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=037615cf7163bdde53d44ddd31fadcc355201c54'>root</a>/<a href='/guix/log/gnu?id=037615cf7163bdde53d44ddd31fadcc355201c54'>gnu</a>/<a href='/guix/log/gnu/services?id=037615cf7163bdde53d44ddd31fadcc355201c54'>services</a>/<a href='/guix/log/gnu/services/getmail.scm?id=037615cf7163bdde53d44ddd31fadcc355201c54'>getmail.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/gnu/services/getmail.scm?id=037615cf7163bdde53d44ddd31fadcc355201c54&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2020-01-30 15:27:31 -0800'>2020-01-30</span></td><td><a href='/guix/commit/gnu/services/getmail.scm?id=9ea68dd7be9627d2a6d8bbc21065e075439d15de'>services: getmail: Fix spelling of "address".</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/getmail (getmail-retriever-configuration): Fix typo.
</span></span></td><td>Vagrant Cascadian</td></tr>
<tr><td><span title='2020-01-20 19:13:16 +0000'>2020-01-20</span></td><td><a href='/guix/commit/gnu/services/getmail.scm?id=c8defb2b2a4daf370497e6be1047a1fcf82143e1'>services: getmail: Adjust a couple of default configuration values.</a><span class='msg-avail'>...<span class='msg-tooltip'>Change the message-log-syslog and message-log-verbose configuration values to
match the Getmail defaults.

* gnu/services/getmail.scm (getmail-options-configuration): Change defaults
for message-log-syslog and message-log-verbose
* doc/guix.texi (Mail Services): Update the Getmail documentation accordingly.
</span></span></td><td>Christopher Baines</td></tr>
<tr><td><span title='2020-01-20 19:09:00 +0000'>2020-01-20</span></td><td><a href='/guix/commit/gnu/services/getmail.scm?id=2e1a31487122aa841d513c212f65d47294a927a6'>services: getmail: Fix some configuration documentation strings.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/getmail.scm (getmail-retriever-configuration): Specify proper
documentation strings for some of the fields.
* doc/guix.texi (Mail Services): Update the documentation accordingly.
</span></span></td><td>Christopher Baines</td></tr>
<tr><td><span title='2020-01-20 19:01:23 +0000'>2020-01-20</span></td><td><a href='/guix/commit/gnu/services/getmail.scm?id=147a7f1fd2c33058600eda17153911cd36cc9c3f'>services: getmail: Fix stopping the shepherd service.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/getmail.scm (getmail-shepherd-services): Add a stop component
to the shepherd services.
</span></span></td><td>Christopher Baines</td></tr>
<tr><td><span title='2019-10-18 07:53:55 +0000'>2019-10-18</span></td><td><a href='/guix/commit/gnu/services/getmail.scm?id=99190575a0a37115a11e561ae8a9bbdb5398dfd8'>Fix documentation of delete_after in the getmail service.</a><span class='msg-avail'>...<span class='msg-tooltip'>* doc/guix.texi (Getmail service): Remove the word `not'.
* gnu/services/getmail.scm (getmail-options-configuration): Ditto.
</span></span></td><td>Florian Pelz</td></tr>
<tr><td><span title='2019-05-31 20:22:20 +0100'>2019-05-31</span></td><td><a href='/guix/commit/gnu/services/getmail.scm?id=f6b0e1f8ff6a6459d7d39238ced165f4caa988fe'>services: Add getmail.</a><span class='msg-avail'>...<span class='msg-tooltip'>Getmail is a mail retriever written in Python, this commit adds a service-type
to run getmail. I'm looking at this, as it's a convinient way of getting
mailing list messages in to Patchwork.

I initially tried putting this in the (gnu services mail) module, but due to
also trying to use the define-configuration pattern, it conflicted with the
dovecot service.

* gnu/services/getmail.scm: New file.
* gnu/local.mk: Add it.
* gnu/tests/mail.scm (%getmail-os, %test-getmail): New variables.
(run-getmail-test): New procedure.
</span></span></td><td>Christopher Baines</td></tr>