output for xml2-config --libs: -lxml2 -lz -lm -ldl

output for xml2-config --cflags: -lxml2 -lz -lm -ldl

after installing libxml2, we have execute XML-CanonicalizeXML-0.10 we are getting an error like this:

 MakeMaker (v6.68)
Potential libraries are '-lxml2 -lz -lm -ldl':
xml2 not found in /usr/local/lib64
'-lxml2' found at /lib64/libxml2.so.2.9.1
z not found in /usr/local/lib64
'-lz' found at /lib64/libz.so.1.2.7
m not found in /usr/local/lib64
'-lm' found at /lib64/libm.so.6
dl not found in /usr/local/lib64
'-ldl' found at /lib64/libdl.so.2
Warning (non-fatal): Target 'dynamic' depends on targets in skipped se
+ction 'dynamic_lib'
Warning (non-fatal): Target 'static' depends on targets in skipped sec
+tion 'static_lib'
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output for xml2-config --cflags: -lxml2 -lz -lm -ldl

That suggests to me that you have not installed the headers.

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🦛

how do i install the headers?