<p>Oldest <code>RHEL-6</code>  based dist (CentOS-6, Oracle Linux 6) is have <code>pkgconfig-0.23-9</code> and <code>libxml2-2.7.6</code></p>
<pre><code>[root@8760520b12b8 /]# cat /usr/lib64/pkgconfig/libxml-2.0.pc 
prefix=/usr
exec_prefix=/usr
libdir=/usr/lib64
includedir=/usr/include
modules=1

Name: libXML
Version: 2.7.6
Description: libXML library version2.
Requires:
Libs: -L${libdir} -lxml2
Libs.private:  -lz  -lm 
Cflags: -I${includedir}/libxml2 
</code></pre>
<p>For oldest OpenSUSE <code>pkg-config-0.28-11</code> and <code>libxml2-devel-2.9.4</code></p>
<pre><code>52640dd1687d:/ # cat /usr/lib64/pkgconfig/libxml-2.0.pc 
prefix=/usr
exec_prefix=/usr
libdir=/usr/lib64
includedir=/usr/include
modules=1

Name: libXML
Version: 2.9.4
Description: libXML library version2.
Requires:
Libs: -L${libdir} -lxml2
Libs.private:   -L/lib64 -lz  -llzma   -lm  
Cflags: -I${includedir}/libxml2 
</code></pre>

<p style="font-size:small;-webkit-text-size-adjust:none;color:#666;">—<br />You are receiving this because you are subscribed to this thread.<br />Reply to this email directly, <a href="https://github.com/kamailio/kamailio/issues/2199?email_source=notifications&email_token=ABO7UZIAXPGML3XBR45RRKTQ7AFBPA5CNFSM4KKBV7S2YY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOEJSZSKQ#issuecomment-577083690">view it on GitHub</a>, or <a href="https://github.com/notifications/unsubscribe-auth/ABO7UZMW54OBFPXLNZ3OOATQ7AFBPANCNFSM4KKBV7SQ">unsubscribe</a>.<img src="https://github.com/notifications/beacon/ABO7UZOTYC3DKRIF2GNWSNDQ7AFBPA5CNFSM4KKBV7S2YY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOEJSZSKQ.gif" height="1" width="1" alt="" /></p>
<script type="application/ld+json">[
{
"@context": "http://schema.org",
"@type": "EmailMessage",
"potentialAction": {
"@type": "ViewAction",
"target": "https://github.com/kamailio/kamailio/issues/2199?email_source=notifications\u0026email_token=ABO7UZIAXPGML3XBR45RRKTQ7AFBPA5CNFSM4KKBV7S2YY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOEJSZSKQ#issuecomment-577083690",
"url": "https://github.com/kamailio/kamailio/issues/2199?email_source=notifications\u0026email_token=ABO7UZIAXPGML3XBR45RRKTQ7AFBPA5CNFSM4KKBV7S2YY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOEJSZSKQ#issuecomment-577083690",
"name": "View Issue"
},
"description": "View this Issue on GitHub",
"publisher": {
"@type": "Organization",
"name": "GitHub",
"url": "https://github.com"
}
}
]</script>