Borrowed from Debian
https://sources.debian.org/src/gnupg1/1.4.23-1.1/debian/patches/0006-fix-for-gcc10.patch/

Subject: Fix build with gcc-10
Author: Christoph Biedl <debian.axhn@manchmal.in-ulm.de>
Date: 2021-01-04
Bug: https://dev.gnupg.org/T5215
Bug-Debian: https://bugs.debian.org/957293

--- a/g10/options.h
+++ b/g10/options.h
@@ -29,6 +29,8 @@
 /* Norcraft can't cope with common symbols */
 #if defined (__riscos__) && !defined (INCLUDED_BY_MAIN_MODULE)
 #define EXTERN_UNLESS_MAIN_MODULE extern
+#elif defined (__GNUC__) && __GNUC__ >= 10
+#define EXTERN_UNLESS_MAIN_MODULE __attribute__((__common__))
 #else
 #define EXTERN_UNLESS_MAIN_MODULE
 #endif
--- a/include/cipher.h
+++ b/include/cipher.h
@@ -117,6 +117,8 @@
 #ifndef EXTERN_UNLESS_MAIN_MODULE
 #if defined (__riscos__) && !defined (INCLUDED_BY_MAIN_MODULE)
 #define EXTERN_UNLESS_MAIN_MODULE extern
+#elif defined (__GNUC__) && __GNUC__ >= 10
+#define EXTERN_UNLESS_MAIN_MODULE __attribute__((__common__))
 #else
 #define EXTERN_UNLESS_MAIN_MODULE
 #endif
--- a/include/iobuf.h
+++ b/include/iobuf.h
@@ -72,6 +72,8 @@
 #ifndef EXTERN_UNLESS_MAIN_MODULE
 #if defined (__riscos__) && !defined (INCLUDED_BY_MAIN_MODULE)
 #define EXTERN_UNLESS_MAIN_MODULE extern
+#elif defined (__GNUC__) && __GNUC__ >= 10
+#define EXTERN_UNLESS_MAIN_MODULE __attribute__((__common__))
 #else
 #define EXTERN_UNLESS_MAIN_MODULE 
 #endif
--- a/include/memory.h
+++ b/include/memory.h
@@ -93,6 +93,8 @@
 #ifndef EXTERN_UNLESS_MAIN_MODULE
 #if defined (__riscos__) && !defined (INCLUDED_BY_MAIN_MODULE)
 #define EXTERN_UNLESS_MAIN_MODULE extern
+#elif defined (__GNUC__) && __GNUC__ >= 10
+#define EXTERN_UNLESS_MAIN_MODULE __attribute__((__common__))
 #else
 #define EXTERN_UNLESS_MAIN_MODULE 
 #endif
--- a/include/mpi.h
+++ b/include/mpi.h
@@ -38,6 +38,8 @@
 #ifndef EXTERN_UNLESS_MAIN_MODULE
 #if defined (__riscos__) && !defined (INCLUDED_BY_MAIN_MODULE)
 #define EXTERN_UNLESS_MAIN_MODULE extern
+#elif defined (__GNUC__) && __GNUC__ >= 10
+#define EXTERN_UNLESS_MAIN_MODULE __attribute__((__common__))
 #else
 #define EXTERN_UNLESS_MAIN_MODULE 
 #endif
'>path: <a href='/guix/log/?id=050d9f515808df6c67f7a7d3835d294f353c65b1'>root</a>/<a href='/guix/log/gnu?id=050d9f515808df6c67f7a7d3835d294f353c65b1'>gnu</a>/<a href='/guix/log/gnu/system?id=050d9f515808df6c67f7a7d3835d294f353c65b1'>system</a>/<a href='/guix/log/gnu/system/images?id=050d9f515808df6c67f7a7d3835d294f353c65b1'>images</a>/<a href='/guix/log/gnu/system/images/pinebook-pro.scm?id=050d9f515808df6c67f7a7d3835d294f353c65b1'>pinebook-pro.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/system/images/pinebook-pro.scm?id=050d9f515808df6c67f7a7d3835d294f353c65b1&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2022-09-07 14:24:53 +0200'>2022-09-07</span></td><td><a href='/guix/commit/gnu/system/images/pinebook-pro.scm?id=e917f1242c169f011dedd133515de5e87e267b93'>system: images: Define the platform in image-types.</a><span class='msg-avail'>...<span class='msg-tooltip'>Running the following command where my-pine.scm contains an operating-system
declaration:

guix system image --image-type=pine64-raw my-pine.scm

returns:

guix system: error: package linux-libre-arm64-generic@5.18.19 does not support
x86_64-linux

That's because there's no platform defined in the pine64-raw image-type, hence
the guix system image tries to build the image for the host architecture.

* gnu/system/images/novena.scm (novena-image-type): Use the armv7-linux platform.
* gnu/system/images/pine64.scm (pine64-image-type): Use the aarch64-linux platform.
* gnu/system/images/pinebook-pro.scm (pinebook-pro-image-type): Use the aarch64-linux platform.
* gnu/system/images/rock64.scm (rock64-image-type): Use the aarch64-linux platform.
</span></span></td><td>Mathieu Othacehe</td></tr>