Modify toolchain settings

Author: rcitach

bsp/xuantie/virt64/c906/rtconfig.py

@@ -17,13 +17,11 @@
     print('Please make sure your toolchains is GNU GCC!')
     exit(0)
 
-EXEC_PATH = r'/opt/Xuantie-900-gcc-linux-6.6.0-musl64-x86_64-V3.0.2/bin/'
 BUILD = 'debug'
 
 if PLATFORM == 'gcc':
     # toolchains
-    # PREFIX  = os.getenv('RTT_CC_PREFIX') or 'riscv64-unknown-elf-'
-    PREFIX = 'riscv64-unknown-linux-musl-'
+    PREFIX  = os.getenv('RTT_CC_PREFIX') or 'riscv64-unknown-elf-'
     CC      = PREFIX + 'gcc'
     CXX     = PREFIX + 'g++'
     AS      = PREFIX + 'gcc'