xml2-config: Add a --dynamic switch to print only shared libraries

`xml2-config --libs` prints static library linking information by default.
This is un-necessary for most programs, so introduce a new option, --dynamic,
which, when combined with --libs, only prints shared library linking information.

Makefile.am

@@ -1231,6 +1231,7 @@ xml2Conf.sh: xml2Conf.sh.in Makefile
 	    -e 's?\@XML_INCLUDEDIR\@?$(XML_INCLUDEDIR)?g' \
 	    -e 's?\@VERSION\@?$(VERSION)?g' \
 	    -e 's?\@XML_LIBS\@?$(XML_LIBS)?g' \
+	    -e 's?\@XML_PRIVATE_LIBS\@?$(XML_PRIVATE_LIBS)?g' \
 	       < $(srcdir)/xml2Conf.sh.in > xml2Conf.tmp \
 	&& mv xml2Conf.tmp xml2Conf.sh
 

configure.ac

@@ -1533,7 +1533,8 @@ else
         WITH_ICU=1
     fi
 fi
-XML_LIBS="-lxml2 $Z_LIBS $LZMA_LIBS $THREAD_LIBS $ICONV_LIBS $ICU_LIBS $M_LIBS $LIBS"
+XML_LIBS="-lxml2"
+XML_PRIVATE_LIBS="$Z_LIBS $LZMA_LIBS $THREAD_LIBS $ICONV_LIBS $ICU_LIBS $M_LIBS $LIBS"
 XML_LIBTOOLLIBS="libxml2.la"
 AC_SUBST(WITH_ICU)
 
@@ -1678,6 +1679,7 @@ AC_SUBST(XML_CFLAGS)
 
 AC_SUBST(XML_LIBDIR)
 AC_SUBST(XML_LIBS)
+AC_SUBST(XML_PRIVATE_LIBS)
 AC_SUBST(XML_LIBTOOLLIBS)
 AC_SUBST(ICONV_LIBS)
 AC_SUBST(ICU_LIBS)

xml2-config.1

@@ -16,6 +16,7 @@ Print the currently installed version of \fIGNOME-XML\fP on the standard output.
 .TP 8
 .B  \-\-libs
 Print the linker flags that are necessary to link a \fIGNOME-XML\fP program.
+Add \-\-dynamic after --libs to print only shared library linking information.
 .TP 8
 .B  \-\-cflags
 Print the compiler flags that are necessary to compile a \fIGNOME-XML\fP program.

xml2-config.in

@@ -15,6 +15,7 @@ Known values for OPTION are:
   --prefix=DIR		change libxml prefix [default $prefix]
   --exec-prefix=DIR	change libxml exec prefix [default $exec_prefix]
   --libs		print library linking information
+                        add --dynamic to print only shared libraries
   --cflags		print pre-processor and compiler flags
   --modules		module support enabled
   --help		display this help and exit
@@ -82,18 +83,19 @@ while test $# -gt 0; do
        	;;
 
     --libs)
-        if [ "`uname`" = "Linux" ]
-	then
-	    if [ "@XML_LIBDIR@" = "-L/usr/lib" -o "@XML_LIBDIR@" = "-L/usr/lib64" ]
-	    then
-		echo @XML_LIBS@ @MODULE_PLATFORM_LIBS@
-	    else
-		echo @XML_LIBDIR@ @XML_LIBS@ @MODULE_PLATFORM_LIBS@
-	    fi
-	else
-	    echo @XML_LIBDIR@ @XML_LIBS@ @MODULE_PLATFORM_LIBS@ @WIN32_EXTRA_LIBADD@
-	fi
-       	;;
+        if [ "$2" = "--dynamic" ]; then
+            shift
+            LIBS="@XML_LIBS@"
+        else
+            LIBS="@XML_LIBS@ @XML_PRIVATE_LIBS@ @MODULE_PLATFORM_LIBS@"
+        fi
+
+        if [ "@XML_LIBDIR@" != "-L/usr/lib" -a "@XML_LIBDIR@" != "-L/usr/lib64" ]; then
+            LIBS="@XML_LIBDIR@ $LIBS"
+        fi
+
+        echo ${LIBS} @WIN32_EXTRA_LIBADD@
+        ;;
 
     *)
 	usage

xml2Conf.sh.in

@@ -2,7 +2,7 @@
 # Configuration file for using the XML library in GNOME applications
 #
 XML2_LIBDIR="@XML_LIBDIR@"
-XML2_LIBS="@XML_LIBS@"
+XML2_LIBS="@XML_LIBS@ @XML_PRIVATE_LIBS@"
 XML2_INCLUDEDIR="@XML_INCLUDEDIR@"
 MODULE_VERSION="xml2-@VERSION@"