Simplify the installation process of the icons

...
Making install in icons
make[2]: Entering directory '/home/robert/devel/mate-session-manager/data/icons'
make[3]: Entering directory '/home/robert/devel/mate-session-manager/data/icons'
make[3]: Nothing to be done for 'install-exec-am'.
 /usr/bin/mkdir -p '/usr/share/icons/hicolor'
 /usr/bin/mkdir -p '/usr/share/icons/hicolor/48x48/apps'
 /usr/bin/install -c -m 644  48x48/apps/mate-session-properties.png '/usr/share/icons/hicolor/48x48/apps'
 /usr/bin/mkdir -p '/usr/share/icons/hicolor/24x24/apps'
 /usr/bin/install -c -m 644  24x24/apps/mate-session-properties.png '/usr/share/icons/hicolor/24x24/apps'
 /usr/bin/mkdir -p '/usr/share/icons/hicolor/scalable/apps'
 /usr/bin/install -c -m 644  scalable/apps/mate-session-properties.svg '/usr/share/icons/hicolor/scalable/apps'
 /usr/bin/mkdir -p '/usr/share/icons/hicolor/22x22/apps'
 /usr/bin/install -c -m 644  22x22/apps/mate-session-properties.png '/usr/share/icons/hicolor/22x22/apps'
 /usr/bin/mkdir -p '/usr/share/icons/hicolor/16x16/apps'
 /usr/bin/install -c -m 644  16x16/apps/mate-session-properties.png '/usr/share/icons/hicolor/16x16/apps'
 /usr/bin/mkdir -p '/usr/share/icons/hicolor/32x32/apps'
 /usr/bin/install -c -m 644  32x32/apps/mate-session-properties.png '/usr/share/icons/hicolor/32x32/apps'
make  install-data-hook
make[4]: Entering directory '/home/robert/devel/mate-session-manager/data/icons'
Updating Gtk icon cache.
gtk-update-icon-cache: Cache file created successfully.
...

16 files changed, 29 insertions, 151 deletions

diff --git a/data/icons/16x16/Makefile.am b/data/icons/16x16/Makefile.am
deleted file mode 100644
index f0d7ed6..0000000
--- a/data/icons/16x16/Makefile.am
+++ /dev/null
@@ -1,26 +0,0 @@
-size = 16x16
-
-iconsdir = $(datadir)/icons/hicolor/$(size)/apps
-
-icons_DATA = mate-session-properties.png
-icons_SOURCE = mate-session-properties.svg
-
-gtk_update_icon_cache = gtk-update-icon-cache -f -t $(datadir)/icons/hicolor
-
-install-data-hook:
-	@-if test -z "$(DESTDIR)"; then \
-		echo "Updating Gtk icon cache."; \
-		$(gtk_update_icon_cache); \
-	else \
-		echo "*** Icon cache not updated. After install, run this:"; \
-		echo "***   $(gtk_update_icon_cache)"; \
-	fi
-
-uninstall-hook:
-	@rm -f $(datadir)/icons/hicolor/icon-theme.cache
-
-EXTRA_DIST =		\
-	$(icons_DATA)	\
-	$(icons_SOURCE)
-
--include $(top_srcdir)/git.mk
diff --git a/data/icons/16x16/mate-session-properties.png b/data/icons/16x16/apps/mate-session-properties.png
index 1367c20..1367c20 100644
--- a/data/icons/16x16/mate-session-properties.png
+++ b/data/icons/16x16/apps/mate-session-properties.png
diff --git a/data/icons/16x16/mate-session-properties.svg b/data/icons/16x16/apps/mate-session-properties.svg
index 6408e1b..6408e1b 100644
--- a/data/icons/16x16/mate-session-properties.svg
+++ b/data/icons/16x16/apps/mate-session-properties.svg
diff --git a/data/icons/22x22/Makefile.am b/data/icons/22x22/Makefile.am
deleted file mode 100644
index 7838b1d..0000000
--- a/data/icons/22x22/Makefile.am
+++ /dev/null
@@ -1,26 +0,0 @@
-size = 22x22
-
-iconsdir = $(datadir)/icons/hicolor/$(size)/apps
-
-icons_DATA = mate-session-properties.png
-icons_SOURCE = mate-session-properties.svg
-
-gtk_update_icon_cache = gtk-update-icon-cache -f -t $(datadir)/icons/hicolor
-
-install-data-hook:
-	@-if test -z "$(DESTDIR)"; then \
-		echo "Updating Gtk icon cache."; \
-		$(gtk_update_icon_cache); \
-	else \
-		echo "*** Icon cache not updated. After install, run this:"; \
-		echo "***   $(gtk_update_icon_cache)"; \
-	fi
-
-uninstall-hook:
-	@rm -f $(datadir)/icons/hicolor/icon-theme.cache
-
-EXTRA_DIST =		\
-	$(icons_DATA)	\
-	$(icons_SOURCE)
-
--include $(top_srcdir)/git.mk
diff --git a/data/icons/22x22/mate-session-properties.png b/data/icons/22x22/apps/mate-session-properties.png
index 12225ee..12225ee 100644
--- a/data/icons/22x22/mate-session-properties.png
+++ b/data/icons/22x22/apps/mate-session-properties.png
diff --git a/data/icons/22x22/mate-session-properties.svg b/data/icons/22x22/apps/mate-session-properties.svg
index ca49603..ca49603 100644
--- a/data/icons/22x22/mate-session-properties.svg
+++ b/data/icons/22x22/apps/mate-session-properties.svg
diff --git a/data/icons/24x24/Makefile.am b/data/icons/24x24/Makefile.am
deleted file mode 100644
index 29d2692..0000000
--- a/data/icons/24x24/Makefile.am
+++ /dev/null
@@ -1,24 +0,0 @@
-size = 24x24
-
-iconsdir = $(datadir)/icons/hicolor/$(size)/apps
-
-icons_DATA = mate-session-properties.png
-
-gtk_update_icon_cache = gtk-update-icon-cache -f -t $(datadir)/icons/hicolor
-
-install-data-hook:
-	@-if test -z "$(DESTDIR)"; then \
-		echo "Updating Gtk icon cache."; \
-		$(gtk_update_icon_cache); \
-	else \
-		echo "*** Icon cache not updated. After install, run this:"; \
-		echo "***   $(gtk_update_icon_cache)"; \
-	fi
-
-uninstall-hook:
-	@rm -f $(datadir)/icons/hicolor/icon-theme.cache
-
-EXTRA_DIST =		\
-	$(icons_DATA)
-
--include $(top_srcdir)/git.mk
diff --git a/data/icons/24x24/mate-session-properties.png b/data/icons/24x24/apps/mate-session-properties.png
index ac81c7a..ac81c7a 100644
--- a/data/icons/24x24/mate-session-properties.png
+++ b/data/icons/24x24/apps/mate-session-properties.png
diff --git a/data/icons/32x32/Makefile.am b/data/icons/32x32/Makefile.am
deleted file mode 100644
index ecac65c..0000000
--- a/data/icons/32x32/Makefile.am
+++ /dev/null
@@ -1,26 +0,0 @@
-size = 32x32
-
-iconsdir = $(datadir)/icons/hicolor/$(size)/apps
-
-icons_DATA = mate-session-properties.png
-icons_SOURCE = mate-session-properties.svg
-
-gtk_update_icon_cache = gtk-update-icon-cache -f -t $(datadir)/icons/hicolor
-
-install-data-hook:
-	@-if test -z "$(DESTDIR)"; then \
-		echo "Updating Gtk icon cache."; \
-		$(gtk_update_icon_cache); \
-	else \
-		echo "*** Icon cache not updated. After install, run this:"; \
-		echo "***   $(gtk_update_icon_cache)"; \
-	fi
-
-uninstall-hook:
-	@rm -f $(datadir)/icons/hicolor/icon-theme.cache
-
-EXTRA_DIST =		\
-	$(icons_DATA)	\
-	$(icons_SOURCE)
-
--include $(top_srcdir)/git.mk
diff --git a/data/icons/32x32/mate-session-properties.png b/data/icons/32x32/apps/mate-session-properties.png
index 25df9d3..25df9d3 100644
--- a/data/icons/32x32/mate-session-properties.png
+++ b/data/icons/32x32/apps/mate-session-properties.png
diff --git a/data/icons/32x32/mate-session-properties.svg b/data/icons/32x32/apps/mate-session-properties.svg
index 33b5fee..33b5fee 100644
--- a/data/icons/32x32/mate-session-properties.svg
+++ b/data/icons/32x32/apps/mate-session-properties.svg
diff --git a/data/icons/48x48/Makefile.am b/data/icons/48x48/Makefile.am
deleted file mode 100644
index 90d5571..0000000
--- a/data/icons/48x48/Makefile.am
+++ /dev/null
@@ -1,24 +0,0 @@
-size = 48x48
-
-iconsdir = $(datadir)/icons/hicolor/$(size)/apps
-
-icons_DATA = mate-session-properties.png
-
-gtk_update_icon_cache = gtk-update-icon-cache -f -t $(datadir)/icons/hicolor
-
-install-data-hook:
-	@-if test -z "$(DESTDIR)"; then \
-		echo "Updating Gtk icon cache."; \
-		$(gtk_update_icon_cache); \
-	else \
-		echo "*** Icon cache not updated. After install, run this:"; \
-		echo "***   $(gtk_update_icon_cache)"; \
-	fi
-
-uninstall-hook:
-	@rm -f $(datadir)/icons/hicolor/icon-theme.cache
-
-EXTRA_DIST =		\
-	$(icons_DATA)
-
--include $(top_srcdir)/git.mk
diff --git a/data/icons/48x48/mate-session-properties.png b/data/icons/48x48/apps/mate-session-properties.png
index 32c2358..32c2358 100644
--- a/data/icons/48x48/mate-session-properties.png
+++ b/data/icons/48x48/apps/mate-session-properties.png
diff --git a/data/icons/Makefile.am b/data/icons/Makefile.am
index 014b2e4..da7ab8a 100644
--- a/data/icons/Makefile.am
+++ b/data/icons/Makefile.am
@@ -1,3 +1,31 @@
-SUBDIRS = 16x16 22x22 24x24 32x32 48x48 scalable
+appiconsdir = $(datadir)/icons/hicolor
+
+nobase_dist_appicons_DATA = \
+	16x16/apps/mate-session-properties.png \
+	22x22/apps/mate-session-properties.png \
+	24x24/apps/mate-session-properties.png \
+	32x32/apps/mate-session-properties.png \
+	48x48/apps/mate-session-properties.png \
+	scalable/apps/mate-session-properties.svg
+
+noinst_DATA = \
+	16x16/apps/mate-session-properties.svg \
+	22x22/apps/mate-session-properties.svg \
+	32x32/apps/mate-session-properties.svg
+
+gtk_update_icon_cache = gtk-update-icon-cache -f -t $(datadir)/icons/hicolor
+
+install-data-hook: update-icon-cache
+uninstall-hook: update-icon-cache
+update-icon-cache:
+	@-if test -z "$(DESTDIR)"; then \
+		echo "Updating Gtk icon cache."; \
+		$(gtk_update_icon_cache); \
+	else \
+		echo "*** Icon cache not updated.  After (un)install, run this:"; \
+		echo "***   $(gtk_update_icon_cache)"; \
+	fi
+
+EXTRA_DIST = $(noinst_DATA)
 
 -include $(top_srcdir)/git.mk
diff --git a/data/icons/scalable/Makefile.am b/data/icons/scalable/Makefile.am
deleted file mode 100644
index a097468..0000000
--- a/data/icons/scalable/Makefile.am
+++ /dev/null
@@ -1,24 +0,0 @@
-size = scalable
-
-iconsdir = $(datadir)/icons/hicolor/$(size)/apps
-
-icons_DATA = mate-session-properties.svg
-
-gtk_update_icon_cache = gtk-update-icon-cache -f -t $(datadir)/icons/hicolor
-
-install-data-hook:
-	@-if test -z "$(DESTDIR)"; then \
-		echo "Updating Gtk icon cache."; \
-		$(gtk_update_icon_cache); \
-	else \
-		echo "*** Icon cache not updated. After install, run this:"; \
-		echo "***   $(gtk_update_icon_cache)"; \
-	fi
-
-uninstall-hook:
-	@rm -f $(datadir)/icons/hicolor/icon-theme.cache
-
-EXTRA_DIST =		\
-	$(icons_DATA)
-
--include $(top_srcdir)/git.mk
diff --git a/data/icons/scalable/mate-session-properties.svg b/data/icons/scalable/apps/mate-session-properties.svg
index a06a4f2..a06a4f2 100644
--- a/data/icons/scalable/mate-session-properties.svg
+++ b/data/icons/scalable/apps/mate-session-properties.svg