--- 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]]
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<tr><td><span title='2019-11-20 20:48:50 -0500'>2019-11-20</span></td><td><a href='/guix/commit/gnu/packages/elm.scm?id=eef308d62a488fe56344ba8f7949217fb8cba427'>gnu: elm-compiler: Fix Cabal dependency constraints.</a><span class='msg-avail'>...<span class='msg-tooltip'>This package used a patch to update the Cabal version constraints for
'language-glsl'.  This is now done in a phase for consistency with
other Haskell packages.

* gnu/packages/elm.scm (elm-compiler): Add a phase that updates the
Cabal file to allow for newer versions of 'ansi-terminal',
'containers', 'http-client', 'language-glsl', and 'network'.
[source]: Remove 'elm-compiler-relax-glsl-bound.patch'.
* gnu/packages/patches/elm-compiler-relax-glsl-bound.patch: Delete file.
* gnu/local.mk: Remove it.
</span></span></td><td>Timothy Sample</td></tr>
<tr><td><span title='2019-08-17 16:23:06 +0200'>2019-08-17</span></td><td><a href='/guix/commit/gnu/packages/elm.scm?id=c902458863d1d341ffd74970b75e69c2bb848183'>gnu: Add elm-compiler 0.19.0</a><span class='msg-avail'>...<span class='msg-tooltip'>This adds the elm compiler, version 0.19.0. This provides the
`elm` command, with the exception of the `elm reactor` subcommand.

Named `elm-compiler`, to leave space for `elm` as the full elm
including reactor.

* gnu/packages/elm.scm: New module.
(elm-compiler): New package.
* gnu/packages/patches/elm-disable-reactor.patch: New patch.
* gnu/packages/patches/elm-fix-map-key.patch: New patch.
* gnu/packages/patches/elm-relax-glsl-bound.patch: New patch.
* gnu/local.mk: Add new files.

Co-authored-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Robert Vollmert</td></tr>