--- a/libstdc++-v3/src/c++17/floating_from_chars.cc
+++ b/libstdc++-v3/src/c++17/floating_from_chars.cc
@@ -495,10 +495,16 @@
 from_chars(const char* first, const char* last, __ieee128& value,
          chars_format fmt) noexcept
 {
+  errc ec = errc::invalid_argument;
+#if _GLIBCXX_USE_CXX11_ABI
   buffer_resource mr;
   pmr::string buf(&mr);
+#else
+  string buf;
+  if (!reserve_string(buf))
+    return make_result(first, 0, {}, ec);
+#endif
   size_t len = 0;
-  errc ec = errc::invalid_argument;
   __try
     {
       if (const char* pat = pattern(first, last, fmt, buf)) [[likely]]
n' name='id' value='74ed0a9f15148e3267a5a0962842b2b1d40c41d3'/><select name='h' onchange='this.form.submit();'>
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<tr><td class='sub'>Wojtek's customized Guix</td><td class='sub right'></td></tr></table>
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<div class='path'>path: <a href='/guix/log/?id=74ed0a9f15148e3267a5a0962842b2b1d40c41d3'>root</a>/<a href='/guix/log/manifest.scm?id=74ed0a9f15148e3267a5a0962842b2b1d40c41d3'>manifest.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/manifest.scm?id=74ed0a9f15148e3267a5a0962842b2b1d40c41d3&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2024-06-24 08:51:43 -0400'>2024-06-24</span></td><td><a href='/guix/commit/manifest.scm?id=7f194852a46edfe47537d11bc39fb1dd20e18b37'>manifest: Streamline; add packages useful for patch review/submission.</a><span class='msg-avail'>...<span class='msg-tooltip'>* manifest.scm: Fix alternate command line invocation (which would not
consider 'manifest.scm').  Use specifications instead of packages.  Remove
perl (now in the guix package's native inputs).  Add b4, git, git:send-email,
mumi, nss-certs, openssl and patman to the manifest.

Change-Id: I49d92dda059856ce217cea9054a466a1754dcf94
Signed-off-by: Maxim Cournoyer &lt;maxim.cournoyer@gmail.com&gt;
</span></span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2024-04-02 23:28:58 +0200'>2024-04-02</span></td><td><a href='/guix/commit/manifest.scm?id=049273bb8c1ea3d6402db646312acdc4abf4678a'>maint: Add perl to the manifest.</a><span class='msg-avail'>...<span class='msg-tooltip'>* manifest.scm: Add perl.

Change-Id: Ie70cea1eb4d62f2a649292209391a92abdae2288
</span></span></td><td>Janneke Nieuwenhuizen</td></tr>
<tr><td><span title='2024-01-31 09:07:25 +0100'>2024-01-31</span></td><td><a href='/guix/commit/manifest.scm?id=66dd088d3c3404f5cbe2d4d4c5e8f93d184703b0'>maint: Add gnupg to the manifest.</a><span class='msg-avail'>...<span class='msg-tooltip'>* manifest.scm: Add gnupg.

Change-Id: Id5e90f87e5c3a07aa3e49afa97cc0b6d3ce71b41
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2023-09-18 22:12:39 +0200'>2023-09-18</span></td><td><a href='/guix/commit/manifest.scm?id=7bf12820f61179900f9d1f753acf91fd33724976'>maint: Support `guix shell' in Guix's git archive with manifest.scm.</a><span class='msg-avail'>...<span class='msg-tooltip'>* manifest.scm: New file.
* Makefile.am (EXTRA_DIST): Add it.
* doc/contributing.texi (Building from Git): Mention using it.
</span></span></td><td>Janneke Nieuwenhuizen</td></tr>