[master] Merge branch 'trac3511' (pkg-config dependency removal)

Conflicts:
	ChangeLog

ChangeLog

+828.	[build]		jreed
+	The configure script no longer requires pkg-config.
+	(Trac #3511, git 99a5a2db8c011b358873d485ac48f7c78ac6374c)
+
 827.	[build]		jiri, tomek
 	Deprecated AC_PROG_LIBTOOL macro replaced by LT_INIT.
 	(Trac #3525, git 6c0aacf29fae1d0501ca69ff6324df8d4fc8c7ee)

configure.ac

@@ -1199,12 +1199,6 @@ AC_SUBST(GTEST_LDFLAGS)
 AC_SUBST(GTEST_LDADD)
 AC_SUBST(GTEST_SOURCE)
 
-dnl check for pkg-config itself
-AC_CHECK_PROG(HAVE_PKG_CONFIG, pkg-config, yes, no)
-if test "x$HAVE_PKG_CONFIG" = "xno" ; then
-  AC_MSG_ERROR(Please install pkg-config)
-fi
-
 #
 # ASIO: we extensively use it as the C++ event management module.
 #

doc/guide/install.xml

@@ -142,8 +142,7 @@ Debian and Ubuntu:
 
         <listitem>
         <para>
-          The development tools "make" and "pkg-config".
-	  <!-- @todo update this list, pkg-config shouldn't be required -->
+          The development tools "make".
         </para>
         </listitem>