--- /dev/null
+From 39edb8ef08f51ea6a454d286091d78a4514c89e0 Mon Sep 17 00:00:00 2001
+From: Fabrice Fontaine <fontaine.fabrice@gmail.com>
+Date: Sat, 1 Dec 2018 18:21:55 +0100
+Subject: [PATCH] configure.ac: use pkg-config to find libxml2
+
+Fix static build of squid with libxml2 by using pkg-config to find
+libxml2 dependencies like -lz or -liconv
+
+Fixes:
+ - http://autobuild.buildroot.org/results/7f23eb98c311b294c7f0e165279fa26909a5ff93
+
+Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
+[Upstream status: https://github.com/squid-cache/squid/pull/338]
+---
+ configure.ac | 43 +++++++++++++++++++++++++------------------
+ 1 file changed, 25 insertions(+), 18 deletions(-)
+
+diff --git a/configure.ac b/configure.ac
+index f30d824aa..47553db46 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -900,29 +900,36 @@ fi
+
+ AC_ARG_WITH(libxml2, AS_HELP_STRING([--without-libxml2],[Do not use libxml2 for ESI. Default: auto-detect]))
+ if test "x$squid_opt_use_esi" != "xno" -a "x$with_libxml2" != "xno" ; then
+- AC_CHECK_LIB([xml2], [main], [XMLLIB="-lxml2"; HAVE_LIBXML2=1])
+- dnl Find the main header and include path...
+- AC_CACHE_CHECK([location of libxml2 include files], [ac_cv_libxml2_include], [
+- AC_CHECK_HEADERS([libxml/parser.h], [], [
+- AC_MSG_NOTICE([Testing in /usr/include/libxml2])
+- SAVED_CPPFLAGS="$CPPFLAGS"
+- CPPFLAGS="-I/usr/include/libxml2 $CPPFLAGS"
+- unset ac_cv_header_libxml_parser_h
+- AC_CHECK_HEADERS([libxml/parser.h], [ac_cv_libxml2_include="-I/usr/include/libxml2"], [
+- AC_MSG_NOTICE([Testing in /usr/local/include/libxml2])
+- CPPFLAGS="-I/usr/local/include/libxml2 $SAVED_CPPFLAGS"
++ PKG_CHECK_MODULES([LIBXML2],[libxml-2.0],[
++ CPPFLAGS="$CPPFLAGS $LIBXML2_CFLAGS";
++ SQUID_CXXFLAGS="$SQUID_CXXFLAGS $LIBXML2_CFLAGS";
++ XMLLIB="$LIBXML2_LIBS";
++ HAVE_LIBXML2=1
++ ],[
++ AC_CHECK_LIB([xml2], [main], [XMLLIB="-lxml2"; HAVE_LIBXML2=1])
++ dnl Find the main header and include path...
++ AC_CACHE_CHECK([location of libxml2 include files], [ac_cv_libxml2_include], [
++ AC_CHECK_HEADERS([libxml/parser.h], [], [
++ AC_MSG_NOTICE([Testing in /usr/include/libxml2])
++ SAVED_CPPFLAGS="$CPPFLAGS"
++ CPPFLAGS="-I/usr/include/libxml2 $CPPFLAGS"
+ unset ac_cv_header_libxml_parser_h
+- AC_CHECK_HEADERS([libxml/parser.h], [ac_cv_libxml2_include="-I/usr/local/include/libxml2"], [
+- AC_MSG_NOTICE([Failed to find libxml2 header file libxml/parser.h])
++ AC_CHECK_HEADERS([libxml/parser.h], [ac_cv_libxml2_include="-I/usr/include/libxml2"], [
++ AC_MSG_NOTICE([Testing in /usr/local/include/libxml2])
++ CPPFLAGS="-I/usr/local/include/libxml2 $SAVED_CPPFLAGS"
++ unset ac_cv_header_libxml_parser_h
++ AC_CHECK_HEADERS([libxml/parser.h], [ac_cv_libxml2_include="-I/usr/local/include/libxml2"], [
++ AC_MSG_NOTICE([Failed to find libxml2 header file libxml/parser.h])
++ ])
+ ])
++ CPPFLAGS="$SAVED_CPPFLAGS"
+ ])
+- CPPFLAGS="$SAVED_CPPFLAGS"
+ ])
++ if test "x$ac_cv_libxml2_include" != "x"; then
++ SQUID_CXXFLAGS="$ac_cv_libxml2_include $SQUID_CXXFLAGS"
++ CPPFLAGS="$ac_cv_libxml2_include $CPPFLAGS"
++ fi
+ ])
+- if test "x$ac_cv_libxml2_include" != "x"; then
+- SQUID_CXXFLAGS="$ac_cv_libxml2_include $SQUID_CXXFLAGS"
+- CPPFLAGS="$ac_cv_libxml2_include $CPPFLAGS"
+- fi
+ dnl Now that we know where to look find the headers...
+ AC_CHECK_HEADERS(libxml/parser.h libxml/HTMLparser.h libxml/HTMLtree.h)
+ AC_DEFINE_UNQUOTED(HAVE_LIBXML2, $HAVE_LIBXML2, [Define to 1 if you have the libxml2 library])
+--
+2.17.1
+