Fixed bug 4379 - fix parallel build with slibtool

orbea

I am having a parallel build problem with -j3 or higher using the autotools build and slibtool instead of GNU libtool. Basically slibtool is faster than GNU libtool and it will start working before mkdir starts or finishes creating the build/ directory.

Makefile.in

@@ -125,7 +125,7 @@ LT_RELEASE  = @LT_RELEASE@
 LT_REVISION = @LT_REVISION@
 LT_LDFLAGS  = -no-undefined -rpath $(libdir) -release $(LT_RELEASE) -version-info $(LT_CURRENT):$(LT_REVISION):$(LT_AGE)
 
-all: $(srcdir)/configure Makefile $(objects) $(objects)/$(TARGET) $(objects)/$(SDLMAIN_TARGET) $(objects)/$(SDLTEST_TARGET)
+all: $(srcdir)/configure Makefile $(objects)/$(TARGET) $(objects)/$(SDLMAIN_TARGET) $(objects)/$(SDLTEST_TARGET)
 
 $(srcdir)/configure: $(srcdir)/configure.in
 	@echo "Warning, configure is out of date, please re-run autogen.sh"
@@ -135,8 +135,9 @@ Makefile: $(srcdir)/Makefile.in
 
 Makefile.in:;
 
-$(objects):
-	$(SHELL) $(auxdir)/mkinstalldirs $@
+$(objects)/.created:
+	$(SHELL) $(auxdir)/mkinstalldirs $(objects)
+	touch $@
 
 update-revision:
 	$(SHELL) $(auxdir)/updaterev.sh