Adapted from Debian: https://sources.debian.org/patches/sqlite3/3.32.3-1/20-hurd-locking-style.patch
Upstream status: Not upstreamed.

This patch is needed to get offloading to work.

Sqlite can use simple file locking mode, but that does not work for the Hurd;
a second sqlite process fails with a "locking protocol" error.

See also: https://bugs.debian.org/529734.

diff -purN sqlite-autoconf-3310100/sqlite3.c sqlite-autoconf-3310100-/sqlite3.c
--- sqlite-autoconf-3310100/sqlite3.c	2020-01-27 21:25:19.000000000 +0100
+++ sqlite-autoconf-3310100-/sqlite3.c	2020-07-01 11:50:13.768333806 +0200
@@ -33189,7 +33189,7 @@ SQLITE_PRIVATE const char *sqlite3Opcode
 # include <sys/mman.h>
 #endif
 
-#if SQLITE_ENABLE_LOCKING_STYLE
+#if SQLITE_ENABLE_LOCKING_STYLE || defined(__GNU__)
 /* # include <sys/ioctl.h> */
 # include <sys/file.h>
 # include <sys/param.h>
@@ -35676,7 +35676,7 @@ static int dotlockClose(sqlite3_file *id
 **
 ** Omit this section if SQLITE_ENABLE_LOCKING_STYLE is turned off
 */
-#if SQLITE_ENABLE_LOCKING_STYLE
+#if SQLITE_ENABLE_LOCKING_STYLE || defined(__GNU__)
 
 /*
 ** Retry flock() calls that fail with EINTR
@@ -38586,7 +38586,7 @@ IOMETHODS(
   0                         /* xShmMap method */
 )
 
-#if SQLITE_ENABLE_LOCKING_STYLE
+#if SQLITE_ENABLE_LOCKING_STYLE || defined(__GNU__)
 IOMETHODS(
   flockIoFinder,            /* Finder function name */
   flockIoMethods,           /* sqlite3_io_methods object name */
@@ -41142,6 +41142,8 @@ SQLITE_API int sqlite3_os_init(void){
     UNIXVFS("unix",          autolockIoFinder ),
 #elif OS_VXWORKS
     UNIXVFS("unix",          vxworksIoFinder ),
+#elif defined(__GNU__)
+    UNIXVFS("unix",          flockIoFinder ),
 #else
     UNIXVFS("unix",          posixIoFinder ),
 #endif
@@ -41151,7 +41153,7 @@ SQLITE_API int sqlite3_os_init(void){
 #if OS_VXWORKS
     UNIXVFS("unix-namedsem", semIoFinder ),
 #endif
-#if SQLITE_ENABLE_LOCKING_STYLE || OS_VXWORKS
+#if SQLITE_ENABLE_LOCKING_STYLE || OS_VXWORKS || defined(__GNU__)
     UNIXVFS("unix-posix",    posixIoFinder ),
 #endif
 #if SQLITE_ENABLE_LOCKING_STYLE
href='/guix/log/?id=93fd21717f4cbc4d416b354e6a77c7f8e3bdfe58'>root</a>/<a href='/guix/log/gnu?id=93fd21717f4cbc4d416b354e6a77c7f8e3bdfe58'>gnu</a>/<a href='/guix/log/gnu/build?id=93fd21717f4cbc4d416b354e6a77c7f8e3bdfe58'>build</a>/<a href='/guix/log/gnu/build/linux-modules.scm?id=93fd21717f4cbc4d416b354e6a77c7f8e3bdfe58'>linux-modules.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/build/linux-modules.scm?id=93fd21717f4cbc4d416b354e6a77c7f8e3bdfe58&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2023-10-15 02:00:00 +0200'>2023-10-15</span></td><td><a href='/guix/commit/gnu/build/linux-modules.scm?id=47e265af75141f6ffb557cf6c41a02a05ec82ccb'>linux-modules: Fix module dependency loading.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/build/linux-modules.scm (dot-ko): Make COMPRESSION optional,
as expected by callers RECURSIVE-MODULE-DEPENDENCIES and
LOAD-LINUX-MODULE*.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2022-11-15 12:16:43 +0100'>2022-11-15</span></td><td><a href='/guix/commit/gnu/build/linux-modules.scm?id=afbd4d8470ad2e0b3bd5dd84b983bb343b4451f9'>linux-modules: Add 'load-pci-device-database'.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/build/linux-modules.scm (read-pci-device-database)
(load-pci-device-database): New procedures.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2022-11-15 12:16:42 +0100'>2022-11-15</span></td><td><a href='/guix/commit/gnu/build/linux-modules.scm?id=655fb8feacfcb16da784ad88201663bb6fb566e4'>linux-modules: Add support for listing PCI devices.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/build/linux-modules.scm (&lt;pci-device&gt;): New record type.
(pci-device-class-predicate, storage-pci-device?, network-pci-device?)
(display-pci-device?, pci-devices?): New procedures.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2021-12-16 12:53:52 -0500'>2021-12-16</span></td><td><a href='/guix/commit/gnu/build/linux-modules.scm?id=13f13554433c9dd47503131107dfbdd8a8031832'>linux-modules: Ignore EINVAL in ‘modprobe’ mode.</a><span class='msg-avail'>...<span class='msg-tooltip'>Loading the framebuffer-coreboot module simply fails with EINVAL on a
non-Corebooted system.  Crashing the system with a kernel panic is not
a reasonable reaction to loading valid modules on unsupported hardware.
The kernel should log an error, which the user is expected to see.

Bogus module names will still be fatally reported by linux-modules.drv.

* gnu/build/linux-modules.scm (load-linux-module*):
Ignore EINVAL errors when operating recursively.
</span></span></td><td>Tobias Geerinckx-Rice via Guix-patches via</td></tr>