Improve the configure process

Use the macro "AC_CONFIG_AUX_DIR" to isolate the auxiliary build tools
in a dedicated directory.

Makefile.am

@@ -1,4 +1,4 @@
 bin_PROGRAMS = smenu
 smenu_SOURCES = smenu.c
 dist_man_MANS = smenu.1
-EXTRA_DIST = smenu.spec.in ChangeLog smenu.spec build.sh version COPYRIGHT INTERNALS.rst LICENSE.rst README.rst examples
+EXTRA_DIST = smenu.spec.in ChangeLog smenu.spec build.sh version COPYRIGHT INTERNALS.rst LICENSE.rst README.rst examples build-aux

Makefile.in

@@ -82,9 +82,14 @@ bin_PROGRAMS = smenu$(EXEEXT)
 subdir = .
 DIST_COMMON = $(srcdir)/Makefile.in $(srcdir)/Makefile.am \
 	$(top_srcdir)/configure $(am__configure_deps) \
-	$(srcdir)/config.h.in $(srcdir)/smenu.spec.in depcomp \
-	$(dist_man_MANS) ChangeLog TODO config.guess config.sub \
-	install-sh missing
+	$(srcdir)/config.h.in $(srcdir)/smenu.spec.in \
+	$(top_srcdir)/build-aux/depcomp $(dist_man_MANS) ChangeLog \
+	TODO build-aux/config.guess build-aux/config.sub \
+	build-aux/depcomp build-aux/install-sh build-aux/missing \
+	$(top_srcdir)/build-aux/config.guess \
+	$(top_srcdir)/build-aux/config.sub \
+	$(top_srcdir)/build-aux/install-sh \
+	$(top_srcdir)/build-aux/missing
 ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
 am__aclocal_m4_deps = $(top_srcdir)/configure.ac
 am__configure_deps = $(am__aclocal_m4_deps) $(CONFIGURE_DEPENDENCIES) \
@@ -113,7 +118,7 @@ am__v_at_ = $(am__v_at_@AM_DEFAULT_V@)
 am__v_at_0 = @
 am__v_at_1 = 
 DEFAULT_INCLUDES = -I.@am__isrc@
-depcomp = $(SHELL) $(top_srcdir)/depcomp
+depcomp = $(SHELL) $(top_srcdir)/build-aux/depcomp
 am__depfiles_maybe = depfiles
 am__mv = mv -f
 COMPILE = $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) \
@@ -302,7 +307,7 @@ top_builddir = @top_builddir@
 top_srcdir = @top_srcdir@
 smenu_SOURCES = smenu.c
 dist_man_MANS = smenu.1
-EXTRA_DIST = smenu.spec.in ChangeLog smenu.spec build.sh version COPYRIGHT INTERNALS.rst LICENSE.rst README.rst examples
+EXTRA_DIST = smenu.spec.in ChangeLog smenu.spec build.sh version COPYRIGHT INTERNALS.rst LICENSE.rst README.rst examples build-aux
 all: config.h
 	$(MAKE) $(AM_MAKEFLAGS) all-am
 

configure

@@ -2210,10 +2210,8 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
 ac_config_headers="$ac_config_headers config.h"
 
-am__api_version='1.13'
-
 ac_aux_dir=
-for ac_dir in "$srcdir" "$srcdir/.." "$srcdir/../.."; do
+for ac_dir in build-aux "$srcdir"/build-aux; do
   if test -f "$ac_dir/install-sh"; then
     ac_aux_dir=$ac_dir
     ac_install_sh="$ac_aux_dir/install-sh -c"
@@ -2229,7 +2227,7 @@ for ac_dir in "$srcdir" "$srcdir/.." "$srcdir/../.."; do
   fi
 done
 if test -z "$ac_aux_dir"; then
-  as_fn_error $? "cannot find install-sh, install.sh, or shtool in \"$srcdir\" \"$srcdir/..\" \"$srcdir/../..\"" "$LINENO" 5
+  as_fn_error $? "cannot find install-sh, install.sh, or shtool in build-aux \"$srcdir\"/build-aux" "$LINENO" 5
 fi
 
 # These three variables are undocumented and unsupported,
@@ -2241,6 +2239,8 @@ ac_config_sub="$SHELL $ac_aux_dir/config.sub"  # Please don't use this var.
 ac_configure="$SHELL $ac_aux_dir/configure"  # Please don't use this var.
 
 
+am__api_version='1.13'
+
 # Find a good install program.  We prefer a C program (faster),
 # so one script is as good as another.  But avoid the broken or
 # incompatible versions:

configure.ac

@@ -7,6 +7,7 @@ AC_PREREQ([2.69])
 AC_INIT([smenu], [my_version], [p.gen.progs@gmail.com])
 AC_CONFIG_SRCDIR([smenu.c])
 AC_CONFIG_HEADERS([config.h])
+AC_CONFIG_AUX_DIR([build-aux])
 AM_INIT_AUTOMAKE([no-dist-gzip dist-bzip2 foreign -Wall])
 AM_SILENT_RULES([yes])