From b9ece86ffdf6e8fa14c3432e26e126429fffbb17 Mon Sep 17 00:00:00 2001
From: Adam Griffiths <adam.lw.griffiths@gmail.com>
Date: Sat, 26 Sep 2020 00:20:49 +1000
Subject: Add join_paths and join prefix with include/lib dirs (#1383)

Fixes #1380: incorrect usage of CMake paths which causes issues
on some more complicated environments (NixOS especially).
---
 cmake/JoinPaths.cmake | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)
 create mode 100644 cmake/JoinPaths.cmake

(limited to 'cmake')

diff --git a/cmake/JoinPaths.cmake b/cmake/JoinPaths.cmake
new file mode 100644
index 00000000..1de3012e
--- /dev/null
+++ b/cmake/JoinPaths.cmake
@@ -0,0 +1,26 @@
+# This module provides function for joining paths
+# known from most languages
+#
+# Original license:
+# SPDX-License-Identifier: (MIT OR CC0-1.0)
+# Explicit permission given to distribute this module under
+# the terms of the project as described in /LICENSE.rst.
+# Copyright 2020 Jan Tojnar
+# https://github.com/jtojnar/cmake-snips
+#
+# Modelled after Python’s os.path.join
+# https://docs.python.org/3.7/library/os.path.html#os.path.join
+# Windows not supported
+function(join_paths joined_path first_path_segment)
+    set(temp_path "${first_path_segment}")
+    foreach(current_segment IN LISTS ARGN)
+        if(NOT ("${current_segment}" STREQUAL ""))
+            if(IS_ABSOLUTE "${current_segment}")
+                set(temp_path "${current_segment}")
+            else()
+                set(temp_path "${temp_path}/${current_segment}")
+            endif()
+        endif()
+    endforeach()
+    set(${joined_path} "${temp_path}" PARENT_SCOPE)
+endfunction()
-- 
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