This fixes

../../../../gcc-7.4.0/libstdc++-v3/libsupc++/new_opa.cc: In function ‘void* __gnu_cxx::aligned_alloc(std::size_t, std::size_t)’:
../../../../gcc-7.4.0/libstdc++-v3/libsupc++/new_opa.cc:78:10: error: ‘memalign’ was not declared in this scope
   return memalign (al, sz);
          ^~~~~~~~
../../../../gcc-7.4.0/libstdc++-v3/libsupc++/new_opa.cc:78:10: note: suggested alternative: ‘max_align_t’
   return memalign (al, sz);
          ^~~~~~~~
          max_align_t

diff --git a/libstdc++-v3/libsupc++/new_opa.cc b/libstdc++-v3/libsupc++/new_opa.cc
index 94e79cadb0e..084900e0daf 100644
--- a/libstdc++-v3/libsupc++/new_opa.cc
+++ b/libstdc++-v3/libsupc++/new_opa.cc
@@ -39,6 +39,8 @@ extern "C" void *memalign(std::size_t boundary, std::size_t size);
 # endif
 #endif
 
+#define memalign _aligned_malloc
+
 using std::new_handler;
 using std::bad_alloc;
 
'switch'/></form></td></tr>
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<tr><td><span title='2020-06-28 23:32:52 +0200'>2020-06-28</span></td><td><a href='/guix/commit/tests/syscalls.scm?id=5e113cf4424b2746cbf3633cd2106c62b89e5b49'>tests: Do not fail when network interface aliases are present.</a><span class='msg-avail'>...<span class='msg-tooltip'>Fixes &lt;https://bugs.gnu.org/42111&gt;.

* tests/syscalls.scm ("network-interface-names"): Filter interface names with
a colon.
</span></span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2020-06-05 19:20:23 +0200'>2020-06-05</span></td><td><a href='/guix/commit/tests/syscalls.scm?id=ea924134f819eef072ba7df9080d39de97fd73e6'>tests: syscall: Support file-systems without extended attributes.</a><span class='msg-avail'>...<span class='msg-tooltip'>* tests/syscalls.scm (setxattr): Catch ENOTSUP that can be raised if the
file-system does not support extended user attributes.
</span></span></td><td>Mathieu Othacehe</td></tr>
<tr><td><span title='2020-06-02 10:24:03 +0200'>2020-06-02</span></td><td><a href='/guix/commit/tests/syscalls.scm?id=cb21c14b0ae1f4c9fcad4927e3b2eb0c06d7b018'>tests: Allow passing on systems without support for swap devices.</a><span class='msg-avail'>...<span class='msg-tooltip'>* tests/syscalls.scm ("swapon", "swapoff"): Accept ENOSYS as a valid result.

Signed-off-by: Mathieu Othacehe &lt;othacehe@gnu.org&gt;
</span></span></td><td>Simon South</td></tr>