Bug#892095: libc++ FTBFS with glibc 2.26: fatal error: 'xlocale.h' file not found

[Adrian Bunk]

Source: libc++
Version: 3.5-2
Severity: serious
Tags: buster sid
Control: fixed -1 5.0.1-1
Control: close -1

https://tests.reproducible-builds.org/debian/rb-pkg/buster/amd64/libc++.html

...
In file included from ../src/algorithm.cpp:12:
In file included from ../include/random:1645:
In file included from ../include/istream:156:
In file included from ../include/ostream:131:
In file included from ../include/ios:216:
../include/__locale:34:11: fatal error: 'xlocale.h' file not found
# include <xlocale.h>
          ^~~~~~~~~~~
1 error generated.
debian/rules:19: recipe for target 'override_dh_auto_build' failed
make[1]: *** [override_dh_auto_build] Error 1


This bug is already fixed in the version in unstable.