Workaround for PATH_MAX usage on the Hurd.

Taken from https://salsa.debian.org/debian/screen/-/blob/master/debian/patches/61-default-PATH_MAX-if-undefined-for-hurd.patch

Description: Set PATH_MAX to 4096 if undefined
 Fixes FTBFS since 4.4.0 on GNU/Hurd. Updated to add one more occurrence for 4.5.0.
Author: Axel Beckert <abe@debian.org>
Bug: https://savannah.gnu.org/bugs/?50089
Updated: 2017-01-18
Updated: 2024-08-30 Update for Screen 5.0.0

diff --git a/screen.h b/screen.h
index 308c365..e71bd7f 100644
--- a/screen.h
+++ b/screen.h
@@ -63,6 +63,22 @@ struct mode {
 #endif
 };

+/*
+ * Define PATH_MAX to 4096 if it's not defined, like on GNU/Hurd
+ */
+
+#ifndef PATH_MAX
+#define PATH_MAX 4096
+#endif
+
+/*
+ * similarly for MAXPATHLEN
+ */
+
+#ifndef MAXPATHLEN
+#define MAXPATHLEN PATH_MAX
+#endif
+

 #include "ansi.h"
 #include "image.h"
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<div class='path'>path: <a href='/guix/log/?id=5a5a5cf31d20c0314d903a38a2c40bfd99f2383e'>root</a>/<a href='/guix/log/tests?id=5a5a5cf31d20c0314d903a38a2c40bfd99f2383e'>tests</a>/<a href='/guix/log/tests/scripts.scm?id=5a5a5cf31d20c0314d903a38a2c40bfd99f2383e'>scripts.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/tests/scripts.scm?id=5a5a5cf31d20c0314d903a38a2c40bfd99f2383e&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2019-03-24 00:13:53 +0100'>2019-03-24</span></td><td><a href='/guix/commit/tests/scripts.scm?id=7b7e4e89c8a1a34e166a2755493e48035e8a78ab'>tests: Add missing import.</a><span class='msg-avail'>...<span class='msg-tooltip'>This is a followup to 22f95e028f038cee342f455dfc55bd32b804907c.

* tests/scripts.scm: Use (guix tests).
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-03-16 18:15:09 +0100'>2019-03-16</span></td><td><a href='/guix/commit/tests/scripts.scm?id=22f95e028f038cee342f455dfc55bd32b804907c'>tests: Add 'with-environment-variable'.</a><span class='msg-avail'>...<span class='msg-tooltip'>* tests/scripts.scm (with-environment-variable): Move to...
* guix/tests.scm (with-environment-variable): ... here.
* tests/build-utils.scm ("wrap-program, one input, multiple calls"):
Use it instead of 'setenv'.
</span></span></td><td>Ludovic Courtès</td></tr>