diff --git a/configure.in b/configure.in
index f31f7ef..81ac837 100644
--- a/configure.in
+++ b/configure.in
@@ -706,18 +706,24 @@ PGAC_ARG_BOOL(with, libxml, no, [build with XML support],
[AC_DEFINE([USE_LIBXML], 1, [Define to 1 to build with XML support. (--with-libxml)])])
if test "$with_libxml" = yes ; then
- AC_CHECK_PROGS(XML2_CONFIG, xml2-config)
- if test -n "$XML2_CONFIG"; then
- for pgac_option in `$XML2_CONFIG --cflags`; do
- case $pgac_option in
- -I*|-D*) CPPFLAGS="$CPPFLAGS $pgac_option";;
- esac
- done
- for pgac_option in `$XML2_CONFIG --libs`; do
- case $pgac_option in
- -L*) LDFLAGS="$LDFLAGS $pgac_option";;
- esac
- done
+ AC_CHECK_PROGS(PKG_CONFIG, pkg-config)
+ if test -n "$PKG_CONFIG" && $PKG_CONFIG --exists libxml-2.0; then
+ CPPFLAGS="$CPPFLAGS "`$PKG_CONFIG libxml-2.0 --cflags-only-I`
+ LDFLAGS="$LDFLAGS "`$PKG_CONFIG libxml-2.0 --libs-only-L`
+ else
+ AC_CHECK_PROGS(XML2_CONFIG, xml2-config)
+ if test -n "$XML2_CONFIG"; then
+ for pgac_option in `$XML2_CONFIG --cflags`; do
+ case $pgac_option in
+ -I*|-D*) CPPFLAGS="$CPPFLAGS $pgac_option";;
+ esac
+ done
+ for pgac_option in `$XML2_CONFIG --libs`; do
+ case $pgac_option in
+ -L*) LDFLAGS="$LDFLAGS $pgac_option";;
+ esac
+ done
+ fi
fi
fi
diff --git a/doc/src/sgml/installation.sgml b/doc/src/sgml/installation.sgml
index 22e6cf1..09c1d09 100644
--- a/doc/src/sgml/installation.sgml
+++ b/doc/src/sgml/installation.sgml
@@ -892,11 +892,18 @@ Configuration
- Libxml installs a program xml2-config that
- can be used to detect the required compiler and linker
- options. PostgreSQL will use it automatically if found. To
- specify a libxml installation at an unusual location, you can
- either set the environment variable
+ To detect the required compiler and linker options, PostgreSQL will
+ query pkg-config, if it is installed and knows
+ about libxml2. Otherwise the program xml2-config,
+ which is installed by libxml, will be used if it is found. Use
+ of pkg-config is preferred, because it can deal
+ with multi-arch installations better.
+
+
+
+ To specify a libxml installation at an unusual location, you can
+ either set pkg-config-related environment variables
+ (see its documentation), or set the environment variable
XML2_CONFIG to point to the
xml2-config program belonging to the
installation, or use the options