Debian is taking steps towards removing xml2-config in favour of using pkg-config to find libxml2.
This means Kannel will fail to build from source on Debian and related distributions that track Debian packages (such as Ubuntu). Following a brief discussion in #830 [1], I have patched configure.in to check for libxml2 using xml2-config, then check for libxml2 using pkg-config if xml2-config is not found or libxml2 is too old. Hugh [1] https://redmine.kannel.org/issues/830
Index: configure.in =================================================================== --- configure.in (revision 5325) +++ configure.in (working copy) @@ -120,6 +120,15 @@ AC_PATH_PROG(CONVERT, convert) AC_PATH_PROG(PERL, perl) +# Check whether `pkg-config' is available +AC_ARG_VAR([PKG_CONFIG], [path to pkg-config]) +AC_ARG_VAR([PKG_CONFIG_PATH], [directories to add to the pkg-config search path]) +AC_ARG_VAR([PKG_CONFIG_LIBDIR], [path overriding pkg-config's search path]) + +if test "x$ac_cv_env_PKG_CONFIG_set" != "xset"; then + AC_PATH_TOOL([PKG_CONFIG], [pkg-config]) +fi + dnl Apply system specific rules. dnl Executable extension for systems that need one, i.e. Cygwin EXE_EXT="" @@ -361,25 +370,47 @@ dnl Check if we have libxml2 installed and which version it is. dnl Kannel requires currently at least version 2.6.0 of libxml2. +dnl Try xml2-config first, then pkg-config. AC_CONFIG_SECTION([Checking for libxml2 support]) xml_ver_required="2.6.0" -AC_PATH_PROGS(XML_CONFIG, xml2-config xml-config, no) -if test "$XML_CONFIG" = "no"; then - AC_MSG_ERROR([You MUST have the libxml2 (aka gnome-xml) library installed]) -else - AC_MSG_CHECKING([libxml version]) - xml_version=`$XML_CONFIG --version` - AC_MSG_RESULT([$xml_version]) - AC_CHECK_VERSION($xml_version, $xml_ver_required, - [ LIBS="$LIBS `$XML_CONFIG --libs`" - CFLAGS="$CFLAGS `$XML_CONFIG --cflags`" +have_libxml="no" + +AC_PATH_PROG(XML2_CONFIG, xml2-config, no) +if test "$XML2_CONFIG" != "no"; then + AC_MSG_CHECKING([for libxml2 >= $xml_ver_required via xml2-config]) + XML2_VERSION=`$XML2_CONFIG --version` + AC_CHECK_VERSION($XML2_VERSION, $xml_ver_required, + [ XML2_LIBS=`$XML2_CONFIG --libs` + XML2_CFLAGS=`$XML2_CONFIG --cflags` + AC_MSG_RESULT([found $XML2_VERSION]) + have_libxml="yes" ],[ - AC_MSG_ERROR([libxml2 version $xml_version is too old. You need at least $xml_ver_required]) + AC_MSG_RESULT([not found]) ]) fi +if test "$have_libxml" = "no" && test -n "$PKG_CONFIG"; then + AC_MSG_CHECKING([for libxml2 >= $xml_ver_required via pkg-config]) + if `$PKG_CONFIG --exists "libxml-2.0 >= $xml_ver_required"`; then + XML2_LIBS=`$PKG_CONFIG --libs libxml-2.0` + XML2_CFLAGS=`$PKG_CONFIG --cflags libxml-2.0` + XML2_VERSION=`$PKG_CONFIG --modversion libxml-2.0` + AC_MSG_RESULT([found $XML2_VERSION]) + have_libxml="yes" + else + AC_MSG_RESULT([not found]) + fi +fi +if test "$have_libxml" = "yes"; then + CFLAGS="$CFLAGS $XML2_CFLAGS" + LIBS="$LIBS $XML2_LIBS" +else + AC_MSG_ERROR(m4_normalize([libxml2 not found or too old. You MUST have \ + libxml $xml_ver_required or more recent installed.])) +fi + dnl Implement the --enable-pcre option. This will set HAVE_PCRE in gw-config.h dnl accordingly and enable the usage of Perl compatible regular expressions. dnl As POSIX regex is a subset of PCRE, we map the posixpcre API calls, so
