[smart][vdso] Add prefix:RTT_ in ENV variables for vdso building.

Author: BernardXiong

components/lwp/vdso/SConscript

@@ -28,9 +28,11 @@ else:
 
     process_env = os.environ.copy()
     if hasattr(rtconfig, 'EXEC_PATH') and rtconfig.EXEC_PATH is not None:
-        process_env['EXEC_PATH'] = rtconfig.EXEC_PATH
+        process_env['RTT_EXEC_PATH'] = rtconfig.EXEC_PATH
     if hasattr(rtconfig, 'PREFIX') and rtconfig.PREFIX is not None:
-        process_env['CC_PREFIX'] = rtconfig.PREFIX
+        process_env['RTT_CC_PREFIX'] = rtconfig.PREFIX
+    if hasattr(rtconfig, 'DEVICE') and rtconfig.DEVICE is not None:
+        process_env['RTT_DEVICE'] = rtconfig.DEVICE
 
     command = ["scons", "-C", vdso_arch]
     clean_command = ["scons", "-C", vdso_arch, "--clean"] 

components/lwp/vdso/user/arch/aarch64/SConstruct

@@ -7,16 +7,16 @@ vdso_path = os.path.join(vdso_usr, '..', '..', '..')
 
 EXEC_PATH = os.getenv('RTT_EXEC_PATH') or '/usr/bin'
 PREFIX    = os.getenv('RTT_CC_PREFIX') or 'aarch64-none-elf-'
+DEVICE    = os.getenv('RTT_DEVICE') or ' -march=armv8-a -mtune=cortex-a53'
 
 CC      = PREFIX + 'gcc'
 CPP     = PREFIX + 'cpp'
 AS      = PREFIX + 'gcc'
 AR      = PREFIX + 'ar'
 LINK    = PREFIX + 'gcc'
 
-DEVICE  = ' -march=armv8-a -mtune=cortex-a53 -ftree-vectorize -ffast-math -funwind-tables -fno-strict-aliasing'
 AFLAGS  = ' -x assembler-with-cpp'
-CFLAGS  = DEVICE + ' -Wall -Wno-cpp -std=gnu99 -fdiagnostics-color=always -fPIC -O2'
+CFLAGS  = DEVICE + '  -ftree-vectorize -ffast-math -funwind-tables -fno-strict-aliasing -Wall -Wno-cpp -std=gnu99 -fdiagnostics-color=always -fPIC -O2'
 LFLAGS  = DEVICE + ' -Bsymbolic -Wl,--gc-sections,-u,system_vectors -T {path}/vdso.lds'.format(path=vdso_usr)
 CFLAGS += " -I . -I {vdso_path} ".format(vdso_path=vdso_path)
 

components/lwp/vdso/user/arch/risc-v/SConstruct

@@ -7,14 +7,14 @@ vdso_path = os.path.join(vdso_usr, '..', '..', '..')
 
 EXEC_PATH = os.getenv('RTT_EXEC_PATH') or '/usr/bin'
 PREFIX    = os.getenv('RTT_CC_PREFIX') or 'riscv64-none-elf-'
+DEVICE    = os.getenv('RTT_DEVICE') or ' -march=rv64imafdc -mabi=lp64'
 
 CC      = PREFIX + 'gcc'
 CPP     = PREFIX + 'cpp'
 AS      = PREFIX + 'gcc'
 AR      = PREFIX + 'ar'
 LINK    = PREFIX + 'gcc'
 
-DEVICE  = ' -march=rv64imafdc -mabi=lp64'
 AFLAGS  = ' -x assembler-with-cpp'
 CFLAGS  = DEVICE + ' -Wall -Wno-cpp -std=gnu99 -fdiagnostics-color=always -fPIC -O2'
 LFLAGS  = DEVICE + ' -Bsymbolic -Wl,--gc-sections -T {path}/vdso.lds'.format(path=vdso_usr)