Use 'uname -m', which in practice returns the processor architecture.

--- psm-3.3/buildflags.mak~	2014-08-20 21:00:18.000000000 +0100
+++ psm-3.3/buildflags.mak	2017-10-22 12:02:12.855291447 +0100
@@ -38,7 +38,7 @@
 endif
 
 export os ?= $(shell uname -s | tr '[A-Z]' '[a-z]')
-export arch := $(shell uname -p | sed -e 's,\(i[456]86\|athlon$$\),i386,')
+export arch := $(shell uname -m | sed -e 's,\(i[456]86\|athlon$$\),i386,')
 
 CC ?= gcc
 
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<tr><td><span title='2024-06-22 17:35:37 +0100'>2024-06-22</span></td><td><a href='/guix/commit/gnu/packages/gnunet.scm?id=894f25bdbd0e6b82beaf699af58f6f7557d3d658'>gnu: gnunet: Update to 0.21.2.</a><span class='msg-avail'>...</span></td><td>Andy Tai</td></tr>
<tr><td><span title='2024-04-18 10:39:49 -0400'>2024-04-18</span></td><td><a href='/guix/commit/gnu/packages/gnunet.scm?id=a69e5e5e47b70e3fe14040142544147fbd9239a1'>gnu: gnurl: Properly deprecate package.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2024-04-06 11:36:10 -0400'>2024-04-06</span></td><td><a href='/guix/commit/gnu/packages/gnunet.scm?id=93ccf08b4a168c0f8beb850f7c856a46c7be5c7e'>gnu: gnurl: Deprecate in favor of curl.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2024-03-31 21:25:50 -0400'>2024-03-31</span></td><td><a href='/guix/commit/gnu/packages/gnunet.scm?id=ea67ee7ed28b181ea65056c0ee92d89d9c33bfcb'>gnu: gnunet-gtk: Update to 0.21.0.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2024-03-31 21:25:50 -0400'>2024-03-31</span></td><td><a href='/guix/commit/gnu/packages/gnunet.scm?id=aedb0879c29e3188645f34c9bea3d6dd9d8087da'>gnu: gnunet: Update to 0.21.1.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2024-03-31 21:25:50 -0400'>2024-03-31</span></td><td><a href='/guix/commit/gnu/packages/gnunet.scm?id=f0698ffb5279ed7747d49b48ef3f8a507916daa5'>gnu: gnurl: Update to 7.72.0.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2024-03-31 21:25:50 -0400'>2024-03-31</span></td><td><a href='/guix/commit/gnu/packages/gnunet.scm?id=b4c2c984d71fdb1166fe292ba8739e0cec0dd712'>gnu: libmicrohttpd: Update to 1.0.1.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2024-03-13 00:38:11 -0400'>2024-03-13</span></td><td><a href='/guix/commit/gnu/packages/gnunet.scm?id=43d6d5e6461d930dda4846279b3d56c97467bc06'>gnu: libextractor: Enable tidy-html support.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2024-03-13 00:38:11 -0400'>2024-03-13</span></td><td><a href='/guix/commit/gnu/packages/gnunet.scm?id=e1e3536ecea9cba7d4be109af438a45caf8d5eae'>gnu: libextractor: Enable RPM support.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2024-03-13 00:38:11 -0400'>2024-03-13</span></td><td><a href='/guix/commit/gnu/packages/gnunet.scm?id=28012e9fe1bbe4c4a29c1842ba2a5d309f802fe9'>gnu: libextractor: Enable apparmor support.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2024-03-13 00:38:11 -0400'>2024-03-13</span></td><td><a href='/guix/commit/gnu/packages/gnunet.scm?id=0d44ac48bbb3b5391a27b9cea1881bdb487dc3b4'>gnu: libextractor: Add autotools inputs.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2024-03-13 00:38:10 -0400'>2024-03-13</span></td><td><a href='/guix/commit/gnu/packages/gnunet.scm?id=dc24ee62eec9406e32e5c2fa88b9a5762ae096fc'>gnu: libextractor: Modernize.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2024-03-13 00:38:10 -0400'>2024-03-13</span></td><td><a href='/guix/commit/gnu/packages/gnunet.scm?id=a2bf7bda4cade6e6b035ab7ad06acdfbf377c7a2'>gnu: libextractor: Update to 1.13.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2023-12-29 10:45:45 +0100'>2023-12-29</span></td><td><a href='/guix/commit/gnu/packages/gnunet.scm?id=f90d6adec787187f7929159e3327c73245d3bbe3'>gnu: gnunet-gtk: Update to 0.20.0.</a><span class='msg-avail'>...</span></td><td>Adam Faiz</td></tr>
<tr><td><span title='2023-12-29 10:44:03 +0100'>2023-12-29</span></td><td><a href='/guix/commit/gnu/packages/gnunet.scm?id=d68517059f12f9adf86adfa3f087ab7d93bc2f15'>gnu: gnunet: Update to 0.20.0.</a><span class='msg-avail'>...</span></td><td>Adam Faiz</td></tr>