libxml2 2020-04-27 (47212d6c)

Code extracted from:

    https://gitlab.kitware.com/third-party/libxml2.git

at commit 47212d6c3879aeb3ccad457225e4d87194091a6f (for/vtk-20200427-2.9.10).

CMakeLists.txt

@@ -68,6 +68,7 @@ CHECK_INCLUDE_FILE_CONCAT("malloc.h"         HAVE_MALLOC_H)
 CHECK_INCLUDE_FILE_CONCAT("inttypes.h"       HAVE_INTTYPES_H)
 CHECK_INCLUDE_FILE_CONCAT("limits.h"         HAVE_LIMITS_H)
 CHECK_INCLUDE_FILE_CONCAT("stdint.h"         HAVE_STDINT_H)
+CHECK_INCLUDE_FILE_CONCAT("stdio.h"          HAVE_STDIO_H)
 CHECK_INCLUDE_FILE_CONCAT("stdlib.h"         HAVE_STDLIB_H)
 CHECK_INCLUDE_FILE_CONCAT("string.h"         HAVE_STRING_H)
 CHECK_INCLUDE_FILE_CONCAT("sys/stat.h"       HAVE_SYS_STAT_H)