Update autotools configuration

Replace deprecated macros and use the new libtool syntax. The required
versions of the tools have been bumped up to match the versions of the
bundled glib. This was effectively the requirement, anyway. The new
required autotools versions are:

autoconf-2.62 (released 2008-04-08)
automake-1.11 (released 2009-05-17)
libtool-2.2 (released 2008-03-01)

Also use silent rules to quiet the build a bit.

Freedesktop #34382

Makefile.am

@@ -1,3 +1,5 @@
+ACLOCAL_AMFLAGS = ${ACLOCAL_FLAGS}
+
 pkg_config_LDADD=@GLIB_LIBS@
 
 if INTERNAL_GLIB

configure.ac

@@ -1,16 +1,33 @@
+AC_PREREQ([2.62])
+AC_INIT([pkg-config],
+        [0.26],
+        [https://bugs.freedesktop.org/enter_bug.cgi?product=pkg-config],
+        [pkg-config])
 
-AC_INIT(pkg-config.1)
+AC_CONFIG_HEADERS([config.h])
+AC_CONFIG_SRCDIR([main.c])
 
-AM_INIT_AUTOMAKE(pkg-config, 0.26)
+dnl Initialize automake and libtool
+AM_INIT_AUTOMAKE([1.11])
+LT_PREREQ([2.2])
+LT_INIT
 
-AM_CONFIG_HEADER(config.h)
-
-AM_PROG_LIBTOOL
-dnl when using libtool 2.x create libtool early, because it's used in configure
-m4_ifdef([LT_OUTPUT], [LT_OUTPUT])
+dnl Support silent build rules, requires at least automake-1.11. Disable
+dnl by either passing --disable-silent-rules to configure or passing V=1
+dnl to make
+m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
 
+dnl Check for programs
 AC_PROG_CC
 
+dnl Check for headers
+AC_CHECK_HEADERS([dirent.h unistd.h sys/wait.h malloc.h])
+
+dnl Check for library functions
+AC_FUNC_ALLOCA
+AC_CHECK_FUNCS(setresuid setreuid,break)
+
+
 dnl
 dnl Default pkg-config search path
 dnl
@@ -64,19 +81,23 @@ esac
 AC_MSG_RESULT([$system_library_path])
 AC_SUBST([system_library_path])
 
-#
-# Code taken from gtk+-2.0's configure.in.
-#
-# This causes pkg-config to not list private dependencies (a very
-# common example is libm) on platforms which support inter-library
-# dependencies.
+dnl Code taken from gtk+-2.0's configure.in.
+dnl
+dnl This causes pkg-config to not list private dependencies (a very
+dnl common example is libm) on platforms which support inter-library
+dnl dependencies.
+dnl
+dnl When using libtool 2.x, we need to force libtool to be created
+dnl early so we can use it here.
+m4_ifdef([LT_OUTPUT], [LT_OUTPUT])
 
-AC_ARG_ENABLE(indirect-deps,
-        [AC_HELP_STRING([--enable-indirect-deps],
-                              [list both direct and indirect dependencies.])
-AC_HELP_STRING([--disable-indirect-deps],
-                              [only list direct dependencies.])
-    [default=auto]],use_indirect_deps=$enableval,
+AC_ARG_ENABLE([indirect-deps],
+    [AS_HELP_STRING([--enable-indirect-deps],
+                    [list both direct and indirect dependencies.])
+     AS_HELP_STRING([--disable-indirect-deps],
+                    [only list direct dependencies.])
+    [default=auto]],
+    [use_indirect_deps=$enableval],
     [use_indirect_deps=auto])
 echo use_indirect_deps=$use_indirect_deps >&AS_MESSAGE_LOG_FD
 AC_MSG_CHECKING([whether to list both direct and indirect dependencies])
@@ -97,20 +118,20 @@ or auto])
   ;;
 esac
 AC_MSG_RESULT($use_indirect_deps)
+AC_DEFINE_UNQUOTED([ENABLE_INDIRECT_DEPS],
+    [`test $use_indirect_deps = no; echo $?`],
+    [Link library to all dependent libraries, not only directly needed ones])
+AC_SUBST([use_indirect_deps])
 
-#
-# Choose default CFLAGS and warnings depending on compiler.
-#
-
+dnl
+dnl Choose default CFLAGS and warnings depending on compiler.
+dnl
 WARN_CFLAGS=""
 if test "${GCC}" = "yes" && test "${ac_env_CFLAGS_set}" != "set"; then
    WARN_CFLAGS="-g -Wall -O2"
 fi
 AC_SUBST(WARN_CFLAGS)
 
-AC_DEFINE_UNQUOTED(ENABLE_INDIRECT_DEPS, `test $use_indirect_deps = no; echo $?`, [Link library to all dependent libraries, not only directly needed ones])
-AC_SUBST(use_indirect_deps)
-
 AC_MSG_CHECKING([for Win32])
 case "$build" in
   *-*-mingw*)
@@ -155,11 +176,9 @@ fi
 AC_SUBST(GLIB_LIBS)
 AC_SUBST(GLIB_CFLAGS)
 
-AC_FUNC_ALLOCA
-
-AC_CHECK_FUNCS(setresuid setreuid,break)
-AC_CHECK_HEADERS([dirent.h unistd.h sys/wait.h malloc.h])
-
-AC_OUTPUT([Makefile
-	   check/Makefile
-	   check/config.sh])
+AC_CONFIG_FILES([
+Makefile
+check/Makefile
+check/config.sh
+])
+AC_OUTPUT