This patch was taken from https://gcc.gnu.org/ml/gcc-patches/2015-08/msg00375.html.
It is used by propeller-gcc-4.

Since the 3.0.3 release of gperf (made in May 2007), the generated func
has had the gnu_inline attribute applied to it.  The gcc source however
has not been updated to include that which has lead to a mismatch.

In practice, this hasn't been an issue for two reasons:
(1) Before gcc-5, the default standard was (gnu) C89, and gcc does not
warn or throw an error in this mode.
(2) Starting with gcc-4.8, the compiler driver used to build gcc was
changed to C++, and g++ does not warn or throw an error in this mode.

This error does show up though when using gcc-5 to build gcc-4.7 or
older as then the default is (gnu) C11 and the C compiler driver is
used.  That failure looks like:
In file included from .../gcc-4.7.4/gcc/cp/except.c:990:0:
cfns.gperf: At top level:
cfns.gperf:101:1: error: 'gnu_inline' attribute present on 'libc_name_p'
cfns.gperf:26:14: error: but not here

Whether the compiler should always emit this error regardless of the
active standard or compiler driver is debatable</td></tr></table>
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<tr><th>author</th><td>Leo Famulari &lt;leo@famulari.name&gt;</td><td class='right'>2021-05-09 12:30:10 -0400</td></tr>
<tr><th>committer</th><td>Leo Famulari &lt;leo@famulari.name&gt;</td><td class='right'>2021-05-09 12:44:27 -0400</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/guix/commit/gnu/packages/patches/ghostscript-no-header-creationdate.patch?id=069399ee9dbf75b7c89583f03346a63b2cfe4ac6'>069399ee9dbf75b7c89583f03346a63b2cfe4ac6</a> (<a href='/guix/patch/gnu/packages/patches/ghostscript-no-header-creationdate.patch?id=069399ee9dbf75b7c89583f03346a63b2cfe4ac6'>patch</a>)</td></tr>
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<tr><th>parent</th><td colspan='2' class='oid'><a href='/guix/commit/gnu/packages/patches/ghostscript-no-header-creationdate.patch?id=0f2b5f7f733dbc4c66c1e9f8dbb5189ba6f56a80'>0f2b5f7f733dbc4c66c1e9f8dbb5189ba6f56a80</a> (<a href='/guix/diff/gnu/packages/patches/ghostscript-no-header-creationdate.patch?id=069399ee9dbf75b7c89583f03346a63b2cfe4ac6&amp;id2=0f2b5f7f733dbc4c66c1e9f8dbb5189ba6f56a80'>diff</a>)</td></tr><tr><th>download</th><td colspan='2' class='oid'><a href='/guix/snapshot/guix-069399ee9dbf75b7c89583f03346a63b2cfe4ac6.tar.gz'>guix-069399ee9dbf75b7c89583f03346a63b2cfe4ac6.tar.gz</a><br/><a href='/guix/snapshot/guix-069399ee9dbf75b7c89583f03346a63b2cfe4ac6.zip'>guix-069399ee9dbf75b7c89583f03346a63b2cfe4ac6.zip</a><br/></td></tr></table>
<div class='commit-subject'>gnu: certbot, python-acme: Update to 1.15.0.</div><div class='commit-msg'>* gnu/packages/tls.scm (python-acme, certbot): Update to 1.15.0.
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