[nautilus-python] Some modernization updates in the build system

[Adam Plumb <adamplumb src gnome org>]

commit 44d861e667d215ed868b660de11a9ed4f25458c4
Author: Adam Plumb <adamplumb gmail com>
Date:   Tue Jan 2 11:38:36 2018 -0500

    Some modernization updates in the build system

 autogen.sh                   |    6 ++----
 configure.in => configure.ac |   11 +++--------
 src/Makefile.am              |    2 +-
 3 files changed, 6 insertions(+), 13 deletions(-)
---
diff --git a/autogen.sh b/autogen.sh
index 70ac5ec..eef00e2 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -1,15 +1,13 @@
 #!/bin/sh
 
-PKG_NAME=nautilus-python
-
 srcdir=`dirname $0`
 test -z "$srcdir" && srcdir=.
 
-(test -f $srcdir/configure.in \
+(test -f $srcdir/configure.ac \
   && test -f $srcdir/README \
   && test -d $srcdir/src) || {
     echo -n "**Error**: Directory "\`$srcdir\'" does not look like the"
-    echo " top-level $PKG_NAME directory"
+    echo " top-level nautilus-python directory"
     exit 1
 }
 
diff --git a/configure.in b/configure.ac
similarity index 96%
rename from configure.in
rename to configure.ac
index 4d0a110..53f9980 100644
--- a/configure.in
+++ b/configure.ac
@@ -1,15 +1,10 @@
-AC_INIT
+AC_INIT([nautilus-python], [1.2])
 
-PACKAGE=nautilus-python
-VERSION=1.2
-
-AC_SUBST(PACKAGE)
-AC_SUBST(VERSION)
-
-AM_INIT_AUTOMAKE($PACKAGE, $VERSION)
 AM_CONFIG_HEADER(config.h)
 AC_CONFIG_MACRO_DIR([m4])
 
+AM_INIT_AUTOMAKE
+
 AC_SUBST(ACLOCAL_AMFLAGS, "-I m4 -I .")
 
 NAUTILUS_REQUIRED=2.32
diff --git a/src/Makefile.am b/src/Makefile.am
index b5030e1..4011ca5 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -1,4 +1,4 @@
-INCLUDES =                        \
+AM_CPPFLAGS =                        \
     -DG_LOG_DOMAIN=\"Nautilus-Python\"            \
     -DDATADIR=\"$(datadir)\"            \
     -DLIBDIR=\"$(libdir)\"                \