don't build enumtypes so often

we were only replacing enumtypes if it had changed, but this meant that
make usually thought it was out of date compared to the source files,
and rebuilt it, which needed perl

now we always replace it, so (hopefully) perl is no longer a
compile-time dependency

ChangeLog

@@ -1,5 +1,6 @@
 29/8/17 started 8.5.9
 - make --fail stop jpeg read on any libjpeg warning, thanks @mceachen
+- don't build enumtypes so often, removing perl as a compile dependancy
 
 2/8/17 started 8.5.8
 - fix transparency detection in merge, thanks Haida

libvips/include/vips/Makefile.am

@@ -72,11 +72,7 @@ vips_scan_headers = \
 	${top_srcdir}/libvips/include/vips/morphology.h \
 	${top_srcdir}/libvips/include/vips/draw.h \
 	${top_srcdir}/libvips/include/vips/basic.h \
-	${top_srcdir}/libvips/include/vips/version.h \
 	${top_srcdir}/libvips/include/vips/object.h
 
-enumtypes.h: $(vips_scan_headers) Makefile
-	glib-mkenums --template enumtemplate \
-		$(vips_scan_headers) > xgen-geth && \
-	( cmp -s xgen-geth enumtypes.h || cp xgen-geth enumtypes.h ) && \
-	rm -f xgen-geth 
+enumtypes.h: $(vips_scan_headers) Makefile.am
+	glib-mkenums --template enumtemplate $(vips_scan_headers) > enumtypes.h

libvips/iofuncs/Makefile.am

@@ -70,11 +70,7 @@ vips_scan_headers = \
 	${top_srcdir}/libvips/include/vips/morphology.h \
 	${top_srcdir}/libvips/include/vips/draw.h \
 	${top_srcdir}/libvips/include/vips/basic.h \
-	${top_srcdir}/libvips/include/vips/version.h \
 	${top_srcdir}/libvips/include/vips/object.h
 
-enumtypes.c: $(vips_scan_headers) Makefile
-	glib-mkenums --template enumtemplate \
-		$(vips_scan_headers) > xgen-getc && \
-	( cmp -s xgen-getc enumtypes.c || cp xgen-getc enumtypes.c ) && \
-	rm -f xgen-getc
+enumtypes.c: $(vips_scan_headers) Makefile.am
+	glib-mkenums --template enumtemplate $(vips_scan_headers) > enumtypes.c