Install asciidoctor-mathematical using wsys2 in Windows 10

[yoonghm]

I am using Ruby 3.1.0p0 and AsciiDoctor 2.0.17 in Windows 10.

I have installed libxml2-devel with the command

pacman -S libxml2-devel

I noticed that libxml2 header files and libraries are in

• ..\Ruby\msys64\user\include\libxml2\
• ..\Ruby\msys64\usr\lib\libxml2.a
• ..\Ruby\msys64\usr\lib\libxml2.dll.a
• ..\Ruby\msys64\usr\bin\xml2-config

However the command gem install asciidoctor-mathematical complained: "missing lxml2", "libxml/tree.h in /include/libxml2", etc.

It seems that the base directory ..\Ruby\msys64\usr are not passed from to cmakefile.

Can you advise?