can't install libxml-ruby-3.1.0 on windows10，mkmf.log as following

[kematy]

find_header: checking for libxml/xmlversion.h in /opt/include/libxml2,/opt/local/include/libxml2,/usr/local/include/libxml2,/usr/include/libxml2... -------------------- no

"i686-w64-mingw32-gcc -o conftest.exe -Id:/Ruby25/include/ruby-2.5.0/i386-mingw32 -Id:/Ruby25/include/ruby-2.5.0/ruby/backward -Id:/Ruby25/include/ruby-2.5.0 -I. -D_FORTIFY_SOURCE=2 -D__USE_MINGW_ANSI_STDIO=1 -DFD_SETSIZE=2048 -D_WIN32_WINNT=0x0501 -D__MINGW_USE_VC2005_COMPAT -D_FILE_OFFSET_BITS=64 -O3 -fno-fast-math conftest.c -L. -Ld:/Ruby25/lib -L. -pipe -s -lmsvcrt-ruby250 -lgmp -lshell32 -lws2_32 -liphlpapi -limagehlp -lshlwapi "
checked program was:
/* begin */
1: #include "ruby.h"
2:
3: #include <winsock2.h>
4: #include <windows.h>
5: int main(int argc, char *argv)
6: {
7: return 0;
8: }
/ end */

"i686-w64-mingw32-gcc -E -Id:/Ruby25/include/ruby-2.5.0/i386-mingw32 -Id:/Ruby25/include/ruby-2.5.0/ruby/backward -Id:/Ruby25/include/ruby-2.5.0 -I. -D_FORTIFY_SOURCE=2 -D__USE_MINGW_ANSI_STDIO=1 -DFD_SETSIZE=2048 -D_WIN32_WINNT=0x0501 -D__MINGW_USE_VC2005_COMPAT -D_FILE_OFFSET_BITS=64 -O3 -fno-fast-math conftest.c -o conftest.i"
conftest.c:5:10: fatal error: libxml/xmlversion.h: No such file or directory
5 | #include <libxml/xmlversion.h>
| ^~~~~~~~~~~~~~~~~~~~~
compilation terminated.
checked program was:
/* begin /
1: #include "ruby.h"
2:
3: #include <winsock2.h>
4: #include <windows.h>
5: #include <libxml/xmlversion.h>
/ end */

"i686-w64-mingw32-gcc -E -Id:/Ruby25/include/ruby-2.5.0/i386-mingw32 -Id:/Ruby25/include/ruby-2.5.0/ruby/backward -Id:/Ruby25/include/ruby-2.5.0 -I. -D_FORTIFY_SOURCE=2 -D__USE_MINGW_ANSI_STDIO=1 -DFD_SETSIZE=2048 -D_WIN32_WINNT=0x0501 -D__MINGW_USE_VC2005_COMPAT -D_FILE_OFFSET_BITS=64 -O3 -fno-fast-math -I/opt/include/libxml2 conftest.c -o conftest.i"
conftest.c:5:10: fatal error: libxml/xmlversion.h: No such file or directory
5 | #include <libxml/xmlversion.h>
| ^~~~~~~~~~~~~~~~~~~~~
compilation terminated.
checked program was:
/* begin /
1: #include "ruby.h"
2:
3: #include <winsock2.h>
4: #include <windows.h>
5: #include <libxml/xmlversion.h>
/ end */

"i686-w64-mingw32-gcc -E -Id:/Ruby25/include/ruby-2.5.0/i386-mingw32 -Id:/Ruby25/include/ruby-2.5.0/ruby/backward -Id:/Ruby25/include/ruby-2.5.0 -I. -D_FORTIFY_SOURCE=2 -D__USE_MINGW_ANSI_STDIO=1 -DFD_SETSIZE=2048 -D_WIN32_WINNT=0x0501 -D__MINGW_USE_VC2005_COMPAT -D_FILE_OFFSET_BITS=64 -O3 -fno-fast-math -I/opt/local/include/libxml2 conftest.c -o conftest.i"
conftest.c:5:10: fatal error: libxml/xmlversion.h: No such file or directory
5 | #include <libxml/xmlversion.h>
| ^~~~~~~~~~~~~~~~~~~~~
compilation terminated.
checked program was:
/* begin /
1: #include "ruby.h"
2:
3: #include <winsock2.h>
4: #include <windows.h>
5: #include <libxml/xmlversion.h>
/ end */

"i686-w64-mingw32-gcc -E -Id:/Ruby25/include/ruby-2.5.0/i386-mingw32 -Id:/Ruby25/include/ruby-2.5.0/ruby/backward -Id:/Ruby25/include/ruby-2.5.0 -I. -D_FORTIFY_SOURCE=2 -D__USE_MINGW_ANSI_STDIO=1 -DFD_SETSIZE=2048 -D_WIN32_WINNT=0x0501 -D__MINGW_USE_VC2005_COMPAT -D_FILE_OFFSET_BITS=64 -O3 -fno-fast-math -I/usr/local/include/libxml2 conftest.c -o conftest.i"
conftest.c:5:10: fatal error: libxml/xmlversion.h: No such file or directory
5 | #include <libxml/xmlversion.h>
| ^~~~~~~~~~~~~~~~~~~~~
compilation terminated.
checked program was:
/* begin /
1: #include "ruby.h"
2:
3: #include <winsock2.h>
4: #include <windows.h>
5: #include <libxml/xmlversion.h>
/ end */

"i686-w64-mingw32-gcc -E -Id:/Ruby25/include/ruby-2.5.0/i386-mingw32 -Id:/Ruby25/include/ruby-2.5.0/ruby/backward -Id:/Ruby25/include/ruby-2.5.0 -I. -D_FORTIFY_SOURCE=2 -D__USE_MINGW_ANSI_STDIO=1 -DFD_SETSIZE=2048 -D_WIN32_WINNT=0x0501 -D__MINGW_USE_VC2005_COMPAT -D_FILE_OFFSET_BITS=64 -O3 -fno-fast-math -I/usr/include/libxml2 conftest.c -o conftest.i"
conftest.c:5:10: fatal error: libxml/xmlversion.h: No such file or directory
5 | #include <libxml/xmlversion.h>
| ^~~~~~~~~~~~~~~~~~~~~
compilation terminated.
checked program was:
/* begin /
1: #include "ruby.h"
2:
3: #include <winsock2.h>
4: #include <windows.h>
5: #include <libxml/xmlversion.h>
/ end */

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