avoid updating existing libmruby.a to avoid problems on low time resolution...

avoid updating existing libmruby.a to avoid problems on low time resolution file systems; close #136

mrblib/Makefile

@@ -12,6 +12,7 @@ RLIB := $(TARGET).rbtmp
 DEPLIB := $(TARGET).d
 MRB1 := $(BASEDIR)/*.rb
 MRBS := $(MRB1)
+LIBR0 := ../lib/libmruby_core.a
 LIBR := ../lib/libmruby.a
 
 # C compiler (gcc)
@@ -47,6 +48,7 @@ all : $(LIBR)
 
 # update libmruby.a
 $(LIBR) : $(MLIB)
+	cp $(LIBR0) $(LIBR)
 	$(AR) r $(LIBR) $(MLIB)
 
 # Compile mrblib source
@@ -69,4 +71,3 @@ $(RLIB) : $(MRBS)
 clean :
 	@echo "make: removing targets, objects and depend files of `pwd`"
 	-rm -f $(MRBC) $(MLIB) $(CLIB) $(RLIB) $(DLIB) $(DEPLIB)
-

src/Makefile

@@ -4,7 +4,7 @@
 # project-specific macros
 # extension of the executable-file is modifiable(.exe .out ...)
 BASEDIR = .
-TARGET := ../lib/libmruby.a
+TARGET := ../lib/libmruby_core.a
 YSRC := $(BASEDIR)/parse.y
 YC := $(BASEDIR)/y.tab.c
 EXCEPT1 := $(YC) $(BASEDIR)/minimain.c

tools/mrbc/Makefile

@@ -5,7 +5,7 @@
 # extension of the executable-file is modifiable(.exe .out ...)
 BASEDIR := ../../src
 TARGET := ../../bin/mrbc
-LIBR := ../../lib/libmruby.a
+LIBR := ../../lib/libmruby_core.a
 ifeq ($(OS),Windows_NT)
 EXE := $(TARGET).exe
 else