[libsigc++2] Support Automake silent rules

[Daniel Elstner <daniel src gnome org>]

commit db56ad989bbaa3840610dc80af5090272f896912
Author: Daniel Elstner <daniel kitta gmail com>
Date:   Sat Sep 19 03:14:24 2009 +0200

    Support Automake silent rules
    
    * configure.ac: Call the AM_SILENT_RULES macro if it is defined.
    * docs/doc-manual.am, sigc++/Makefile.am: Prefix the commands of
    custom rules with $(AM_V_GEN) or $(AM_V_at) in order to support
    the silent rules feature of Automake.

 ChangeLog          |    9 +++++++++
 configure.ac       |    1 +
 docs/doc-manual.am |   12 ++++++------
 sigc++/Makefile.am |    6 +++---
 4 files changed, 19 insertions(+), 9 deletions(-)
---
diff --git a/ChangeLog b/ChangeLog
index 218f3ec..7c307dd 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,12 @@
+2009-09-19  Daniel Elstner  <daniel kitta gmail com>
+
+	Support Automake silent rules
+
+	* configure.ac: Call the AM_SILENT_RULES macro if it is defined.
+	* docs/doc-manual.am, sigc++/Makefile.am: Prefix the commands of
+	custom rules with $(AM_V_GEN) or $(AM_V_at) in order to support
+	the silent rules feature of Automake.
+
 2009-09-17  Michael Hasselmann  <michaelh openismus com>
 
 	Documentation cleanup: sigc::hide() always only hides one signal argument
diff --git a/configure.ac b/configure.ac
index f9b6cd1..28997d3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -26,6 +26,7 @@ AC_CONFIG_MACRO_DIR([build])
 AC_CONFIG_HEADERS([config.h sigc++config.h])
 
 AM_INIT_AUTOMAKE([1.9 -Wno-portability check-news dist-bzip2 no-define nostdinc tar-pax])
+m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES])
 AM_MAINTAINER_MODE
 AC_ARG_VAR([ACLOCAL_FLAGS], [aclocal flags, e.g. -I <macro dir>])
 
diff --git a/docs/doc-manual.am b/docs/doc-manual.am
index b5bac34..8650987 100644
--- a/docs/doc-manual.am
+++ b/docs/doc-manual.am
@@ -32,15 +32,15 @@ manual_srcfile = $(srcdir)/manual/libsigc_manual.xml
 reference/html/%: | manual/html/index.html
 
 manual/html/index.html: $(manual_srcfile)
-	-rm -f manual/html/*
-	$(MKDIR_P) manual/html
-	xsltproc -o 'manual/html/' --catalogs '$(DOCBOOK_STYLESHEET)' $(manual_srcfile)
+	-$(AM_V_at)rm -f manual/html/*
+	$(AM_V_at)$(MKDIR_P) manual/html
+	$(AM_V_GEN)xsltproc -o manual/html/ --catalogs '$(DOCBOOK_STYLESHEET)' $(manual_srcfile)
 
 manual/libsigc_manual.dvi: $(manual_srcfile)
-	db2dvi -o manual $(manual_srcfile)
+	$(AM_V_GEN)db2dvi -o manual $(manual_srcfile)
 
 manual/libsigc_manual.pdf: $(manual_srcfile)
-	db2pdf -o manual $(manual_srcfile)
+	$(AM_V_GEN)db2pdf -o manual $(manual_srcfile)
 
 manual/libsigc_manual.ps: $(manual_srcfile)
-	db2ps -o manual $(manual_srcfile)
+	$(AM_V_GEN)db2ps -o manual $(manual_srcfile)
diff --git a/sigc++/Makefile.am b/sigc++/Makefile.am
index 5809e54..caa9e15 100644
--- a/sigc++/Makefile.am
+++ b/sigc++/Makefile.am
@@ -52,7 +52,7 @@ MAINTAINERCLEANFILES = $(sigc_built_h) $(sigc_built_cc)
 m4_dir = $(srcdir)/macros
 
 $(build_subdirs):
-	$(MKDIR_P) $@
+	$(AM_V_at)$(MKDIR_P) $@
 
 signal.cc:			\
 	signal.h		\
@@ -77,7 +77,7 @@ functors/slot.cc:		\
 	functors/functor_trait.h
 
 %.h: macros/%.h.m4 $(m4_dir)/template.macros.m4 | $(build_subdirs)
-	$(M4) -I $(m4_dir) -I macros $< >$@
+	$(AM_V_GEN)$(M4) -I $(m4_dir) -I macros $< >$@
 
 %.cc: macros/%.cc.m4 $(m4_dir)/template.macros.m4 | $(build_subdirs)
-	$(M4) -I $(m4_dir) -I macros $< >$@
+	$(AM_V_GEN)$(M4) -I $(m4_dir) -I macros $< >$@