Compiler/CC2640R2F: Build project issue when use CCS V7.4

Tool/software: TI C/C++ Compiler

Hi TI Members, 

As Title my CCS version is 7.4, and I do some thing that describe as following,

I tried to build project with command line,

cd D:\TI_PRJ\workspace-2\simple_peripheral_cc2640r2lp_stack_library\FlashROM_Library

"C:\\ti\\ccsv7\\utils\\bin\\gmake" -k -j 8 clean -O

"C:\\ti\\ccsv7\\utils\\bin\\gmake" -k -j 8 all -O

cd D:\TI_PRJ\workspace-2\simple_peripheral_cc2640r2lp_app\FlashROM_StackLibrary

"C:\\ti\\ccsv7\\utils\\bin\\gmake" -k -j 8 clean -O

"C:\\ti\\ccsv7\\utils\\bin\\gmake" -k -j 8 all -O

but when execute until last command , some error message shows from console,

C:\ti\xdctools_3_50_04_43_core\C:/ti/xdctools_3_50_04_43_core/xs: error:

can't create session manager: 

can't find a JVM;

try setting the environment variable 'XDCTOOLS_JAVA_HOME'

to the absolute path of any directory containing a 32-bit Java Runtime Environment (1.7 or greater);

e.g., 'C:\Program Files (x86)\Java\jre7'.

TOOLS/subdir_rules.mk:12: recipe for target 'build-1287780815-inproc' failed

gmake[1]: *** [build-1287780815-inproc] Error 1

TOOLS/subdir_rules.mk:9: recipe for target 'build-1287780815' failed

gmake: *** [build-1287780815] Error 2

gmake: Target 'all' not remade because of errors.

    When I set XDCTOOLS_JAVA_HOME done, it works fine.

    but I want to know, this configuration should be set automatically when I checked "Generate Makefiles automatically" (at project >> property >> build / builder page), Right?

       if not, is some setup error cause of this issue happened by myself?