
 Makefile.include | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Makefile.include b/Makefile.include
index bae0388d49..8df7939bfe 100644
--- a/Makefile.include
+++ b/Makefile.include
@@ -500,7 +500,8 @@ endif # BUILD_IN_DOCKER
 
 # Rules to check the correctness of thin archives.
 
-relpath = $(shell realpath --relative-to=$(abspath .) $(1))
+# OS independant relpath as 'realpath --relative-to' is not supported on OSx
+relpath = $(shell python3 -c 'import pathlib; print(pathlib.Path("$1").relative_to("$(CURDIR)"))')
 
 # Each ARCHECK file contains all the absolute paths found inside the archive.
 BASELIB_ARCHECKS = $(patsubst %.a,%.a-check,$(filter %.a,$(BASELIBS)))