turn off openblas and related packages by default

Readme.md

@@ -139,9 +139,17 @@ make install CXXSTD="-std=c++98" (default)
 make install CXXSTD="-std=c++11"
 ```
 
-Users must make sure the setting is consistent to dependent libraries during compilation, such Boost, Lemon, etc. 
+Users must make sure the setting is consistent to dependent libraries during compilation, such as Boost, Lemon, etc. 
 For example, if Boost is compiled with "clang++ -stdlib=libstdc++ -std=c++98", the same setting should be used for components dependent to Boost. 
 
+### 4. Customize OPENBLAS options 
+
+* There is a third party OpenBlas required by some other third party packages, such as Csdp and liblinear. OPENBLAS option is used to control whether compiling these packages. 
+
+If you do not need these packages, set OPENBLAS=0 (default); 
+otherwise, set OPENBLAS=1.
+The default version of OpenBlas is not very stable for cross platforms, which often results in compiling errors. 
+
 ## Examples
 
 In the subdirectories of source code, there are test folders including test/example programs.

limbo/thirdparty/Makefile

@@ -17,6 +17,8 @@ CTHREADPOOL_LIB = $(LIMBO_ROOT_DIR)/lib/libthpool.a
 #                         Compilation Flags
 # ==========================================================================
 
+# default OPENBLAS is off 
+OPENBLAS = 0
 # default DBG is off
 DBG = 0
 
@@ -33,8 +35,13 @@ endif
 #                         Standard Setting
 # ==========================================================================
 
+ifeq ($(OPENBLAS), 1)
 all: $(CSDP_LIB) $(OPENBLAS_LIB) $(LIBLINEAR_LIB) $(CTHREADPOOL_LIB)
-	@echo ">> building default"
+	@echo ">> building default with OPENBLAS on"
+else 
+all: $(CTHREADPOOL_LIB)
+	@echo ">> building default with OPENBLAS off"
+endif 
 
 $(OPENBLAS_LIB): 
 	@echo ">> building OpenBLAS"