# xlocale.h is gone with glibc 2.26 and should never had been included.
# https://ssl.icu-project.org/trac/ticket/13329
diff -ur icu.org/source/i18n/digitlst.cpp icu/source/i18n/digitlst.cpp
--- icu.org/source/i18n/digitlst.cpp	2017-01-20 01:20:31.000000000 +0100
+++ icu/source/i18n/digitlst.cpp	2017-09-13 13:25:59.980160603 +0200
@@ -63,6 +63,8 @@
 #if U_USE_STRTOD_L
 # if U_PLATFORM_USES_ONLY_WIN32_API || U_PLATFORM == U_PF_CYGWIN
 #   include <locale.h>
+# elif U_PLATFORM_IS_LINUX_BASED
+#   include <ctype.h>   // should be for all POSIX.2008 compliant platforms, but..
 # else
 #   include <xlocale.h>
 # endif