make, scripts: Re-add files necessary for building ytools

Re-add everthing needed for building and packaging ytools. This is a
big commit, 2002 lines of code. It mostly consists of C/C++ machinery,
plus some documentation-related stuff.

Signed-off-by: Jan Lindemann <jan@janware.com>

make/yapp.mk

@@ -0,0 +1,28 @@
+SRC_ALL_CPP                 += main.cpp
+YAPP_INCLUDE_DIR            ?= .
+YAPP_CLASS                  ?= $(firstword $(basename $(notdir $(wildcard $(addprefix \
+		    $(YAPP_INCLUDE_DIR)/, YApp*.h App*.h Y*.h *.h)))))
+YAPP_CLASS_H                ?= $(firstword $(wildcard $(addsuffix /$(YAPP_CLASS).h,\
+	$(YAPP_INCLUDE_DIR) $(subst -I,,$(FINAL_INCLUDE)))) $(YAPP_CLASS).h)
+YAPP_NAMESPACE              ?=
+
+ifneq ($(TARGET),mingw)
+FINAL_LDFLAGS               += -rdynamic
+endif
+
+include $(JWBDIR)/make/exe.mk
+
+all: build_EXE
+install: install_EXE
+clean: clean.yapp
+distclean:
+
+clean.yapp:
+	$(RM) -f main.cpp
+
+main.cpp: $(YAPP_CLASS_H)
+	echo "#include \"$<\"" > $@.tmp
+	if [ "$(YAPP_NAMESPACE)" ]; then echo "using namespace $(YAPP_NAMESPACE);" >> $@.tmp; fi
+	echo "#include <ytools/YAppRunner.h>" >> $@.tmp
+	echo "yapp_main($(YAPP_CLASS))" >> $@.tmp
+	mv $@.tmp $@