Install Ubuntu icons as option (--enable-ubuntu). (Francesco Marella)

Makefile.am

@@ -8,6 +8,7 @@ hicolor_icon_DATA = data/icons/hicolor/scalable/apps/redshift.svg \
 	data/icons/hicolor/scalable/apps/redshift-status-on.svg \
 	data/icons/hicolor/scalable/apps/redshift-status-off.svg
 
+if ENABLE_UBUNTU
 ubuntu_mono_dark_icondir = @datadir@/icons/ubuntu-mono-dark/scalable/apps
 ubuntu_mono_dark_icon_DATA = \
 	data/icons/ubuntu-mono-dark/scalable/apps/redshift-status-on.svg \
@@ -17,6 +18,7 @@ ubuntu_mono_light_icondir = @datadir@/icons/ubuntu-mono-light/scalable/apps
 ubuntu_mono_light_icon_DATA = \
 	data/icons/ubuntu-mono-light/scalable/apps/redshift-status-on.svg \
 	data/icons/ubuntu-mono-light/scalable/apps/redshift-status-off.svg
+endif
 
 
 # Desktop file
@@ -30,10 +32,13 @@ dist_man1_MANS = redshift.1
 
 EXTRA_DIST = \
 	$(hicolor_icon_DATA) \
-	$(ubuntu_mono_dark_icon_DATA) \
-	$(ubuntu_mono_light_icon_DATA) \
 	$(desktop_DATA)
 
+if ENABLE_UBUNTU
+EXTRA_DIST += \
+	$(ubuntu_mono_dark_icon_DATA) \
+	$(ubuntu_mono_light_icon_DATA)
+endif
 
 # Update PO translations
 .PHONY: update-po

configure.ac

@@ -177,6 +177,17 @@ AS_IF([test "x$enable_gui" != xno], [
 ])
 AM_CONDITIONAL([ENABLE_GUI], [test "x$enable_gui" != xno])
 
+# Check for Ubuntu icons
+AC_MSG_CHECKING([whether to enable Ubuntu icons])
+AC_ARG_ENABLE([ubuntu], [AC_HELP_STRING([--enable-ubuntu],
+	[enable Ubuntu icons])],
+        [enable_ubuntu=$enableval],[enable_ubuntu=no])
+AS_IF([test "x$enable_ubuntu" != xno], [
+        AC_MSG_RESULT([yes])
+], [
+        AC_MSG_RESULT([no])
+])
+AM_CONDITIONAL([ENABLE_UBUNTU], [test "x$enable_ubuntu" != xno])
 
 # Checks for header files.
 AC_CHECK_HEADERS([locale.h stdint.h stdlib.h string.h unistd.h sys/signal.h])
@@ -216,4 +227,5 @@ echo "
     Geoclue:		${enable_geoclue}
 
     GUI:		${enable_gui}
+    Ubuntu icons:	${enable_ubuntu}
 "