From 6d4fbd86fcc14c50a7460e77bf589c7ada94d76c Mon Sep 17 00:00:00 2001
From: John-Mark Gurney <jmg@funkthat.com>
Date: Thu, 15 Sep 2022 20:57:50 -0700
Subject: [PATCH] attempt to autodetect location using a few popular ones..

---
 setup.py | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/setup.py b/setup.py
index 617c07d..7994e38 100644
--- a/setup.py
+++ b/setup.py
@@ -38,6 +38,13 @@ except ImportError:
 
 # Use a provided libarchive else default to hard-coded path.
 libarchivePrefix = environ.get('LIBARCHIVE_PREFIX')
+if libarchivePrefix is None:
+    import pathlib
+    for i in [ '/usr', '/usr/local', '/opt/local' ]:
+        libdir = pathlib.Path(i) / 'lib'
+        if list(libdir.glob('libarchive.*')):
+            libarchivePrefix = i
+            break
 
 if libarchivePrefix:
     includePath = libarchivePrefix + '/include'