add some output when generating arginfo

Author: remicollet

build/Makefile.global

@@ -146,9 +146,11 @@ prof-use:
 %_arginfo.h: %.stub.php
 	@if test -e "$(top_srcdir)/build/gen_stub.php"; then \
 		if test ! -z "$(PHP_EXECUTABLE)" && test -x "$(PHP_EXECUTABLE)"; then \
+			echo Parse $< to generate $@;\
 			$(PHP_EXECUTABLE) $(top_srcdir)/build/gen_stub.php $<; \
 		elif type php >/dev/null 2>/dev/null; then \
 			if test `php -v | head -n1 | cut -d" " -f 2 | sed "s/$$/\n7.0.99/" | sort -rV | head -n1` != "7.0.99"; then \
+				echo Parse $< to generate $@;\
 				php $(top_srcdir)/build/gen_stub.php $<; \
 			fi; \
 		fi; \