use %.subdir-{all,clean} targets in root makefile

- improves consistency: this mechanism is used in other places as well
- fixes dependency tracking: root makefile does not check files directly
  but delegates the task to sub makefiles

diff --git a/Makefile b/Makefile
index e2af9b9..63a4393 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 include config.mk
 
-all: $(SRCDIR)/vimb
+all: $(SRCDIR).subdir-all
 
 options:
        @echo "vimb build options:"
@@ -10,10 +10,7 @@ options:
        @echo "EXTCFLAGS = $(EXTCFLAGS)"
        @echo "CC        = $(CC)"
 
-$(SRCDIR)/vimb:
-       @$(MAKE) $(MFLAGS) -C $(SRCDIR)
-
-install: $(SRCDIR)/vimb
+install: $(SRCDIR).subdir-all
        @# binary
        install -d $(BINPREFIX)
        install -m 755 $(SRCDIR)/vimb $(BINPREFIX)/vimb
@@ -32,8 +29,7 @@ install: $(SRCDIR)/vimb
 uninstall:
        $(RM) $(BINPREFIX)/vimb $(DESTDIR)$(MANDIR)/man1/vimb.1 $(EXTPREFIX)/$(EXTTARGET)
 
-clean:
-       @$(MAKE) $(MFLAGS) -C $(SRCDIR) clean
+clean: $(SRCDIR).subdir-clean
 
 sandbox:
        @make $(MFLAGS) RUNPREFIX=$(CURDIR)/sandbox/usr PREFIX=/usr DESTDIR=./sandbox install
@@ -41,4 +37,10 @@ sandbox:
 runsandbox: sandbox
        sandbox/usr/bin/vimb
 
-.PHONY: all vimb options clean install uninstall sandbox
+%.subdir-all:
+       @$(MAKE) $(MFLAGS) -C $*
+
+%.subdir-clean:
+       @$(MAKE) $(MFLAGS) -C $* clean
+
+.PHONY: all options install uninstall clean sandbox runsandbox